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US 8,524,840 B2Granted
Polyurethane sealant compositions having primerless to paint and glass properties
AssigneeDow Global Technologies LLC
InventorsHuide D. Zhu, Daniel P. Heberer
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Abstract
In one aspect, this invention is a composition comprising a urethane prepolymer having isocyanate moieties; a catalytic amount of a compound which catalyzes the reaction of isocyanate moieties with water or an active hydrogen containing compound; alpha hydrocarbyl silane compound; and a catalytic amount of a compound which catalyzes silanol condensation. The composition of the invention can be used to bond a window into a structure without the need to prime the window or the window flange of the structure.
Claims18
A composition comprising:
- (1) one or more urethane prepolymers having isocyanate moieties;
- (2) a catalytic amount of one or more compounds which catalyze the reaction of isocyanate moieties with water or an active hydrogen containing compound;
- and
- (3) one or more alpha hydrocarbyl silane compounds corresponding to the formula
- wherein:
- R1 is independently in each occurrence an aliphatic polyether;
- R2 is independently in each occurrence a hydrolyzable group;
- R3 is independently in each occurrence a monovalent hydrocarbon:
- R4 is independently in each occurrence C1-3 alkyl or hydrogen
- Z is independently in each occurrence a heteroatom containing functional linkage;
- n is independently in each occurrence an integer of 1 to 3:
- and
- m is about 1 or greater.
10 more elements
Dependencies are inferred from the claim text.