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A kind of preparation method of self-dulling resin

A self-extinction and resin technology, applied in coatings, polyurea/polyurethane coatings, etc., can solve the problems of material aging resistance, poor medium resistance, poor mechanical strength of coating films, etc., and achieve low preparation costs and synthesis The method is simple and the price is cheap

Active Publication Date: 2018-12-21
中昊北方涂料工业研究设计院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has problems such as poor dispersion effect during the matting process, increased viscosity of the system, and easy formation of various lines during the matting process, and the final coating film has problems such as poor mechanical strength and poor medium resistance.
In addition, the use of matting agents will cause the aging resistance of materials to decline to a certain extent.
[0004] Chinese patent CN103725178A discloses a method for synthesizing polyurethane matting varnish, in which powders with extremely small particle sizes such as silicone matting powder and wax powder are added, and a large amount of inhalable particulate matter is produced during the synthesis process, which causes damage to production personnel. greatly endangered

Method used

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  • A kind of preparation method of self-dulling resin
  • A kind of preparation method of self-dulling resin
  • A kind of preparation method of self-dulling resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A. Add 70g of ethanol and 80g of deionized water to the reaction flask, adjust the pH to 9-11 with 10g of ammonia water, raise the temperature to 50°C under the protection of nitrogen, and start adding 17g of 3-(methacryloyloxy)propylmethyl dropwise The mixture of dimethoxysilane, 15g of tetraethyl orthosilicate and 74g of xylene was added dropwise for 1 hour, then kept for 1 hour, cooled, and discharged for later use.

[0032] B. Mix 266g of double bond-containing silica sol and 100g of butyl acetate in the reaction flask to obtain the reaction product obtained in step A; under the condition of nitrogen protection, reflux to remove the water and ethanol in step A, and then drip at 85°C Add a mixture containing 32g of butyl acrylate, 16g of methyl methacrylate resin, 32g of 2-hydroxypropyl methacrylate, and 2g of benzoyl peroxide, drop it in 2.5 to 3 hours, and keep it warm for 2 hours; Benzoyl 0.15g, another initiator benzoyl peroxide 0.15g was added after 1 hour of he...

Embodiment 2

[0034] A. Add 90g of ethanol and 120g of deionized water to the reaction flask, adjust the pH to 9-11 with 11g of ammonia water, raise the temperature to 50°C under the protection of nitrogen, and start adding 10g of 3-(methacryloyloxy)propylmethyl dropwise Dimethoxysilane, 5g of γ-methacryloxypropyltrimethoxysilane, 16g of tetraethyl orthosilicate and 90g of xylene are added dropwise for 5 hours, then kept for 3 hours, cooled, and discharged for later use.

[0035] B. Mix 342g of double bond-containing silica sol and 70g of xylene as the reaction product obtained in step A evenly in a reaction flask; under nitrogen protection conditions, reflux to remove water and ethanol in step A, and then add A mixture containing 27g of styrene, 19g of lauryl methacrylate, 24g of 2-hydroxyethyl acrylate, and 2.4g of tert-butyl hydroperoxide, dripping in 3 to 4 hours, and keeping it warm for 3 hours; add initiator tert-butyl peroxide Hydrogen 0.16g, another initiator tert-butyl hydroperoxid...

Embodiment 3

[0037] A. Add 77g of ethanol and 100g of deionized water to the reaction flask, adjust the pH to 9-11 with 13g of ammonia water, raise the temperature to 50°C under the protection of nitrogen, and start adding 17g of γ-methacryloxypropyl trimethoxy Silane, 20g tetraethyl orthosilicate, 5g anilinomethyltriethoxysilane and 70g xylene mixture were added dropwise for 3 hours, then kept for 2 hours, cooled, and discharged for later use.

[0038] B. Mix 302g of the reaction product containing double bond silica sol and 84g toluene in the reaction flask obtained in step A; A mixture of 9 g styrene, 6 g acrylic acid, 19 g butyl methacrylate, 10 g 2-hydroxyethyl methacrylate, 10 g 2-hydroxypropyl methacrylate, 19 g vinyl acetate, 2.25 g benzoyl peroxide , after 2.5-3 hours, keep warm for 2 hours; add 0.25 g of initiator benzoyl peroxide, add another 0.25 g of initiator benzoyl peroxide after 1.5 hours of heat preservation; heat up to 115 ° C for 1.5 hours, cool down The material is di...

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Abstract

The invention relates to a method for preparing self-extinction resin. The method comprises the following steps: A, preparing double bond-containing silica sol, namely adding ethanol and deionized water into a reaction flask, adjusting the pH to be 9-11 with ammonia water, under the protection of inert gas, at 40 DEG C-65 DEG C, dropwise adding a mixture of a double bond-containing silane coupling agent, a double bond-free silane coupling agent, tetraethylortho silicate and xylene, wherein the addition is completed within 0.5-6 hours, and carrying out heat preservation and reaction for 1-3 hours to obtain the double bond-containing silica sol; and B, preparing the self-extinction resin, namely uniformly mixing the double bond-containing silica sol obtained in the step A and a solvent in the reaction flask, under the protection of the inert gas, refluxing to remove the mixture of the ethanol and water in the step A, and at 70 DEG C-130 DEG C, dropwise adding a mixture of a (meth)acrylate monomer and an initiator, and carrying out radical polymerization reaction to finally obtain the hydroxyl group-containing self-extinction resin. The synthesis method is simple, convenient, good in controllability and low in production cost.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a preparation method of a self-dulling resin. Background technique [0002] In recent years, with the improvement of human living standards, human aesthetic concepts tend to be diversified and fashionable. Matte or dull decorative materials are more and more popular in all walks of life. Some special industries have put forward higher requirements for the optical properties of the surface of objects. At present, the most commonly used matting methods are mainly physical matting and chemical matting. [0003] Traditional matting materials (such as matting coatings, etc.) are mostly matted by adding physical matting agents. In this method, the dispersion effect is not good during the matting process, which leads to an increase in the viscosity of the system, and various lines are easily formed during the matting process. The final coating film has problems such as poor m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F283/12C08G77/18C08G77/26C09D175/04
Inventor 张剑飞王立王进忠白建华李斌范永宁杜三伟
Owner 中昊北方涂料工业研究设计院有限公司
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