Polyurethane modified acrylic emulsion, preparation method of acrylic emulsion and prepared artificial stone

An acrylic emulsion, polyurethane modification technology, applied in the field of artificial stone, can solve the problems of high curing shrinkage, unsatisfactory heat resistance and flame retardancy, poor processing and shapeability, etc., and achieves high molecular weight, good performance and high strength. Effect

Active Publication Date: 2013-10-23
广东海顺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

Due to the large curing shrinkage rate of unsaturated polyester, the processing and setting properties are not good, the heat distortion temperature is 50-60 ℃, and the heat resistance and flame retardancy are not ideal

Method used

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  • Polyurethane modified acrylic emulsion, preparation method of acrylic emulsion and prepared artificial stone
  • Polyurethane modified acrylic emulsion, preparation method of acrylic emulsion and prepared artificial stone
  • Polyurethane modified acrylic emulsion, preparation method of acrylic emulsion and prepared artificial stone

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] 1) Preparation of hydroxy acrylate emulsion

[0069] 100 parts by weight of water, 5.5 parts by weight of sodium lauryl sulfate, 2.5 parts by weight of nonylphenol polyoxyethylene ether, 30 parts by weight of styrene, 150 parts by weight of methyl methacrylate, 18 parts by weight of butyl acrylate, and acrylic acid Mix 2 parts by weight evenly to obtain a uniform pre-emulsion;

[0070] Add 300 parts by weight of water to the reaction kettle, heat up to 80°C, add 10% of the pre-emulsion, 0.5 parts by weight of the initiator ammonium persulfate, and react for 35 minutes until the blue light is sufficient; add the remaining pre-emulsion and 2.0 parts by weight of the initiator dropwise Ammonium persulfate, the dripping time is 3 hours, and the temperature is kept for 30 minutes after dripping;

[0071] 150 parts by weight of butyl acrylate, 55 parts by weight of methyl methacrylate, 50 parts by weight of hydroxyethyl acrylate, and 5 parts by weight of acrylic acid are mixed unif...

Embodiment 2

[0079] 1) Preparation of hydroxy acrylate emulsion

[0080] Combine 80 parts by weight of water, 2 parts by weight of sodium lauryl sulfate, 1.5 parts by weight of nonylphenol polyoxyethylene ether, 10 parts by weight of styrene, 100 parts by weight of methyl methacrylate, 10 parts by weight of butyl acrylate, and acrylic acid Mix 2 parts by weight to obtain a pre-emulsion.

[0081] Add 260 parts by weight of water into the reaction vessel, raise the temperature to 70° C., add 4% pre-emulsion and 0.2 parts by weight of ammonium persulfate, and react for 15 minutes until the blue light is sufficient. Start dropping the remaining pre-emulsion and 1.2 parts by weight of ammonium persulfate. The dropping time was 2.5 hours, and the temperature keeping reaction was 30 minutes after the dropping. Mix 140 parts by weight of butyl acrylate, 40 parts by weight of methyl methacrylate, 30 parts by weight of hydroxyethyl acrylate, and 10 parts by weight of acrylic acid as the second-step mix...

Embodiment 3

[0088] 1) Preparation of hydroxy acrylate emulsion

[0089] 140 parts by weight of water, 8.5 parts by weight of sodium lauryl sulfate, 6.5 parts by weight of nonylphenol polyoxyethylene ether, 155 parts by weight of styrene, 203 parts by weight of methyl methacrylate, 85 parts by weight of butyl acrylate, and acrylic acid 2.5 parts by weight are stirred evenly to obtain a pre-emulsion.

[0090] Add 320 parts by weight of water into the reaction vessel, increase the temperature to 85° C., add 15% of pre-emulsion, 0.8 parts by weight of ammonium persulfate, and react for 45 minutes until the blue light is sufficient. Start dropping the remaining pre-emulsion and 2.5 parts by weight of ammonium persulfate. The dripping time is 4 hours, and the temperature keeping reaction is 30 minutes after dripping. 160 parts by weight of butyl acrylate, 80 parts by weight of methyl methacrylate, 55 parts by weight of hydroxyethyl acrylate, and 5 parts by weight of acrylic acid were mixed uniform...

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Abstract

The invention provides polyurethane modified acrylic emulsion, a preparation method of the acrylic emulsion and a prepared artificial stone. According to the technical scheme, the method comprises the following steps of: synthesizing hydroxyl acrylate emulsion, and dispersing the synthesized polyurethane prepolymer in the hydroxyl acrylate emulsion, so that the polyurethane is grafted to the hydroxyl acrylate emulsion; forming a core-shell structure. The polyurethane modified acrylic emulsion synthesized by the route has a core-shell crosslinking structure, the polyurethane is the shell, and the acrylic acid is the shell. The compatibility between two incompatible polymers can be improved, so that the tensile strength, modulus, hardness, durability and stability of the obtained material are further improved. Compared with an interpenetrating network, the polyurethane modified acrylic emulsion has high micro-phase separation degree and high transparency. Compared with the acrylic component prepared by synthesizing polyurethane and polymerizing in polyurethane particles, the acrylic component has high crosslinking degree, high molecular compatibility and high transparency and hardness. The polyurethane modified acrylic emulsion has high hardness and high water resistance brought by crosslinking density of the interpenetrating network; moreover, the polyurethane modified acrylic emulsion has the advantages of high wear resistance and the like of the core-shell structure, the carboxyl group content is low, and high water resistance is brought.

Description

technical field [0001] The invention belongs to the field of chemical polymers and new materials, and in particular relates to a polyurethane-modified acrylic emulsion, a preparation method thereof and an artificial stone prepared by the same. Background technique [0002] At present, polyurethane modified acrylic emulsion is mainly based on interpenetrating network structure. Since Millar first proposed the concept of interpenetrating polymer network (IPN) in 1960, IPN has become a new field of development in polymer material science. Interpenetrating polymer network (interpenetrating polymer network, IPN) is a unique polymer alloy with multi-phase components, at least one of its components is a cross-linked structure, which achieves "forced mutual solubility" and "molecular synergy" at the molecular level. Effect. Through the IPN technology, the two components of polyurethane and acrylate can form microphase domains in the material respectively, and there is a three-dimen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/62C08G18/48C08G18/12C08F220/12C08F212/08C08F220/18C08F220/06C08F2/26C08F2/30C04B26/16
Inventor 付少辉易承志
Owner 广东海顺新材料科技有限公司
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