Curable silicone composition

• US 5,405,888 A
• Filed: 12/28/1993
• Issued: 04/11/1995
• Est. Priority Date: 12/28/1993
• Status: Expired due to Fees

• Current Assignee: ThreeBond Co., Ltd.
• Original Assignee: ThreeBond Co., Ltd.
• Inventors: Takeoka, Toru
• Primary Examiner(s): Bleutge, John C.
• Assistant Examiner(s): Sweet, Mark D.
• Application Number:
  US08/174,127
• Time in Patent Office: 469 Days
• Field of Search: 524/266, 524/268, 524/369, 524/378, 524/588, 528/26, 528/28, 528/38, 528/32, 522/34
• US Class Current: 522/34
• CPC Class Codes: C08K 5/0025 Crosslinking or vulcanising agents; including accelerators
• CPC Class Codes: C08L 2666/28 Non-macromolecular organic substances
• CPC Class Codes: C08L 83/00 Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
• CPC Class Codes: C08L 83/08 containing silicon bound to organic groups containing atoms other than carbon, hydrogen and oxygen

Abstract

A photocurable and moisture-curable silione composition comprising a reactive organosilane which has acryldialkoxysilyl or acryldiallyloxysilyl groups at both ends, a silicone oil, a photosensitizer and a moisture-curing catalyst.

Claims

1. A silicone composition capable of being cured by both moisture-curing and UV-curing mechanisms comprising:

(a) 30-100 parts by weight of a reactive organosiloxane containing 0.1-5 wt % of a moisture-curing catalyst for silicone, said reactive organosiloxane being an addition reaction product of a silicone and an acrylic acid derivative, said silicone having a kinematic viscosity or 50 to 50,000 centistokes, measured at 25°

C., said silicone having the structural formula ##STR6## where R₁ and R₅, which are the same of different, are each an organic group, and n is an integer of at least 2, said acrylic acid derivative having the formula ##STR7## where R₆ is hydrogen or an alkyl group having 1 to 5 carbon atoms and R₇ is an alkylene group;

(b) 0-70 parts by weight of a silicone oil per 100 parts by weight of the silicone composition, said silicone oil having a trimethylsilyl group as an end group; and

(c) an effective amount of a photosensitizer.

2. The silicone composition as set forth in claim 1 wherein said reactive organosilane is obtained by condensing-reacting at least two mole of said acrylic acid derivative to 1 mole of said silicone.

3. The silicone composition as set forth in claim 1 wherein said silicone oil of component (b) is a polymethylsiloxane having a kinematic viscosity of 50 to 5,000 centistokes measured at 25l°

C.