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A kind of high solid hyperbranched silicon modified unsaturated polyester resin and preparation method thereof

A technology of hyperbranched polyester and hyperbranched silicon, applied in polyester coatings, coatings, etc., can solve problems such as hardness, low fullness, and reduce the amount of volatile diluents, and achieve excellent performance, excellent solubility, and The effect of high crosslink density

Active Publication Date: 2019-08-06
UNION FOSHAN CHEM +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Chinese patent CN103113569A discloses a hyperbranched unsaturated resin synthesis method and its application in the preparation of environmentally friendly polyesterimide dipping varnish, using polyol A with a functionality of n≥3 as raw material, and aliphatic dianhydride compound B reacts with water to prepare ABn-1 functional monomer, and then through the self-condensation reaction of ABn-1 monomer, adding a polymerization inhibitor, and adding acryloyl chloride or acrylic compound to end-cap and terminate the reaction, the obtained The hyperbranched unsaturated resin HP with a number average relative molecular weight of 600-10000g / mol, the hyperbranched unsaturated resin of the invention is used as a reactive diluent for polyesterimide dipping varnish, not only has good compatibility with polyesterimine, It can significantly reduce the amount of other volatile diluents, and can also improve the fluidity of the impregnation paint; but because the degree of polymerization and molecular weight of the hyperbranched unsaturated resin of the invention are too small, the hardness and fullness of the resin after curing are low, so that it can only be used Use as polyesterimide dipping varnish

Method used

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  • A kind of high solid hyperbranched silicon modified unsaturated polyester resin and preparation method thereof
  • A kind of high solid hyperbranched silicon modified unsaturated polyester resin and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A high-solid hyperbranched silicon-modified unsaturated polyester resin, the preparation steps of which are as follows:

[0030] a), the synthesis of the hyperbranched polyester resin of terminal hydroxyl group: weigh the pentaerythritol of 1 molar weight, the 2,4-dihydroxyvaleric acid of 4 molar weights, the p-methyl that accounts for 1.0% of 2,4-dihydroxyvaleric acid quality Add benzenesulfonic acid into the reactor, heat to 120°C to melt and stir evenly, and react at 120°C for 1 hour;

[0031] b) Weigh 2,4-dihydroxypentanoic acid and 2 times the molar amount of p-toluenesulfonic acid in the previous step, respectively, and add them to the above reactor, and control the reaction at 120°C for 1 hour; repeat the above Reaction step 4 times, obtain the hyperbranched polyester resin of described terminal hydroxyl;

[0032] c), silicone modification and unsaturated monomer capping: Weigh 100.0 parts of the hyperbranched polyester resin with terminal hydroxyl groups, 10.0 ...

Embodiment 2

[0034] A high-solid hyperbranched silicon-modified unsaturated polyester resin, the preparation steps of Osmunda are as follows:

[0035] a), synthesis of hyperbranched polyester resin with terminal hydroxyl groups: weigh 1,2,5-pentanetriol, 3 moles of 2,2-dimethylol propionic acid, 2,2-di P-toluenesulfonyl chloride with 1.0% mass of methylolpropionic acid was added into the reactor, heated to 150°C until melted and stirred evenly, and reacted at 120°C for 0.5h;

[0036] b) Weigh 2,2-dimethylolpropionic acid and 2-fold molar amount of p-toluenesulfonyl chloride in the previous step, respectively, and add them to the above reactor, and control the reaction at 150°C for 0.5h ; Repeat the above reaction steps 5 times to obtain the hyperbranched polyester resin of the terminal hydroxyl group;

[0037]c) Silicone modification and unsaturated monomer capping: Weigh 100.0 parts of the above-mentioned hyperbranched polyester resin with terminal hydroxyl groups, 6.0 parts of DMSO and ...

Embodiment 3

[0039] A high-solid hyperbranched silicon-modified unsaturated polyester resin, the preparation steps of which are as follows:

[0040] a), the synthesis of the hyperbranched polyester resin of terminal hydroxyl group: weigh 1 mole weight of 3-methyl-1,3,5-pentanetriol, 3 mole weight of 2,3-dimethylol butyric acid, account for Add o-toluenesulfonyl chloride with 1.0% mass of 2,3-dimethylolbutyric acid into the reactor, heat to 80°C to melt and stir evenly, and react at 80°C for 1 hour;

[0041] b) Weighing 2,3-dimethylolbutyric acid and 2 times the molar amount of o-toluenesulfonyl chloride in the previous step, respectively, and adding them to the above reactor, and controlling the reaction at 80° C. for 1 h; Repeat above-mentioned reaction step 8 times, obtain the hyperbranched polyester resin of described terminal hydroxyl;

[0042] c), Silicone modification and unsaturated monomer capping: Weigh 100.0 parts of the above-mentioned hyperbranched polyester resin with termina...

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Abstract

The invention relates to a high solid content hyperbranched silicon-modified unsaturated polyester resin which is of a dendritic structure. The high solid content hyperbranched silicon-modified unsaturated polyester resin has a dendritic branched molecular structure, a terminal contains multi-active groups and is not easily crystallized, the solid content is larger than or equal to 90%, and the high solid content hyperbranched silicon-modified unsaturated polyester resin has low viscosity and excellent solubility. The invention further provides a method for preparing the high solid content hyperbranched silicon-modified unsaturated polyester resin. The prepared high solid content hyperbranched silicon-modified unsaturated polyester resin is high in crosslinking density after being mixed with a redox initiation system, a coating film has high hardness, high abrasion resistance and hydrophobicity, the performance is better than that of a traditional unsaturated polyester resin, and the high solid content hyperbranched silicon-modified unsaturated polyester resin can be used in the field of polyester paint applications.

Description

technical field [0001] The invention relates to an unsaturated polyester resin, in particular to a high-solid hyperbranched silicon-modified unsaturated polyester resin and a preparation method thereof, belonging to the technical field of synthetic resins. [0002] technical background [0003] With the rapid development of the furniture industry, people have put forward higher requirements for the protection and decoration of furniture coatings. High-end furniture with wood grain has become the mainstream of the development of the furniture industry today; unsaturated polyester wood lacquers have high fullness , high hardness, good transparency, not easy to collapse, etc., the product has excellent performance, improves the grade of furniture coating, has high decoration, and can be thickly coated at one time, and the construction efficiency is high, especially the benzene in the thinner used Ethylene can participate in the film-forming reaction, reduce the environmental pol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/91C08G63/06C08G63/78C09D167/06
CPCC08G63/06C08G63/78C08G63/912C09D167/06
Inventor 谢义鹏许钧强张武康伦国姚东生
Owner UNION FOSHAN CHEM