A preparation method of radiation-crosslinked oil-resistant heat-shrinkable material
A technology of radiation cross-linking and oil resistance, which is applied in the field of preparation of radiation cross-linking oil-resistant heat-shrinkable materials to achieve good oil resistance, solve poor oil resistance, and maintain better elongation at break
Inactive Publication Date: 2017-05-17
TECHN PHYSICS INST HEILONGJIANG ACADOF SCI
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Problems solved by technology
[0003] The present invention aims to solve the technical problem that the current radiation cross-linked oil-resistant heat-shrinkable material cannot simultaneously meet the technical problems of high oil resistance, aging resistance, high strength and good flexibility, and provides a preparation method of radiation cross-linked oil-resistant heat-shrinkable material
Method used
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Experimental program
Comparison scheme
Effect test
specific Embodiment approach 1
[0014] Embodiment 1: This embodiment is a radiation crosslinking oil-resistant heat-shrinkable material, which consists of 40 to 60 parts by weight of nitrile rubber, 30 to 50 parts of ethylene-vinyl acetate copolymer, 0 parts ~20 parts of chlorinated polyethylene, 1~3 parts of antioxidant, 3~5 parts of zinc oxide, 1~2 parts of stearic acid, 5~15 parts of carbon black, 10~60 parts 1 part of flame retardant, 1 part to 3 parts of auxiliary crosslinking agent and 4 parts to 6 parts of plasticizer.
specific Embodiment approach 2
[0015] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the mass fraction of acrylonitrile in the nitrile rubber is 34%-46%. Others are the same as the first embodiment.
specific Embodiment approach 3
[0016] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the mass fraction of vinyl acetate in the ethylene-vinyl acetate copolymer is 14% to 22%. Others are the same as those in Embodiment 1 or 2.
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Abstract
The invention relates to a radiation-crosslinked oil-resistant thermal shrink material and a preparation method thereof. According to the radiation-crosslinked oil-resistant thermal shrink material, the technical problem that the current radiation-crosslinked oil-resistant thermal shrink material does not have high oil resistance, ageing resistance, high strength and relatively good flexibility simultaneously is solved. The radiation-crosslinked oil-resistant thermal shrink material comprises nitrile rubber, an ethylene-vinyl acetate copolymer, chlorinated polyethylene, an antioxidant, zinc oxide, stearic acid, carbon black, a flame retardant, a crosslinking aid and a plasticizer. The preparation method comprises the following steps: (1) mixing and granulating; (2) extruding particles granulated in the step (1) into a tubular material; (3) carrying out electron beam radiation crosslinking on the tubular material by virtue of an electron accelerator; and (4) heating the tubular material in an infrared heating tank, radially expanding the heated tubular material by virtue of an expansion machine, cooling and shaping by virtue of water, and trimming the tubular material by virtue of a slicer. The preparation method is applied to the preparation of the radiation-crosslinked oil-resistant thermal shrink material.
Description
technical field [0001] The invention relates to a preparation method of a radiation-crosslinked oil-resistant heat-shrinkable material. Background technique [0002] Generally speaking, rubber materials have a low glass transition temperature, and it is difficult to prepare heat-shrinkable materials at room temperature. However, in order to utilize some properties of rubber, rubber and thermoplastic resins must be blended to prepare heat-shrinkable materials. At present, the existing oil-resistant heat-shrinkable materials are mainly VITON oil-resistant heat-shrinkable tubes with fluororubber as the main raw material and DR oil-resistant heat-shrinkable tubes with special rubber as raw materials. expensive. At present, relevant patents such as: Chinese patent CN103044744A use ethylene, ethylene-vinyl acetate copolymer and ethylene terpolymer to prepare semi-hard oil-resistant heat-shrinkable materials, which have high hardness but low strength, and have limitations in their...
Claims
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Patent Timeline
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IPC IPC(8): C08L9/02C08L23/08C08L23/28C08K13/06C08K9/06C08K3/22C08K5/09C08K3/04C08K5/103C08K5/12C08J3/24C08J3/28B29C35/08
Inventor 张玉宝梁宏斌斯琴图雅赵弘韬刘宇光王强杨仲秋赵孝文
Owner TECHN PHYSICS INST HEILONGJIANG ACADOF SCI