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Acrylic core-shell polymer emulsion and preparation method thereof

A polymer emulsion, acrylic technology, applied in the field of core-shell polymer emulsion, can solve the problems of low tg value, high tensile strength, low tensile strength, etc., and achieve the effect of improving elongation at break and tensile strength

Inactive Publication Date: 2011-04-20
BEIJING DONGLIAN CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, copolymers corresponding to low tg values ​​tend to have lower tensile strengths, while those corresponding to high tg values ​​have higher tensile strengths
In order to ensure the application at low temperature, the polymer emulsion should have two properties of low tg value and high tensile strength at the same time, but the existing products cannot have these two properties at the same time, so it is difficult to apply to various climatic conditions in various regions of our country, especially Climatic conditions below -30°C

Method used

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  • Acrylic core-shell polymer emulsion and preparation method thereof
  • Acrylic core-shell polymer emulsion and preparation method thereof
  • Acrylic core-shell polymer emulsion and preparation method thereof

Examples

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preparation Embodiment 1

[0040] Preparation Example 1 Preparation of Acrylic Core-Shell Polymer Emulsion

[0041] In this preparation example, the preparation method of the acrylic core-shell polymer emulsion of the present invention is described, and the preparation steps are as follows:

[0042] 1. ammonium persulfate (1.6g) is added in ionized water (26g) and made concentration is the aqueous solution of 6%, is mixed with initiator solution;

[0043] 2. Stir and disperse ionized water (100g) and emulsifier (2.7g sodium lauryl sulfate; OP-40 6.3g) for 5-10 minutes, add to the emulsification tank and then add the monomers of the core layer component, Stir for 15-25 minutes, thereby making the core layer component pre-emulsion;

[0044] 3. Stir and disperse ionized water (50g) and emulsifier (sodium lauryl sulfate 0.6g; OP-40 1.2g) for 5-10 minutes, add to the emulsification tank and then add the monomers to form the shell layer, stir for 15 -25 minutes, thereby making the shell component pre-emulsi...

Embodiment 1-27

[0048] Perform the preparation steps in Preparation Example 1, respectively use the amounts of each monomer shown in Table 1 to make acrylic core-shell polymer comparative examples 1-3 and acrylic core-shell polymer examples 1- 27.

[0049] The monomers of the core layer component in Comparative Example 1 are butyl acrylate and hydroxyethyl ester in a ratio of 95:5.

[0050] The monomers of the core layer component in Comparative Example 2 are butyl acrylate and hydroxyethyl ester in a ratio of 90:10.

[0051] The monomers of the core layer component in Comparative Example 3 are butyl acrylate and hydroxyethyl ester, the ratio of which is 85:15.

Embodiment 1

[0052] The monomers of the core layer component in Example 1 are butyl acrylate and acrylonitrile in a ratio of 95:5.

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Abstract

The invention provides acrylic core-shell polymer emulsion for low temperature resisting polymer cement waterproof material. The polymer emulsion is prepared from a component (1) and a component (2) by an emulsion polymerization method, wherein the component (1) is a core layer component of the polymer emulsion and comprises at least the following two monomers in part by weight: 60 to 95 parts of butyl acrylate and 6 to 10 parts of acrylonitrile; and the component (2) is a shell layer component of the polymer emulsion and comprises at least the following two monomers in part by weight: 5 to 15 parts of butyl acrylate and 5 to 15 parts of methyl methacrylate. The invention also provides a preparation method for the acrylic core-shell polymer emulsion. The acrylic core-shell polymer emulsion has lower tg value. A polymer cement composition formed by the acrylic core-shell polymer emulsion and cement has high tensile strength and freezing and thawing resistance and high waterproofness and flexibility.

Description

technical field [0001] The present invention relates to a core-shell polymer emulsion for low-temperature-resistant polymer cement waterproof materials, in particular an acrylic core-shell polymer emulsion with a lower tg value and good tensile strength for the polymer cement composition . The invention also relates to a preparation method of the acrylic core-shell polymer emulsion. Background technique [0002] With the rapid development of urbanization, the construction industry is booming, roof waterproofing is widely used, and new waterproof materials are also emerging in large numbers. Polymer cement waterproof material is one of the new environmentally friendly functional materials. The material is simple in construction, low in cost, and has the characteristics of waterproof, moisture-proof, crack resistance, corrosion resistance, and strong adhesion, so it is widely used in various waterproofing Projects, such as waterproofing of toilets, kitchens, building exterio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/18C08F220/44C08F220/14C08F220/56C08F2/30C08F2/26C04B24/26C04B103/65
Inventor 吕书人李兴明李晓东
Owner BEIJING DONGLIAN CHEM
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