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Processing modifying agent applied to polyvinyl chloride pipe materials and pipe fittings

A processing modifier and polyvinyl chloride technology, which is used in the field of injection molding processing modifier and extrusion, can solve the problems of poor heat resistance stability and soft pipe fittings, and achieves high stability, narrow particle size distribution and high stability. Effects of uniformity, high hardness and thermal stability

Active Publication Date: 2014-06-18
江西岳峰集团环保新材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it cannot fundamentally solve the problems of soft PVC pipes and fittings and poor heat resistance stability.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The air in the reactor equipped with a stirrer and a reflux condenser was replaced with nitrogen. Then, 100 parts by weight of deionized water and 4 parts by weight of sodium dodecyl diphenyl ether disulfonate were added, and stirred evenly. 41 parts by weight of styrene monomer, 7 parts by weight of acrylonitrile monomer, 2 parts by weight The n-butyl methacrylate monomer composition was put into it. Then the air in the reactor was replaced with nitrogen, then the reactor was heated to 55°C under stirring, 0.04 parts by weight of potassium persulfate was added to make it react, the reaction temperature was controlled to be less than 73°C, and the temperature was lowered to below 60°C.

[0022] The pre-emulsified second monomer composition The monomer composition includes 41 parts by weight of styrene monomer, 7 parts by weight of acrylonitrile monomer, 2 parts by weight of n-butyl methacrylate, 4 parts by weight of ten Sodium dialkyldiphenyl ether disulfonate, 0.04 pa...

Embodiment 2

[0024] The air in the reactor equipped with a stirrer and a reflux condenser was replaced with nitrogen. Then, 100 parts by weight of deionized water and 4 parts by weight of sodium dodecyl diphenyl ether disulfonate were added, and stirred evenly. 40 parts by weight of styrene monomer, 7 parts by weight of acrylonitrile monomer, 3 parts by weight The n-butyl methacrylate monomer composition was put into it. Then the air in the reactor was replaced with nitrogen, then the reactor was heated to 55°C under stirring, 0.04 parts by weight of potassium persulfate was added to make it react, the reaction temperature was controlled to be less than 73°C, and the temperature was lowered to below 60°C.

[0025] The pre-emulsified second monomer composition The monomer composition includes 40 parts by weight of styrene monomer, 7 parts by weight of acrylonitrile monomer, 3 parts by weight of n-butyl methacrylate, 4 parts by weight of ten Sodium dialkyldiphenyl ether disulfonate, 0.04 pa...

Embodiment 3

[0027] The air in the reactor equipped with a stirrer and a reflux condenser was replaced with nitrogen. Then, 100 parts by weight of deionized water and 4 parts by weight of sodium dodecyl diphenyl ether disulfonate were added, and stirred evenly. 38 parts by weight of styrene monomer, 7 parts by weight of acrylonitrile monomer, 5 parts by weight The n-butyl methacrylate monomer composition was put into it. Then the air in the reactor was replaced with nitrogen, then the reactor was heated to 55°C under stirring, 0.04 parts by weight of potassium persulfate was added to make it react, the reaction temperature was controlled to be less than 73°C, and the temperature was lowered to below 60°C.

[0028] The pre-emulsified second monomer composition The monomer composition comprises 38 parts by weight of styrene monomer, 7 parts by weight of acrylonitrile monomer, 5 parts by weight of n-butyl methacrylate, 4 parts by weight of ten Sodium dialkyldiphenyl ether disulfonate, 0.04 p...

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PUM

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Abstract

Disclosed are a processing modifier for a polyvinyl chloride pipe and pipe fitting and a polyvinyl chloride resin composition using the processing aid. The processing modifier for a polyvinyl chloride pipe and pipe fitting uses a two-stage emulsion polymerization process; the emulsion polymerization uses sodium dodecyl diphenyl ether disulfonate; the first stage monomer composition accounts for 50 wt% of the total monomers; the second stage monomer composition accounts for 50 wt% of the total monomers; the second-stage monomer composition uses a pre-emulsification dropwise addition method: the polymerization temperature is controlled at 55-75°C to prepare a copolymerization emulsion; the emulsion is then spray-dried to prepare a solid powder product; wherein based on the total weight of the first and second stage monomer compositions as 100%, the styrene is 70-85%; the acrylonitrile is 10-20%; the n-butyl methacrylate is 0-10%; and the polymer produced can significantly improve the hardness and thermal resistant stability of a processing modifier for a polyvinyl chloride pipe and pipe fitting.

Description

technical field [0001] The invention relates to a processing modifier for polyvinyl chloride pipes and pipe fittings and a polyvinyl chloride resin composition using the processing aid. The polyvinyl chloride resin is used for producing pipes and pipe fittings, and more particularly to extrusion, Process modifier for injection molding. The processing modifier provides enhanced plasticization during extrusion injection molding of polyvinyl chloride resin without compromising the inherent properties of the polyvinyl chloride resin, and can greatly enhance the hardness increase that is difficult to achieve with conventional processing aids, while also improving The thermal stability of PVC pipe fittings is improved. Background technique [0002] Polyvinyl chloride resin has been widely used in construction, packaging, industrial and agricultural production, transportation, communication and people's daily necessities due to its excellent mechanical strength, corrosion resistan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F212/10C08F220/44C08F220/18C08F2/26C08L27/06C08L25/12C08L25/14
CPCC08L27/06C08L25/12C08L25/14C08F220/18C08F212/10C08F220/44C08F2/26C08F212/08C08F220/1804C08L51/003
Inventor 田岳南
Owner 江西岳峰集团环保新材有限公司
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