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Preparation method of carboxyl silicon modified acrylic resin emulsion

An acrylic resin, carboxyl silicon technology, applied in the direction of coating, etc., can solve the problems of poor emulsion storage stability, anti-shear stability, low surface tension of non-ionic silicone oil, easy to generate shrinkage crater or "snowflake point", etc. Emulsifying performance, not easy to break demulsification and oil floating phenomenon, good storage stability

Active Publication Date: 2013-08-21
深圳市中源鸿福科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As we all know, non-ionic silicone oil has low surface tension, strong hydrophobicity, and is difficult to emulsify, and the polysiloxane chain segment is not charged (charging can increase the electrostatic repulsion between silicon latex particles and make it stable), so this type of polysiloxane is used The acrylic resin emulsion modified by alkane is easy to demulsify and oil drift, and the storage stability and shear stability of the emulsion are poor, and the silicone acrylic coating made of this type of resin is very oily due to the oil drift of polysiloxane. It is easy to produce shrinkage cavity or "snowflake point", so how to improve the stability of silicone acrylic resin emulsion becomes the key to limit the use of this type of resin

Method used

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  • Preparation method of carboxyl silicon modified acrylic resin emulsion
  • Preparation method of carboxyl silicon modified acrylic resin emulsion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026]1) Sequentially weigh 1g of vinyl carboxyl groups with a carboxyl value of 0.3mmol / g, a viscosity of 0.1Pa.s, a vinyl content of 0.3mmol / g, a structure as shown in formula (II), and R being CH=CH. Silicone oil, 53g of n-butyl acrylate and 45g of styrene, 0.3g of 2-acrylamido-2-methylpropanesulfonic acid and 0.7g of acrylic acid were mixed uniformly to form an oil phase component with a total amount of 100g;

[0027] 2) Weigh 1g of sodium lauryl sulfate and 2g of nonylphenol polyoxyethylene ether OP-10, dissolve in 115.8g of deionized water, and obtain a total of 118.8g of surfactant aqueous solution; divide the surfactant aqueous solution into two parts , respectively recorded as component A and component A', the quality of component A is 83.16g, and the quality of component A' is 35.64g;

[0028] 3) Blend the oil phase components with component A, first mechanically stir for 5 minutes, and then emulsify with a high-shear emulsifier with a rotation speed of 10000r / min fo...

Embodiment 2

[0032] 1) Sequentially weigh 10.0g of vinyl-terminated carboxyl group with carboxyl value of 0.6mmol / g, viscosity of 5.0Pa.s, vinyl content of 0.1mmol / g, structure as shown in formula (I), R=CH=CH Silicone oil, 45.0g of tert-butyl methacrylate, 15.0g of 2-ethylhexyl acrylate, 25.0g of acrylonitrile, 3.0g of N-methylolacrylamide and 2.0g of acrylic acid are mixed evenly, and the total amount is 100g oil phase components;

[0033] 2) Weigh 3.0g of sodium secondary alkyl sulfonate and 7.0g of isomeric tridecyl alcohol polyoxyethylene ether 1390, and dissolve them in 226.8g of deionized water to obtain a total of 236.8g of surfactant aqueous solution; divide the surfactant aqueous solution into Two parts, respectively recorded as component A and component A', the quality of component A is 118.4g, and the quality of component A' is 118.4g;

[0034] 3) Blend the oil phase components with component A, first mechanically stir for 5 minutes, and then emulsify with a high-shear emulsif...

Embodiment 3

[0038] 1) Sequentially weigh 3g of carboxyl value of 0.1mmol / g, viscosity of 1.0Pa.s, vinyl content of 0.2mmol / g, structure as shown in formula (I), R is CH 2 CH 2 The terminal vinyl carboxyl silicone oil, 30.0g ethyl acrylate, 12.0g cyclohexyl methacrylate, 8.0g lauryl acrylate and 43.5g styrene, 1.5g 3-chloro-2-hydroxypropyl methacrylate and 2.0 g methacryloxypropyltrimethoxysilane, mixed uniformly, is made into the oil phase component that total amount is 100g;

[0039] 2) Weigh 3.0g of sodium dodecylbenzenesulfonate and 3.0g of fatty alcohol polyoxyethylene ether AEO-9, and dissolve them in 144g of deionized water to obtain a total of 150g of surfactant aqueous solution; The aqueous solution is divided into two parts, respectively denoted as component A and component A', the quality of component A is 100g, and the quality of component A' is 50g;

[0040] 3) Blend the oil phase components with component A, first mechanically stir for 5 minutes, and then emulsify with a hi...

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PUM

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Abstract

The invention relates to a preparation method of a carboxyl silicon modified acrylic resin emulsion, and the preparation method comprises the following steps of: mixing vinyl carboxyl silicone oil with a reactive alkenyl monomer and a functional monomer to prepare an oil-phase component, and then emulsifying by using an anionic / nonionic surface-active agent water solution to prepare a pre-emulsion; and then carrying out water-phase emulsion copolymerization on the pre-emulsion under the action of the anionic / nonionic surface-active agent water solution and an initiating agent, then depressurizing, eliminating low boiling, deodorizing, and regulating pH to 6.0-7.0 to prepare the carboxyl silicon modified acrylic resin emulsion. The carboxyl silicon modified acrylic resin emulsion prepared through the method disclosed by the invention has good centrifugalization stability and storage stability, is less in possibility of generating the phenomena of emulsion breaking and oil floating, is used for preparing a resin coating and can improve the phenomena of hot sticking and cold shortness of acrylic resin and endue certain hydrophobic and flexible functions to the resin coating.

Description

technical field [0001] The invention belongs to the field of fine chemicals, and in particular relates to a preparation method of carboxyl silicon-modified acrylic resin emulsion. Background technique [0002] Acrylic resin has good film-forming properties, strong adhesion, excellent light and weather resistance and flex resistance. As a resin film-forming material, it has been widely used in the fields of fabric coating and paint, but the traditional acrylic resin has poor water resistance. , and hot sticky and cold brittle phenomenon, therefore, how to improve this deficiency has become a practical problem that has attracted much attention and urgently needs to be solved. Polyorganosiloxane (referred to as silicone) has low surface tension, low glass transition temperature, good high and low temperature resistance, soft chain segments, and good weather resistance, stain resistance, breathability and hydrophobic functions. Therefore, silicone and acrylic acid The combinati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/18C08F212/08C08F220/54C08F220/06C08F230/08C08F220/44C08F220/58C08F220/28C08F220/10C08F218/08C08F216/14C08F220/14C08F220/56C08F212/14C08F2/26C08F2/30C09D133/04
Inventor 安秋凤髙同洛黄良仙
Owner 深圳市中源鸿福科技有限公司
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