Silicone rubber foaming material and preparation method thereof
A technology of foaming materials and silicone rubber, applied in the field of materials, can solve problems such as the preparation of large-scale and precise-sized foamed silicone rubber materials that do not support three-dimensional structures, and the matching design research of heat treatment and shaping processes that have not been found, so as to achieve designability Strong, stable high and low temperature stiffness, and uniform cells
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
Embodiment 1
[0048] Take 500g of 110-2 vinyl silicone rubber and 100g of precipitated silica, knead in a kneader for 30 minutes, then heat-treat in an oven at 190°C for 2 hours, take it out and cool it to room temperature; Add 1.0 g of benzoyl peroxide, 5.0 g of dicumyl peroxide, 25 g of azodicarbonamide and 12.5 g of urea. After the addition is complete, pass through 10 times and park for 24 hours. Use a flat vulcanizer to mold, vulcanize and foam. The first-stage vulcanization and foaming conditions are: mold size ф80×30mm, feed material 160g, vulcanization temperature 124°C, and vulcanization time 30 minutes; the second-stage vulcanization and foaming conditions are: mold size ф120×50mm, The vulcanization temperature is 140°C, and the vulcanization time is 35 minutes; heat treatment in an oven at 90°C for 6 hours to shape the foam material.
[0049] The density of the foam material is 0.26g / cm 3 , when the compressive strain is 15%, 38%, 50%, the load is 150N, 485N, 875N, and the compr...
Embodiment 2
[0051] Take 500g of 110-2 vinyl silicone rubber and 300g of fumed silica, knead in a kneader for 45 minutes, then heat-treat in an oven at 198°C for 2 hours, take it out and cool it to room temperature; And add 2.5g of 2,4-dichlorobenzoyl peroxide, 1.5g of 2,5-dimethyl-2,5-di-tert-butylperoxyhexane, 21g of azodicarbonamide and 13g of urea, and add After the completion, thin pass 10 times, add 30g of 201 methyl silicone oil, after the addition, thin pass 10 times to remove the film, and park for 24 hours. Use a flat vulcanizer to mold, vulcanize, foam and form. The mold and the amount of material added are the same as in Example 1. The conditions for the first-stage vulcanization and foaming are temperature 127°C, time 15 minutes, and the conditions for second-stage vulcanization and foaming are temperature 160°C, time 60 minutes, and oven 95°C. ℃ heat treatment for 5.5 hours to set the shape to obtain a foam material.
[0052] The density of embodiment 2 foaming material is 0...
Embodiment 3
[0054] Take 500g of 110-1 vinyl silicone rubber and 225g of precipitated silica, knead in a kneader for 30 minutes, then heat-treat in an oven at 200°C for 2.5 hours, take it out and cool it to room temperature; And add 1.7g of benzoyl peroxide, 2g of di-tert-butyl peroxide, 10g of azodicarbonamide and 17g of urea. Repeat the next film and park for 24 hours. Use a flat vulcanizer to mold, vulcanize, foam and form. The mold and the amount of material added are the same as in Example 1. The conditions for the first-stage vulcanization and foaming are temperature 123°C, time 25 minutes, and the conditions for second-stage vulcanization and foaming are temperature 148°C, time 40 minutes, and oven 100 ℃ heat treatment for 5 hours to set the shape to obtain a foam material.
[0055] The density of the foam material is 0.25g / cm 3 , when the compressive strain is 15%, 38%, 50%, the load is 95N, 355N, 634N, and the compression set rate of 40%×48 hours at room temperature is 13%.
PUM
| Property | Measurement | Unit |
|---|---|---|
| density | aaaaa | aaaaa |
| density | aaaaa | aaaaa |
| density | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More