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Polymer emulsion, preparation method and re-dispersible latex powder

A technology of polymer emulsion and emulsion, which is applied in the field of polymer emulsion and preparation and redispersible latex powder, can solve the problems of water resistance and other problems, achieve the effects of improving water resistance and stability, long storage period, and reducing packaging costs

Active Publication Date: 2009-10-07
溧阳常大技术转移中心有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The redispersible latex powder has a high solid content and good solubility in water, but the raw material is limited to acrylic ester monomers, and protective colloids need to be added during spray drying, which affects water resistance

Method used

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  • Polymer emulsion, preparation method and re-dispersible latex powder

Examples

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Comparison scheme
Effect test

Embodiment 1

[0047] (1) Synthesis of acrylate, acrylate-styrene core-shell polymer emulsion

[0048] Preparation of nuclear pre-emulsion: 70 grams of deionized water, 7 grams of dodecyl diphenyl ether disulfonic acid sodium salt and 2 grams of nonylphenol polyoxyethylene ether were stirred and dissolved in a pre-emulsification kettle, and then Add 4 grams of chain transfer agent dodecyl mercaptan, mixed monomers: 6 grams of N-methylolacrylamide, 10 grams of acrylic acid, and 182 grams of methyl methacrylate. After the addition, continue to stir for 30 minutes to obtain nuclear pre-emulsion;

[0049] Preparation of the nuclear initiator solution: 57 grams of deionized water, 2 grams of ammonium persulfate, and 2 grams of sodium bicarbonate were stirred and dissolved to obtain the nuclear initiator solution.

[0050] Preparation of shell pre-emulsion: 270 grams of deionized water, 5 grams of alkyl alcohol polyether type nonionic and 12 grams of dodecyl diphenyl ether disulfonic acid sodium ...

Embodiment 2

[0056] (1) Synthesis of acrylate, acrylate-styrene core-shell polymer emulsion

[0057] Preparation of nuclear pre-emulsion: 70 grams of deionized water, 7 grams of dodecyl diphenyl ether disulfonic acid sodium salt, and 3.5 grams of nonylphenol polyoxyethylene ether were stirred and dissolved in a pre-emulsification kettle, and then Add 3.5 grams of chain transfer agent dodecyl mercaptan, mixed monomers: 6 grams of N-methylol acrylamide, 15 grams of acrylic acid, 40 grams of butyl acrylate, and 132 grams of styrene. After the addition, continue to stir for 30 minutes , to obtain nuclear pre-emulsion;

[0058] Preparation of the nuclear initiator solution: 57 grams of deionized water, 2 grams of ammonium persulfate, and 2 grams of sodium bicarbonate were stirred and dissolved to obtain the nuclear initiator solution.

[0059] The preparation of the shell pre-emulsion: 270 grams of deionized water, 6 grams of alkyl alcohol polyether type non-ionic, 12 grams of dodecyl diphenyl...

Embodiment 3

[0065] (1) Synthesis of acrylate, acrylate-styrene core-shell polymer emulsion

[0066] Preparation of nuclear pre-emulsion: 70 grams of deionized water, 7 grams of dodecyl diphenyl ether disulfonic acid sodium salt, and 3 grams of nonylphenol polyoxyethylene ether were stirred and dissolved in the pre-emulsification kettle, and then Add 4.5 grams of chain transfer agent dodecyl mercaptan, mixed monomers: 6 grams of N-methylol acrylamide, 10 grams of acrylic acid, and 182 grams of methyl methacrylate. After the addition, continue to stir for 30 minutes to obtain nuclear pre-emulsion;

[0067] Preparation of the nuclear initiator solution: 57 grams of deionized water, 2 grams of ammonium persulfate, and 2 grams of sodium bicarbonate were stirred and dissolved to obtain the nuclear initiator solution.

[0068] The preparation of the shell pre-emulsion: 270 grams of deionized water, 6 grams of alkyl alcohol polyether type non-ion, 11 grams of dodecyl diphenyl ether disulfonic ac...

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Abstract

The invention relates to a polymer emulsion of acrylate, acrylate-styrene nucleocapsid, comprising deionized water, an emulsifier, an initiator, a buffering agent, a chain transferring agent, acrylic alkyl ester monomer of C4-C12, methyl acrylic alkyl ester monomer of C4-C12, aryl unsaturated monomer, methyl acrylic hydroxyalkyl ester monomer, unsaturated acid monomer of C3-C4 and acrylamide functional monomer. The polymer emulsion is prepared by adopting an emulsion polymerization method; the polymer emulsion and an anticaking agent are used for preparing the re-dispersible latex powder by a spraying and drying method of the emulsion; and the preparation process can be not added with protective colloid, thus obviously improving the water resistance and stability of the latex powder and leading the latex to have the same properties with the original emulsion when being re-dispersed in water. The prepared re-dispersible polymer latex powder has high solid content (approximatively 100%), can reduce the difficulty of delivery and storage, can be packed by paper, reduce packing cost, has good storage stability and long storage period and is not deteriorated due to freezing or volatilization of water.

Description

technical field [0001] The invention relates to the synthesis of acrylate and acrylate-styrene emulsion and the preparation method of redispersible latex powder. The redispersible latex powder can be applied to self-leveling mortar, tile adhesive, thermal insulation mortar, putty and other fields. The admixture of the redispersible latex powder obviously improves the adhesive force between the mortar and different base layers, the flexibility, wear resistance, durability of the mortar and the workability of the mortar. technical background [0002] At present, manufacturers and suppliers at home and abroad mainly supply vinyl acetate and vinyl acetate-branched vinyl carboxylate latex powder. Due to the raw material itself, this redispersible latex powder has disadvantages such as poor water resistance and poor ion stability. . Acrylate and acrylate-styrene latex powder are under research and development. [0003] Chinese patent CN101173021A (publication number) describes ...

Claims

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Application Information

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IPC IPC(8): C08F220/18C08F212/08C08F2/24C08F265/06C08J3/12
Inventor 黎珊储富强王小兵
Owner 溧阳常大技术转移中心有限公司
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