Multi-component room-temperature-curable silicone rubber composition
View Patent ↗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.
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:
wherein R 5 is an alkyl group having 1 to 10 carbon atoms or a methoxy group; each R 7 is independently selected from a hydrogen atom or an alkyl group having 1 to 10 carbon atoms; and each R 6 is independently selected from the groups represented by the following formulae:
wherein R 8 is an alkylene or substituted alkylene group having 2 to 10 carbon atoms, or an alkyleneoxyalkylene group; and OMe is a methoxy group; R 2 is a univalent hydrocarbon group, a halogenated hydrocarbon group, or a cyanoalkyl group; R 4 is an alkylene or substituted alkylene group having 2 to 10 carbon atoms; and “c” is 0, 1, or 2.
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 R 5 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 R 7 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 R 8 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 R 8 have 5 to 7 carbon atoms.