Small pore diameter silicone rubber sponge and preparation method thereof

[0030] Step A1, preparation of liquid silicone rubber composition: in 100 parts of liquid silicone rubber (glue viscosity 500CS), the liquid silicone rubber here is liquid organosiloxane, preferably in 100 parts of vinyl silicone In alkane (sizing material viscosity 500CS), add 4 parts of hydrogen-containing silicone oil (hydrogen value 1.6g), 1 part of addition reaction inhibitor vinyl ring body (vinyl content is greater than 29%), 2 parts of organoplatinum catalyst (platinum The concentration is 1000PPM), stirring and mixing at 600r / min for 5 minutes to obtain a liquid silicone rubber composition.

[0031] Step A2, preparation of water-in-oil silicone rubber latex: take 50 parts of liquid silicone rubber composition from the above liquid silicone rubber composition, add 4 parts of Gransurf 77 emulsifier (HLB value 4.5, Grant Industries Inc), 50 parts of deionized Water, mixed at 6000r / min for 5 minutes to obtain water-in-oil silicone rubber latex.

[0032] Compared with the...

[0035] The difference from Example 1 is that when preparing the liquid silicone rubber composition in step A1, the amount of hydrogen-containing silicone oil is 6 parts, and the rest of the process conditions and operating steps are the same as in Example 1. The performance of the obtained silicone rubber sponge is shown in Table 1.

[0037] The difference from Example 1 is that when preparing the water-in-oil silicone rubber latex in step A2, 40 parts of the liquid silicone rubber composition was taken, and 60 parts of deionized water were added, and the rest of the process conditions and operating steps were the same as in Example 1. The performance of the obtained silicone rubber sponge is shown in Table 1.