Fluorine-containing oil-resistant and anti-swelling silicone rubber foam material and preparation method thereof

A foam material and anti-swelling technology, which is applied in the field of silicone rubber foam materials, can solve the problems of increased steric resistance of silicone rubber chain segments, poor dispersion compatibility of foaming agents, and large cells, etc., to achieve a two-phase interface Increased compatibility, simple and efficient preparation process, fine and uniform cells

Active Publication Date: 2020-05-12
HANGZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the shortcomings of physical foaming technology, such as complex and time-consuming process, poor structure/performance stability, and difficulty in large-scale preparation, it cannot meet the needs of large-scale applications in aerospace, high-speed rail and other fields.
[0005] The room temperature chemical foaming silicone rubber foam method has the characteristics of fast foaming rate, high preparation efficiency, simple processing technology, and is suitable for off-site molding. To prepare room temperature chemical foaming fluorine rubber foam, the preparation of dimethyl silicon The traditional method of rubber foam will be difficult to achieve the preparation of fluorine-containing silicone rubber foam
Because fluorosilicone rubber introduces trifluoropropyl group into the molecular structure of dimethyl silicone rubber, the steric hindrance of the sid

Method used

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  • Fluorine-containing oil-resistant and anti-swelling silicone rubber foam material and preparation method thereof
  • Fluorine-containing oil-resistant and anti-swelling silicone rubber foam material and preparation method thereof
  • Fluorine-containing oil-resistant and anti-swelling silicone rubber foam material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Preparation of fluorine-containing oil-resistant and swelling-resistant silicone rubber foam (FSiRF):

[0039] Take 4.0 g of hydrogen-containing fluorosilicone oil with a viscosity of 55 mPa s and a hydrogen content of 0.3 wt%, and 16.0 g of perfluorosilicone oil with a viscosity of 20 Pa s and a vinyl content of 0.15 wt%, and add 0.1 g [(1,1- Dimethyl-2-propynyl)oxyl]trimethylsilane and 0.4g fluorosilicone surfactant AC-805 (Ark) mixed ethylene glycol (mass ratio 1:1), fully mixed evenly by mechanical stirring Then prepare component A; meanwhile, take 20.0 g of perfluorosilicone oil with a viscosity of 20 Pa s and a vinyl content of 0.15 wt %, add 0.47 g of chloroplatinic acid catalyst with a Pt mass concentration of 3000 ppm, and mix well by mechanical stirring Then prepare component B. Then, components A and B were mixed by mechanical stirring for 30s at a mass ratio of 1:1. After mixing evenly, let it react at room temperature for 5 minutes, and then put it in an o...

Embodiment 2

[0041] Preparation of fluorine-containing oil-resistant and anti-swelling silicone rubber foam material:

[0042] Take 5.0 g of hydrogen-containing fluorosilicone oil with a viscosity of 55 mPa·s and a hydrogen content of 0.3 wt%, and 15.0 g of a perfluorosilicone oil with a viscosity of 20 Pa·s and a vinyl content of 0.15 wt%, and add 0.1 g of 1-acetylene-1- (Trimethylsilyloxy)cyclohexane and 0.4g of glycerol (mass ratio 1:1) mixed with fluorosilicone surfactant BNK-4036 (Changhui Chemical Industry) were prepared by mechanical stirring and thorough mixing. Component A; at the same time, take 20.0g of perfluorosilicone oil with a viscosity of 20Pa·s and a vinyl content of 0.15wt%, add 0.47g of a chloroplatinic acid catalyst with a Pt mass concentration of 3000ppm, and prepare it after fully mixing it uniformly by mechanical stirring Component B. Then, components A and B were mixed by mechanical stirring for 30s at a mass ratio of 1:1. After mixing evenly, let it react at room...

Embodiment 3

[0044] Preparation of fluorine-containing oil-resistant and anti-swelling silicone rubber foam material:

[0045] Take 6.0 g of hydrogen-containing fluorosilicone oil with a viscosity of 75 mPa·s and a hydrogen content of 0.3 wt%, and 14.0 g of a perfluorosilicone oil with a viscosity of 20 Pa·s and a vinyl content of 0.35 wt%, and add 0.1 g [(1,1- Dimethyl-2-propynyl) oxygen group] triethylsilane and 0.4g glycerol (mass ratio 1:1) mixed with fluorosilicone surfactant BNK-4036 (Changhui Chemical Industry), by mechanical stirring Mix well and prepare component A; at the same time, take 20.0 g of perfluorosilicone oil with a viscosity of 20 Pa s and a vinyl content of 0.35 wt %, add 0.67 g of chloroplatinic acid catalyst with a Pt mass concentration of 3000 ppm, and stir it mechanically After mixing well and uniformly, component B is prepared. Then, components A and B were mixed by mechanical stirring for 30 seconds at a mass ratio of 1:1, and allowed to react at room temperatu...

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Abstract

The invention discloses a fluorine-containing oil-resistant and anti-swelling silicone rubber foam material and a preparation method thereof. The preparation method comprises the following steps: (1)uniformly mixing hydrogen-containing fluorosilicone oil, perfluorosilicone oil, a foaming agent and an inhibitor in a mass ratio of (1-2): (3-4): (0.01-0.5): (0.01-0.2) so as to obtain a component A,then additionally weighing the perfluorosilicone oil and a platinum catalyst, and carrying out uniform mixing so as to obtain a component B; and (2) mixing the component A and the component B according to a mass ratio of 1: 1, carrying out uniform stirring, then carrying out a reaction at a room temperature for 5-30 minutes, and carrying out crosslinking and curing on an obtained product at 50-125DEG C for 10-60 minutes; wherein in the component A, the foaming agent is a mixture of a fluorosilicone surfactant and a hydroxyl-containing reagent, and the inhibitor is a silicon alkyne compound and has a structural formula which is described in the specification; in the structural formula, R1, R2 and R3 are independently selected from the group consisting of H, a methyl group or an ethyl group, and R is selected from the group consisting of a cyclohexyl group or an isopropyl group; and in the component B, the mass ratio of the perfluorosilicone oil to Pt in the platinum catalyst is 100: (0.0001-0.01);

Description

technical field [0001] The invention relates to the technical field of silicone rubber foam materials, in particular to a fluorine-containing, oil-resistant and swelling-resistant silicone rubber foam material and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of my country's aerospace, rail transit, new energy vehicles and other fields, the demand for silicone rubber foam materials is becoming more and more refined, and the performance and technical requirements are getting higher and higher. In addition to the advantages of light weight and good resilience of traditional foam materials, silicone rubber foam also has the advantages of high and low temperature resistance, weather resistance, solvent resistance, electrical insulation, radiation resistance, and physiological inertia of silicone rubber. It can be widely used. It is used for the potting of electrical and electronic components and mechanical parts to preven...

Claims

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Application Information

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IPC IPC(8): C08L83/08C08K5/5419C08J9/00C08J9/14C08J9/12
CPCC08J9/0042C08J9/142C08J9/125C08J2383/08C08J2483/08C08J2203/10C08J2203/12
Inventor 张国栋吴志豪汤龙程夏乔琦彭家建厉嘉云赵丽
Owner HANGZHOU NORMAL UNIVERSITY
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