Polychloroethylene processing modifier and its preparation process and application thereof

A technology for processing modifiers and polyvinyl chloride, which is applied in the field of modifying additives for polyvinyl chloride processing, can solve the problems of inability to obtain processing modifiers and polymerization reactions, etc., and achieve improved smoothness, improved processing performance, Effect of improving plasticizing performance

Active Publication Date: 2006-06-28
SHANDONG RIKE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] For the control of the polymerization reaction of preparing polyvinyl chloride processing modifier, all those skilled in the art think: because the reaction process is an exothermic reaction, in order to prevent violent polymerization, the reaction monomer must be added gradually or in batches In the reactor, and ensure a higher reaction temperature to proceed smoothly, the polymerization reaction can hardly proceed at a lower reaction temperature, even if it can react, the ideal processing modifier cannot be obtained

Method used

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  • Polychloroethylene processing modifier and its preparation process and application thereof
  • Polychloroethylene processing modifier and its preparation process and application thereof
  • Polychloroethylene processing modifier and its preparation process and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1 Put 120 parts by weight of water, 75 parts by weight of styrene, 25 parts by weight of acrylonitrile, 1.1 parts by weight of sodium lauryl sulfate, and 0.01 parts by weight of potassium persulfate into the reactor at one time, Raise the temperature to 50°C at a stirring speed of 200 rpm, and keep the temperature below 55°C for 20 hours to obtain an emulsion of styrene and acrylonitrile copolymer, and obtain styrene and acrylonitrile with an intrinsic viscosity of 12.5 after drying class of copolymers.

Embodiment 2

[0030] Example 2 Put 120 parts by weight of water into the reactor at one time, then add 75 parts by weight of styrene, 25 parts by weight of acrylonitrile, 1.1 parts by weight of sodium lauryl sulfate, and 0.01 parts by weight of persulfuric acid Potassium is put into the reactor twice, and the order of addition is that the first monomer is reacted and then the second monomer is added, and the temperature is raised to 50°C at a stirring speed of 200 rpm, and the temperature Keep the reaction temperature below 55°C for 20 hours to obtain a styrene-acrylonitrile copolymer emulsion, and obtain a styrene-acrylonitrile copolymer with an intrinsic viscosity of 9.8 after drying.

Embodiment 3

[0031] Example 3 Same as Example 2, except that the reaction mixture was added into the reactor three times to obtain a styrene-acrylonitrile copolymer with an intrinsic viscosity of 8.2.

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Abstract

The invention relates to a manufacture method for PVC process modifier and the application. The feature is that it is made from 65-95 weight portions styrene, 5-35 weight portions of acrylonitrile. It adopts high polymer of styrene and acrylonitrile as modifier that could effectively improve the smooth of the PVC rheology block, and the plasticizing.

Description

technical field [0001] The invention belongs to the field of modifying additives for polyvinyl chloride processing, in particular to a high molecular polymer capable of effectively improving the processing performance of polyvinyl chloride, especially the plasticizing performance. Background technique [0002] Polyvinyl chloride (PVC) is a general-purpose thermoplastic with excellent performance, and it is one of the plastic varieties with the largest output in my country. The processing and forming performance of polyvinyl chloride is poor, and processing modifiers must be added to improve its plasticizing processing performance. Styrene-acrylonitrile processing modifiers are three commonly used modifiers in my country. Neutral / price ratio The most excellent one, but the intrinsic viscosity of all styrene-acrylonitrile processability modifiers is generally less than 6.0. When manufacturing polystyrene-based polyvinyl chloride processing modifiers, the reaction temperature i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08L25/12
Inventor 郑小军赵东日
Owner SHANDONG RIKE CHEM
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