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Inorganic-organic silicon hybridized chain transfer agent as well as preparation method thereof, modified (methyl) acrylate polymerization emulsion and preparation method thereof

A technology of chain transfer agent and acrylate, which is applied in the field of acrylate emulsion preparation, can solve the problems of large specific surface area, high surface energy, and poor compatibility of nano-silica, achieve good high and low temperature resistance, improve dispersibility and Excellent compatibility and heat resistance

Active Publication Date: 2018-05-15
GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the large specific surface area and high surface energy of nano-silica, it has poor compatibility with (meth)acrylate polymers, which brings great difficulties in its practical application.

Method used

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  • Inorganic-organic silicon hybridized chain transfer agent as well as preparation method thereof, modified (methyl) acrylate polymerization emulsion and preparation method thereof
  • Inorganic-organic silicon hybridized chain transfer agent as well as preparation method thereof, modified (methyl) acrylate polymerization emulsion and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] An inorganic-organosilicon hybrid chain transfer agent and its modified (meth)acrylate polymer emulsion and preparation method, comprising the following steps:

[0032] (1) Preparation of inorganic-organosilicon hybrid chain transfer agent

[0033] Add 10 parts by weight of tetraethyl orthosilicate and 40 parts by weight of absolute ethanol in a reactor equipped with a thermometer, a condenser tube and a stirrer, heat to 30 ° C, and then add 0.2 parts by weight of ammonia water and 2 parts by weight of deionized water. The mixture was reacted at 30° C. for 2 hours, and then 5 parts by weight of methyltrimethoxysilane was continuously added, and reacted at 30° C. for 4 hours to obtain a modified nano-silica sol. Continue to add 2 parts by weight of mercaptopropyltrimethoxysilane and react at 40° C. for 4 hours to obtain an inorganic-organosilicon hybrid chain transfer agent.

[0034] (2) Preparation of (meth)acrylate emulsion modified by inorganic-organic silicon hybrid...

Embodiment 2

[0038] An inorganic-organosilicon hybrid chain transfer agent and its modified (meth)acrylate polymer emulsion and preparation method, comprising the following steps:

[0039] (1) Preparation of inorganic-organosilicon hybrid chain transfer agent

[0040] Add 20 parts by weight of tetraethyl orthosilicate and 40 parts by weight of absolute ethanol in a reactor equipped with a thermometer, a condenser tube and a stirrer, heat to 45 ° C, and then add 0.5 parts by weight of hydrochloric acid and 10 parts by weight of deionized water The mixture was reacted at 45° C. for 12 hours, and then 10 parts by weight of dimethyldimethoxysilane was continuously added, and reacted at 45° C. for 8 hours to obtain a modified nano-silica sol. Continue to add 10 parts by weight of mercaptopropyltrimethoxysilane and react at 50° C. for 12 hours to obtain an inorganic-organosilicon hybrid chain transfer agent.

[0041] (2) Preparation of (meth)acrylate emulsion modified by inorganic-organic silic...

Embodiment 3

[0045] An inorganic-organosilicon hybrid chain transfer agent and its modified (meth)acrylate polymer emulsion and preparation method, comprising the following steps:

[0046] (1) Preparation of inorganic-organosilicon hybrid chain transfer agent

[0047]Add 30 parts by weight of tetraethyl orthosilicate and 60 parts by weight of absolute ethanol into a reactor equipped with a thermometer, condenser and stirrer, heat to 50°C, then add 0.8 parts by weight of sodium hydroxide and 10 parts by weight of deionized Mixture of water, react at 50°C for 16h, then continue to add 5 parts by weight of methyltriethoxysilane and 10 parts by weight of dimethyldimethoxysilane, react at 50°C for 8h, and obtain modified nano-dioxide Silica sol. Further, 10 parts by weight of mercaptopropyltrimethoxysilane was added and reacted at 50° C. for 16 hours to obtain an inorganic-organosilicon hybrid chain transfer agent.

[0048] (2) Preparation of (meth)acrylate emulsion modified by inorganic-orga...

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Abstract

The invention discloses an inorganic-organic silicon hybridized chain transfer agent as well as a preparation method thereof. The inorganic-organic silicon hybridized chain transfer agent is preparedby modifying silicon dioxide with organic siloxane and by further introducing a sulfydryl silane coupling agent. The invention further discloses a modified (methyl) acrylate polymerization emulsion, and further discloses a preparation method thereof. The preparation method comprises the following steps: in the presence of nitrogen, mixing a (methyl) acrylate monomer, water, an anionic emulsifier,a nonionic emulsifier, an inorganic / organic silicon hybridized chain transfer agent and an initiator, and enabling the components to react for 2-10 hours at 65-90 DEG C, thereby obtaining the modified(methyl) acrylate polymerization emulsion. The modified (methyl) acrylate polymerization emulsion disclosed by the invention is stable in property, very good in high / low temperature resistance, weather resistance and water resistance, and the like.

Description

technical field [0001] The invention relates to the field of acrylate emulsion preparation, in particular to an inorganic-organosilicon hybrid chain transfer agent and a preparation method thereof, a modified (meth)acrylate polymer emulsion and a preparation method thereof. Background technique [0002] Poly(meth)acrylate emulsion not only has the advantages of environmental protection, low cost, and good film-forming properties, but also has excellent properties such as flexibility, weather resistance, and adhesion of the coating film. It is a widely used in coatings, adhesives, etc. , fabric finishing agent matrix resin, but its poor water resistance, low temperature brittle, poor weather resistance and other shortcomings limit its further application. The prior art mainly modifies the (meth)acrylate emulsion from two aspects: one is to modify the (meth)acrylate emulsion by introducing some functional monomers into the (meth)acrylate main chain, A high-performance copolym...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F2/38C08G77/28C08G77/06C08F120/14C08F120/18C08F220/18C08F220/14C08F220/32C08F2/26C08F2/30
CPCC08F2/26C08F2/30C08F2/38C08F120/14C08F120/18C08F220/14C08F220/18C08F220/1804C08F220/32C08F220/325C08G77/06C08G77/28C08F220/1808
Inventor 刘伟区江驰王政芳
Owner GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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