122 results about "Polybutylene adipate co-terephthalate" patented technology

The invention relates to a material capable of completely biodegrading, containing the following parts by weight:100 of polyester resin, 5-100 of polylactic resin and the multipolymer thereof, 10-80 of compounding converted starch, 10-60 of inorganic fillers and 0.1-0.9 of resin acceptor, wherein the polyester resin is at least one of polybutylene succinate resin, polybutylene adipate resin and the multipolymer thereof. The invention also provides a preparation method of the material. The material capable of completely biodegrading can combine the advantages of each component and has high intensity, modules, elongation at break and toughness, good heat resistance, and the like, thereby meeting the property requirements of a plurality of plastic products in the market and in particular products, such as non-returnable containers, mess kits, agricultural films, and the like, which cause serious white pollution, retaining the complete biodegradability of the material and reducing the production cost under the precondition of no influence on the property requirement.

The invention belongs to the technical field of macromolecular materials, and in particular relates to a preparation method for biodegradable blocked copolyester. The preparation method comprises the following steps: carrying out esterification reaction between adipate and 1,4 butanediol in the presence of catalyst, wherein the reaction time is 3 to 5h, nitrogen is adopted for protection, the reaction pressure is between 0.1 and 0.8MPa and the reaction temperature is between 130 and 180 DEG C during a first stage; and the reaction time is 1.5 to 5h, the reaction pressure is between 0.3 and 0.6MPa and the reaction temperature is between 150 and 200 DEG C during a second stage so as to generate polybutylene adipate; and carrying out ester exchange reaction of dimethyl terephthalate (DMT) and 1,4 butanediol in the presence of catalyst, wherein the nitrogen is adopted for protection, the reaction time is 2 to 5h, the reaction pressure is between 0.1 and 0.7MPa and the reaction temperature is between 150 and 170 DEG C so as to generate polybutylene terephthalate (pbt); and mixing both prepolymers and carrying out melt copolycondensation reaction under negative pressure, wherein the vacuum degree is controlled to be between 0 and 200Pa, the reaction temperature is between 210 and 260 DEG C and the reaction time is 3 to 8h. The preparation method carries out esterification reaction and ester exchange reaction, and the esterification reaction has two stages so as to effectively reduce secondary reaction of 1,4 butanediol. A prepared product has a characteristic viscosity number above 1.2dl/g, a melting point controlled between 100 and 140 DEG C, a tensile strength between 18 and 37MPa and a breaking elongation ratio from 800 to 1,500 percent.

The invention relates to a method for preparing biodegradable polyester. Firstly, melt polycondensation is conducted through diol and dicarboxylic acid and a low molecular weight polyester prepolymer with number average molecular weight between 2, 000 and 20, 000 or intrinsic viscosity below 0.64dL/g is prepared; binary oxadiazoline and diacyl bis-caprolactamate are combined to extend chain, and chain extension is carried out at a certain temperature; and the biodegradable polyester is obtained. The number average molecular weight of polybutylene adipate (PBA) can reach up to 39, 000 and the intrinsic viscosity to 1.13dL/g. For poly (butylene succinate) (PBS) with relatively high melting point, the intrinsic viscosity after chain extension is up to 0.99dL/g.

Disclosed is a biodegradable resin composition containing at least one biodegradable organic high molecular compound, a flame retardant additive containing a phosphorus-containing compound, and a hydrolysis suppressing agent suppressing the hydrolysis of the at least one biodegradable organic high molecular compound. An aliphatic polyester resin is polylactic acid, polycaprolactone, polyhydroxy lactic acid, polyhydroxy valeric acid, polyethylene succinate, polybutylene succinate, polybutylene adipate, polymalic acid, polyesters synthesized by fermentation, or a copolymer containing at least one of them. A polysaccharide is cellulose, starch, chitin, chitosan, dextrane, a derivative of at least one of them, or a copolymer containing at least one of them.

A biodegradable three-element copolymer with high mechanical and thermal performance is prepared from the raw material used for synthesizing butanediol polysuccinate, the raw material used for synthesizing ethanediol polysuccinate, hexanediol polysuccinate, etc, and the raw materialused for synthesizing ethanediol polyterephthalate, etc through atactic copolymerizing.

The invention relates to a waterborne polyurethane emulsion, a coating and a preparation method and application of the waterborne polyurethane emulsion. The waterborne polyurethane emulsion is mainlyprepared from the following components (by mass): polyols, isocyanate, a catalyst, a hydrophilic chain extender, an end-capping reagent, a neutralizer and water, wherein the polyols comprise a polyolA and a polyol B; the polyol A is carbon dioxide copolymer polyol, and the polyol B is at least one of polycarbonate diol, polybutylene adipate diol and polytetrahydrofuran diol. The preparation method comprises the following steps: mixing polyol A and polyol B for use; and matching isocyanate, a catalyst, a hydrophilic chain extender, an end-capping reagent, a neutralizer and water and controlling the mass parts of all the components. Thereby, the microphase separation of the waterborne polyurethane emulsion and the interaction between hydrogen bonds can be improved, and the waterborne polyurethane has good stability, water resistance and chemical reagent corrosion resistance.

The invention provides a full-biodegradable plastic mulching film, a preparation method and application thereof. The full-biodegradable plastic mulching film comprises the following components in parts by weight: 100 parts of a full-biodegradable resin, 10-30 parts of an auxiliary agent, 10-60 parts of modified starch and 10-100 parts of modified calcium carbonate, wherein the full-biodegradable resin is prepared from one or more of poly (butylene succinate) (PBS), polylactic acid (PLA), polyhydroxyalkanoate (PHA), poly (butylene adipate-butylene terephthalate) (PBAT) and polypropylene carbonate (PPC). According to the biodegradable mulching film, the contradiction that crops need longer service life of the mulching film and lower thickness of the mulching film and the requirement on the lowest thickness of a polyethylene plastic mulching film can be solved, and the technical scheme of the biodegradable mulching film also has the effects of slow degradation in the early stage, strong protection capability and accelerated degradation in the later stage, so that the influence of the biodegradable mulching film on the planting of succeeding crops is reduced.

The invention is concerned with the pesticides microcapsule, which the material of the wall is the fat group polyester macromolecule and can be biodegradation; it is made of the method that latex solvent volatilization - condensing. The main material of the microcapsule is the poly butane diacid dibastic alcohol ester and the copolyester with better degradation feature and film-forming feature, or poly hexane diacid butanediol butylenes glycol ester, the cost of the shell is lower, the preparing technics is simple.

The invention discloses a fabrication method of a track damping base plate, including the following steps: subjecting 1,4-butanediol, 4,4'-diphenylmethane diisocyanate and polybutylene adipate to reaction to obtain thermoplastic polyurethane (TPU) and simultaneously adding assistant and foaming agent that is guaranteed to account for 0.01-80% of the total quantity; and then putting the mixture to reaction by means of pouring, injection molding, rolling and the like at 50-350 DEG C to obtain the damping base plate. By overcoming various defects of PVC (polyvinyl chloride) and Pu (polyurethane), TPU owns not only most characteristics of rubber and common plastic, but also excellent comprehensive physical and chemical property. Therefore, the damping base plate formed by TPU, the foaming agent and the assistant has the characteristic of resistance to water, low temperature and ageing, and can naturally degrade when buried underground, causing no harm or toxin to the nature.

The invention discloses a heat resistant waterproof high strength polyurethane adhesive and a preparing method thereof. The heat resistant waterproof high strength polyurethane adhesive is prepared from a main component and an improver component with a mass ratio of (10 to 15):1. The synthetic raw materials of the main component comprise poly ethylene succinate, poly hexanediol adipate, castor oil-modified polyhydric alcohol H-1823, castor oil-modified polyhydric alcohol H-52, castor oil-modified polyhydric alcohol AC-006, isocyanate a and the like; synthetic raw materials of the improver component comprise: chain extender b, isocyanate b and ethyl acetate. The polyurethane adhesive has very good initial adhesive force, higher peel strength and temperature resistant performance due to the two kinds of high crystallinity polyester polyols and an addition proportion thereof, and the waterproofness of the polyurethane adhesive is improved due to the addition of the castor oil-modified polyhydric alcohols. The heat resistant waterproof high strength polyurethane adhesive is particularly suitable for offshore equipment such as a rubber dinghy; the preparing method has less procedures, the steps are easy to operate and convenience for industrialized production is realized.

The invention relates to waterborne polyurethane, a preparation method thereof, a waterborne polyurethane automotive interior adhesive and a preparation method thereof, and belongs to the field of waterborne adhesives. The technical problem that existing waterborne polyurethane is poor in water resistence and poor in mechanical property is solved. The waterborne polyurethane comprises polycaprolactone polyol and poly ethylene succinate polyol besides poly(carbonic ester-ether)polyol. The invention further provides a waterborne polyurethane automotive interior adhesive which is prepared from waterborne polyurethane, a waterborne thickening agent, a waterborne defoaming agent, a waterborne dispersing agent, AMP-95, talcum powder, titanium dioxide, fumed silica and a water waterborne curing agent. The invention further provides a preparation method of the waterborne polyurethane automotive interior adhesive. The release force of a glue film of the prepared waterborne polyurethane automotive interior adhesive is 368 N/cm-405 N/cm, and the release force is 327 N/cm-385 N/cm after one cycle; after four cycles of high-low temperature impact and damp and hot weather resistance tests are carried out, the glue film is not warped or unglued, and the release force is 290 N/cm-348 N/cm.

A biodegradable resin composition comprising at least one biodegradable organic polymeric compound, a flame retardant additive containing a phosphorous compound, and a hydrolysis inhibitor capable of inhibiting the hydrolysis of at least one organic polymeric compound. As an aliphatic polyester resin, use is made of polylactic acid, polycaprolactone, polyhydroxybutyric acid, polyhydroxyvaleric acid, polyethylene succinate, polybutylene succinate, polybutylene adipate, polymalic acid, microbially synthesized polyester or a copolymer containing at least one of these. As a polysaccharide, use is made of cellulose, starch, chitin, chitosan, dextran, a derivative of any of these or a copolymer containing at least one of these.

The invention provides a reflective material for protecting electric power facilities and a preparation method of the reflective material. The reflective material comprises poly ethylene succinate, trimethylolpropane, 1, 6-hexamethylene diisocyanate, silicon carbide powder, ethyl orthosilicate, lecithin, polystyrene, polyamide resin, ethylene propylene diene monomer, glyoxal, nanometer titania, compatilizers, terpilenol, antioxidants, cellulose and coco fatty acid diethanol amide. The preparation method includes the steps: firstly preparing elastomer by the poly ethylene succinate, the trimethylolpropane, the 1, 6-hexamethylene diisocyanate, the silicon carbide powder and the ethyl orthosilicate, and then mixing the elastomer with the lecithin to obtain yellow-resistant powder; finally, mixing remaining components with the yellow-resistant powder, adding mixture into a double-screw extruder for extrusion, and pelleting and cooling the mixture to obtain the reflective material. The reflective material for protecting the electric power facilities has excellent mechanical property and heat resistance, is not easy to yellow and good in reflective effect, and can still keep good reflective effect after long-time use.

The invention discloses polyurethane modified epoxy resin. The polyurethane modified epoxy resin is prepared from the following raw materials by weight percent: 20-30% of epoxy resin, 15-20% of toluene diisocynate, 3-6% of polybutylene adipate, 5-10% of polyether polyol, 2-5% of dimethylolpropionic acid, 0.5-1.5% of dibutyltin dilaurate, 4-8% of cyclohexanedimethanol, 3-7% of propylene glycol monomethyl ether acetate, 3-7% of triethylamine and 15-25% of butanone. The invention further discloses a preparation method of the polyurethane modified epoxy resin and an electrophoretic coating prepared from the polyurethane modified epoxy resin. The weatherability, the corrosion resistance and the glossiness of the water-borne epoxy resin electrophoretic coating are improved.