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US 11,459,421 B2Granted
Water-swellable moisture curing one-component polyurethane sealant
AssigneeSika Technology AG
InventorMichael Schlumpf
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Abstract
A one-component moisture curing composition and a method for sealing construction joints against penetration of water. The one-component moisture curing composition includes at least one isocyanate-functional polyurethane polymer, at least one inorganic swelling agent selected from the group including aluminum sulfate and magnesium sulfate, and at least one hydrophilic aldimine of formula (I).
Claims14
A one-component moisture curing composition comprising:
- a) at least one isocyanate-functional polyurethane polymer,
- b) at least one inorganic swelling agent selected from the group consisting of aluminum sulfate and magnesium sulfate, and
- c) at least one hydrophilic aldimine of the formula (I);
- wherein
- m is 2 or 3
- A is a divalent or trivalent hydrocarbyl moiety having a content of ethylene oxide units of 50.0-95.0% by weight, based on the weight of A, and having average molecular weight in the range from 600 to 4,000 g/mol, and
- Z is a monovalent C3 to C30 hydrocarbyl moiety optionally containing ether, carbonyl, ester, amido, urethane, urea or tertiary amino groups.
4 more elements
Dependencies are inferred from the claim text.