Method for preparing polysiloxane-acrylate/styrene copolymers with large particle sizes and core-shell structures

A technology of styrene copolymers and polyacrylates, which is applied in the field of preparation of polysiloxane-acrylic ester/styrene copolymers with large particle size core-shell structure, can solve the problem of polysiloxane-acrylic acid Ester copolymer and other issues, to achieve obvious low-temperature toughening effect, good stability, high efficiency

Active Publication Date: 2017-09-12
广州广化塑料管道有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In summary, the prior art does not yet have a good method for preparing large particle size polysiloxane-acrylate copolymers with a core-shell structure

Method used

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  • Method for preparing polysiloxane-acrylate/styrene copolymers with large particle sizes and core-shell structures
  • Method for preparing polysiloxane-acrylate/styrene copolymers with large particle sizes and core-shell structures
  • Method for preparing polysiloxane-acrylate/styrene copolymers with large particle sizes and core-shell structures

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Preparation of polysiloxane-butyl acrylate emulsion: add 0.3g of dodecylbenzenesulfonic acid, 0.3g of sodium dodecylsulfate and 50g of deionized water into a 250ml reaction bottle, stir well, and heat to 60°C , then add 9.0g of octamethylcyclotetrasiloxane and 1.0g of γ-methacryloxypropyl trimethoxysilane, and keep the reaction at 60°C for 3 hours; mix 20g of deionized water, 0.1g of dodecylbenzene Sulfonic acid, 0.1g sodium lauryl sulfate, 27g octamethylcyclotetrasiloxane, 3.0g γ-methacryloxypropyl trimethoxysilane and 0.04g hexamethyldisiloxane were passed through homogeneous Stir at high speed with the mixer until there is no obvious stratification. Within 2 hours, drop the pre-emulsified mixture into the above-mentioned reaction flask, and react at 60° C. for 5 hours to obtain a polysiloxane emulsion with a solid content of 33.8%.

[0036] Take 8.9g of the above polysiloxane emulsion, add 80g of deionized water, 0.6g of alkylphenol polyoxyethylene ether and 0.6g of ...

Embodiment 2

[0041] Preparation of polysiloxane-butyl acrylate emulsion: Add 0.4g of dodecylbenzenesulfonic acid, 0.4g of sodium dodecylsulfate and 60g of deionized water into a 250ml reaction bottle, stir well and heat to 70°C , then add 9.5g of octamethylcyclotetrasiloxane and 0.5g of γ-methacryloxypropyltrimethoxysilane, keep the reaction at 70°C for 3 hours; mix 30g of deionized water, 0.2g of dodecylbenzene The mixture of sulfonic acid, 0.2g sodium lauryl sulfate, 28.5g octamethylcyclotetrasiloxane, 1.5g vinyltrimethoxysilane and 0.08g hexamethyldisiloxane was stirred at a high speed by a homogeneous mixer to There is no obvious separation, within 2 hours, the pre-emulsified mixture is added dropwise to the reaction flask, and reacted at 70°C for 3 hours to obtain a polysiloxane emulsion with a solid content of 28.6%;

[0042] Take 25g of the above polysiloxane emulsion, add 100g of deionized water, 0.4g of alkylphenol polyoxyethylene ether and 0.2g of sodium lauryl sulfate into anoth...

Embodiment 3

[0047] Preparation of polysiloxane-butyl acrylate emulsion: add 0.4g of tetradecylbenzenesulfonic acid, 0.4g of cetyl sodium sulfate and 60g of deionized water into a 250ml reaction bottle, stir well, and heat to 80°C , then add 9.5g of octamethylcyclotetrasiloxane and 0.5g of γ-methacryloxypropyltrimethoxysilane, and keep it at 80°C for 2 hours; mix 20g of deionized water, 0.4g of tetradecylbenzene The mixture of sulfonic acid, 0.4g sodium cetyl sulfate, 28.5g octamethylcyclotetrasiloxane, 1.5g vinyltrimethoxysilane and 0.08g hexamethyldisiloxane was stirred at a high speed by a homogeneous mixer to There is no obvious separation, within 2 hours, the pre-emulsified mixture is added dropwise to the reaction flask, and reacted at 80°C for 3 hours to obtain a polysiloxane emulsion with a solid content of 31.4%;

[0048] Take 29g of the above polysiloxane emulsion, add 100g of deionized water, 0.8g of alkylphenol polyoxyethylene ether and 0.8g of sodium lauryl sulfate into anothe...

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Abstract

The invention discloses a method for preparing polysiloxane-acrylate/styrene copolymers with large particle sizes and core-shell structures. The method includes adding polyacrylate agglomerating agents into polysiloxane-butyl acrylate emulsion and carrying out agglomeration to obtain polysiloxane-acrylate core emulsion; regulating the temperature of the polysiloxane-acrylate core emulsion until the temperature of the polysiloxane-acrylate core emulsion ranges from 60 DEG C to 80 DEG C, adding inorganic peroxide initiators and sodium carbonate into the polysiloxane-acrylate core emulsion to obtain mixtures, regulating pH (potential of hydrogen) values of the mixtures, adding methyl methacrylate and styrene into the mixtures and carrying out reaction to obtain polysiloxane-acrylate/styrene copolymer emulsion with core-shell structures; adding water into the polysiloxane-acrylate/styrene copolymer emulsion, diluting the polysiloxane-acrylate/styrene copolymer emulsion, allowing the solid content to range from 15% to 19% under the control, adding inorganic salt aqueous solution into the polysiloxane-acrylate/styrene copolymer emulsion to obtain mixtures, stirring the mixtures at the room temperature, ageing the mixtures, carrying out re-cooling, centrifugal separation and washing on the mixtures and drying obtained precipitates. The method has the advantages that particles of polysiloxane-acrylate/styrene copolymer products prepared by the aid of the method have obvious core-shell structures, the average particle sizes range from 400 nm to 600 nm, and obvious low-temperature toughening effects can be realized for polycarbonate for engineering plastics.

Description

technical field [0001] The present invention relates to a preparation method of polysiloxane-acrylic ester / styrene copolymer with large particle size core-shell structure, in particular to a polysiloxane with core-shell structure with latex particle size of 400nm-600nm - Process for the preparation of acrylate / styrene copolymers. Background technique [0002] Polysiloxane rubber has low polarity, good flexibility, excellent high temperature resistance and oxidative degradation resistance; polyacrylate rubber has strong interaction with polar polymers, and is widely used as impact resistance of thermoplastic resins and their alloys Modifier. Polysiloxane-acrylate copolymer combines polysiloxane and polyacrylate, two types of polymers with very different polarities, and has the advantages of both performances, which can endow thermoplastic resins and their alloys with better performance. low temperature impact resistance. Emulsion polymerization is often used to prepare pol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F285/00C08F220/14C08F212/08C08F283/12C08F220/18C08F2/26C08F2/30C08F6/18C08F6/22C08G77/20C08L69/00C08L51/00C08L55/02
CPCC08F2/26C08F2/30C08F6/18C08F6/22C08F283/124C08F285/00C08G77/20C08L69/00C08L2205/03C08F220/14C08F212/08C08L51/00C08L51/08C08L55/02C08F220/1804
Inventor 刘述梅孙嘉恒赵建青
Owner 广州广化塑料管道有限公司
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