Method for preparing aqueous acrylic acid modified alkyd resin coating
A water-based acrylic and alkyd resin technology, applied in polyester coatings, coatings, etc., can solve the problems of low conversion rate of modified monomers, reduce coating stability, reduce double bond content, etc., and achieve significant economic benefits and social benefits benefit, improve water solubility, and shorten reaction time
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Embodiment 1
[0027] (1) Preparation of acrylic acid modified monomer copolymer: add 5.88g of maleic anhydride and 50mL of organic solvent xylene in the reaction kettle, pass in nitrogen, stir mechanically, heat up to 100°C, and dissolve 35.2g of methacrylic acid The mixture of isobutyl ester and 1.06g benzoyl peroxide was dripped into the reaction kettle within 2 hours under reflux state, and kept warm for 4 hours to obtain the acrylic acid modified monomer copolymer, and its infrared spectrum is shown in the accompanying drawing figure 1 . Through the determination of solid content, it was confirmed that the monomer conversion rate was 97.69%.
[0028] (2) Preparation of monoglycerides: Add 44.0 g of dehydrated castor oil, 13.4 g of trimethylolpropane and 0.05 g of sodium hydroxide into the reaction kettle, stir mechanically, raise the temperature to 90° C., keep warm and vacuumize for 1 hour to remove water, Nitrogen was passed, and the temperature was raised to 230°C for alcoholysis re...
Embodiment 2
[0033] (1) Preparation of acrylic acid modified monomer copolymer: add 5.88g of maleic anhydride and 50mL of organic solvent xylene in the reaction kettle, feed nitrogen, stir mechanically, heat up to 100°C, and dissolve 26.4g of methacrylic acid The mixture of isobutyl ester and 0.79g benzoyl peroxide was dripped into the reaction kettle within 3 hours under reflux state, and was incubated for 3 hours.
[0034] (2) Preparation of monoglycerides: Add 22.0g dehydrated castor oil, 22.1g soybean oil, 13.4g trimethylolpropane and 0.05g sodium hydroxide into the reaction kettle, stir mechanically, heat up to 90°C, keep warm and vacuumize to remove water After 1 hour, nitrogen was blown, and the temperature was raised to 230° C. to carry out the alcoholysis reaction until reaching the end point of alcoholysis.
[0035] (3) prepare acrylic acid modified alkyd resin: the xylene solution of the acrylic acid modified monomer copolymer that step (1) makes is with the monoglyceride that s...
Embodiment 3
[0039] (1) Preparation of acrylic acid modified monomer copolymer: add 5.88g of maleic anhydride and 50mL of organic solvent xylene in the reaction kettle, feed nitrogen, stir mechanically, heat up to 100°C, and dissolve 12.5g of methacrylic acid The mixture of isobutyl ester, 12.5g of n-butyl methacrylate and 0.75g of benzoyl peroxide was dripped into the reaction kettle within 2 hours under reflux, and kept warm for 3 hours.
[0040] (2) Preparation of monoglycerides: add 44.2g soybean oil, 13.4g trimethylolpropane and 0.05g sodium hydroxide into the reaction kettle, stir mechanically, heat up to 90°C, keep warm and vacuumize to remove water for 1 hour, then pass nitrogen , the temperature was raised to 230°C to carry out the alcoholysis reaction until reaching the end point of alcoholysis.
[0041] (3) prepare acrylic acid modified alkyd resin: the xylene solution of the acrylic acid modified monomer copolymer that step (1) makes is with the monoglyceride that step (2) make...
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