107results about "Ageing prevention agents addition" patented technology

A process for producing a brightness stabilization mixture of water-soluble organic compounds from biomass pyrolysis oils comprising:a) size-reducing biomass material and pyrolyzing the size-reduced biomass material in a fluidized bed reactor;b) separating a char / ash component while maintaining char-pot temperatures to avoid condensation of pyrolysis vapors;c) condensing pyrolysis gases and vapors, and recovering pyrolysis oils by mixing the oils with acetone to obtain an oil-acetone mixture;d) evaporating acetone and recovering pyrolysis oils;e) extracting the pyrolysis oils with water to obtain a water extract;f) slurrying the water extract with carbon while stirring, and filtering the slurry to obtain a colorless filtrate;g) cooling the solution and stabilizing the solution against thermally-induced gelling and solidification by extraction with ethyl acetate to form an aqueous phase lower layer and an organic phase upper layer;h) discarding the upper organic layer and extracting the aqueous layer with ethyl acetate, and discarding the ethyl acetate fraction to obtain a brown-colored solution not susceptible to gelling or solidification upon heating;i) heating the solution to distill off water and other light components and concentrating a bottoms fraction comprising hydroxyacetaldehyde and other non-volatile components having high boiling points; andj) decolorizing the stabilized brown solution with activated carbon to obtain a colorless solution.

The invention relates to a preparation method of sun-screening agent for decorative paper production, and belongs to the technical field of sun-screening agent. The sun-screening agent loaded with nanometer titania is prepared by taking kaolinite, polyethylene glycol and nanometer titania as raw materials, and mixing materials in a desalting water and forming slurry; delivering the slurry to a grinding machine to grind, wherein the grinding process includes preparation of nanometer kaolinite, , dispersion of nanometer titania, and loading of nanometer titania; realizing intercalation and modification of kaolinite by nanometer titania through a mechanical force chemical intercalation process of the kaolinite; then performing dispersing, aging, drying, breaking and other procedures to obtain the sun-screening agent. The preparation process is free from waste water, the technique device is simple and the operation is also simple; the nanometer titania is nanometer TiO2 aggregate for the SCR denitration catalyst carrier; the technical and environment protection problems of preparation of nanometer TiO2 are eliminated, the production process is simplified; the sun-screening agent for decorative paper production can improve the sun-screening and anti-aging performances of the decorative paper.

The invention belongs to the technical field of papermaking, and discloses a method for making manual watercolour paper. The method comprises the following steps that 1, pulping is carried out; 2, gluing in pulp is carried out; 3, the pulp is poured into a container, water is added, and the mixture is fully mixed to be uniform; 4, paper fishing is carried out; 5, wet paper squeezing is carried out; 6, vacuum water absorption is carried out; 7, double rollers are used for embossing; 8, drying is carried out through a drying cylinder; 9, surface gluing is carried out, wherein the surface of dried finished paper is coated with gelatin or polypropylene glue or polypropylene glue, and natural drying is carried out. The manual watercolour paper good in drawing performance, high in ageing resistance and capable of meeting the individual needs of painters is obtained.

Novel substantially odor-free polymeric thiol-containing antioxidant compounds suitable for preventing light induced brightness reversion or yellowing of pulps and papers and polymeric materials are described. The novel compounds are based on a polymeric backbone having thiolactate or thioglycolate groups grafted onto the ends thereof and are soluble in water or alcohol.

The invention discloses a method for reinforcing and deacidifying paper archives. The method comprises the steps of brushing or spraying epoxy chloropropane to to-be-processed paper archives, brushing or spraying cellulose ether stabilized nano-alkaline earth metal hydroxide alcohol-water dispersion liquid, and drying, so as to finish the reinforcement and deacidification of the paper archives; by utilizing an alkaline earth metal hydroxide, the acidy paper archives are neutralized, cross-linking reaction among epoxy chloropropane, paper fibers and cellulose ether is catalyzed under an alkaline condition, cellulose ether which is lined with chemical bonds of the paper fibers and has a cross-linked net structure is formed, and thus the paper archives are reinforced; and the cellulose ether stabilized nano-alkaline earth metal hydroxide is uniformly dispersed into the paper fibers, so that the paper archives are simultaneously reinforced and deacidified. The method has the beneficial effects that the operation is simple, the colors and prints of the acidified paper archives are not obviously influenced, the pH and mechanical strength of the paper archives are remarkably increased, and the durability of the paper archives is improved.

The invention relates to absorptive-type electromagnetic shielding paper and a preparation method thereof. The absorptive-type electromagnetic shielding paper comprises a composite absorbent component and a skeleton component, wherein the composite absorbent component is prepared from the following raw materials in percentage by mass: 12%-48% of nickel powder, 8%-32% of silicon carbide and 20%-80% of ferrite / glass fiber; and the skeleton component is a plant fiber. The absorptive-type electromagnetic shielding paper provided by the invention is capable of absorbing and suppressing secondary reflection clutter, and is high in high-frequency electromagnetic shielding effectiveness, simple in preparation technology and relatively low in cost.

The invention discloses a preparation method and an application of a biomass ultraviolet absorbent. The biomass ultraviolet absorbent comprises, by weight, 3-6 parts of biomass active extracting solution, 1.5-3 parts of dry biomass particles, 0.75-1.5 parts of natural mineral particles, 1-2 parts of biomass film-forming agents and 80-160 parts of solvents. The biomass ultraviolet absorbent is prepared from natural bio-based or raw mineral materials, achieves excellent anti-ultraviolet effects by the aid of synergistic effects of wet invasive plant active extracting solution, the dry biomass particles and the natural mineral particles, is environmentally friendly, degradable and non-irritating to organisms, can be widely applied to textiles, paper products, plastics, cosmetics and the like,and further has a certain far infrared release function.

The invention discloses aramid fiber / polyimide fiber composite insulation paper with excellent breakdown resistance. The preparation method comprises the following steps: performing surface oxidation heat treatment on aluminum nitride, thereby enhancing the hydration resistance; performing protonation pretreatment on polyimide chopped fibers, performing pulping, putting a mixture of the polyimide short fiber pulp and chopped aramid fibers into a fiber fluffer, performing fluffing treatment, adding the aluminum nitride suspension, performing mixing, making base paper on a paper sheet former, and performing isothermal boosting hot pressing treatment to obtain the composite insulation paper. The aluminum nitride powder is subjected to heat treatment in an oxidizing atmosphere, so that a compact Al2O3 film is formed on the surface, thereby effectively preventing the hydrolysis reaction of the aluminum nitride; the aluminum nitride powder is mixed with the mixed fiber pulp, so that the small-size aluminum nitride powder is uniformly dispersed in the insulation paper, thereby filling up abundant gaps in the fiber paper structure; and interface traps are formed between the nanoparticles and fibers, thereby implementing effective binding on charges, and enhancing the breakdown strength of the insulation paper.

The invention discloses a multifunctional protective liquid for paper-based material printed matters, which includes, by mass, 0.2-2.0% of a nano oxide, 0.01-1.0% of a dispersant, 1.0-5.0% of a cellulose-type organic substance, and 92.9-98.79% of a solvent, the sum of the mass percentages of all the components is 100%. An application method includes the steps of: uniformly mixing a dispersion liquid of the nano oxide with the cellulose-type organic substance and directly coating the surface of the paper printed matters with the mixture; or firstly coating the surface of the paper printed matters with the cellulose-type organic substance, naturally drying the paper printed matters in air, and then coating the paper printed matters with the dispersion liquid of the nano oxide. The multifunctional protective liquid is prepared with the nano oxide, the cellulose-type organic substance, the dispersant, and the solvent ethanol as main raw materials and is used for the paper-based material printed matters. The multifunctional protective liquid has simple formula, is environment-friendly and toxic-free and has good pre-protective effect on the paper printed matters.

The light stabilizer emulsion composition of the present invention includes: water; an emulsifier; and a light stabilizer and / or a UV absorber, in which components constituting the light stabilizer emulsion composition has an average particle size of 150 nm or less.

The invention discloses antibacterial anti-ultraviolet-ray melamine impregnated paper and a preparation method thereof. The melamine impregnated paper comprises a melamine resin layer, a first anti-ultraviolet-ray urea-formaldehyde resin layer, plain base paper or printing decoration paper, a second anti-ultraviolet-ray urea-formaldehyde resin layer and an anti-bacterial anti-ultraviolet-ray melamine resin layer, wherein the melamine resin layer, the first anti-ultraviolet-ray urea-formaldehyde resin layer, the plain base paper or printing decoration paper, the second anti-ultraviolet-ray urea-formaldehyde resin layer and the anti-bacterial anti-ultraviolet-ray melamine resin layer are sequentially arranged from bottom to top. The preparation method comprises: 1) preparing raw materials; 2) impregnating plain base paper or printing decoration paper with an anti-ultraviolet-ray urea-formaldehyde resin layer; and 3) respectively arranging a melamine resin layer and an antibacterial anti-ultraviolet-ray melamine resin layer on both surfaces of the plain base paper or printing decoration paper treated in the step 2). According to the present invention, the melamine impregnated paper has excellent anti-ultraviolet-ray and antibacterial bactericidal effects; and the decorative plate obtained by gluing the melamine impregnated paper and the substrate has characteristics of wear resistance, scratch resistance, acid resistance, alkali resistance, blanching resistance, pollution resistance, aging fading resistance, good antibacterial effect and long service life.

The present invention relates the problem of color formation during paper production resulting in yellowing / brightness reversion of the pulp or the paper. This yellowing / brightness reversion can be reduced by the method of the present invention, which method relates to reducing yellowing of pulp and paper comprising adding or generating cyclodextrin to the pulp before or during washing.

The invention provides a preparation method of Xuan paper primary pulp, belongs to the technical field of papermaking, and solves the technical problems such as slow production of Xuan paper primary pulp. The preparation method of the Xuan paper primary pulp comprises the steps of S1, taking sandy field rice straw, removing rice leaves and panicles, then performing bundling and performing soakingin water; S2, after soaking the sandy field rice straw in the S1 for 30-35 days, then performing unstacking, and peeling wingceltis taken in the S1 to obtain wingceltis peel; S3, cooking the sandy rice straw in the S2 with water steam for 30-35h, adding lime in water, then performing cooling, performing exposure in the sun for 3-5 days, repeatedly performing the above operations for 6-7 times, finally performing air-drying to a white color to obtain a straw material; S4, drying and stacking the straw material in the S3 and the wingceltis peel according to a proportion of 7:3; and S5, accordingto the mass percentage, adding a plant anti-photooxidant, an aid and calcium activator powder, and performing even mixing to obtain the Xuan paper primary pulp. The preparation method has the characteristics of shortening the production time of the Xuan paper primary pulp.

Coating compositions, methods of applying the coating compositions, and articles incorporating the coating compositions are provided. The coating compositions are useful for coating a variety of substrates to improve the appearance and printability of the substrates. The coating compositions incorporate pigment system, a binder, and an optical brightener. The binder incorporates a polyvinyl alcohol polymer. The coating compositions exhibit whitening and reversion characteristics superior to coating compositions incorporating conventional components while providing cost advantages over conventional coatings.

The light stabilizer emulsion composition of the present invention includes: water; an emulsifier; and a light stabilizer and / or a UV absorber, in which components constituting the light stabilizer emulsion composition has an average particle size of 150 nm or less.

The invention discloses anti-mosquito environment-friendly wallpaper, made from, by weight, 20-30 parts of used clothes, 10-20 parts of waste wood, 10-20 parts of straws, 2-5 parts of nano zinc oxide, 1-2 parts of chitosan, 2-8 parts of sodium sulfate, 10-25 parts of sodium hydroxide, 5-10 parts of cassava starch, 2-5 parts of butyl acetate, 1-2 parts of titanate coupling agent, 1-3 parts of cationic polyacrylamide, 1-2 parts of sodium cocoyl glycinate, 1-2 parts of azodiisobutyronitrile, 60-100 parts of deionized water, 20-30 parts of ethyl acetate, and 5-10 parts of Chinese herbal powder; the anti-mosquito environment-friendly wallpaper employs the used clothes, waste wood and straws as fiber bases, resources are effectively utilized, resource waste is avoided, and environment protection is achieved; the anti-mosquito environment-friendly wallpaper using the Chinese herbal powder as a plant material can dispel mosquitoes but is harmless to human bodies, and can soothe body and mind and calm the mind since containing nerve-soothing ingredients.

The invention provides a kind of reprintable paper, which is prepared by the following preparation method: pulp is prepared to obtain modulated paper material; the modulated paper material is sequentially formed, pressed, coated and calendered to obtain reprintable paper Paper; the coating solution used in the coating includes solvochromic spiro compound dyes, organic solvents, water and sizing agents. The reprintable paper provided by the invention includes a solvochromic spiro compound dye, which can display desired characters or patterns when exposed to water or an acidic color developer, and the characters or patterns will disappear after a certain period of time, so that the characters or patterns can be reused. Experimental results show that: for the printing paper of the present invention, when water is used as the color developer, the color development time is 10min to 30h; when an acid solution is used as the color developer, the color development time is 30min to 100h. The preparation method of the present invention is simple in process, and can be obtained by adding dyes to the surface sizing step of a mature papermaking process, and the cost is low.

The invention belongs to the technical field of ancient book protection, and discloses a deacidification enhancement treatment solution and a method for treating aged paper. The deacidification enhancement treatment solution is composed of metal oxide nanoparticles, a PEI dispersant and a solvent. The treatment method comprises the steps: cleaning impurities on the surface of the aged paper, putting the aged paper into a vacuum drying device after constant temperature and humidity treatment, and treating; laying the pre-treated aged paper flat in an airtight box, carrying out pressurization atomization by the deacidification enhancement treatment solution, and carrying out atomization treatment; and then placing the aged paper in a fuming cupboard, air-drying, evenly and smoothly placing between wool cloth, placing the aged paper and the wool cloth in the vacuum drying device together, carrying out drying treatment, taking out, placing in a constant temperature and humidity environment, balancing water, and completing the treatment. The deacidification enhancement treatment solution and the treatment method have the multifunctional treatment effects of deacidification, enhancement,bacteriostasis and aging resistance.

The invention discloses environmental-friendly wallpaper. The environmental-friendly wallpaper is prepared from the following materials in parts by weight: 20-30 parts of old clothes, 10-20 parts of cane trash, 10-20 parts of jute, 2-5 parts of nano zinc oxide, 1-2 parts of polydimethylsiloxane, 2-8 parts of sodium sulfide, 10-25 parts of sodium hydroxide, 5-10 parts of green bean starch, 2-5 parts of butyl acrylate, 1-2 parts of a silane coupling agent, 1-3 parts of cationic polyacrylamide, 1-2 parts of sodium dodecyl benzene sulfonate, 1-2 parts of ammonium persulfate, 60-100 parts of deionized water and 20-30 parts of ethanol. According to the environmental-friendly wallpaper disclosed by the invention, the old clothes, cane trash and jute serve as fiber base materials, the resources are effectively utilized, resource waste is avoided, and an environmental-friendly effect is achieved.

A method is disclosed for reducing or inhibiting alkaline darkening of mechanical pulp caused by the presence of calcium carbonate filler during production; the method comprises adding a sulfite, or sulfur-containing reducing agent, especially a sulfite to the mechanical pulp and the filler; the method is usefully applied in the production of mechanical pulp and paper in which calcium carbonate is used as a filler and also in the production of paper at neutral or mildly alkaline conditions.

The invention discloses a high breakdown strength transformer insulation paper, which is prepared from the following raw materials by weight part: 12-15 of nano-titanium dioxide, 2-3 of phenolic resin, 500-550 of a pulp board, 1.3-1.5 of sodium silicate, 1-1.3 of sodium carboxymethyl cellulose, 1.3-1.5 of carbon black, 4.4-5 of aramid fiber, 25-30 of bakelite, 0.5-0.7 of pentaerythritol ester of rosin, 0.5-0.7 of butyl methacrylate, and a proper amount of deionized water. The insulation paper provided by the invention has the advantages of long service life, high breakdown voltage, good safety, and good application prospect in transformers.

The invention discloses preparation of a corundum fiber insulating paper for transformers. The corundum fiber insulating paper for transformers is prepared from the following raw materials by weight part: 12-15 of nano-titanium dioxide, 2-3 of phenolic resin, 500-550 of a pulp board, 1.3-1.5 of sodium silicate, 1-1.3 of sodium carboxymethyl cellulose, 2.3-2.6 of corundum fiber, 0.5-0.6 of ammonium polyphosphate, 0.8-0.9 of urea, 0.6-0.8 of hydroxymethyl starch, 0.2-0.4 of polyethylene oxide, and a proper amount of deionized water. The preparation method provided by the invention is simple, the raw materials are low in cost and have wide sources, the prepared insulating paper has good performance and high stability, and has good use prospect as an insulating part of transformers.

The invention belongs to the technical field of special paper, and particularly relates to high-toughness non-woven coated paper and a preparation method thereof. The high-toughness non-woven coated paper comprises, in weight percent, 50-60% of bleached sulfate hardwood pulp, 30-40% of sulfate softwood pulp, 5-15% of polyester fibers, 2-5% of adhesives and 3-5% of auxiliaries, wherein the auxiliaries are mixture of dry strength agents, wet strength agents, dispersing agents, defoaming agents, ultraviolet absorbents and antioxidants. The high-toughness non-woven coated paper is soft, good in folding endurance, uniform in color, stable and compatible and natural in hand feeling, the materials are more environmentally friendly than PVC (polyvinyl chloride), and the use range of decorative paper is widened. The preparation method is simple in process operation and easy to control, product quality is stable, a large number of manpower and material resources are saved, the production processof products is optimized, product quality is improved, the production requirements of users can be more effectively met, and production technology and technical level reach international advanced level.

A method for treating lignin-containing fibrous material to reduce its susceptibility to yellowing generally includes enzymatically stabilizing the lignin of the material with an oxidizing agent capable of oxidizing phenolic or similar groups, which may undergo reactions conductive to the formation of colored sites on the fibers, and treating the material with a fluorescent whitening agent. Also disclosed are lignin-containing materials obtained by the method.

The invention discloses biological latex used for papermaking and a preparation method thereof, and belongs to the field of coatings. Glutinous rice starch is taken as a raw material, the characteristic that cyanogroup on the surface of the starch is easy to react with organosilane is used, the quantity of surface hydroxyl groups is reduced, the hydrophobic property is strengthened, and the waterresistance after the biological latex is used for paper surface is improved; the starch after hydrophobic modification is added into environmentally-friendly triethyl citrate and glycerol to be mixedfor carrying out plasticized modification, so that the coating performance of a base material is improved, simultaneously, the addition of a part of petroleum base latex can be replaced, the resourcesare saved, and the purpose of environmental protection is achieved; tetraethoxysilane is taken as a raw material, the toughening improvement performance of the latex is improved, the biological latexis unlikely to embrittle after drying, and the mechanical property of the coating is improved; 1,2-benzisothiazoline-3-one and ammonia water are added for forming a conservation activator for the biological latex, so that the performance of the latex is improved, the latex is prevented from losing efficacy, and the biological latex has an anti-aging effect. The biological latex solves the problemthat paper becomes embrittled and low in ink absorbency after the biological latex is used at present.

The invention discloses preparation of a polyimide fiber insulation paper for transformers. The polyimide fiber insulation paper for transformers is prepared from the following raw materials by weight part: 10-12 of nano-titanium dioxide, 2-3 of barium titanate, 2-3 of phenolic resin, 500-550 of a pulp board, 1.3-1.5 of sodium silicate, 1-1.3 of sodium carboxymethyl cellulose, 3-3.5 of polyimide fiber, 2.3-2.6 of polyamic acid resin, 0.4-0.5 of an aqueous wax emulsion, 0.6-0.8 of antimony dioxide, and a proper amount of deionized water. The preparation method provided by the invention has the advantages of simplicity, low cost and wide raw material sources, and the prepared insulating paper has excellent performance, thus being worthy of promotion.

The invention discloses environment-friendly noctilucent anti-mosquito wallpaper. The environment-friendly noctilucent anti-mosquito wallpaper is prepared from, by weight, 20-30 parts of old clothes, 10-20 parts of waste wood, 10-20 parts of straw, 2-5 parts of nano-zinc oxide, 1-2 parts of chitosan, 2-8 parts of sodium sulfide, 10-25 parts of sodium hydroxide, 5-10 parts of cassava starch, 2-5 parts of butyl acrylate, 1-2 parts of a titanate coupling agent, 1-3 parts of cationic polyacrylamide, 1-2 parts of sodium N-cocoyl glycinate, 1-2 parts of azodiisobutyronitrile, 60-100 parts of deionized water, 20-30 parts of ethyl acetate, 3-6 parts of fluorescent powder and 5-10 parts of traditional Chinese medicine powder. According to the environment-friendly noctilucent anti-mosquito wallpaper, the old clothes, the waste wood and the straw are adopted as fiber base materials, resources are effectively utilized, resource waste is avoided, and the environment-friendly effect is achieved; the traditional Chinese medicine powder contained in the wallpaper achieve the killing effect, the fluorescent powder contained in the wallpaper can attract mosquitoes, and through mutual cooperation of the fluorescent powder and the traditional Chinese medicine powder, the mosquito dispelling effect is significant.

The invention discloses a coating agent for fluffed fiber paper of a paper diaper. The coating agent is prepared from starch, waterborne polyurethane and nano-microcrystalline cellulose. A preparation method of the coating agent comprises: stirring the starch with the concentration of 8 percent in a water bath so as to gelatinize the starch; then sequentially adding the waterborne polyurethane and the nano-microcrystalline cellulose, and sufficiently stirring until the materials are uniformly mixed. The coating agent for the fluffed fiber paper of the paper diaper, provided by the invention, has relatively good mechanical properties, water resistance, solvent resistance, anti-ageing performance and reinforcement performance. The strength performance of the fluffed fiber paper of a leftover material absorption layer of the paper diaper is obviously improved, and the recycling utilization rate of fibers is improved.