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Flame-retardant high-elasticity PVC injection molding material

An injection molding, high elasticity technology, applied in the field of PVC injection molding, can solve the problems of reducing the amount of plasticizer used, poor fluidity of polyvinyl chloride, etc., to achieve poor fluidity, good plasticizing performance and flow performance, reasonable and scientific formula Effect

Active Publication Date: 2021-04-16
ZHEJIANG WELLSCOM PLASTIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chlorine content is 25~40% chlorinated polyethylene and the compatibility of polyvinyl chloride is better, and has the property of elastomer, therefore in the present invention, add chlorine content as 25~40% chlorinated polyethylene as non-migration , non-volatile permanent plasticizer to improve the durability of polyvinyl chloride, can reduce the usage of plasticizer; Chlorinated polyethylene can also reduce the volatilization of liquid plasticizer simultaneously; Among the present invention, by adding nitrile rubber Powder is used to ensure the softness of the material and improve the elasticity of the material. Powdered nitrile rubber can make PVC obtain better elongation at break with less plasticizer, and is compatible with PVC Good performance, can improve the processing performance of polyvinyl chloride, and can ensure the softness of the material and improve the elasticity of the material; in the present invention, the problem of poor fluidity of polyvinyl chloride is solved by adding a self-made flow modifier

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A flame-retardant high-elasticity PVC injection molding material, which is made of the following raw materials in the weight ratio: 100kg polyvinyl chloride (SG-4 type), 15kg chlorinated polyethylene with a chlorine content of 25-40%, 10kg liquid plasticized agent (trioctyl trimellitate and dioctyl terephthalate mixed at a mass ratio of 2:3), 5kg stabilizer (calcium zinc composite stabilizer), 1kg lubricant (calcium stearate), 5kg Powdered nitrile rubber, 0.5kg antioxidant (bisphenol A), 8kg flame retardant (decabromodiphenyl ether), 15kg flow modifier, wherein the flow modifier is made by the following method: styrene, propylene Add the amide and initiator azobisisobutyronitrile into an appropriate amount of tetrahydrofuran and stir evenly, then raise the temperature to 80°C under stirring, keep it warm for 2.5 hours, pour it into methanol to precipitate, repeat three times, and dry the solid in vacuum; styrene, acrylamide , The molar ratio of the initiator azobisisobu...

Embodiment 2

[0019] A flame-retardant high-elasticity PVC injection molding material, which is made of the following raw materials in weight ratio: 110kg polyvinyl chloride (SG-4 type), 20kg chlorinated polyethylene with a chlorine content of 25-40%, 15kg liquid plasticizer agent (trioctyl trimellitate and dioctyl terephthalate mixed at a mass ratio of 2:3), 7kg stabilizer (calcium zinc composite stabilizer), 1.5kg lubricant (calcium stearate), 8kg powder nitrile rubber, 0.8kg antioxidant (bisphenol A), 10kg flame retardant (decabromodiphenyl ether), 20kg flow modifier, wherein flow modifier is made by following method: styrene, Add acrylamide and initiator azobisisobutyronitrile into an appropriate amount of tetrahydrofuran and stir evenly, then heat up to 85°C under stirring, keep warm for 2 hours, pour into methanol to precipitate, repeat three times, and dry the solid in vacuum; styrene, acrylamide , The molar ratio of the initiator azobisisobutyronitrile is 17:1:1.

Embodiment 3

[0021] A flame-retardant high-elasticity PVC injection molding material, which is made of the following raw materials in weight ratio: 105kg polyvinyl chloride (SG-4 type), 18kg chlorinated polyethylene with a chlorine content of 25-40%, 12kg liquid plasticized agent (trioctyl trimellitate and dioctyl terephthalate mixed at a mass ratio of 2:3), 6kg stabilizer (calcium zinc composite stabilizer), 1.2kg lubricant (calcium stearate) 6kg Powdered nitrile rubber, 0.6kg antioxidant (bisphenol A), 9kg fire retardant (decabromodiphenyl ether), 18kg flow modifier, wherein the flow modifier is made by the following method: styrene, propylene Add the amide and initiator azobisisobutyronitrile into an appropriate amount of tetrahydrofuran and stir evenly, then raise the temperature to 82°C under stirring, keep it warm for 2.2 hours, pour it into methanol to precipitate, repeat three times, and dry the solid in vacuum; styrene, acrylamide , The molar ratio of the initiator azobisisobutyro...

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PUM

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Abstract

The invention discloses a flame-retardant high-elasticity PVC injection molding material which is prepared from the following raw materials in parts by weight: 100-110 parts of polyvinyl chloride, 15-20 parts of chlorinated polyethylene with the chlorine content of 25-40%, 10-15 parts of a liquid plasticizer, 5-7 parts of a stabilizer, 1-1.5 parts of a lubricant, 5-8 parts of powdered acrylonitrile-butadiene rubber, 0.5-0.8 part of an antioxidant, 8-10 parts of a flame retardant and 15-20 parts of a flow modifier. According to the invention, the formula is reasonable and scientific, the flame retardant property, plasticizing property and flowing property of the material are good, the elasticity and flexibility are good, and the technical problems of poor flowability and difficult plasticizing of polyvinyl chloride are solved.

Description

technical field [0001] The invention relates to a PVC injection compound, in particular to a flame-retardant high-elasticity PVC injection compound. Background technique [0002] PVC injection molding is deeply loved by the industry because of its unique high fluidity characteristics and excellent appearance. Its excellent price advantage often wins the industry's first choice, so PVC injection molding products are very popular in various fields. See. However, if PVC wants to be soft, it needs to add a large amount of liquid oil plasticizer, which will greatly reduce the flame retardancy. If you want to obtain high elasticity, you must use a high degree of polymerization PVC elasticity while adding a large amount of plasticizer. Resin, the problem of high-polymerization elastic resin itself is that it is difficult to plasticize and has poor fluidity, which leads to appearance defects such as flow lines, silver streaks, white spots, and cracks in injection molded parts, whic...

Claims

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Application Information

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IPC IPC(8): C08L27/06C08L23/28C08L9/02C08L25/08C08K5/12C08K5/098C08K5/13C08K5/06
Inventor 赵亚琼
Owner ZHEJIANG WELLSCOM PLASTIC CO LTD