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Thermosetting polymer aqueous dispersion as well as preparation method and application thereof

A water-based dispersion, polymer technology, applied in the direction of graft polymer adhesive, adhesive type, coating, etc., can solve the problems of unstable storage, performance problems, etc., achieve good film uniformity, improve Thermomechanical properties, high universal effect

Inactive Publication Date: 2021-04-27
上海朗派新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Dispersions comprising a blend of different aqueous polymer dispersions (for example, a blend of an acrylic dispersion and a polyurethane dispersion, or a blend of an acrylic dispersion and an epoxy dispersion) are known to improve coating performance. layer properties; however, blends in wet state exhibit storage instability and are confined to solids
Additionally, coatings from these blends can exhibit performance issues due to latex incompatibility and reverse mixing of the polymers
In addition, the dispersion obtained by the polymerization of pure polyurethane and acrylic monomers through covalent bond reaction is usually only suitable for one-component
When curing as a two-component cross-linking, it is usually necessary to use polyethylenimine as a cross-linking agent, but this type of cross-linking agent has high toxicity

Method used

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  • Thermosetting polymer aqueous dispersion as well as preparation method and application thereof
  • Thermosetting polymer aqueous dispersion as well as preparation method and application thereof
  • Thermosetting polymer aqueous dispersion as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The first step: the preparation of polyurethane acrylic polymer monomer:

[0017] Take 10g of polyester polyol XCP1500NH, 9g of 4,4'-dicyclohexylmethane diisocyanate, 0.1g of catalyst benzyldimethylamine (BDMA), blow nitrogen, heat to 80 degrees, and react for 1 hour. Then add 5 g of nitrogen methylpyrrolidone (NMP), mix for 10 minutes, add 2 g of 2,2-dimethylolpropionic acid (DMPA) dropwise, and continue the reaction at 80 degrees for 3 hours. Then, 11 g of glycidyl methacrylate was continued to be added dropwise, the temperature was lowered to 40° C., 1.5 g of triethylamine was added, and the mixture was mixed and stirred for 30 minutes.

[0018] The second step: the preparation of polymer monomer aqueous dispersion:

[0019] Prepare a four-necked flask, add 72.2g of deionized water, start stirring at 30 degrees, slowly add the polymer monomer prepared in the first step into the reactor dropwise, after the dropwise addition is completed, add 20g of ethylenediamine, ...

Embodiment 2

[0021] The first step: the preparation of polyurethane acrylic polymer monomer:

[0022] Take 9g of polyester polyol Piothane2000NA, 6g of isophorone diisocyanate (IPDI), 0.15g of catalyst benzyldimethylamine (BDMA), blow nitrogen, heat to 80 degrees, and react for 1 hour. Then add 5 g of nitrogen methylpyrrolidone (NMP), mix for 10 minutes, add 2 g of 2,2-dimethylolpropionic acid (DMPA) dropwise, and continue the reaction at 80 degrees for 3 hours. Then continue to drop 5 g of butyl methacrylate and 6 g of glycidyl methacrylate, cool down to 40 degrees, add 1.5 g of triethylamine, and mix and stir for 30 minutes.

[0023] The second step: the preparation of polymer monomer aqueous dispersion:

[0024] Prepare a four-necked flask, add 66.5g of deionized water, start stirring at 30 degrees, slowly add the polymer monomer prepared in the first step into the reactor dropwise, after the dropwise addition is completed, add 20g of ethylenediamine, Stir for 5 minutes. At the same ...

Embodiment 3

[0026] The first step: the preparation of polyurethane acrylic polymer monomer:

[0027] Take 12g of polyester polyol XCP-3000N, 5g of isophorone diisocyanate (IPDI), 0.2g of catalyst benzyldimethylamine (BDMA), blow nitrogen, heat to 80 degrees, and react for 1 hour. Then add 8 g of nitrogen methylpyrrolidone (NMP), mix for 10 minutes, add 2 g of 2,2-dimethylolpropionic acid (DMPA) dropwise, and continue the reaction at 80 degrees for 3 hours. Then continue to dropwise add 5 g of styrene and 7 g of glycidyl methacrylate, cool down to 40 degrees, add 1.5 g of triethylamine, and mix and stir for 30 minutes.

[0028] The second step: the preparation of polymer monomer aqueous dispersion:

[0029] Prepare a four-necked flask, add 68g of deionized water, start stirring at 30 degrees, slowly add the polymer monomer prepared in the first step into the reactor dropwise, after the dropwise addition is completed, add 20g of ethylenediamine, and stir 5 minutes. At the same time, 0.2 ...

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Abstract

The invention discloses a thermosetting polymer water-based dispersion as well as a preparation method and application thereof, relates to a preparation method of the thermosetting polymer water-based dispersion, and particularly relates to a method for directly introducing hybrid resin containing glycidyl ether active reaction groups through covalent bond reaction in a polymerization process of polyurethane and an acrylic monomer, and further preparing the aqueous dispersion capable of being crosslinked at room temperature. The aqueous dispersion is storage stable and contains functional groups of a monoglycidyl ether crosslinkable at room temperature. In the crosslinking reaction process with different amine curing agents, the film forming uniformity is good, and the selectivity universality to the amine curing agents is high. The aqueous dispersion can be widely applied to a waterborne coating system, can be used as a single component, and can also be cross-linked with a common amine curing agent at room temperature, so that the thermal mechanical property, chemical resistance and corrosion resistance of a coating are effectively improved.

Description

technical field [0001] The invention relates to the technical field of preparation of a thermosetting polymer aqueous dispersion, in particular to a thermosetting polymer aqueous dispersion and a preparation method and application thereof. Background technique [0002] Coatings prepared from aqueous dispersions of polymer particles may be deficient in gloss, resistance, and hardness development compared to coatings prepared from solvent-borne polymers. Dispersions comprising a blend of different aqueous polymer dispersions (for example, a blend of an acrylic dispersion and a polyurethane dispersion, or a blend of an acrylic dispersion and an epoxy dispersion) are known to improve coating performance. layer properties; however, the blend in the wet state exhibits storage instability and is confined to solids. Additionally, coatings from these blends can exhibit performance issues due to latex incompatibility and reverse mixing of the polymers. In addition, the dispersion ob...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/00C08F220/32C09D151/08C09D5/08C09J151/08
CPCC08F283/006C09D151/08C09D5/08C09J151/08C08F220/325
Inventor 任少平
Owner 上海朗派新材料科技有限公司
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