Moisture-curable silylated polymer resin composition with reduced moisture sensitivity
AssigneeMomentive Performance Materials Inc.
InventorBrendan O'Keefe
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Abstract
There is provided herein a silylated polyurethane composition, a process of preparing a silylated polyurethane polymer, and an adhesive, sealant or coating containing a silylated polyurethane made therewith.
Claims26
A silylated polyurethane composition comprising a polymer of Formula (I):
- where P is a polymer;
- X is a urethane, urea or thiourea;
- R2 is a divalent alkylene group of up to 12 carbon atoms, optionally containing one or more heteroatoms, each R3 is the same or different alkyl or aryl group of up to 8 carbon atoms, each R4 is the same or different alkyl group of up to 6 carbon atoms, w is greater than or equal to 1, and a is 0, 1 or 2;
- and, an yttrium-containing catalyst.
A process for the preparation of silylated polyurethane polymer (i) from the reaction of polyol (ii) and/or hydroxyl-terminated polyurethane prepolymer (iii) with isocyanatosilane silylating agent (iv), or the reaction of polyisocyanate (v) and/or isocyanate-terminated polyurethane prepolymer (vi) with active hydrogen-containing silylating agent (vii), the process comprising:
- employing at least one yttrium-containing catalyst (viii) for the preparation of the hydroxyl-terminated polyurethane prepolymer (iii), isocyanate-terminated polyurethane prepolymer (vi) and/or silylated polyurethane polymer (i).
Dependencies are inferred from the claim text.