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Self-dispersing UV photocurable polyurethane acrylate aqueous copolymer and preparation method and aqueous emulsion made thereof

A technology of polyurethane acrylate and acrylate, which is applied in the field of water-based coatings, can solve the problems of reducing the performance of water emulsions, and achieve the effects of large cohesion, improved cohesion, and high bonding strength

Active Publication Date: 2017-12-26
GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Synthesize UV ​​photocurable polyurethane acrylate water emulsion by chemical method, mainly adopt the method of ordinary emulsion polymerization and core-shell emulsion polymerization, but, the emulsifier, dispersant and other auxiliary agents added in the reaction process will reduce the water content to some extent. properties of emulsion

Method used

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  • Self-dispersing UV photocurable polyurethane acrylate aqueous copolymer and preparation method and aqueous emulsion made thereof
  • Self-dispersing UV photocurable polyurethane acrylate aqueous copolymer and preparation method and aqueous emulsion made thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Preparation of polyurethane prepolymer: vacuum-dry polyether PEG300 (molecular weight: 300) in a vacuum oven at 120°C to remove water for 4 hours; add 100 parts of dehydrated For polyether PEG300, heat up to 60°C, then add 25 parts of toluene diisocyanate, mix evenly under stirring, heat up to 70°C, and react for 6 hours to obtain polyurethane prepolymer PU1.

[0042]Preparation of acrylate prepolymer solution: by weight, add 75 parts of isobutyl methacrylate, 5 parts of hydroxypropyl acrylate, 20 parts of acrylic acid, 100 parts of 3 parts of xylene, 3 parts of azobisisovaleronitrile, stirred and mixed uniformly, after heating up to 100°C for 10 hours, adding 1.2 parts by weight of benzyldiethylammonium chloride and 8 parts by weight of glycidyl methacrylate, The temperature was raised to 102° C. for 3 hours to react to prepare an acrylate prepolymer PA1 solution.

[0043] Preparation of self-dispersing UV photocurable polyurethane acrylate water-based copolymer: 25 p...

Embodiment 2

[0047] Preparation of polyurethane prepolymer: vacuum-dry polyether PEG10000 (molecular weight: 10000) in a vacuum oven at 120°C to remove water for 4 hours; add 100 parts of dehydrated Polyether PEG10000, heat up to 58°C, add 20 parts of diphenylmethane diisocyanate, mix evenly under stirring condition, heat up to 75°C, react for 5 hours to obtain polyurethane prepolymer PU2.

[0048] Preparation of acrylate prepolymer solution: by weight, add 65 parts of isooctyl methacrylate, 10 parts of hydroxyethyl acrylate, 25 parts of methacrylic acid in the reactor equipped with stirrer, thermometer and reflux condenser , 100 parts of ethylene glycol monomethyl ether, 2.5 parts of azobisisobutyronitrile, stir and mix evenly, heat up to 85 ° C and react for 14 hours, add 1.5 parts by weight of tetrabutylammonium bromide and 15 parts by weight of glycidyl acrylate ester, heated to 102°C and reacted for 6 hours to prepare acrylate prepolymer PA2 solution.

[0049] Preparation of self-dis...

Embodiment 3

[0053] Preparation of polyurethane prepolymer: vacuum dry polyether N220 (molecular weight: 2000) in a vacuum oven at 120°C to remove water for 4 hours; add 100 parts of dehydrated Polyether N220, heat up to 65°C, add 25 parts of isophorone diisocyanate, mix evenly under stirring, heat up to 70°C, react for 6 hours to obtain polyurethane prepolymer PU3.

[0054] Preparation of acrylate prepolymer solution: by weight ratio, add 80 parts of isopropyl methacrylate, 5 parts of hydroxyethyl acrylate, 15 parts of methacrylic acid in the reactor equipped with stirrer, thermometer and reflux condenser , 100 parts of dioxane, 2 parts of azobisisoheptanonitrile, stirred and mixed uniformly, heated to 90 ° C for 15 hours, then added 1.8 parts by weight of tetrabutylammonium chloride and 18 parts by weight of glycidyl acrylate, Raise the temperature to 102°C and react for 7 hours to prepare an acrylate prepolymer PA3 solution.

[0055] Preparation of self-dispersing UV photocurable polyu...

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Abstract

The invention belongs to the technical field of aqueous coatings and discloses a self-dispersing UV photo-curing urethane acrylate aqueous copolymer, a preparation method of the aqueous copolymer and an aqueous emulsion prepared from the aqueous copolymer. The preparation method of the self-dispersing UV photo-curing urethane acrylate aqueous copolymer comprises the following steps: (1) preparing a polyurethane prepolymer; (2) preparing an acrylic ester prepolymer solution; and (3) preparing the self-dispersing UV photo-curing urethane acrylate aqueous copolymer. A preparation method of the aqueous emulsion comprises the following steps: adding alkali into the self-dispersing UV photo-curing urethane acrylate aqueous copolymer under the conditions with normal temperature and high-speed dispersion and neutralizing the aqueous copolymer until the aqueous copolymer is neutral, adding deionized water and subsequently dispersing for 15 minutes at a high speed to prepare the aqueous emulsion. The aqueous emulsion can be automatically dispersed in the water in the absence of extra emulgators, so that the reduction of the coating performance caused by the extra emulgators can be avoided.

Description

technical field [0001] The invention belongs to the technical field of water-based coatings, and in particular relates to a self-dispersing UV photocurable polyurethane acrylate water-based copolymer, a preparation method and an aqueous emulsion prepared therefrom. Background technique [0002] UV curing materials are widely used in metal, wood, plastic coating, ink printing, fabric printing, optical fiber coating, etc. due to their advantages of fast curing, low pollution, energy saving and high efficiency. Unsaturated resin is the main substance of UV curing film formation, which determines the main properties of the film. Polyurethane has high bonding strength and peel strength, excellent impact resistance, low temperature resistance, oil resistance and abrasion resistance, etc. It is one of the most widely used UV curable resins. In recent years, due to the increasingly stringent environmental regulations and the improvement of people's awareness of environmental protec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/62C08G18/48C08G18/10C08F220/18C08F220/28C08F220/06C08F220/32C08J3/03C08L75/08C09D175/08
CPCC08F220/18C08F220/1804C08G18/10C08G18/3203C08G18/4063C08G18/48C08G18/625C08G18/6511C08J3/03C08J2375/08C09D175/08C08F220/281C08F220/06C08F220/325
Inventor 刘伟区王红蕾
Owner GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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