| US 7,592,400 B2 | ||
| Addition-crosslinkable silicone compositions comprising high-viscosity polydiorganosiloxanes | ||
| Christof Woerner, Burghausen (Germany) | ||
| Assigned to Wacker Chemie AG, Munich (Germany) | ||
| Filed on May 08, 2006, as Appl. No. 11/429,841. | ||
| Claims priority of application No. 10 2005 022 106 (DE), filed on May 12, 2005. | ||
| Prior Publication US 2006/0258819 A1, Nov. 16, 2006 | ||
| Int. Cl. C08L 83/04 (2006.01) | ||
| U.S. Cl. 525—477 [524/492; 524/493; 524/496; 524/588; 525/478; 525/479; 528/15; 528/31; 528/32] | 20 Claims |
| 1. An addition-crosslinkable silicone LSR composition comprising
(A) 100 parts by weight of vinyl-terminated polydiorganosiloxane having a viscosity of from 5000 to 700,000 mPas and having
not more than 0.1 mol % of lateral vinyl groups,
(B) from 0.1 to 50 parts by weight of polydiorganosiloxane having a viscosity of from 200 to 1,000,000 mPas and having from
0.5 to 30 mol % of lateral vinyl groups,
(C) from 1 to 150 parts by weight of polydiorganosiloxane having a viscosity of at least 2,000,000 mPas and having from no
to a maximum of three lateral vinyl groups per polymer chain,
(D) SiH-functional crosslinker,
(E) hydrosilylation catalyst, and
(F) 0-90 parts by weight of a filler having a specific surface area of at least 50 m2/g.
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