Hydroxyl-terminated polyurethane methacrylic resin as well as preparation method and application thereof

A technology of polyurethane methacrylic acid and hydroxyacrylate, which is applied in the field of resin, can solve the problems of poor curing performance, severe aging performance decay of waterproof coating, poor resistance to hot melt, etc., and achieve excellent waterproof and anti-corrosion performance, extended durability, good adhesion effect

Active Publication Date: 2020-03-24
重庆沥智路桥工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to improve the performance of the resin, people have developed a reactive methacrylate-modified resin. Although its temperature stability and mechanical properties have been improved to a certain extent, the final waterproof coating still has severe aging performance and heat resistance. Problems such as poor melting ability and poor curing performance

Method used

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  • Hydroxyl-terminated polyurethane methacrylic resin as well as preparation method and application thereof
  • Hydroxyl-terminated polyurethane methacrylic resin as well as preparation method and application thereof
  • Hydroxyl-terminated polyurethane methacrylic resin as well as preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0050] The specific preparation process of the hydroxyl-terminated polyurethane methacrylic resin of the present embodiment is as follows:

[0051] a. Mix butyl acrylate and 2-ethylhexyl acrylate according to the mass ratio of 1:1 to obtain 312g mixture, add 4g benzoyl peroxide initiator to dissolve evenly, heat to 88°C, pass N 2 Protection, first slowly add 72g of acrylic acid dropwise while stirring, continue to slowly add 116g of hydroxyethyl acrylate dropwise after the addition is complete, continue to react for 0.5h until the viscosity of the mixture increases but can flow smoothly, then cool down to 45°C and continue to react for 20h , until the material reacts completely to gel, then cool the gel mixture naturally and then dry it in vacuum, mix the dried mixture with methyl methacrylate solution according to the mass ratio of 1:1 and dissolve completely to obtain the hydroxyacrylate body Copolymer solution;

[0052] b. Add isophorone diisocyanate into the reaction flas...

Embodiment 2

[0058] The difference between this embodiment and embodiment 1 is as follows:

[0059] In the specific process of preparing hydroxyl-terminated polyurethane methacrylic resin: ①In step a, the initiator is dipentyl peroxide, the amount of hydroxyethyl acrylate added is 130g and the temperature is lowered to 40°C; ②In step b, isoflurane ketone diisocyanate is replaced by dicyclohexylmethane diisocyanate; 3. in the step c, the polyurethane methacrylic resin prepolymer and hydroxyethyl acrylate are reacted according to the mass ratio of 1:2 to 1:1.5. .

[0060] In the specific process of preparing waterproof coatings: 140g of hydroxyl-terminated polyurethane methacrylic resin was replaced by 160g, 56g of butyl methacrylate was replaced by 36g of 2-ethylhexyl acrylate, and the accelerator was N-methyl-N-hydroxy Ethyl-p-toluidine and drying aid are polyamide waxes.

[0061] Except above difference, all the other are identical with embodiment 1.

Embodiment 3

[0063] The difference between this embodiment and embodiment 1 is as follows:

[0064] In the specific process of preparing hydroxyl-terminated polyurethane methacrylic resin: ① in step a, butyl acrylate is replaced by butyl methacrylate, the amount of the mixture is 338g, 72g acrylic acid is replaced by 86g methacrylic acid and hydroxyethyl acrylate is replaced by hydroxypropyl acrylate; 2. isophorone diisocyanate is replaced by the mixture of dicyclohexylmethane diisocyanate and methylene diphenyl diisocyanate in the step b; 3. in the step b and c, the catalyst is stannous octoate and the polymerization inhibitor is 0.002% hydroquinone.

[0065] In the specific process of preparing waterproof coatings: 140g of hydroxyl-terminated polyurethane methacrylic resin is replaced by 150g, 56g of butyl methacrylate is replaced by a mixture of 46g of methyl methacrylate and butyl acrylate, and the accelerator is N,N-di Methyl-p-toluidine and drying aid are cellulose acetate butyrate....

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Abstract

The invention discloses hydroxyl-terminated polyurethane methacrylic resin as well as a preparation method and an application thereof; the structural general formula of the hydroxyl-terminated polyurethane methacrylic resin is represented by a formula 1, and the preparation method comprises the steps: carrying out copolymerization reaction on a hydroxyl acrylate body, and carrying out addition reaction and substitution reaction under catalytic conditions to obtain the hydroxyl-terminated polyurethane methacrylic resin. A hydroxyl-terminated polyurethane methacrylic resin base liquid is prepared from the prepared hydroxyl-terminated polyurethane methacrylic resin, a (methyl) acrylate monomer, an accelerant and a drying aid, and then an initiator is added to prepare a hydroxyl-terminated polyurethane methacrylic resin waterproof coating. The hydroxyl-terminated polyurethane methacrylic resin has the advantages that the low-temperature brittleness is reduced, the high-temperature flexibility is improved; hydroxyl is adopted for terminating and double bonds with activity are introduced, so the curing performance of the resin is enhanced, and the hydroxyl-terminated polyurethane methacrylic resin has great application and popularization value in the aspects of waterproof coatings and bonding materials.

Description

technical field [0001] The invention belongs to the technical field of resins, and in particular relates to a hydroxyl-terminated polyurethane methacrylic resin, a preparation method and an application thereof. Background technique [0002] At present, commonly used waterproof coatings for bridge decks include solvent-based asphalt materials (including emulsified asphalt), epoxy resin, etc. The reasons for the deterioration of such waterproof coatings include poor high and low temperature stability of the material itself, high temperature softening, and low temperature embrittlement; Incomplete evaporation of solvent and water in the layer, or poor water absorption and ion penetration resistance after curing, will cause the asphalt mixture and waterproof adhesive layer to peel off at the bonding interface. The technical key to how to solve the problem of waterproof coatings that can effectively take into account the high and low temperature performance of materials, solvent ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/75C08G18/76C08G18/73C08G18/62C08G18/67C09D175/16
CPCC08G18/755C08G18/758C08G18/7671C08G18/724C08G18/7621C08G18/73C08G18/7642C08G18/6229C08G18/672C09D175/16C08G18/62
Inventor 王军闫东波刘艳马志君曾德亮
Owner 重庆沥智路桥工程有限公司
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