Prepn. of vinyl chloride-vinyl acetate copolymer resin

A technology for vinyl acetate copolymerization and resin blending, which is applied in the field of preparing vinyl chloride-vinyl acetate resin by a suspension method, can solve the problems of insufficiently compact structure, easy precipitation, poor viscosity reduction effect, etc., and achieves easy operation and improved flow and thixotropy. , the effect of low oil absorption
CN1259368CInactive Publication Date: 2006-06-14上海天原集团天原化工有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
上海天原集团天原化工有限公司
Publication Date
2006-06-14
Estimated Expiration
Not applicable · inactive patent

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Abstract

A preparation method of vinyl chloride-vinyl acetate copolymer blended resin. Add vinyl chloride, vinyl acetate, initiator, sizing agent, pH stabilizer, dispersant, auxiliary dispersant and water into the polymerization kettle, react at a temperature of 40-70°C for 3-8 hours, and then add terminator , the aqueous suspension of vinyl chloride-vinyl acetate copolymer blended resin can be obtained, and then purified by conventional methods to remove unreacted vinyl chloride monomer and vinyl acetate monomer, centrifugal dehydration and drying to obtain the finished product . The invention is easy to operate and simple in equipment, and the prepared vinyl chloride-vinyl acetate resin has a compact particle structure, fine and uniform particles, concentrated distribution and low oil absorption rate, can greatly reduce the plasticizing temperature, and improve the storage stability of the plastisol, Improve the flow thixotropy of the paste. Can be widely used in artificial leather, floor leather, wallpaper and other adhesives, marine coatings, steel plate coatings, automotive sealants, anti-rust coatings, and anti-stone impact coatings for automotive chassis.
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Description

technical field

[0001] The invention relates to a method for preparing vinyl chloride-vinyl acetate resin by a suspension method. Background technique

[0002] Adding vinyl chloride-vinyl acetate copolymer blending resin to polyvinyl chloride plastisol can greatly reduce the curing temperature of polyvinyl chloride, reduce the viscosity of the paste, improve the stability of the plastisol, improve the toughness and plasticity of the colloid, and enhance the impact resistance And shear resistance, while enhancing the adhesion to various substrates (such as metal, fiber).

[0003] The vinyl chloride-vinyl acetate copolymer resin used for blending should have good physical and chemical properties, its viscosity number should be 80-100, the apparent density should be above 0.5mg / ml, and the oil absorption rate should be below 14%. . Therefore, a suitable preparation method has become a focus of attention of various manufacturers. Chinese patent 85108354 etc. discloses the pre...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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