Curable silicone compositions containing reactive non-siloxane-containing resins
View Patent ↗The present invention relates to two-part moisture curing compositions useful for adhesive, sealing, potting and other applications. In particular, the present invention relates to two-part room temperature vulcanizing (RTV) compositions which include in one of the parts a moisture curing organic polymer which is substantially free or does not contain siloxane bonds in its backbone.
1. A two-part moisture-curable composition comprising:
(a) a first part comprising at least one hydroxyl-terminated polydiorganosiloxane and a water source;
(b) a second part comprising at least one moisture cure catalyst, and at least one moisture curing silyl-functionalized material having the formula:
where R 1 is C 1-4 alkyl, aryl, acyl, alkoxyalkyl; a is an integer 0-2; A is a polymer backbone comprising acrylate moieties; A is not interrupted by nitrogen atoms, and no nitrogen atoms are present between the terminal silicon atoms and A; and R 2 is C 1-20 hydrocarbon radical.
2. The composition of claim 1 , wherein the acrylate moieties are functionalized.
3. The composition of claim 1 , wherein the water source comprises a wet-filler material.
4. The composition of claim 1 , wherein the second part further comprises a moisture curable organosilane.
5. The composition of claim 1 , wherein the second part further comprises a moisture scavenger component.
6. The composition of claim 1 , wherein the moisture curing silyl-functionalized material is present in amounts of about 50% to about 80% by weight of the total composition.
7. The composition of claim 1 , wherein the hydroxyl terminated polydiorganosiloxane is present in amounts of about 50% to about 80% by weight of the total composition.
8. A cured reaction product formed from the two-part moisture-curable composition of claim 1 .
9. The composition of claim 1 , wherein the second part further comprises at least one alkoxysilane crosslinker.
10. The composition of claim 1 , wherein the second part further comprises a moisture curing silyl-terminated component comprising a polyurethane backbone, a polyether backbone, a polyethylene backbone, a polypropylene backbone, a polypropylene oxide backbone, an epoxy backbone or a combination of these components.
11. The composition of claim 1 , wherein the second part further comprises a moisture curing silyl-terminated component comprising a polyurethane backbone, a polyether backbone, or a combination of these components.
12. The composition of claim 1 , wherein the second part further comprises a moisture curing silyl-terminated component comprising a backbone including organic segments interrupted by one or more atoms independently selected from N and O.
13. The composition of claim 1 , wherein the polymer backbone comprises a copolymer of different acrylate moieties.
14. The composition of claim 1 wherein the polymer backbone of A includes O atoms.
15. The composition of claim 1 , wherein the silyl functional groups are terminal.
16. The composition of claim 15 further including a hydrocarbon diradical situated between the silyl end-capped group and the polymer backbone.
17. The composition of claim 16 , wherein the hydrocarbon diradical comprises aliphatic groups, aromatic groups, or alicyclic groups.
18. A two-part moisture-curing composition comprising:
a first part comprising
at least one hydroxyl-terminated polydiorganosiloxane and water;
a second part comprising
at least one moisture curing silyl-functionalized material comprising acrylate moieties, one or more silyl terminal groups, and a hydrocarbon diradical disposed between the silyl terminal group and the acrylate moiety,
at least one alkoxy crosslinker, and
at least one moisture cure catalyst.
19. The composition of claim 18 wherein the hydrocarbon diradical is selected from the group consisting of aliphatic groups, aromatic groups, and alicyclic groups.
20. The composition of claim 18 wherein the acrylate moieties comprise a copolymer of different acrylate monomers.
21. The composition of claim 18 wherein the second part further comprises a moisture curing silyl-terminated component comprising a polyurethane backbone, a polyether backbone, a polyethylene backbone, a polypropylene backbone, a polypropylene oxide backbone, an epoxy backbone or a combination of these components.
22. The composition of claim 18 wherein the silyl-functionalized material comprises a backbone including O atoms.