Preparation method of polystyrene-acrylate core-shell composite emulsion

A technology of acrylate and polystyrene, which is applied in the field of emulsion preparation, can solve the problems of anti-adhesion and poor heat resistance, and achieve the effect of transparent film formation, simple process and improved mechanical properties

Inactive Publication Date: 2014-03-26
NORTHEAST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the problems that existing thermoplastic polystyrene-acrylate random copolymers often cannot have the advantages of both at the same time, and still have problems such as anti-blocking and poor heat resistance; thereby providing polystyrene-acrylate core-shell composite Preparation method of emulsion

Method used

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  • Preparation method of polystyrene-acrylate core-shell composite emulsion
  • Preparation method of polystyrene-acrylate core-shell composite emulsion
  • Preparation method of polystyrene-acrylate core-shell composite emulsion

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specific Embodiment approach 1

[0022] Embodiment 1: In this embodiment, the polystyrene-acrylate core-shell composite emulsion is prepared as follows:

[0023] Step 1. Weighing by weight percentage: 72% distilled water, 17.7% vinyl mixed monomer, 8.8% acrylate mixed monomer, 1.0% composite emulsifier, 0.38% pH buffer and 0.12% initiator;

[0024] Among them, the vinyl mixed monomer is composed of 80% styrene and 20% butyl acrylate by weight; the acrylate mixed monomer is composed of 50% butyl acrylate, 46% methyl methacrylate and 4% methacrylic acid It is mixed; the compound emulsifier is a mixture of alkylphenol polyoxyethylene ether and sodium lauryl sulfate at a mass ratio of 2:1; the initiator is ammonium persulfate; the pH buffer is sodium carbonate.

[0025] Step 2. Add the distilled water weighed in step 1 into a four-necked bottle, raise the temperature to 55°C, add compound emulsifier and pH buffer, then add 20% of the vinyl mixed monomer weighed in step 1, stir and emulsify for 30 minutes , add 3...

specific Embodiment approach 2

[0028] Specific embodiment two: In this embodiment, polystyrene-acrylate core-shell composite emulsion is prepared according to the following method:

[0029] Step 1. Weigh respectively by weight percentage: 61.2% distilled water, 13.3% vinyl mixed monomer, 23.7% acrylic acid mixed monomer, 1.4% composite emulsifier, 0.32% pH buffer and 0.08% initiator;

[0030] Among them, the vinyl mixed monomer is mixed by 85.7% styrene and 14.3% butyl acrylate by weight percentage; the acrylate mixed monomer is mixed by 54% butyl acrylate, 44% methyl methacrylate and 2% acrylic acid The composite emulsifier is a mixture of alkylphenol polyoxyethylene ether and sodium dodecylsulfonate in a mass ratio of 1:4; the initiator is potassium persulfate; the pH buffer is sodium bicarbonate.

[0031] Step 2. Add the distilled water weighed in step 1 into a four-necked bottle, raise the temperature to 50°C, add compound emulsifier and pH buffer, then add 15% of the vinyl mixed monomer weighed in step...

specific Embodiment approach 3

[0034] Specific embodiment three: In this embodiment, polystyrene-acrylate core-shell composite emulsion is prepared according to the following method:

[0035] Step 1. Weigh respectively by weight percentage: 61% distilled water, 9.1% vinyl mixed monomer, 28% acrylate mixed monomer, 1.5% composite emulsifier, 0.25% pH buffer and 0.15% initiator;

[0036] Among them, the vinyl mixed monomer is composed of 70.6% styrene and 29.4% butyl acrylate by weight; the acrylate mixed monomer is composed of 50% butyl acrylate, 46% ethyl methacrylate and 4% methacrylic acid It is made by mixing; the compound emulsifier is a mixture of alkylphenol polyoxyethylene ether and sodium lauryl sulfate at a mass ratio of 2:3; the initiator is ammonium persulfate; the pH buffer is dipotassium hydrogen phosphate.

[0037] Step 2. Add the distilled water weighed in step 1 into a four-necked bottle, raise the temperature to 58°C, add compound emulsifier and pH buffer, then add 20% of the vinyl mixed mo...

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Abstract

The invention discloses a preparation method of a polystyrene-acrylate core-shell composite emulsion, belongs to the emulsion preparation field, and solves the problems of adhesion resistance, poor heat resistance and the like of a thermoplastic polystyrene-acrylate random copolymer in the prior art. The preparation method is as follows: 1, weighing raw materials; 2, adding distilled water into a reactor, heating up, adding a compound emulsifier, a pH buffer and then part of a mixed vinyl monomer for emulsifying, adding part of an initiator, heating up to react until no reflux exists to obtain a seed emulsion; 3, continuing heating up, dripping off the rest of the mixed vinyl monomer, synchronously adding part of the initiator, after the dripping of the part of the initiator, keeping warm to obtain a core structure emulsion; 4, dripping a mixed acrylate monomer to the core structure emulsion, in the mixed monomer dripping process, adding part of the initiator, after dripping of the part of the initiator, adding the rest of the initiator, keeping warm, then cooling, adding ammonia water, stirring, further cooling, and filtering. The preparation method is applied in the fields of wood veneering, interior decoration, textiles and the like.

Description

technical field [0001] The invention belongs to the field of emulsion preparation; in particular, it relates to a preparation method of polystyrene-acrylate core-shell composite emulsion. Background technique [0002] Polymer emulsion is a synthetic resin product with aqueous solution as the dispersion medium. Because of its simple synthesis, easy operation, and no volatilization of organic components during synthesis and use, it is non-toxic and harmless, and is a green and environmentally friendly industrial product. Therefore, it is widely used in plastic impact modifiers, adhesives, coatings, and flocculants. And fabric sizing agents and finishing agents and other fields. Polyacrylate emulsion (pure acrylic emulsion) is an important type of environment-friendly emulsion. Because of its good physical and chemical properties, film-forming properties, aging resistance, and excellent processing performance, it is widely used in automobiles, furniture, home appliances, and i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F212/08C08F220/18C08F220/14C08F220/06C08F2/26C08F2/30
Inventor 李志国白龙顾继友
Owner NORTHEAST FORESTRY UNIVERSITY
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