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Modified water-based resin composition

A technology of water-based resin and composition, which is applied in the field of polyurethane resin composition and modified water-based resin composition, can solve the problem of not fully improving the dispersibility and usable time of water-based polyurethane resin composition at the same time, not yet obtaining usable time, Reduce the appearance of the coating, etc., to achieve the effect of excellent coating appearance, prolonging the service life and reducing viscosity

Inactive Publication Date: 2011-06-08
NIPPON POLYURETHANE IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, all these proposals do not fully improve the dispersibility and usable time of the water-based polyurethane resin composition in water at the same time, and have not yet fully improved the dispersibility in water and the usable time as the main subject of the water-based polyurethane resin composition. , and there is no decrease in the appearance of the film due to carbon dioxide generation during coating, and the strength, appearance, and water resistance of the coating film are also excellent. Water-based polyurethane resin composition

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0089] The following discloses examples and compares comparative examples to describe the present invention in more detail, so as to clarify the constitution of the present invention and verify the rationality of each requirement of the constitution of the present invention.

Synthetic example

[0091] 161.7 g of polyol A (polytetramethylene glycol: Mn=2000f=2), 2,2-dihydroxy 10.5 g of methacrylic acid (DMPA) and 63.8 g of dipropylene glycol dimethyl ether (DMDPG) were dissolved by heating at 90° C. for 10 minutes. After cooling to 60°C, 102.9 g of isocyanate A (isopropanol-modified allophanate compound of HDI: NCO=19.1%) was charged, and reacted at 80°C for 2 hours to obtain a carboxyl-containing isocyanate group-terminated preform. polymer solution. The isocyanate content of this prepolymer solution was 3.40%, and the amount of carboxylic acid introduced into the prepolymer was 0.75 mmol / g.

[0092] Then, after adding 7.9 g of triethylamine (TEA) to neutralize the carboxyl group, add 497.8 g of water and 5.4 g of diethyltriamine (DETA) while stirring, and carry out emulsification and water and amine at 30°C for 12 hours. induced chain reaction. When it was confirmed by FT-IR that there was no isocyanate group, filling was performed to obtain an aqueous polyuretha...

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PUM

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Abstract

To provide a polyisocyanate-curable water-based dispersion coating material (such as water-based polyurethane resin composition) which is improved in the dispersibility of the chief material resin in an aqueous medium and prolonged in the pot life by depressing the reaction of water with isocyanate group (which is highly reactive with water) and which can form a coating film exhibiting excellent surface appearance and water resistance equivalent to those of films of conventional solvent-type polyurethane resin coating materials in spite of its being a water-based coating film. A water-based resin composition comprising (A) a water-based acrylic resin or a water-based polyurethane resin obtained by reacting a diisocyanate with a polyol and (B) a polyisocyanate dispersible in the component(A), characterized by containing (C) a low-molecular-weight compound having a carbon-carbon unsaturated bond and a carbonyl group adjacent thereto.

Description

technical field [0001] The present invention relates to a water-based resin composition, in particular to a modified water-based resin composition, especially a polyurethane resin composition, which is modified with a specific additive compound, prolongs the usable time of the composition, and improves the dispersibility of the water medium , and its production method and the use of the composition as a coating agent such as paint. Background technique [0002] Due to its excellent physical properties and economic efficiency, polyurethane resin compositions have been widely used and reused as coating agents such as coatings in many fields, mainly for building materials and vehicles. Starting out, or in order to achieve low prices, it is required and generally carried out to avoid the use of organic solvent-based coating agents, especially volatile organic solvent-based coating agents, and to hydrate or change organic solvents into aqueous media, and to use water dispersion m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/10C08G18/30C08G18/79C09D175/04
CPCC08G18/0866C09D175/16
Inventor 城野孝喜池本满成
Owner NIPPON POLYURETHANE IND CO LTD