48results about How to "Suitable glass transition temperature" patented technology

The invention discloses a low-temperature cured terminal carboxyl polyester resin for mixed powder coating. The polyester resin is prepared by performing melt polycondensation reaction on the following components in percentage by weight: 25 to 45 percent of polyalcohol, 35 to 65 percent of aromatic polyatomic acid, 0 to 10 percent of fat polyatomic acid, 0 to 2 percent of branching agent, 6 to 15 percent of acid hydrolysis agent, and 0.01 to 0.15 percent of esterification catalyst. The invention also discloses a method for preparing the low-temperature cured terminal carboxyl polyester resin. The prepared polyester resin has the characteristics of proper glass-transition temperature, softening point, good storage stability, and the like; the polyester resin, epoxy resin, filler and assistant in a certain proportion are mixed, and the mixture is prepared into powder through melt extrusion mixing, cooling, crushing and sieving; and the prepared powder can be cured at the temperature of 160 DEG C, and has the advantages of excellent leveling performance, good impact performance, and the like.

The invention discloses a mixed polyester resin for matte powder coating, which is obtained through the melting polycondensation by using the components with the following weight fraction: 23 percent to 50 percent of polyol, 35 percent to 65 percent of aromatic polybasic acid, 0 percent to 10 percent of fat polybasic acid, 0 percent to 2 percent of branching agent, 10 percent to 20 percent of acidulate agent and 0.01 percent to 0.15 percent of esterification catalyst. The invention also discloses a preparation method for a mixed polyester resin for matte powder coating. The polyester resin prepared through the method of the invention has the advantages of proper glass transition temperature,softening temperature, good storage stability, low cost, etc., and the matte powder coating with a gloss lower than 30 percent can be obtained by mixing the polyester resin with a certain proportion of the epoxy resin,stuffing, paint, flatting agent and matting agent and then melting, extruding, grinding and cribrating the mixtures and the obtained polyester resin has an outstanding mechanical performance and flatting effect.

The invention provides an ultra-weatherproof carboxyl-terminated fluorine-containing polyester resin for a powder coating and a preparation method of the ultra-weatherproof carboxyl-terminated fluorine-containing polyester resin. The acid value of the fluorine-containing polyester resin prepared in the method is 23 to 35 mg KOH in every gram of resin, the hydroxyl value is smaller than 10 mg KOH in every gram of resin, the glass-transition temperature is 55 to 75 DEG C, the melt viscosity is 2000 to 22000 mPa.s per 200 DEG C, the number-average molecular weight is 2500 to 8000, and the fluorine content is 1% to 5% continuously adjustable. The ultra-weatherproof carboxyl-terminated fluorine-containing polyester resin has the advantages of appropriate glass-transition temperature, simple resin synthetic process, low cost and the like, and the powder coating prepared through curing of triglycidyl isocyanurate or hydroxyl alkyl amide has the advantages of ultra-weatherproof performance, high glossiness, excellent leveling, high impact property and the like.

The invention provides a high-gloss, impact resistant and super weather-resistant carboxyl terminated fluorine-containing polyester resin for a powder coating and a preparation method thereof. Compared with the prior art, the fluorine-containing polyester resin prepared by the preparation method is a resin with acid value of 23-35 mgKOH / g, hydroxyl value of less than 10 mgKOH / g, glass-transition temperature of 55-75 degrees centigrade, melt viscosity of 2000-22000 mPa.s / 200 degrees centigrade and number-average molecular weight of 2500-8000. The high-gloss, impact resistant and super weather-resistant carboxyl terminated fluorine-containing polyester resin for the powder coating has the advantages of appropriate glass-transition temperature, storage stability, simple resin synthetic process, low resin cost and so on. The powder coating, which is prepared by curing the high-gloss, impact resistant and super weather-resistant carboxyl terminated fluorine-containing polyester resin for the powder coating together with triglycidyl isocyanurate or hydroxyl alkyl amide, has the advantages of super weather resistance, high gloss, superior levelling, excellent impact resistance and so on.

The invention discloses water boiling-resistant high-color fastness polyester resin for a TGIC powder coating. The water boiling-resistant high-color fastness polyester resin is prepared from 25 to 45% by weight of polyhydric alcohol, 40 to 60% by weight of polybasic acid, 5 to 15% by weight of a chain extender, 0.01 to 0.15% by weight of a catalyst and 0.05 to 2% by weight of a water boiling-resistant assistant through a melt phase polycondensation reaction. The invention also discloses a preparation method of the water boiling-resistant high-color fastness polyester resin for a TGIC powder coating. The polyester resin is TGIC gel-type resin, has good weatherability, has a moderate glass transition temperature and viscosity, has excellent resistance to water boiling and mechanical properties in an outdoor or humid environment and prevents coating fading after long-term use.

The present invention relates to a material for preparing an intraocular lens. In particular, it relates to an ophthalmic medical material suitable for manufacture of micro-incision intraocular lens, having suitable water content and a suitable refractive index.

The invention belongs to the technical field of brick gum, and discloses quick-drying high-flexibility vitrified brick gum and a preparation method thereof. The vitrified brick gum comprises a liquid material component and a powder material component. On the basis of the total weight of the powder material component, the powder material component comprises the following components by weight: superfine Portland cement, aggregate, a water-retention thickening agent, an early strength agent and light calcium carbonate; and on the basis of the total weight of the liquid material component, the liquid material component comprises the following components by weight: styrene-butadiene latex, a mildew preventive, a defoaming agent, a sterilizing agent and water. The water-retention thickening agent is a mixture of a cellulose ether compound, xanthan gum and sepiolite. After being brushed, the gum can be quickly formed into a film and dried, so that the construction efficiency is improved, the bonding strength is ensured, and the gum has good flexibility.

The invention relates to a transparent solid leveling agent which comprises the following raw materials in parts by weight: 4 to 14 parts of an initiator, 50 to 1,200 parts of a hard monomer, 0 to 450 parts of a functional monomer and 1 to 18 parts of a molecular weight regulator. The raw materials of the leveling agent do not contain any soft monomer; the leveling agent has extremely low surface tension and proper glass transition temperature, and is in a transparent solid state for a powder coating at normal temperature; a thermosetting powder coating prepared by compounding the leveling agent and another material is high in leveling performance, surface hardness, glossiness, durability and decoration performance; the leveling agent can be used for an indoor or outdoor metal section or building material, and is particularly suitable to be used as a special leveling agent for an optical coating of a transparent cover.

The invention provides a graphene oxide reinforced waterproof polymer emulsion preparation method, wherein 1000 parts of the graphene oxide reinforced waterproof polymer emulsion comprise the following raw materials: 3.3-5.5 parts of an amide hydrophilic small monomer for emulsification, 6.5-15.0 parts of an alkyl hydrophobic small monomer for emulsification, 0.12-0.35 part of an emulsion initiator a, 0.24-0.56 part of a chain transfer agent, 8.3-13.5 parts of an amide hydrophilic small monomer, 35-46 parts of a flexible small monomer, 23-32 parts of an ether polymer, 2.5-6.0 parts of an initiator b, 200-280 parts of an alkyl hydrophobic small monomer, 100-160 parts of an acrylate-based hard monomer, 2.6-7.5 parts of a cross-linking agent, 1.2-2.6 parts of a neutralizer, 2.3-4.0 parts of apH regulator, 0.64-1.35 parts of a functional monomer, and the balance of deionized water. According to the invention, the polymer emulsion with advantages of good stability, strong adhesion, excellent tensile strength, excellent wear resistance and excellent water resistance is synthesized by using the amide-based strong hydrophilic monomer and the long alkyl chain hydrophobic monomer as the rawmaterials through dispersion pre-emulsification, constant-temperature polymerization, variable-speed stirring, pH adjustment and a series of processes, wherein the amide molecules can enhance the adhesion of the polymer, and the tensile strength, the water resistance and the wear resistance of the film formed by the emulsion are remarkably enhanced by graphene oxide.

The invention discloses a low-temperature cured terminal carboxyl polyester resin for mixed powder coating. The polyester resin is prepared by performing melt polycondensation reaction on the following components in percentage by weight: 25 to 45 percent of polyalcohol, 35 to 65 percent of aromatic polyatomic acid, 0 to 10 percent of fat polyatomic acid, 0 to 2 percent of branching agent, 6 to 15 percent of acid hydrolysis agent, and 0.01 to 0.15 percent of esterification catalyst. The invention also discloses a method for preparing the low-temperature cured terminal carboxyl polyester resin. The prepared polyester resin has the characteristics of proper glass-transition temperature, softening point, good storage stability, and the like; the polyester resin, epoxy resin, filler and assistant in a certain proportion are mixed, and the mixture is prepared into powder through melt extrusion mixing, cooling, crushing and sieving; and the prepared powder can be cured at the temperature of 160 DEG C, and has the advantages of excellent leveling performance, good impact performance, and the like.

The invention provides triglycidyl-isocyanurate-cured carboxyl-terminated saturated polyester resin for thermal transfer printing powder coating and a synthesizing method of the triglycidyl-isocyanurate-cured carboxyl-terminated saturated polyester resin. The triglycidyl-isocyanurate-cured carboxyl-terminated saturated polyester resin is prepared by 30-45wt% of polyol, 43-55wt% of aromatic polyacid, 0.01-3wt% of branching agent, 8-18wt% of acidolysis agent, 0.03-0.15wt% of esterification catalyst, 0.01-2wt% of antioxidant and 0.01-1wt% of curing accelerator through melt polycondensation. The triglycidyl-isocyanurate-cured carboxyl-terminated saturated polyester is appropriate in glass-transition temperature and storage stability, simple in synthesizing process, low in cost and the like. The components of the triglycidyl-isocyanurate-cured carboxyl-terminated saturated polyester resin satisfy the requirements on polyester resin for powder coating in GB / T 5237.4-2008 Wrought Aluminum Alloy Extruded Profiles for Architecture-Part 4: Powder Coating Profiles, and the resin is applicable to the field of thermal transfer printing powder coating.

The invention discloses a polyester resin for a TGIC cured high-toughness powder coating. The polyester resin is obtained by a melting condensation polymerization reaction of the following raw materials in percentage by weight: 32-40% of a dihydric alcohol, 52-60% of an aromatic dibasic acid, 0.4-1.6% of a polyhydric alcohol, 2-8% of a fatty dibasic acid, and 0.01-0.15% of an esterification catalyst. The invention also discloses a preparation method of the polyester resin. The prepared polyester resin has an appropriate glass transition temperature, is suitable for a TGIC curing system; and a coating layer of the prepared powder coating has excellent flexibility, and also has excellent mechanical properties under conditions of the room temperature and the low temperature of about -10 DEG C.

The invention discloses mixed polyester resin for an indoor thermal transfer printing matt powder coating. The resin is carboxyl-terminated saturated polyester resin, and has an acid value of 45-75 mgKOH / g, a glass transition temperature of 55-60 DEG C, a softening point of 93-103 DEG C, a melt viscosity of 3000-4500 mPa*s at 200 DEG C and reactivity of 150-250 s at 180 DEG C, and the resin is mainly prepared by performing a melt polycondensation reaction on the following monomer components in percent by mass: 30-37% of a diol, 0-3% of a trihydric alcohol, 55-62% of an aromatic dibasic acid,0-5% of a fatty acid, 5-10% of an acidolysis agent, 0.01-0.15% of an esterifying catalyst and 0.01-0.8% of a thermal transfer printing assistant. The polyester resin has a high glass transition temperature, good storage stability, and a good appearance levelling property. The invention also discloses a preparation method of the mixed polyester resin for the indoor thermal transfer printing matt powder coating.

The invention provides a high-gloss, impact resistant and super weather-resistant carboxyl terminated fluorine-containing polyester resin for a powder coating and a preparation method thereof. Compared with the prior art, the fluorine-containing polyester resin prepared by the preparation method is a resin with acid value of 23-35 mgKOH / g, hydroxyl value of less than 10 mgKOH / g, glass-transition temperature of 55-75 degrees centigrade, melt viscosity of 2000-22000 mPa.s / 200 degrees centigrade and number-average molecular weight of 2500-8000. The high-gloss, impact resistant and super weather-resistant carboxyl terminated fluorine-containing polyester resin for the powder coating has the advantages of appropriate glass-transition temperature, storage stability, simple resin synthetic process, low resin cost and so on. The powder coating, which is prepared by curing the high-gloss, impact resistant and super weather-resistant carboxyl terminated fluorine-containing polyester resin for the powder coating together with triglycidyl isocyanurate or hydroxyl alkyl amide, has the advantages of super weather resistance, high gloss, superior levelling, excellent impact resistance and so on.

The present invention relates to a material for preparing an intraocular lens. In particular, it relates to an ophthalmic medical material suitable for manufacture of micro-incision intraocular lens, having suitable water content and a suitable refractive index.