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A kind of acrylate modified polyurethane emulsion type waterproof coating and preparation method thereof

A polyurethane emulsion and acrylate technology, applied in polyurea/polyurethane coatings, coatings, etc., can solve the problems of unsatisfactory coating film performance and easy phase separation, and achieve excellent adhesion, increased water solubility, and excellent mechanical properties Effect

Active Publication Date: 2017-03-08
国科广化(南雄)新材料研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the acrylate-modified polyurethane obtained by this method is prone to phase separation, and the coating film performance cannot meet the rapidly developing industrial requirements.

Method used

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  • A kind of acrylate modified polyurethane emulsion type waterproof coating and preparation method thereof
  • A kind of acrylate modified polyurethane emulsion type waterproof coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Preparation of polyurethane prepolymer: Polyether PPG300 (molecular weight: 300) was vacuum-dried in a vacuum oven at 120° C. to remove water for 4 hours. According to the weight ratio, heat up 100 parts of dehydrated polyether PPG300 to 58°C, then add 20 parts of diphenylmethane diisocyanate, mix evenly under stirring conditions, heat up to 75°C, and react for 5 hours to obtain a polyurethane prepolymer PU1.

[0043] Preparation of polyacrylate prepolymer solution: by weight, 65 parts of isooctyl methacrylate, 10 parts of hydroxyethyl acrylate, 25 parts of methacrylic acid, 100 parts of ethylene glycol monomethyl ether, 2.5 parts of azo The diisobutyronitrile was stirred and mixed evenly, and the temperature was raised to 85°C for 14 hours to prepare the polyacrylate prepolymer PA1 solution.

[0044] Preparation of acrylate-modified polyurethane emulsion: Stir 35 parts by weight of PU1 and heat up to 30°C, add 110 parts by weight of PA1 solution and 0.08 parts by weig...

Embodiment 2

[0048] Preparation of polyurethane prepolymer: polyether N210 (molecular weight: 1000) was vacuum-dried in a vacuum oven at 120° C. to remove water for 4 hours. According to the weight ratio, heat up 100 parts of dehydrated polyether N210 to 60°C, then add 25 parts of toluene diisocyanate, mix evenly under stirring conditions, heat up to 70°C, and react for 6 hours to obtain polyurethane prepolymer PU2.

[0049] Preparation of polyacrylate prepolymer solution: by weight, 75 parts of isobutyl methacrylate, 5 parts of hydroxypropyl acrylate, 20 parts of acrylic acid, 100 parts of xylene, and 3 parts of azobisisovaleronitrile were stirred and mixed Evenly, after heating up to 100°C for 10 hours, the polyacrylate prepolymer PA2 solution was prepared.

[0050] Preparation of acrylate-modified polyurethane emulsion: Stir 25 parts by weight of PU2 and heat up to 40°C, add 90 parts by weight of PA2 solution and 0.08 parts by weight of dibutyltin dilaurate, stir and mix evenly, then he...

Embodiment 3

[0054] Preparation of polyurethane prepolymer: polyether PPG10000 (molecular weight: 10000) was vacuum-dried in a vacuum oven at 120° C. to remove water for 4 hours. According to the weight ratio, heat 100 parts of dehydrated polyether PPG10000 to 55°C, then add 40 parts of isophorone diisocyanate, mix evenly under stirring conditions, heat up to 78°C, and react for 4 hours to obtain a polyurethane prepolymer PU3.

[0055] Preparation of polyacrylate prepolymer solution: by weight, 80 parts of propyl methacrylate, 10 parts of hydroxyethyl methacrylate, 10 parts of acrylic acid, 100 parts of cyclohexanone, 2.8 parts of azobisisobutyronitrile Stir and mix evenly, heat up to 95° C. and react for 13 hours to prepare polyacrylate prepolymer PA3 solution.

[0056] Preparation of acrylate-modified polyurethane emulsion: Stir 25 parts by weight of PU3 and heat up to 50°C, add 100 parts by weight of PA3 solution and 0.05 part by weight of dibutyltin dilaurate, stir and mix evenly, the...

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Abstract

The invention belongs to the technical field of water-based paint, and discloses an acrylic ester modified polyurethane emulsion type waterproof coating and a preparation method thereof. The waterproof coating comprises the following components in part by weight: 100 parts of acrylic ester modified polyurethane emulsion, 0.1-0.3 part of defoaming agents, 0.5-12 parts of plasticizer, 0.05-0.3 part of flatting agents, 5-40 parts of packing and 5-20 parts of water. The acrylic ester modified polyurethane emulsion type waterproof coating has an excellent emulsifying effect without the aid of emulsifying agents, and is high in spreading performance and excellent in adhesive force. Because polyurethane and polyacrylic esters are combined by using a chemical method and cannot be separated from each other chemically, the combination of the polyurethane and the polyacrylic esters has characteristics of the polyurethane and characteristics of the polyacrylic esters, has abundant ester groups and alkyl groups, can form an action force on interfaces with different polarities, and is excellent in adhesive force and mechanical performance; light coating can be implemented; volume shrinkage is avoided; water serves as solvent; and the acrylic ester modified polyurethane emulsion type waterproof coating is produced safely and is environment-friendly.

Description

technical field [0001] The invention belongs to the technical field of water-based coatings, in particular to an acrylate-modified polyurethane emulsion type waterproof coating and a preparation method thereof. Background technique [0002] Coating is an indispensable material in contemporary times, and it plays an important role in construction, packaging and other fields. Waterproof coatings can play the role of moisture-proof, leak-proof and protect the substrate from water erosion damage, it is one of the most widely used coating varieties. Polyurethane has good comprehensive properties, good film-forming properties, strong adhesion, high elongation, wear resistance and other excellent properties, and is widely used as waterproof coatings. Since the 1990s, polyurethane waterproof coatings are mainly solvent-based, which is harmful to the environment, construction and users, so its application is limited. Waterborne polyurethane emulsion waterproof coatings, which not o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/08C09D175/04C09D7/12C08G18/62C08G18/48C08G18/10C08F220/18C08F220/28C08F220/06
Inventor 刘伟区王红蕾
Owner 国科广化(南雄)新材料研究院有限公司
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