Multi-component room-temperature-curable silicone rubber composition

• US 8,101,677 B2
• Filed: 09/29/2006
• Issued: 01/24/2012
• Est. Priority Date: 09/30/2005
• Status: Active Grant

• Current Assignee: Dow Toray Co., Ltd. (Dow, Inc.)
• Original Assignee: Dow Corning Toray Company Limited (Dow, Inc.)
• Inventors: Nishiumi, Wataru, Morimoto, Hirotoki
• Primary Examiner(s): Lee, Katarzyna Wyrozebski
• Assistant Examiner(s): Sheh, Anthony H
• Application Number:
  US12/088,485
• Publication Number:
  US 20090281222A1
• Time in Patent Office: 1,943 Days
• Field of Search: 528/35, 524/98, 556/408
• US Class Current: 524/98
• CPC Class Codes: C08G 77/16 to hydroxyl groups
• CPC Class Codes: C08G 77/18 to alkoxy or aryloxy groups
• CPC Class Codes: C08G 77/20 containing silicon bound to unsaturated aliphatic groups C08G77/045 takes precedence
• CPC Class Codes: C08G 77/50 by carbon linkages C08G77/485 takes precedence
• CPC Class Codes: C08K 5/549 containing silicon in a ring
• CPC Class Codes: C08L 2666/44 Silicon-containing compounds
• 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 83/04 Polysiloxanes

Abstract

A multi-component room-temperature-curable silicone rubber composition comprising at least: (A) a diorganopolysiloxane, (B) a methoxy group-containing silicon compound comprising a bis(methoxysilyl)alkane or a organotrimethoxysilane (except amino group containing organotrimethoxysilane) (B-1), a methoxy group-containing carbasilatrane derivative (B-2), and an aminoalkylmethoxysilane (B-3) (wherein the weight ratio of constituent (B-2) to constituent (B-3) is in the range of (20:80) to (80:20)); and (C) a curing catalyst,

the composition being packaged as two or more separately stored compositions wherein none of said separately stored compositions contain all said components (A), (B), and (C) simultaneously.

Claims

1. A multi-component room-temperature-curable silicone rubber composition comprising at least:

(A) 100 parts by weight of a diorganopolysiloxane that has a viscosity in the range of 20 to 1,000,000 mPa·

s at 25°

C. and that comprises;

20 to 100 parts by weight of a diorganopolysiloxane (A-1) capped at both molecular terminals with alkoxysilyl groups or hydroxysilyl groups, and 0 to 80 parts by weight of a diorganopolysiloxane (A-2) capped at one molecular terminal with an alkoxysilyl group or a hydroxysilyl group and capped at the other molecular terminal with an alkyl group or an alkenyl group;

(B) a methoxy group-containing silicon compound comprising a bis(methoxysilyl)alkane or an organotrimethoxysilane (except amino group containing organotrimethoxysilane) (B-1), a methoxy group-containing carbasilatrane derivative (B-2), and a N-(β

-aminoalkyl) aminoalkylorganodimethoxysilane or N-(β

-aminoalkyl) aminoalkyltrimethoxysilane (B-3) (wherein constituent (B-1) is used in an amount of 0.5 to 15 parts by weight per 100 parts by weight of component (A), wherein the total amount of constituents (B-2) and (B-3) is in the range of 0.1 to 10 parts by weight per 100 parts by weight of component (A), and wherein the weight ratio of constituent (B-2) to constituent (B-3) is in the range of (20;

80) to (80;

20)); and

(C) 0.001 to 20 parts by weight of a curing catalyst,

the composition being packaged as two or more separately stored compositions wherein none of said separately stored compositions contain all said components (A), (B), and (C) simultaneously; and

wherein said methoxy group-containing carbasilatrane derivative (B-2) is of the following general formula;

2. The multi-component room-temperature-curable silicone rubber composition of claim 1, wherein said constituent (B-1) is a bis(methoxysilyl)alkane selected from the group consisting of 1,6-bis (trimethoxysilyl) hexane, 1,7-bis (trimethoxysilyl) heptane, 1,8-bis (trimethoxysilyl) octane, 1,9-bis (trimethoxysilyl) nonane, and 1,10-bis (trimethoxysilyl) decane.

3. The multi-component room-temperature-curable silicone rubber composition of claim 1, wherein said component (C) is an organic tin compound.

4. The multi-component room-temperature-curable silicone rubber composition of claim 1, wherein the weight ratio of constituent (A-1) to constituent (A-2) is in the range of (95:

5) to (70;

30).

5. The multi-component room-temperature-curable silicone rubber composition of claim 1, further comprising a fine powder of calcium carbonate (D) in the amount of 10 to 200 parts by weight per 100 parts by weight of component (A).

6. The multi-component room-temperature-curable silicone rubber composition of claim 5, being packaged as two separately stored compositions comprising a composition (I) composed of components (A) and (D) but does not contain components (B) and (C) and a composition (II) that contains components (B) and (C) but does not contain component (A).

7. The multi-component room-temperature-curable silicone rubber composition of claim 1, further defined as a construction sealant.

8. The multi-component room-temperature-curable silicone rubber composition of claim 1, further defined as an adhesive material for use in a multiple-pane insulating glass unit.

9. The multi-component room-temperature-curable silicone rubber composition of claim 8, that comprises a secondary sealing material for use in the multiple-pane insulating glass unit.

10. The multi-component room-temperature-curable silicone rubber composition of claim 2, wherein the weight ratio of constituent (A-1) to constituent (A-2) is in the range of (95:

5) to (70;

30).

11. The multi-component room-temperature-curable silicone rubber composition of claim 3, wherein the weight ratio of constituent (A-1) to constituent (A-2) is in the range of (95:

5) to (70;

30).

12. The multi-component room-temperature-curable silicone rubber composition of claim 2, further comprising a fine powder of calcium carbonate (D) in the amount of 10 to 200 parts by weight per 100 parts by weight of component (A).

13. The multi-component room-temperature-curable silicone rubber composition of claim 3, further comprising a fine powder of calcium carbonate (D) in the amount of 10 to 200 parts by weight per 100 parts by weight of component (A).

14. The multi-component room-temperature-curable silicone rubber composition of claim 4, further comprising a fine powder of calcium carbonate (D) in the amount of 10 to 200 parts by weight per 100 parts by weight of component (A).

15. The multi-component room-temperature-curable silicone rubber composition of claim 10, further comprising a fine powder of calcium carbonate (D) in the amount of 10 to 200 parts by weight per 100 parts by weight of component (A).

16. The multi-component room-temperature-curable silicone rubber composition of claim 3 further comprising a fine powder of calcium carbonate (D) in the amount of 10 to 200 parts by weight per 100 parts by weight of component (A).

17. The multi-component room-temperature-curable silicone rubber composition of claim 11, further comprising a fine powder of calcium carbonate (D) in the amount of 10 to 200 parts by weight per 100 parts by weight of component (A).

18. The multi-component room-temperature-curable silicone rubber composition of claim 1, wherein said component (C) is an organic salt of a metal selected from the group of tin, titanium, zirconium, iron, antimony, bismuth, and manganese.

19. The multi-component room-temperature-curable silicone rubber composition of claim 1, wherein said alkyl group of R⁵ is further defined as a methyl, ethyl, propyl, butyl, or octyl group.

20. The multi-component room-temperature-curable silicone rubber composition of claim 1, wherein said alkyl group of R⁷ is further defined as a methyl, ethyl, propyl, butyl, or octyl group.

21. The multi-component room-temperature-curable silicone rubber composition of claim 1, wherein said alkyleneoxyalkylene group of R⁸ is a methoxymethyl group, a methoxyethyl group, an ethoxyethyl group, or an ethoxyethoxy group.

22. The multi-component room-temperature-curable silicone rubber composition of claim 1, wherein said alkylene group and said substituted alkylene group of R⁸ have 5 to 7 carbon atoms.