Method for synthesizing silane modified waterborne polyurethane-acrylic resin

A water-based polyurethane and acrylic resin technology, applied in polyurea/polyurethane coatings, coatings, etc., can solve problems such as adhesion, water resistance, solvent resistance, fullness, hardness, wear resistance, and durability that are not as good as oil-based coatings. Good oxidation resistance and weather resistance, improved stability, and improved adhesion

Inactive Publication Date: 2019-08-02
广东伟明涂料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Many properties of the above water-based resins cannot be compared with oil-based resin coatings. Adhesion, water resistance, solvent resistance, fullness, hardness, wear resistance, and durability are not as good as oil-based coatings.

Method used

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  • Method for synthesizing silane modified waterborne polyurethane-acrylic resin
  • Method for synthesizing silane modified waterborne polyurethane-acrylic resin
  • Method for synthesizing silane modified waterborne polyurethane-acrylic resin

Examples

Experimental program
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Effect test

Embodiment 1

[0032] First, add 33g polydibutyl adipate (M=2000), 14g isophorone diisocyanate (IPDI) into the reaction flask for vacuum dehydration, then add 1.5g dimethylol propionic acid (DMPA), and 30g Methyl methacrylate and 8g butyl acrylate, add 0.01g catalyst DBTDL, react at 80°C for 2.5h, then add 4g silane coupling agent γ-aminopropyltriethoxysilane KH-550 for polyurethane modification reaction for 1h , and then add 3g of hydroxyethyl methacrylate for double bond capping, then slowly dropwise add 1.5g of organic amine neutralizer triethanolamine (TEA) to neutralize and form a salt, react for 25min, cool the temperature to 40°C, and stir at a high speed Add water to self-emulsify to obtain a silane-modified PU prepolymer with a double bond as the shell, methyl methacrylate and butyl acrylate as the core, and then raise the temperature to 80°C and add 0.2g of the initiator APS aqueous solution dropwise , and 8g of functional monomer glycidyl methacrylate (GMA), reacted at 80°C for 2h...

Embodiment 2

[0035] First, add 32.5g polydibutyl adipate (M=2000), 12g hexamethylene diisocyanate into the reaction bottle for vacuum dehydration, then add 1.5g hydrophilic chain extender DMPA, and 30g methyl methacrylate And 8g butyl acrylate, add 0.01g catalyst DBTDL, react at 80°C for 2.5h, then add 4g silane coupling agent KH-550 for polyurethane modification reaction for 1h, then add 3g hydroxyethyl methacrylate for double bond capping , then slowly add 1.5g of organic amine neutralizer TEA to neutralize and form salt, react for 25min, cool down to 40°C, add water under high-speed stirring to self-emulsify to obtain a silane-modified PU prepolymer terminated with double bonds. shell, methyl methacrylate and butyl acrylate as the core self-emulsifying body, and then heated to 80 ° C, dropwise added 0.2 g initiator APS aqueous solution, and 8 g functional monomer glycidyl methacrylate (GMA), at 80 React at ℃ for 2 hours, and cool down to obtain silane-modified water-based polyurethane-a...

Embodiment 3

[0038]At first 33g polydibutyl adipate (M=2000), 14g IPDI are added in the reaction flask for vacuum dehydration, then add 0.5g hydrophilic chain extender DMPA, and 30g methyl methacrylate and 8g butyl acrylate, Add 0.01g catalyst DBTDL, react at 80°C for 1h, then add 1.2g sodium 1,2-dihydroxy-3-propanesulfonate for further hydrophilic chain extension for 1.5h, add 4g silane coupling agent KH-550, The mixture of A-174 and Coatosil1757 was subjected to polyurethane modification reaction for 1 hour, then 3g of hydroxyethyl methacrylate was added for double bond capping, and then 1.5g of organic amine neutralizer AMP-95 (2-amino-2 -Methyl isopropanol) to neutralize to form a salt, react for 25 minutes, cool to 40°C, add water under high-speed stirring to self-emulsify to obtain a silane-modified PU prepolymer terminated with a double bond as the shell, methyl methacrylate The self-emulsifying body with butyl acrylate as the core, then heated to 80°C, added dropwise 0.2g of initia...

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Abstract

The invention relates to the synthesis of waterborne resin, in particular discloses a method for synthesizing silane modified waterborne polyurethane-acrylic resin, and aims to solve the problem thatconventional aqueous resin is poor in water resistance and solvent resistance. The preparation method comprises the following steps: carrying out vacuum dehydration on polyester polyol and diisocyanate, and adding a hydrophilic chain extender, an acrylate mixed monomer and a catalyst to carry out a reaction so as to obtain a polyurethane prepolymer I; adding a silane coupling agent into the prepolymer I to carry out a polyurethane modification reaction, and carrying out double-bond end sealing, neutralization salting and self emulsification to obtain a self emulsifier II; adding an initiator solution and a functional monomer glycidyl methacrylate into the self emulsifier II to carry out a reaction for 2-4 hours, and cooling to obtain the silane modified waterborne polyurethane-acrylic resin. The obtained resin is good in water resistance and solvent resistance and good in adhesion property, and can be used for aqueous wooden instrument coatings applied to furniture such as cabinets, wooden doors, floors, wardrobes, tables, chairs, beds and the like.

Description

technical field [0001] The invention relates to the preparation of water-based wood coating resins, more specifically, to a method for synthesizing silane-modified water-based polyurethane-acrylic resins. Background technique [0002] my country's furniture production ranks first in the world, reaching hundreds of millions of pieces every year. Coupled with the rapid growth of market demand for overall cabinets, wooden doors, floors, sofas, wardrobes, tables and chairs, and furniture, wood coatings have broad development prospects. So far, 98% of my country's wood coatings are oily, which requires the use of a large number of volatile and harmful solvents such as dichloroethane, butyl ester, trimethylbenzene, toluene, xylene, DMF, and isoflurane. Ketones, etc., destroy the ecological balance and seriously pollute the environment. As people become more and more aware of environmental protection, it is particularly important to develop environmentally friendly, resource-saving...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/00C08F220/14C08F220/18C08G18/67C08G18/66C08G18/42C08G18/38C08G18/34C08G18/32C08G18/12C09D175/14
CPCC08F283/008C08G18/12C08G18/289C08G18/348C08G18/4238C08G18/6659C08G18/672C09D175/14C08G18/3855C08G18/42C08G18/6633C08F220/1804
Inventor 梁炳康梁炳中李子胜梁玉棠周金枝
Owner 广东伟明涂料有限公司
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