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CN-121991511-A - Composite elastomer material, preparation method and application

CN121991511ACN 121991511 ACN121991511 ACN 121991511ACN-121991511-A

Abstract

The invention relates to the technical field of elastomer materials, and discloses a composite elastomer material, a preparation method and application thereof, wherein the raw materials of the composite elastomer material comprise 30-60 parts by weight of silicone rubber masterbatch, 40-70 parts by weight of siloxane grafted POE, 0.15-0.3 part by weight of platinum catalyst and the like, the compatibility between POE and silicone rubber is good, the POE and the silicone rubber form a uniform disperse phase, the advantages of vinyl elastomer and silicone rubber elastomer can be achieved, the composite elastomer material has higher tensile strength and elongation at break, the POE is grafted with a heat-decomposition mass loss temperature containing high-temperature resistant phenyl phthalimide ring structure, the POE and the composite elastomer material are favorable for improving the heat resistance, and the composite elastomer material has excellent heat resistance and good practical application in the aspect of automobile wire harness sheath materials.

Inventors

  • WEN JIANGHE
  • WANG WEN

Assignees

  • 广州仕天材料科技有限公司

Dates

Publication Date
20260508
Application Date
20260130

Claims (9)

  1. 1. The composite elastomer material is characterized by comprising the following raw materials of 30-60 parts by weight of silicone rubber masterbatch, 40-70 parts by weight of siloxane grafted POE, 0.15-0.3 part by weight of platinum catalyst and 0.4-0.8 part by weight of antioxidant; Adding POE ethylene-octene copolymer and vinyl siloxane monomer into toluene, stirring, heating to a reaction temperature in nitrogen atmosphere, adding dibenzoyl peroxide, adding ethanol for precipitation after reaction, filtering, placing the precipitate in a Soxhlet extractor, and extracting and purifying to obtain the siloxane grafted POE; the structural formula of the vinyl siloxane monomer is 。
  2. 2. The composite elastomer material according to claim 1, wherein the POE ethylene-octene copolymer is used in an amount of 100 parts by weight, the vinyl siloxane monomer is used in an amount of 8 to 15 parts by weight, and dibenzoyl peroxide is used in an amount of 0.4 to 0.8.2 parts by weight.
  3. 3. The composite elastomeric material of claim 1, wherein the reaction temperature is 70-90 ℃ and the reaction time is 12-24 hours.
  4. 4. The composite elastomer material according to claim 1, wherein the preparation method of the silicone rubber masterbatch comprises the steps of adding 100 parts by weight of methyl vinyl silicone rubber, 25-40 parts by weight of white carbon black, 3-5 parts by weight of hydroxyl silicone oil and 2.2-3.8 parts by weight of hydrogen-containing silicone oil into a torque rheometer, and mixing for 20-30min at 180-195 ℃ to obtain the silicone rubber masterbatch.
  5. 5. The composite elastomer material according to claim 1, wherein the preparation method of the vinyl siloxane monomer comprises the steps of adding triethylamine and N- (4-hydroxyphenyl) phthalimide into a reaction solvent, dropwise adding methyl vinyl dichlorosilane into an ice-water bath, then carrying out reaction at 40-50 ℃ for 18-24 hours, distilling the solution under reduced pressure, and separating the product by silica gel column chromatography to obtain the vinyl siloxane monomer.
  6. 6. The composite elastomeric material of claim 5, wherein said reaction solvent is toluene or N, N-dimethylformamide.
  7. 7. The composite elastomer material according to claim 5, wherein the amount of triethylamine is 144-158 parts by weight, the amount of N- (4-hydroxyphenyl) phthalimide is 340-410 parts by weight, and the amount of methylvinyldichlorosilane is 100 parts by weight.
  8. 8. A method for preparing the composite elastomer material according to any one of claims 1 to 7, wherein the preparation method comprises the steps of adding siloxane grafted POE into a torque rheometer, plasticating at 180-190 ℃, adding silicone rubber masterbatch, platinum catalyst and antioxidant, mixing for 5-8min, and discharging to obtain the composite elastomer material.
  9. 9. Use of the composite elastomer material obtained by the preparation method according to claim 8 in an automotive harness sheath.

Description

Composite elastomer material, preparation method and application Technical Field The invention relates to the technical field of elastomer materials, in particular to a composite elastomer material, a preparation method and application. Background The thermoplastic elastomer material is a rubber composite material with excellent performance, and mainly consists of plastics and rubber, such as polyurethane/silicone rubber elastomer, POE/silicone rubber elastomer, EPDM/polypropylene elastomer and the like. The POE/silicone rubber composite elastomer material has high hardness, good toughness and strong wear resistance, and can be widely applied to shoe materials, sports equipment, wires and cables, automobile sealing strips and the like. The mechanical property, the heat resistance and other properties of the POE/silicone rubber material are improved, and the practical application of the POE/silicone rubber material in the fields of automobile industry and the like is facilitated to be expanded. Patent publication number CN104177692B discloses that the cross-linking material for the battery charging interface cable of the electric automobile prepared by taking methyl vinyl silicone rubber, POE, polyethylene, polypropylene and the like as raw materials has excellent high and low temperature resistance, but the POE ethylene-octene copolymer and the silicone rubber have poor compatibility, poor dispersibility when being blended, and defects exist between phase interfaces, which can influence the toughness, heat resistance and the like of the cross-linking material. Disclosure of Invention Aiming at the defects of the prior art, the invention provides a composite elastomer material and a preparation method thereof, solves the problems of low mechanical property and poor high temperature resistance of a silicone rubber-POE elastomer, and can have the advantages of a vinyl elastomer and a silicone rubber elastomer. In order to solve the technical problems, the invention adopts the technical scheme that the composite elastomer material and the preparation method thereof comprise the following raw materials of 30-60 parts by weight of silicone rubber masterbatch, 40-70 parts by weight of siloxane grafted POE, 0.15-0.3 part by weight of platinum catalyst and 0.4-0.8 part by weight of antioxidant. The preparation method of the composite elastomer material comprises the following steps: (1) Adding POE ethylene-octene copolymer and vinyl siloxane monomer into toluene, stirring, heating to reaction temperature in nitrogen atmosphere, adding dibenzoyl peroxide, reacting, adding ethanol for precipitation, filtering, placing the precipitate into a Soxhlet extractor, extracting and purifying with acetone to obtain siloxane grafted POE. (2) Adding the siloxane grafted POE into a torque rheometer, plasticating at 180-190 ℃, then adding the silicone rubber masterbatch, the platinum catalyst and the antioxidant, mixing for 5-8min, and discharging to obtain the composite elastomer material. Preferably, the POE ethylene-octene copolymer is used in an amount of 100 parts by weight, the vinyl siloxane monomer is used in an amount of 8 to 15 parts by weight, and the dibenzoyl peroxide is used in an amount of 0.4 to 0.8.2 parts by weight. Preferably, the reaction temperature in (1) is 70-90 ℃ and the reaction time is 12-24 hours. Preferably, the preparation method of the silicone rubber masterbatch comprises the following steps of adding 100 parts by weight of methyl vinyl silicone rubber, 25-40 parts by weight of white carbon black, 3-5 parts by weight of hydroxyl silicone oil and 2.2-3.8 parts by weight of hydrogen-containing silicone oil into a torque rheometer, and mixing for 20-30min at 180-195 ℃ to obtain the silicone rubber masterbatch. Preferably, the preparation method of the vinyl siloxane monomer comprises the steps of adding triethylamine and N- (4-hydroxyphenyl) phthalimide into a reaction solvent, dropwise adding methyl vinyl dichlorosilane into an ice-water bath, then carrying out reaction at 40-50 ℃ for 18-24 hours, distilling the solution under reduced pressure, and separating the product by silica gel column chromatography to obtain the vinyl siloxane monomer. Preferably, the reaction solvent is toluene or N, N-dimethylformamide. Preferably, the amount of triethylamine is 144 to 158 parts by weight, the amount of N- (4-hydroxyphenyl) phthalimide is 340 to 410 parts by weight, and the amount of methylvinyldichlorosilane is 100 parts by weight. Preferably, the composite elastomeric material is applied in automotive wire harness sheathing applications. The preparation method has the beneficial technical effects that vinyl siloxane monomer containing alkenyl is subjected to solution grafting on POE, and then is mixed with silicone rubber masterbatch and the like to obtain the composite elastomer material. The polymer molecular chain containing the siloxane structure is introduced into the POE molecular chain, so that the