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Fluorine silicon mixed making rubber and preparation method thereof
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A technology of mixing rubber and fluorosilicone raw rubber, which is applied in the field of fluorosilicone mixing rubber and its preparation, and achieves the effect of excellent performance
Active Publication Date: 2011-08-31
ZHEJIANG HUANXIN FLUORO MATERIAL
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[0009] The present invention aims at the defects existing in the fluorosilicone compound rubber obtained by mixing a single raw rubber in the prior art. The first purpose of the present invention is to provide a new type of fluorosilicone base rubber for mixing fluorosilicone rubber compound
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Embodiment 1
[0050] Put 100 parts by weight of fluorosilicone raw rubber into the open mill, adjust the roller distance until there is a small amount of glue between the two rollers, and then add 4 parts by weight of methyl vinyl silicone rubber, and the specific surface area of 45 parts by weight is 200m 2 / g of fumed silica treated with hexamethyldisilazane, 8 parts by weight of hydroxyfluorosilicone oil, 5 parts by weight of heat stabilizer iron oxide red, mixing for 20 to 30 minutes, and then adjusting the roll distance to 0.4 After ~0.6 mm thin pass 10 times, 1 part by weight of 2.5-dimethyl-2.5 bis(tert-butylperoxy)hexane was added. The roller temperature is controlled at 50±5°C, the mixing time is 20-30 minutes, and the thickness is adjusted to be suitable for sheet production. Carry out one-stage vulcanization at 170°C×10min in the flat vulcanizer, and two-stage vulcanization at 200°C×4h, and test the samples.
Embodiment 2
[0052] ① Take 2000g of raw rubber A and raw rubber B in a ratio of 4:6, 40g of methyl vinyl silicone rubber, and an appropriate amount of release agent;
[0053] ②White carbon black 900g, "structural" control agent hydroxyfluorosilicone oil 60g, dimethoxy polytrifluoropropyl methylsiloxane 30g, "concentrated crosslinking agent" vinyl fluorosilicone oil (1) 60g, once or Add to the kneader in batches, and knead evenly at a temperature of 60°C to form a dough;
[0054] ③Raise the temperature to 130°C, knead heat treatment at -0.08~-0.09Mpa for 1 hour under vacuum, the glue will come out below 100°C, and store for 24 hours; no glue will be glued during kneading heat treatment;
[0055] ④After 7 times of re-refining and thinning, extrude and filter with 150 mesh;
[0056] There is no "structural" phenomenon after the rubber is stored for 12 months;
[0057] ⑤Add 1 part by weight of vulcanizing agent [2.5-dimethyl-2.5 bis(tert-butylperoxy)hexane] and iron oxide red to the prepared...
Embodiment 3
[0059] Repeat the steps described in Example 2, changing the raw rubber to raw rubber A and raw rubber B at a ratio of 2:8 to take a total of 2000 g. Knead into a dough at a temperature of 30°C, raise the temperature to 140°C, vacuumize and knead and heat-treat for 0.5 hours, and keep the rubber for 36 hours.
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Abstract
The invention discloses fluorinesilicon mixed making rubber and a preparation method thereof. Fluorinesilicon basic rubber for preparing the mixed making rubber consists of fluorinesilicon crude rubber A and fluorine silicon crude rubber B. The preparation method comprises the following steps of: adding methyl vinyl silicon rubber, a heat stabilizer, white carbon black treated by 3,3,3-trifluoropropylmethyl cyclotrisiloxane, a structure controlling agent and a concentrated cross-linking agent into the fluorine silicon basic rubber; adding the materials into a kneading machine; kneading the materials at the temperature of between 30 and 80 DEG C to form balls; heating the balls to 130 to 140 DEG C; performing vacuum kneading for 0.5 to 3 hours; discharging at the temperature of 100 DEG C; standing for 24 to 36 hours; performing back mixing and thin through; and extruding and filtering to obtain the fluorine silicon mixed making rubber. In the prepared fluorine silicon mixed making rubber, tensile strength is 11 to 13 MPa; breakage elongating ratio is 300 to 500 percent; tearing strength is 45 to 55 kN / m; and the tensile strength is 7 to 8 MPa after the fluorine silicon mixed making rubber is soaked with FAM-A oil (23 DEG C*48h).
Description
[0001] technical field [0002] The invention relates to a fluorine-silicon compound rubber with high tensile strength, high tear strength and excellent wear resistance and a preparation method thereof. Background technique [0003] Fluorosilicone rubber has excellent high and low temperature resistance, oil resistance, solvent resistance and chemical resistance. A new type of low temperature sealing material and fuel oil hose. [0004] Fluorosilicone rubber is a new type of synthetic material that introduces a siloxanechain link containing trifluoropropyl in the main chain of silicone rubber, so that it has the high and low temperature resistance of silicone rubber and the solvent and oil resistance of fluororubber. In the process of synthesizing raw rubber, a small amount of vinyl siloxane chains are introduced at the same time as the vulcanization point of rubber. [0005] In the prior art, a basic fluorosilicone raw rubber is used to prepare fluorosilicone compounded ...
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