Claims
- 1. Foamed organosilicon compositions, prepared by mixing of organosiloxane rubber, organosilicon joining agent and modifier, wherein said organosiiloxane rubber is represented by polyorganosiloxane block co-polymers having general formula as follows:{[R1SiO1,5]a[R2(OH)SiO]b, [R3R4SiO]c}n, having respective OH groups content from 0.2% to 4.0 mass % and mol. % ratio of R3R4SiO units to R1SiO1,5 falling within the range 0.850-10,000, correspondingly, where: R1, R2, R3, R4 are aliphatic radicals having from 1 to 6 carbon atoms; phenyl, n is an integer from 30 to 360; c=1; a=0.019-3.760; b=0.008-0.240 or mixture of the above block-copolymer with the α, ω-dihydroxypolydiorganosiloxane of viscosity at 20° C. from 24 P up to 160 P in the ratio of mass parts as (0.05-0.5):1, respectively; while the polyorganohydridesiloxanes act as an organosilicon joining agent, having general formula as follows:R35SiO[R6(H)SiO]m—[R25SiO]nSiR35, having the contents of SiH groups falling within the range of (0.35-1.80) mass %; molecular mass limited by 50-200, where: R5, R6 is the alkyl radical having from 1 to 6 carbon atoms; m is an integer from 1 to 20, n is an integer from 0 to 19; m÷n=20, or at least one substance from the compositions having general formula as follows:R7SiX3, where: R7=alkyl radical having from 1 to 6 carbon atoms,CH2═CH—, X:—ON═C(CH3)2, —OC(O)—CH3, and organosilicon amines are used as a modifier, having general formula as follows:R8R9N—(CH2)n—Si(OR10)3, where R8═R9═H—, CH3—, C2H5—, R10═—CH3—, C2H5—, n is an integer from 0 to 3 or mixture of sodium bicarbonate with zinc oxide, or non-organic compound of cobalt with 34 mass % cobalt content, with the proviso of mass fraction ratio of mixed components as follows:organosiloxane rubber:100organosilicon joining agent:2-15modifier:2-22.
- 2. The foamed organosilicon compositions according to claim 1 wherein the composition is additionally injected with tin diethyidicaprylate in amount from 0.3 to 1.5 mass parts.
- 3. The foamed organosilicon compositions according to claim 1 wherein the composition is additionally injected with filler in amount from 5 to 150 mass parts.
- 4. The foamed organosilicon compositions according to claim 1 wherein at least one of the substances acting as a filler is chosen from the group consisting of chalk, silica filler, and titanium dioxide.
- 5. The foamed organosilicon compositions according to claim 1 wherein glass microspheres are included as a filler.
Priority Claims (1)
Number |
Date |
Country |
Kind |
96109535 |
May 1996 |
RU |
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Parent Case Info
This application is a division of application Ser. No. 08/737,390 filed Nov. 8, 1996, now U.S. Pat. No. 5,886,060. This application is a con of PCT/RU96/00193 filed Jul. 6, 1996.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
5886060 |
Minasyan et al. |
Mar 1999 |
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Continuations (1)
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Number |
Date |
Country |
Parent |
PCT/RU96/00193 |
Jul 1996 |
US |
Child |
08/737390 |
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US |