Method for preparing high-solid-content and low-viscosity core-shell structure styrene-acrylic emulsion

A technology with a core-shell structure and high solid content, applied in adhesive types, ester copolymer adhesives, coatings, etc., can solve problems such as instability in the preparation process

Inactive Publication Date: 2010-09-22
HUBEI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Moreover, the characteristics of the core-shell two-phase structure also lead to the instability of the preparation process

Method used

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  • Method for preparing high-solid-content and low-viscosity core-shell structure styrene-acrylic emulsion
  • Method for preparing high-solid-content and low-viscosity core-shell structure styrene-acrylic emulsion
  • Method for preparing high-solid-content and low-viscosity core-shell structure styrene-acrylic emulsion

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Embodiment Construction

[0021] Formula 1: The latex prepared by this formula is suitable for use as a water-based adhesive. For example, it is used as sizing agent and glazing agent on the surface of paper, which has good bonding strength. Since the latex particle shell is styrene with a high glass transition temperature, it is not easy to stick to the roller when it is calendered after curing, and it is extruded. The surface gloss of the paper is high.

[0022] The emulsion obtained by the formula is a styrene-acrylic emulsion with a binary particle size distribution, the solid content is greater than 60%, and has the characteristics of good gloss, high solid content and low viscosity. Compared with traditional water-based emulsion adhesives, this product has the characteristics of fast drying, convenient sizing, uniform application and strong adhesion.

[0023]

[0024]

[0025] Formula 2: The latex in this formula is suitable for preparing monodisperse microspheres. The emulsion obtained f...

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Abstract

The invention provides a method for preparing high-solid-content and low-viscosity core-shell structure styrene-acrylic emulsion, which comprises the following steps: firstly, preparing copolymer seed emulsion in binary particle-size distribution of styrene (St) and butyl acrylate (BA); and then, dripping mixed monomers composed of styrene (St) or butyl acrylate (BA) and acrylic acid (AA) on the basis of the semi-continuous feeding process, wherein anionic emulsion and nonionic emulsion constitute a compound emulsification system in the presence of water-soluble initiator and sodium hydrogen carbonate as buffering agent. By controlling the proportion and dripping rate of the compound emulsion in different stages and adjusting the surface coverage of latex particle emulsifier, the method of the invention is capable of preparing high-solid-content and low-viscosity stable core-shell-type poly(butyl acrylate/styrene/acrylic acid)/poly(styrene/acrylic acid) [P(BA/St/AA)/P(St/AA)] emulsion. The product is widely applicable in coatings and adhesives.

Description

technical field [0001] This scheme belongs to the invention patent, which relates to polymer emulsion, specifically a preparation method of modified styrene-acrylic emulsion. Background technique [0002] Styrene-acrylic emulsion is widely used in water-based varnishes, interior and exterior wall coatings, floor polishes and paper coating adhesives because of its excellent film-forming properties, water resistance, weather resistance, color retention and adhesion. . Styrene-acrylic emulsion is an emulsion obtained by polymerizing acrylate monomers and styrene. my country began to develop styrene-acrylic emulsion in the 1970s, and it was officially put into use in the 1980s. The demand for its products has continued to rise. However, ordinary latex products can no longer meet people's needs. Therefore, the research and development of high-performance styrene-acrylic emulsion has become one of the keys to the development of high-performance coatings. [0003] Styrene-acrylic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/18C08F212/08C08F220/06C08F2/30C08F2/26C08F4/40C09D133/08C09J133/08
Inventor 邓锐艾照全周奇龙
Owner HUBEI UNIV
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