Hybrid end-capped reactive silicone polymers
AssigneeHenkel Corporation
InventorsMichael P. Levandoski, Robert P. Cross, Alfred A. DeCato, Heath L. Salvati
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Abstract
The present invention provides novel “hybrid” silyl-terminated polymers that contain at least two different reactive end-capping groups. The “hybrid” silyl-terminated polymers of the present invention are produced by a novel single multi-step end-capping reaction of at least one silanol-terminated polymer with at least two silanes in the presence of a catalyst.
Claims35
A method for preparing a silyl-terminated polymer terminated with different reactive end-capping groups comprising:
- a.) providing at least one silanol-terminated polymer and at least two end-capping silane components having different end-capping groups;
- and
- b.) reacting said at least two end-capping silane components with said at least one silanol-terminated polymer, said silane components being present in amounts sufficient to form said alkoxy silyl-terminated polymer terminated with different reactive end-capped groups.
An end-capped silyl polymer having different reactive end-capped groups comprising:
- a. providing at least one silanol-terminated polymer and at least two end-capping silane
- components having different reactive end-capping groups;
- b. reacting said at least two end-capped silane components with said silanol-terminated polymer, said silane components being present in an amount sufficient to produce at least a predominant amount relative to other reaction products of an end-capped silyl-terminated polymer having different reactive end-capping groups;
- and
- c. end-capping remaining non-reacted silanol-terminated polymer backbone by adding excess of said first silane component.
An alkoxy silyl-terminated polymer having different reactive end-capped groups corresponding to the structure:
- 10
- wherein A represents a polymer or copolymer backbone selected from the group consisting of polyurethane, silicone, polyamide, polyether, polyester and combinations thereof;
- R3 and R5 are different functional groups having up to 10 carbon atoms and are selected from (meth)acryl, amino, vinyl, alkoxy, aryloxy, acetoxy, oxime and combinations thereof, and either R3 or R5 may also be a monovalent heterohydrocarbon radical having up to 10 carbon atoms (C1-10), wherein the hetero atoms are selected from O, N and S;
- R4 is alkyl (C1-10) or —CH2CH2OCH3.
A polymerizable polymer composition comprising the reaction product of:
- a.) an alkoxy silyl-terminated polymer corresponding to the structure:
- 11
- wherein A represents a polymer or copolymer backbone selected from the group consisting of polyurethane, silicone, polyamide, polyether, polyester and combinations thereof R3 and R5 are different functional groups having up to 10 carbon atoms and are selected from (meth)acryl, amino, vinyl, alkoxy, aryloxy, acetoxy, oxime and combinations thereof, R3 or R5 may be a monovalent heterhydrocarbon radical having up to 10 carbon atoms (C1-10), wherein the hetero atoms are selected from O, N and S, and R4 is alkyl (C1-10) or —CH2CH2OCH3;
- and
- b.) a curingly effective amount of curing catalyst.
A method of providing a polymeric coating on a part comprising:
- (1) applying to said part a reactive silicone composition comprising a predominant amount by weight of any single component an alkoxy silyl-terminated polyorginosiloxane having different reactive end-capped groups, and
- (2) exposing said composition to one or more cure conditions selected from moisture, actinic radiation and heat for a sufficient time to at least partially cure said polymeric coating.
Dependencies are inferred from the claim text.