Fluorine silicon mixed making rubber and preparation method thereof

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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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The present invention aims at the defects existing in the fluorosilicone compound rubber obtained by mixing a single raw rubber in the prio

Method used

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  • Fluorine silicon mixed making rubber and preparation method thereof
  • Fluorine silicon mixed making rubber and preparation method thereof
  • Fluorine silicon mixed making rubber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0049] Example 1

[0050] Put 100 parts by weight of fluorosilicone raw rubber into the open mill, adjust the roller pitch to a small amount of rubber between the two rollers, add 4 parts by weight of methyl vinyl silicone rubber in turn, 45 parts by weight, the specific surface area is 200m 2 / g of fumed white carbon black treated with hexamethyldisilazane, 8 parts by weight of hydroxyfluorosilicone oil, 5 parts by weight of heat stabilizer iron oxide red, mixed for 20-30 minutes, and then adjust the roller pitch to 0.4 After 10 passes of ~0.6mm thin, add 1 part by weight of 2.5-dimethyl-2.5 bis(tert-butylperoxy)hexane. The temperature of the roll is controlled at 50±5℃, the mixing time is 20-30min, and the thickness is adjusted to produce the sheet. Perform one-stage vulcanization at 170℃×10min in the flat vulcanizing agent, and the second-stage vulcanization at 200℃×4h.

Example Embodiment

[0051] Example 2

[0052] ① Take 2000g of raw rubber A and raw rubber B in a ratio of 4:6, 40g methyl vinyl silicone rubber, and appropriate amount of release agent;

[0053] ②White carbon black 900g, "structured" control agent hydroxy fluorosilicone oil 60g, dimethoxy polytrifluoropropyl methylsiloxane 30g, "concentrated crosslinking agent" vinyl fluorosilicone oil (1) 60g, once or Add to the kneader in batches, knead uniformly into a dough at a temperature of 60°C;

[0054] ③Heat up to 130℃, knead heat treatment for 1 hour under vacuum -0.08~-0.09Mpa, release glue below 100℃, store for 24 hours; do not stick glue during kneading heat treatment;

[0055] ④After refining and thinning for 7 times, 150 mesh squeeze and filter;

[0056] There is no "structured" phenomenon after storage for 12 months;

[0057] ⑤ Add 1 part by weight of vulcanizing agent [2.5-dimethyl-2.5 bis(tert-butylperoxy) hexane] and iron oxide red to the prepared rubber compound, and vulcanize it on a flat vulcanizing ...

Example Embodiment

[0058] Example 3

[0059] Repeat the steps described in Example 2 and change the raw rubber to raw rubber A and raw rubber B in a ratio of 2:8 to total 2000 g. The dough was kneaded at a temperature of 30°C, heated to 140°C, vacuum-kneaded and heat-treated for 0.5 hours. The parking time of the rubber compound was 36 hours.

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Abstract

The invention discloses fluorine silicon mixed making rubber and a preparation method thereof. Fluorine silicon basic rubber for preparing the mixed making rubber consists of fluorine silicon 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 siloxane chain 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 ...

Claims

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Application Information

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IPC IPC(8): C08L83/07C08L83/08C08K13/06C08K9/06C08K3/36C08K7/06
Inventor 应永安方海滔陈伟杨新华吴志筐王志强谢福钦祝森慧
Owner ZHEJIANG HUANXIN FLUORO MATERIAL
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