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Method for preparing self-cross linking type water-based acrylic resin and polyurethane hybrid

A technology of water-based acrylic and water-based polyurethane, which is applied in the field of preparation of self-crosslinking water-based acrylic resin-polyurethane hybrids, can solve problems such as high cost, achieve the effects of reducing cost, improving resin performance, and increasing grafting rate

Active Publication Date: 2009-09-02
广东天银实业有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the shortcomings of the above-mentioned water-based resins, and modifies the water-based resins through molecular-level hybridization of water-based acrylic resins and water-based polyurethanes, avoiding the disadvantages of high cost of water-based resins, and simultaneously combining the excellent physical and chemical properties of acrylic resins and polyurethanes. compound in

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Under nitrogen protection, 1.500gMA (maleic anhydride), 31.89gAD (adipic acid), 19.41gNPG (neopentyl glycol), 5.079g trimethylolpropane monoallyl ether, 12.50gBEPD ( 2-ethyl-2-butyl 1,3-propanediol), 5.5g xylene, 0.259g p-hydroxymethyl anisole (inhibitor) was added into the In the reactor of the water tank, heat up to 140° C. with an electric heating mantle, stir, and slowly raise the temperature to 190° C. for 4 hours. Insulate and react at 190°C. After 0.5 hours, start to measure the acid value. When the acid value drops to 5mgKOH / g resin, vacuum out the xylene at about 100°C. After the reaction is completed, dry it under vacuum for 1-2 hours. ≥0.045KPa, cool down to 50-80°C and discharge to obtain unsaturated hydroxyl-terminated polyester (A).

[0021](2) 25.85g of the above-mentioned unsaturated hydroxyl-terminated polyester (A), 4.088g of 1,4-butanediol, and 3.650g of dimethylol propionic acid are added to the reaction with agitator, thermometer, nitrogen gas ...

Embodiment 2

[0033] (1) Under nitrogen protection, 3.985gHPPA (hexahydrophthalic anhydride), 29.95gAD (adipic acid), 23.730gBDO (1,4-butanediol), 6.063gTMPME (trimethylolpropane monoallyl ether) ), 5.0g xylene and 0.255g p-hydroxymethyl anisole (inhibitor) are added in the four-port reactor with stirring, thermometer, nitrogen gas guide pipe, condensation pipe and water separator, and are heated with an electric heating mantle Raise the temperature to 140°C, stir, then slowly raise the temperature to 190°C, and the heating time is 4 hours. Insulate and react at 190°C. After 0.5 hours, start to measure the acid value. When the acid value drops to 5mgKOH / g resin, vacuum out the xylene at about 100°C. After the reaction is completed, vacuum dry for 1 to 2 hours. ≥0.045Kpa, cool down to 50-80°C and discharge to obtain unsaturated hydroxyl-terminated polyester (A).

[0034] (2) Add 25.741g of the above-mentioned unsaturated hydroxyl-terminated polyester (A), 7.029g octane glycol, and 3.491g di...

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Abstract

The invention relates to a method for preparing self-cross linking type water-based acrylic resin and polyurethane hybrid, comprising the following process: (1) unsaturated hydroxyl-terminated polyester is synthesized after the polycondensation of trimethylolpropane monoallyl ether, polyhydric alcohol and polybasic acid; (2) the unsaturated hydroxyl-terminated polyester is used as the soft segment of polyurethane, dihydric alcohol, hydrophilic monomer and isocyanate are added to the polyurethane to react with the polyurethane to prepare unsaturated double-linked water-based polyurethane; and (3) the water-based acrylic resin and polyurethane hybrid in nucleocapsid structure is polymerized from the unsaturated double-linked water-based polyurethane used as surface active agent and the acrylic resin used as monomer by emulsifier-free emulsion. The unsaturated double-linked water-based polyurethane and fluorine-contained acrylic resin are grafted innovatively, and the synthesized environmentally-friendly resin has the excellent performance of both the acrylic resin and polyurethane resin and can be widely used as the base material of water-based woodenware coating, building coating and metal coating.

Description

Technical field: [0001] The invention relates to a preparation method of a self-crosslinking water-based acrylic resin-polyurethane hybrid used for substrates such as cement, wood, and metal. By introducing unsaturated double bonds into waterborne polyurethane and copolymerizing it with acrylate monomers, a new type of waterborne coating resin with a core-shell structure that is widely used and cost-effective is synthesized. Background technique: [0002] Although foreign water-based coatings have been developed for more than 20 years, the performance of coatings still needs to be improved. The research and development of water-based coatings in my country started late, and there is a big gap in both coating varieties and coating performance. At present, acrylic emulsion, water-based polyurethane and water-based acrylic-polyurethane hybrid are the mainstream products of water-based resins. Acrylic emulsion is mainly used as the base material of architectural coatings, and ...

Claims

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Application Information

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IPC IPC(8): C08F283/00C08G18/68C08G63/52
Inventor 闫福安蔡明生吕任扬郑宗武陈少双
Owner 广东天银实业有限公司
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