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A technology for sealing tapes and vacuum bags, applied in the direction of adhesives, film/sheet adhesives, non-polymer adhesive additives, etc. The effect of value, good high temperature performance and process performance
Inactive Publication Date: 2013-09-11
INST OF PETROCHEM HEILONGJIANG ACADEMY OF SCI
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Problems solved by technology
[0004] In order to solve the problem of poor high temperature resistance of the existing vacuum bag sealing tape, the present invention provides a silicone vacuum bag sealing tape
Method used
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specific Embodiment approach 1
[0015] Specific embodiment 1: In this embodiment, the silicone vacuum bag sealing tape consists of 100 parts by mass of silicone rubber, 20-70 parts of reinforcing filler, 0.5-3.0 parts of high-temperature vulcanizing agent, 0-100 parts of inert filler, and 0 parts of heat stabilizer. ~15 parts and 5~20 parts of structure control agent;
[0016] Wherein said silicone rubber is methyl phenyl vinyl silicone rubber or methyl vinyl silicone rubber;
[0017] The reinforcing filler is one or more combinations of precipitated silica, fumed silica, and dimethylpolysiloxane-modified fumed silica;
[0018] Described high-temperature curing agent is 2,5-dimethyl-2,5-bis(tert-butyl peroxy)hexane, dicumyl peroxide, 2,4-dichlorobenzoyl peroxide, A combination of one or more of benzoyl peroxide, tert-butyl perbenzoate, and di-tert-butyl peroxide;
[0019] The inert filler is one or more of mica, silicon micropowder, diatomaceous earth, zinc oxide, titanium dioxide, calcium carbonate, quart...
specific Embodiment approach 2
[0024] Embodiment 2: This embodiment differs from Embodiment 1 in that the molecular weight of the silicone rubber is 450,000 to 800,000. Other ingredients are the same as in Embodiment 1.
specific Embodiment approach 3
[0025] Embodiment 3: This embodiment is different from Embodiment 1 or Embodiment 2 in that the silicone resin is methylphenylvinyl silicone rubber. Other compositions are identical with specific embodiment one or two.
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Abstract
The invention provides an organosilicone sealing tape for a vacuum bag, relates to a sealing tape for the vacuum bag, and aims at solving the problem of poor resistance to high temperature of an existing sealing tape for the vacuum bag. The organosilicone sealing tape for the vacuum bag is prepared from the following components in parts by mass: 100 parts of silicon rubber, 20 to 70 parts of reinforcing filler, 0.5 to 3.0 parts of high-temperature vulcanizing agent, 0 to 100 parts of inert filler, 0 to 15 parts of heat stabilizer, and 5 to 20 parts of constitution controller. The result of an aging test carried out for 4 hours at 350 DEG C shows that the prepared organosilicone sealing tape for the vacuum bag is free of embrittlement and flowing, can be integrally stripped, has the maximum temperature of 380 DEG C while the weight-loss ratio is 5%, and is high in resistance to high temperature and processing performance. The organosilicone sealing tape for the vacuum bag is mainly applicable to the field of sealing tape materials for the vacuum bags.
Description
technical field [0001] The invention relates to a vacuum bag sealing tape. Background technique [0002] Vacuum Assisted Resin Transfer Molding (VARTM) is a molding technology for preparing large composite parts. In the molding process of composite materials in the fields of fan blades and aircraft manufacturing, it is necessary to use the fluidity and penetration of resin in a vacuum state. To achieve its effective impregnation of fibers, it is generally solidified and formed under heating conditions. The role of vacuum bag sealing tape is usually to adhere and fix the vacuum bag on the mold, and to play a sealing role during the vacuum introduction process. With the improvement of the performance of composite materials, the molding temperature is getting higher and higher, which puts forward higher requirements for the heat resistance and process performance of the vacuum bag sealant. [0003] The Chinese patent with the application number 200910195304.7 and the patent n...
Claims
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Application Information
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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/00C09J183/07C09J11/04
Inventor 张斌张绪刚刘彩召孙明明李坚辉薛刚王磊赵明李奇力
Owner INST OF PETROCHEM HEILONGJIANG ACADEMY OF SCI
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