CN104761903A - Nano-mullite fiber-doped high-heat-resistant silicone rubber cement used for preparing ultrathin rubber sealing layer and preparation method thereof - Google Patents
Nano-mullite fiber-doped high-heat-resistant silicone rubber cement used for preparing ultrathin rubber sealing layer and preparation method thereof Download PDFInfo
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- CN104761903A CN104761903A CN201510115205.9A CN201510115205A CN104761903A CN 104761903 A CN104761903 A CN 104761903A CN 201510115205 A CN201510115205 A CN 201510115205A CN 104761903 A CN104761903 A CN 104761903A
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Abstract
The invention relates to the field of silicone rubber composite processing and particularly relates to a nano-mullite fiber-doped high-heat-resistant silicone rubber cement used for preparing ultrathin rubber sealing layer and preparation method thereof. The silicone rubber cement is prepared from following raw materials, by weight: 5-8 parts of an acetic acid-vinyl acetate co-polymer, 20-25 parts of raw rubber of silicone rubber, 25-32 parts of methylbenzene, 3-5 parts of nano-mullite fibers, 0.1-0.2 parts of a defoaming agent, 0.5-1 part of 2,5-dimethyl-2,5-bis(tert-butyl-peroxyl)hexane, 0.5-0.8 parts of maleic anhydride, 0.1-0.2 parts of an adhesive 2260, 10-15 parts of cyclohexane, 5-8 parts of ceramic micro-powder, 3-5 parts of a color master batch, 0.1-0.2 parts of an anti-oxidizing agent, and 0.2-0.3 parts of vinyltrimethoxyl silane. The silicone rubber cement is high in viscosity, is fine and foam-free, is good in thixotropy, is convenient to use in silk-screen printing, allows the thickness of a vulcanized rubber layer to be decreased to 0.05 mm, and enables the rubber layer to be thin but excellent in strength and toughness, to be improved further in heat resistance, to be durable in sealing effects and to be excellent in sealing performance on oil materials, liquids and such fluids.
Description
Technical field
The present invention relates to silicon rubber Compound Machining field, be specifically related to a kind of dopen Nano mullite fiber height heat-resistant silicon rubber rubber cement for the preparation of Ultrathin sealed rubber layer and preparation method thereof.
Background technology
Ultra-thin rubber layer packing technique refers to that one is produced on the sealing member production technology of the upper ultra-thin rubber bodies of sulfuration of skeleton (metal sheet etc.).This product surface has very thin, the rubber layer of bonding by Vulcanization, sealed muscle is made on the surface of this layer of vulcanized rubber or edge, make it to oil plant, the fluids such as liquid produce sealing function, ultra-thin rubber layer wherein assembles fastening reliability and has more advantage than traditional part, fastening better reliability is assembled under equal moment of torsion, failure conditions reduces, effectively alleviate the weight of overall spare and accessory parts, than traditional sealing member, there is apparent advantage, and the ultra-thin rubber layer developing excellent property becomes the vital link of this ultra-thin rubber layer packing technique use properties kind of guarantee.
Silicon rubber has the advantages such as Nai Gaore, cold-resistant, good toughness, environmental protection and is widely adopted in the seal, but confirm through experimental result repeatedly, when preparing ultra-thin silicon glue-line, common solid silicone has following shortcoming: (1) premolding silica gel part is difficult to control, pendulum glue difficulty, production efficiency is low, be unfavorable for batch productization, the product layer of silica gel thickness that (2) are made exceeds, and can not reach design requirements; Liquid silica gel is used also to have following shortcoming: (1) liquid silica gel is made up of body and two, solidifying agent, can mix before using, need use within the regular hour, not so can solidify and lose use value, (2) ultra-thin rubber seal technology needs to make sealed muscle on rubber layer, and just can not it be machined after it has solidified, do not reach design requirements, (3) low strength of liquid silica gel, it weakens the sealing function of the fluid such as oil plant, liquid.Therefore, in order to the silastic-layer of the excellent ultrathin of processability, need to need on from raw material to technique to make further improvement.
Summary of the invention
The object of the invention is to, a kind of dopen Nano mullite fiber height heat-resistant silicon rubber rubber cement for the preparation of Ultrathin sealed rubber layer and preparation method thereof is provided, this modified silicon rubber rubber cement improves mechanical property and the processing characteristics of traditional silicon rubber, the thin layer rubber Heat-resistant stable obtained after sulfuration, sealing effectiveness is stable lasting; To achieve these goals, the technical solution used in the present invention is as follows:
A kind of dopen Nano mullite fiber height heat-resistant silicon rubber rubber cement for the preparation of Ultrathin sealed rubber layer and preparation method thereof, it is characterized in that, described silicon rubber cement is made up of the raw material of following weight part: acetic acid-vinyl acetate copolymer 5-8, silica gel rubber 20-25, toluene 25-32, nano mullite fiber 3-5, defoamer 0.1-0.2, two two or five vulcanizing agent 0.5-1, maleic anhydride 0.5-0.8, caking agent 2260 0.1-0.2, hexanaphthene 10-15, ceramic 5-8, colour batch 3-5, oxidation inhibitor 0.1-0.2, vinyltrimethoxy silane 0.2-0.3;
The preparation method of described silicon rubber cement is:
(1) first nano mullite fiber is mixed with ceramic, mixture is warming up to 500-600 DEG C with the temperature rise rate of 5-8 DEG C/min, room temperature is cooled to this understanding after roasting 4-5h, microscale powder must be activated, subsequently mixed powder and maleic anhydride, vinyltrimethoxy silane mixed grinding are dropped in hexanaphthene after disperseing 20-30min, add acetic acid-vinyl acetate copolymer again, obtain mixed slurry after being uniformly mixed 50-60min for subsequent use;
(2) silica gel rubber is dropped in toluene solution, be stirred to after it dissolves completely, add step (1) gained mixed slurry, after continuing to be uniformly mixed 30-40min, add other leftover materials, be stirred to material and mix completely and get final product.
The modified silicon rubber rubber cement that the present invention prepares possesses following advantage:
(1) the nano mullite Fiber-Ceramic micro mist micro-scale filler of the surface grafting maleic anhydride, adulterated in rubber cement, activation homogenate is formed in advance in hexanaphthene, improve the consistency between raw material and reactive behavior, improve silicon rubber use properties efficiently, obtained rubber cement viscosity is high, fine and smooth still, thixotropy is good, and the mode of silk screen printing can be adopted to realize mass production.
(2), rubber cement retention period is long, can not lose use value because of solidification, and silk-screen remains silica gel and can collect and reuse, and material use efficiency is high.
(3) do not affect sulfidation after, by modes such as bakings making the organic solvent volatilizations such as toluene, can reprocess.
(4), after sulfuration layer of silica gel thickness can be low to moderate 0.05mm, and have excellent intensity and toughness though thin, resistance toheat improves further, and sealing effectiveness is lasting, has excellent sealing function to the fluid such as oil plant, liquid.
Embodiment
Embodiment
The rubber cement of the present embodiment is made up of the raw material of following weight part: acetic acid-vinyl acetate copolymer 6, silica gel rubber 24, toluene 28, nano mullite fiber 4, defoamer 0.2, two two or five vulcanizing agents 0.8, maleic anhydride 0.6, caking agent 2,260 0.1, hexanaphthene 13, ceramic 7, colour batch 4, oxidation inhibitor 0.1, vinyltrimethoxy silane 0.3.
The preparation method of this rubber cement is:
(1) first nano mullite fiber is mixed with ceramic, mixture is warming up to 500-600 DEG C with the temperature rise rate of 5-8 DEG C/min, room temperature is cooled to this understanding after roasting 5h, microscale powder must be activated, subsequently mixed powder and maleic anhydride, vinyltrimethoxy silane mixed grinding are dropped in hexanaphthene after disperseing 30min, add acetic acid-vinyl acetate copolymer again, obtain mixed slurry after being uniformly mixed 55min for subsequent use;
(2) silica gel rubber is dropped in toluene solution, be stirred to after it dissolves completely, add step (1) gained mixed slurry, after continuing to be uniformly mixed 40min, add other leftover materials, be stirred to material and mix completely and get final product.
The performance test results of the thick rubber layer of 0.05mm that the rubber cement obtained by the present embodiment is formed is:
Test item | Detected result |
Shore hardness (degree) | 66 |
Tensile strength at yield (MPa) | 7.3 |
Elongation at break (%) | 313 |
100% tensile modulus (MPa) | 2.0 |
Compression set rate (22h × 175 DEG C) | 14.3% |
Low-temperature test (-25 DEG C × 3min) | Without damaged |
Oil resistant test (resistance to 903 tests, 150 DEG C × 70h):
Changes in hardness (degree) | -4 |
Tensile strength at yield velocity of variation (%) | -5.6% |
Elongation at break velocity of variation (%) | -11.2% |
Volume change (%) | 5.6% |
Hot air burn-in test (175 DEG C × 168h):
Changes in hardness (degree) | 2 |
Tensile strength at yield velocity of variation (%) | 2.3% |
Elongation at break velocity of variation (%) | -6.8% |
Claims (2)
1. dopen Nano mullite fiber height heat-resistant silicon rubber rubber cement for the preparation of Ultrathin sealed rubber layer and preparation method thereof, it is characterized in that, described modified silicon rubber rubber cement is made up of the raw material of following weight part: acetic acid-vinyl acetate copolymer 5-8, silica gel rubber 20-25, toluene 25-32, nano mullite fiber 3-5, defoamer 0.1-0.2, two two or five vulcanizing agent 0.5-1, maleic anhydride 0.5-0.8, caking agent 2260 0.1-0.2, hexanaphthene 10-15, ceramic 5-8, colour batch 3-5, oxidation inhibitor 0.1-0.2, vinyltrimethoxy silane 0.2-0.3.
2. a kind of dopen Nano mullite fiber height heat-resistant silicon rubber rubber cement for the preparation of Ultrathin sealed rubber layer and preparation method thereof as claimed in claim 1, its preparation method is:
(1) first nano mullite fiber is mixed with ceramic, mixture is warming up to 500-600 DEG C with the temperature rise rate of 5-8 DEG C/min, room temperature is cooled to this understanding after roasting 4-5h, microscale powder must be activated, subsequently mixed powder and maleic anhydride, vinyltrimethoxy silane mixed grinding are dropped in hexanaphthene after disperseing 20-30min, add acetic acid-vinyl acetate copolymer again, obtain mixed slurry after being uniformly mixed 50-60min for subsequent use;
(2) silica gel rubber is dropped in toluene solution, be stirred to after it dissolves completely, add step (1) gained mixed slurry, after continuing to be uniformly mixed 30-40min, add other leftover materials, be stirred to material and mix completely and get final product.
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105542253A (en) * | 2016-01-20 | 2016-05-04 | 苏州市景荣科技有限公司 | NBR composite sole material for steel-smelting shoes and preparation method of NBR composite sole material |
CN111039681A (en) * | 2018-10-14 | 2020-04-21 | 天津大学青岛海洋技术研究院 | Simple method for preparing mullite fiber-based porous heat insulation tile |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN103509348A (en) * | 2013-08-30 | 2014-01-15 | 安徽天民电气科技有限公司 | Fire-resistant silicone rubber cable material and preparation method thereof |
CN103600530A (en) * | 2013-11-18 | 2014-02-26 | 航天特种材料及工艺技术研究所 | Elastic heat-insulation sealing material and preparation method thereof |
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2015
- 2015-03-16 CN CN201510115205.9A patent/CN104761903A/en active Pending
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CN103509348A (en) * | 2013-08-30 | 2014-01-15 | 安徽天民电气科技有限公司 | Fire-resistant silicone rubber cable material and preparation method thereof |
CN103600530A (en) * | 2013-11-18 | 2014-02-26 | 航天特种材料及工艺技术研究所 | Elastic heat-insulation sealing material and preparation method thereof |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105542253A (en) * | 2016-01-20 | 2016-05-04 | 苏州市景荣科技有限公司 | NBR composite sole material for steel-smelting shoes and preparation method of NBR composite sole material |
CN105542253B (en) * | 2016-01-20 | 2019-01-11 | 苏州市景荣科技有限公司 | A kind of steel-making shoes NBR composite sole material and preparation method thereof |
CN111039681A (en) * | 2018-10-14 | 2020-04-21 | 天津大学青岛海洋技术研究院 | Simple method for preparing mullite fiber-based porous heat insulation tile |
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Application publication date: 20150708 |