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A kind of pvc/nbr thermoplastic elastomer for anti-mixed mold automotive seals and preparation method

A thermoplastic elastomer, anti-mixing technology, applied in the field of thermoplastic elastomers, can solve the problems of deterioration, material performance reduction, easy to breed mold, bacteria, etc., to achieve good dispersion, excellent light resistance and heat aging resistance, excellent Effects against the growth of mixed molds

Active Publication Date: 2018-02-02
WUXI ACP STEEL CORE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantages of this material are: since PVC will use a large amount of epoxy esters, phthalates and aliphatic dibasic esters in the plasticization process, they often become the source of nutrition for microorganisms, so under certain climatic conditions (High temperature, high humidity) It is easy to breed mold and bacteria, and as a result, the performance of the material is reduced and deteriorated. With the technological progress and development of the domestic automobile industry, it is urgent to improve the anti-mold performance of the material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The preparation method of the anti-mixing mold PVC / NBR thermoplastic elastomer material for automobile seals is realized through the following steps:

[0026] 1) Measure the following material components in parts by weight: 100 parts of PVC resin, 50 parts of plasticizer, 5 parts of active ground calcium carbonate powder, 1 part of pigment carbon black, 3 parts of calcium-zinc composite stabilizer, antioxidant 0.1 part of UV absorber (1046), 0.1 part of ultraviolet absorber (UV-P), 3 parts of processing aid (K-125P), 10 parts of nitrile rubber powder (NBR (P83), 0.1wt% nano-silver material loaded with carbon black 0.1 part. The 50 parts of plasticizer are composed of 20 parts of dioctyl phthalate, 8 parts of dioctyl adipate, 6 parts of epoxidized soybean oil, and 16 parts of diisodecyl phthalate.

[0027] 2) First, mix the pigment carbon black and the carbon black-loaded nano-silver material evenly, then mix the mixed carbon black with the measured PVC resin, active gr...

Embodiment 2

[0034] The preparation method of the anti-mixing mold PVC / NBR thermoplastic elastomer material for automobile seals is realized through the following steps:

[0035] 1) Measure the following material components in parts by weight: 100 parts of PVC resin, 100 parts of plasticizer, 20 parts of active ground calcium carbonate powder, 2 parts of pigment carbon black, 5 parts of calcium-zinc composite stabilizer, antioxidant 0.5 parts of UV absorber (1046), 0.5 parts of ultraviolet absorber (UV-P), 6 parts of processing aid (K-125P), 50 parts of nitrile rubber powder (P83), 1.0 parts of nano-silver material loaded with 1.0wt% carbon black . The 100 parts of plasticizer consist of 36 parts of dioctyl phthalate, 18 parts of dioctyl adipate, 10 parts of epoxidized soybean oil, and 36 parts of diisodecyl phthalate.

[0036] 2) Material processing steps and methods are as in Example 1.

[0037] Above-mentioned carbon black loading 0.1wt% nano-silver material is made by following proce...

Embodiment 3

[0041]The composition and preparation method of the comparative material are basically the same as those in Example 1, except that 0.1 part of carbon black-loaded nano-silver material is replaced by 0.1 part of phosphate glass-loaded zinc antibacterial agent + isothiazolinone. The prepared comparative material was subjected to the anti-mixed mold test according to the GM9328P-1989 standard. The experimental result is 0 / TG, that is, 0mm inhibition area / growth trace, and the growth range is <10%.

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Abstract

The invention relates to a preparation method of a PVC / NBR thermoplastic elastomer for a mixed mould prevention vehicle sealing element. PVC resin with the polymerization degree being larger than or equal to 1300 and powdery NBR serve as base resin, dioctyl phthalate, dioctyl adipate, epoxy soybean oil and di-iso-decylphthalate serve as plasticizer, and various stabilizers, antioxidants and ultraviolet absorbents are also used; a carbon black loaded nano silver material and main components are evenly mixed, and growth of mixed mould is inhibited by the PVC / NBR thermoplastic elastomer material for the vehicle sealing element; the carbon black loaded nano silver material is prepared through the equivalent-volume impregnation method, wherein the silver loading amount is 0.1-1.0 wt%, and the grain size range of nano silver is 100-500 nm. The obtained elastomer material obtained through mixing, extrusion, plastification and granulation has excellent physical and chemical properties and also has an excellent mixed mould growth prevention effect.

Description

technical field [0001] The invention relates to the technical field of thermoplastic elastomers, in particular to a PVC / NBR thermoplastic elastomer material for extrusion and injection molding used for preventing mixed mold growth of automobile seals and a preparation method thereof. Background technique [0002] PVC / NBR thermoplastic elastomer material is a PVC resin with a polymerization degree greater than 1300. After being modified by a plasticizer and NBR, it has good physical and chemical properties. The manufacture of triangular windows is an important component material that is indispensable for automobile waterproof, dustproof and sound insulation. However, the disadvantages of this material are: since PVC will use a large amount of epoxy esters, phthalates and aliphatic dibasic esters in the plasticization process, they often become the source of nutrition for microorganisms, so under certain climatic conditions (High temperature, high humidity) It is easy to bree...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/06C08L9/02C08L91/00C08K13/06C08K9/12C08K3/04C08K3/28C08K5/12C08K5/11C08K3/26B29C47/92B29C48/92
CPCB29C48/92B29C2948/92704C08K2201/003C08K2201/011C08K2201/014C08L27/06C08L2201/08C08L2201/14C08L2205/035C08L9/02C08L91/00C08K13/06C08K9/12C08K3/04C08K3/28C08K5/12C08K5/11C08K2003/265
Inventor 任洪毛雅娟唐伟菊
Owner WUXI ACP STEEL CORE
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