The invention discloses a high-low acid value bi-component end carboxyl polyester resin composition for super-weather-resisting dry-blending extinction powder coatings, and further discloses application of the high-low acid value bi-component end carboxyl polyester resin composition for the super-weather-resisting dry-blending extinction powder coatings The high-low acid value bi-component end carboxyl polyester resin composition for the super-weather-proof dry-blending extinction powder coatings comprises high acid value end carboxyl polyester resin for super-weather-proof power coatings and low acid value end carboxyl polyester resin for the super-weather-proof power coatings The dry-blending extinction powder coatings are 18-45% in luster, and have good extinction effect and terrific weather-proof property Ultraviolet-light-resisting and accelerated aging time is more than twice of that of conventional weather-resisting-type extinction powder coatings The high-low acid value bi-component end carboxyl polyester resin composition for the super-weather-resisting dry-blending extinction powder coatings can be appropriate for polyester/TGIC and polyester/HAA solidified system powder coatings, and particularly appropriate for polyester/TGIC solidified system powder coatings

High-low acid value bi-component end carboxyl polyester resin composition for super-weather-proof dry-blending extinction powder coatings and application of the same

The invention discloses a preparation method of polyester resin applied to a thermo-sensitive base material powder coating. The preparation method includes three stages, wherein the first stage comprises the steps of: putting a formula amount of alcohol into a reaction kettle, heating, stirring after the alcohol is completely melted, then adding the formula amount of an acid and an esterification catalyst, heating to 170-180 degrees centigrade, then heating to 245-250 degrees centigrade, and maintaining the reaction until reactants are clear; the second stage comprises the steps of: adding the acid, keeping the temperature at 210-220 degrees centigrade until the reactants are clear, sampling and measuring acid value; the third stage comprises the steps of vacuumizing at a vacuum degree from -0.095 to -0.097 MPa for 1.5-2 hours, and measuring the acid value. The invention further discloses application of the polyester resin to the thermo-sensitive base material powder coating. Polyester prepared by the method disclosed by the invention has a good hardness and a good adhesive force to a base material, simultaneously a coating has a good appearance and good chemical resistance, the coating requirement of the thermo-sensitive base material is satisfied, and the smoothness requirement of the thermo-sensitive base material is satisfied as well.

Preparation method and application of polyester resin applied to thermo-sensitive base material powder coating

The invention discloses a method for preparing a polyester resin used in a frostless type powder coating. The method comprises the following three stages: 1, feeding alcohol in the formula amount into a reaction kettle, heating up till the alcohol is completely molten, stirring, further feeding acid and an esterification catalyst in the formula amount, raising the temperature to 170-180 DEG C, further raising the temperature to 245-250 DEG C, and maintaining the acid value to 8-12mgKOH/g; 2, feeding acid, keeping the temperature of 230-240 DEG C till a reactant is clear, sampling, measuring the acid value to be 43-47mgKOH/g; 3, vacuuming for 1.5-2 hours till the vacuum degree ranges from -0.095MPa to -0.097MPa, and measuring the acid value. When applied to the powder coating, the polyester prepared by using the method reduces or even avoids the frost phenomenon in comparison with an ordinary polyester powder coating; good leveling property and shock resistance are also maintained and the mechanical property is good.

Method for preparing polyester resin used in frostless type powder coating

The invention relates to a 6:4 type polyester resin with good water boiling resistance and a preparation method thereof. The 6:4 type polyester resin is characterized by comprising the following components in percentage by weight: 25-45% of polyhydric alcohol, 40-60% of aromatic polybasic acid, 0-10% of aliphatic dibasic acid, 0-5% of branching agent, 5-12% of acidolysis agent, 0.01-0.1% of esterification catalyst, 0.01-0.1% of antioxidant and 0.05-0.3% of liquid curing accelerator. The 6:4 type polyester resin provided by the invention has the advantages of higher glass transition temperature softening point, good storage stability, appropriate melting viscosity, excellent water boiling resistance and impact resistance and good leveling property and water boiling resistance.

6:4 type polyester resin with good water boiling resistance and preparation method thereof

The invention discloses plastic powder releasing negative ions. The powder contains the following components in parts by weight: 20-50 parts of polyester resin, 20-50 parts of epoxy resin, 15-45 parts of titanium dioxide, 5-15 parts of filler, 1-5 parts of auxiliaries and 0.5-10 parts of negative ion additive. A manufacturing method of the negative ion powder is performed according to the following steps of: a) adding 20-50 parts of polyester resin, 20-50 parts of epoxy resin, 15-45 parts of titanium dioxide, 5-15 parts of filler, 1-5 parts of auxiliaries and 0.5-10 parts of negative ion additive into a stirrer and uniformly mixing; b) placing the mixed raw materials which are uniformly stirred into an extrusion machine together, and performing hot extrusion at the temperature of 80-100 DEG C; and c) crushing a mixed negative ion material which is molded by extrusion, and screening by a 200-mesh screen. The plastic powder releasing the negative ions, disclosed by the invention, has the advantages of cleanness, full-automatic spray-coating, easiness in recovery and the like, can be used for quickly manufacturing negative ion household electrical appliances, automobiles and other devices, and can improve the housing and living environment and simultaneously realize the function of preventing the living of bacteria and mildew. The manufacturing method disclosed by the invention is simple, and the process is easy to operate.

Plastic powder releasing negative ions and manufacturing method thereof

The invention relates to a preparation method of polyester resin capable of being used for an outdoor dry mixed extinction powder coating. The preparation method is characterized by comprising the following steps of: adding polybasic acid or anhydride, polyatomic alcohol, a catalyst and an antioxidant according to a mass ratio into a reaction kettle for mixing; introducing nitrogen; heating to a temperature of 100-300 DEG C until a reaction solution is completely clarified to obtain A-component polyester resin; adding polybasic acid or anhydride, polyatomic alcohol, a catalyst and an antioxidant into the reaction kettle to be mixed; introducing nitrogen; heating to a temperature of 100-300 DEG C until a reaction solution is completely clarified; and carrying out vacuum condensation polymerization on the clarified reaction solution until an acid value is 10-50 mg KOH/g and a viscosity is 30-100 P to obtain B-component polyester resin; mixing the A-component polyester resin with triglycidyl isocyanurate, barium sulfate, titanium dioxide, a flatting agent, a brightener and benzoin according to a mass ratio to obtain a powder coating I; mixing the B-component polyester resin with triglycidyl isocyanurate, barium sulfate, titanium dioxide, a flatting agent, a brightener and benzoin to obtain a powder coating II; and mixing the powder coating I with the powder coating II to obtain the powder coating with low brightness. The preparation method has the advantages of stable extinction effect of outdoor dry mixed extinction polyester, better coating property and the like.

Preparation method of polyester resin capable of being used for outdoor dry mixed extinction powder coating

The invention relates to polyester resin for low-temperature cured powder paint and a preparation method of the polyester resin. The polyester resin is characterized by comprising the following ingredients in percentage by mass: 0 to 10 percent of ethylene glycol, 10 to 40 percent of neopentyl glycol, 0 to 8 percent of 1,6-ethylene glycol, 0 to 5 percent of 1,4-cyclohexanedimethanol, 20 to 60 percent of terephthalic acids, 2 to 15 percent of adipic acid, 0.05 to 0.2 percent of monobutyltin oxide, 0.02 to 0.15 percent of triphenyl phosphate, 0 to 5 percent of adipic acid, 2 to 40 percent of m-phthalic acid and 0 to 5 percent of methacrylic acid. The polyester resin and the preparation method have the advantages that the curing at the low temperature condition of 130 DEG C to 140 DEG C can be realized, in addition, the storage stability is good, and the like.

Polyester resin for low-temperature cured powder paint and preparation method of polyester resin

The invention relates to a UV (ultraviolet) light dual-curing powder paint and a preparation method thereof. The powder paint is characterized by comprising the following components in percentage by mass: 91-93% of epoxy acrylic resin, 3-5% of cation photoinitiator and 3-5% of free radical photoinitiator. The powder paint contains dual-curing groups; vinyl group is introduced into the resin containing epoxy group, so that the resin can implement low-temperature ultraviolet dual-curing, thereby shortening the curing time; the powder paint has excellent curing property and improved mechanical properties; and the production method is simple and easy to operate.

UV (ultraviolet) light dual-curing powder paint and preparation method thereof

The invention relates to a method for preparing leather by using an aqueous wet method, which is characterized by comprising the following steps: selecting a base material, wherein the base material is coated with an aqueous polyurethane emulsion containing 20 to 45 percent anionic waterborne polyurethane emulsion; after coating the anionic waterborne polyurethane emulsion evenly, adding the base material into a prepared acid bath field to perform agglomeration; standing the base material for 2 to 30 minutes, and taking the well agglomerated base material out; and air-drying the base material until the moisture content is completely volatilized to prepare a qualified aqueous wet-method leather coating layer. The acid bath field is prepared by adding an acidic material into deionized water, controlling the acid concentration between 1 and 50 percent, and stirring the mixture evenly for later use; and when in use, along with the descending of the acid value, the stable acid concentration of the acid bath field can be controlled by adding acid into the acid bath field. By adopting the method, the prepared wet-method leather is pollution-free, the acid bath can be used repeatedly, and the financial resources are saved.

Method for preparing leather by aqueous wet method

The invention relates to a polyester resin for an outdoor aluminum profile heat transfer printing powder coating and a preparation method thereof. The polyester resin is characterized by comprising 10-40 percent of neopentyl glycol, 0-10 percent of 2-butyl-2-ethyl-1,3-propylene glycol, 0-10 percent of 1,4-cyclohexanedimethanol, 20-60 percent of terephthalic acid, 0-16 percent of adipic acid, 0.05-0.2 percent of butyltin oxide, 0.02-0.15 percent of triphenyl phosphate, 0-5 percent of trimellitic anhydride, 0-20 percent of m-phthalic acid and 0-5 percent of curing accelerator. The polyester resin can be completely cured under the temperature of about 200 DEG C, the cured coating has high definition of the heat transfer printing pattern, the color is bright, the paper is easily torn, and glue water residue is avoided after paper tearing. In addition, the coating also has high gloss, excellent leveling property, high mechanical strength and excellent weather resistance.

Yongyi Cao

Papers

Preparation method of polyester resin capable of being used for outdoor dry mixed extinction powder coating

Polyester resin for low-temperature cured powder paint and preparation method of polyester resin

UV (ultraviolet) light dual-curing powder paint and preparation method thereof

Method for preparing leather by aqueous wet method

Polyester resin for outdoor aluminum profile heat transfer printing powder coating and preparation method thereof