Production technology of core-shell type room-temperature self-crosslinking acrylate emulsion

An acrylate and self-crosslinking technology, which is applied in the production process of core-shell self-crosslinking acrylate emulsion at room temperature, can solve the problems of high film brittleness, high emulsion film-forming temperature, water resistance, alcohol resistance, hardness, and anti-resilience. Viscosity and poor flexibility and other problems, to achieve the effect of good anti-adhesion, high anti-pollution, stability and good mechanical properties

Inactive Publication Date: 2015-03-25
QINGDAO SHOUSHENG IND
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  • Summary
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AI Technical Summary

Problems solved by technology

After the traditional acrylic emulsion is formed into a film, its water resistance, alcohol resistance, hardness, anti-stickiness and flexibility are poor, especially the drawbacks of high-temperature stickiness and low-temperature brittleness.
Although increasing the glass transition temperature of the polymer can alleviate the high-temperature tackiness of the coating film to a certain extent, it will also cause problems such as high emulsion film-forming temperature and high brittleness of the coating film.

Method used

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Examples

Experimental program
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Effect test

Embodiment

[0013] Add deionized water and emulsifier into the container, stir to mix thoroughly, then slowly add monomers MMA, SM, BA, MAA, GMA, and start to emulsify for 1 hour to prepare pre-emulsified nuclear monomer; , reflux condenser and dropping funnel, add deionized water and emulsifier, stir and heat in a water bath, blow nitrogen, when the temperature rises to 75°C, add 5% pre-emulsified nuclear monomer, and quickly add the initial initiator Start the reaction until the temperature of the system falls back to obtain the nuclear seed emulsion. On the basis of the nuclear seed emulsion, raise the temperature to 80 ° C, start to drop the remaining pre-emulsified nuclear monomer and initiator solution, and finish the drop for 1.5 hours. Continue to keep warm for 1 hour to obtain Nuclear emulsion; add deionized water and emulsifier in a suitable container, stir to mix thoroughly, then slowly add monomers MMA, SM, BA, MAA, GMA, DAAM, and start emulsification for 1 hour to prepare a pr...

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PUM

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Abstract

The invention discloses a production technology of a core-shell type room-temperature self-crosslinking acrylate emulsion. A room-temperature self-crosslinking monomer is introduced by adopting a seed pre-emulsification semi-continuous core-shell emulsion polymerization process; and the acrylate emulsion which has a hard-core and soft-shell structure, is self-crosslinked at room temperature and can be applied to a wood coating is synthesized. The emulsion with a core-shell structure has the advantages of good after-tack resistance, low film-forming temperature, relatively good film-forming property, stability and mechanical property; hard monomers SM and MMA have relatively high glass transition temperature; a film has relatively high hardness, glossiness, weather fastness, anti-fouling performance, cohesion and structure strength; soft monomers BA and 2EHA play an internal plasticization role in a polymerization system; and the film has certain flexibility and adhesiveness.

Description

[0001] technical field [0002] The invention belongs to the production process of acrylate emulsion, in particular to a production process of core-shell type self-crosslinking acrylate emulsion at normal temperature. [0003] Background technique [0004] In recent years, with the enhancement of people's awareness of environmental protection and the shortage of energy, the research, development and promotion of water-based wood coatings have attracted more and more attention. Acrylate emulsion is a large class of film-forming substances for water-based wood coatings. It has high cost performance, stability, simple synthesis process, good light resistance and aging resistance of the coating, and meets environmental protection requirements. Therefore, acrylate emulsions are widely used in the field of wood coatings. Research on acrylate emulsions has also become a hot spot. After the traditional acrylic emulsion is formed into a film, its water resistance, alcohol resistanc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/14C08F220/18C08F220/06C08F220/32C08F220/58C08F220/28C08F2/24
Inventor 李继升
Owner QINGDAO SHOUSHENG IND
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