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Hydroxyl-terminated unsaturated polyamide and preparation method and application thereof

An unsaturated, hydroxyl-terminated technology, applied in the field of polymer chemistry, can solve the problems of high glass transition temperature, high molecular weight, low crosslinking density, etc., and achieve the effects of low film forming temperature, good hardness and high storage stability

Active Publication Date: 2020-09-08
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because polyamide usually has a high molecular weight and a high glass transition temperature, it is difficult to apply it to the field of waterborne polyurethane
In "Preparation of Comb Polyamide Prepolymer for UV Curing Plastic Coatings" published in "Coating Industry" in 2004, Cui Jinfeng et al. described a polyamide resin with low relative molecular weight and ethyl acrylate urethane group-isocyanate A comb-shaped prepolymer with polyamide as the main chain and ethyl acrylate diurethane as the side chain is prepared by addition reaction, and can be used for UV curing coatings, but its end group is an acrylate bond, which cannot pass the reaction Applied to waterborne polyurethane photocuring system
[0003] Chinese published patent CN105121491A discloses a polyamide oligomer that can be applied to the amine-terminated polyamide oligomer of water-based polyamide-urea dispersion, but because it does not have unsaturated double bonds, it will result in low crosslinking density when used in the field of photocuring , chemical resistance, hardness, scratch resistance and other properties are relatively poor

Method used

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  • Hydroxyl-terminated unsaturated polyamide and preparation method and application thereof
  • Hydroxyl-terminated unsaturated polyamide and preparation method and application thereof
  • Hydroxyl-terminated unsaturated polyamide and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0077] The preparation method of hydroxyl-terminated unsaturated polyamide comprises the following steps:

[0078] Put 15g of adipic acid and 15g of D230 into the reactor under a nitrogen atmosphere, heat the reactor to 170°C until the amine value drops below 0.1mg / g, first drop 4.3g of diethanolamine with a dropping funnel and react for 1h Continue to add 2.08 g of ethanolamine dropwise. Then continue to react the mixture at 170°C for 3h, keep 170°C for dehydration for 30min, after dehydration, lower the temperature below 60°C, add 4.7g of isocyanate acrylate, and raise the temperature to 70°C until the NCO% in the system is 0.1% Thereafter, the reaction was completed and a viscous liquid was obtained.

Embodiment 2

[0080] The preparation method of hydroxyl-terminated unsaturated polyamide comprises the following steps:

[0081] Put 14.7g of adipic acid and 22.5g of D400 into the reactor under a nitrogen atmosphere, heat the reactor to 170°C until the amine value drops below 0.1mg / g, and add 2.5g of diethanolamine dropwise with a dropping funnel to react After 1 h, 4 g of ethanolamine was continued to be added dropwise. Then the mixture was continued to react at 170°C for 3 hours, and the temperature was lowered and kept at 120°C for dehydration for 30 minutes. When the NCO% is below 0.1%, the reaction ends and viscous liquid is obtained.

Embodiment 3

[0083] The preparation method of hydroxyl-terminated unsaturated polyamide comprises the following steps:

[0084] Put 32g of adipic acid and 34g of D230 into the reactor under nitrogen atmosphere, heat the reactor to 170°C until the amine value drops below 0.1mg / g, first drop 4.3g of diethanolamine with the dropping funnel and react for 1h Continue to add 6.3 g of ethanolamine dropwise. Then continue to react the mixture at 170°C for 3h, lower the temperature and keep it at 120°C for dehydration for 30min. % below, the reaction ends and viscous liquid is obtained.

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PUM

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Abstract

The invention provides hydroxyl-terminated unsaturated polyamide. The hydroxyl-terminated unsaturated polyamide is prepared by reacting the following raw materials: a) at least one polyamine with thefunctionality of 2-3 and the number-average molecular weight of 60-1000g / mol, b) at least one polybasic acid having the functionality of 2 to 3 and the number average molecular weight of 60 to 500 g / mol, c) a monoamine comprising a hydroxyl group and d) at least one ethylenically unsaturated compound comprising at least one reactive group capable of reacting with a hydroxyl group and having the number average molecular weight of 60 to 500 g / mol. The hydroxyl-terminated unsaturated polyamide can be used for preparing unsaturated polyurethane dispersions, and wood lacquer prepared from the hydroxyl-terminated unsaturated polyamide has the advantages of low film forming temperature, high strength, high tolerance and the like.

Description

technical field [0001] The invention belongs to the field of macromolecule chemistry, and specifically relates to an unsaturated polyamide containing terminal hydroxyl groups, a preparation method and application thereof. Background technique [0002] Compared with polyester, polyamide has better hydrolysis resistance, and compared with polyether, it has better strength, heat resistance, solvent resistance and UV radiation resistance. However, because polyamide usually has a higher molecular weight and a higher glass transition temperature, it is difficult to apply it to the field of waterborne polyurethane. In "Preparation of Comb Polyamide Prepolymer for UV Curing Plastic Coatings" published in "Coating Industry" in 2004, Cui Jinfeng et al. described a polyamide resin with low relative molecular weight and ethyl acrylate urethane group-isocyanate A comb-shaped prepolymer with polyamide as the main chain and ethyl acrylate diurethane as the side chain is prepared by additi...

Claims

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Application Information

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IPC IPC(8): C08G69/28C08G69/26C08G18/67C08G18/66C08G18/48C08G18/42C08G18/34C08G18/32C09D175/14
CPCC08G69/28C08G69/26C08G18/6705C08G18/6607C08G18/6611C08G18/6618C08G18/4238C08G18/4833C08G18/3206C08G18/348C08G18/3228C08G18/4018C09D175/14
Inventor 曹玉阳晋云全纪学顺孙常青
Owner WANHUA CHEM GRP CO LTD
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