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US 2006/0148921 A1Published application
Expansible mixtures devoid of isocyanates exhibiting improved fire behaviour
AssigneeWacker Chemie AG
InventorsVolker Stanjek, Felicitas Schauer, Richard Weidner
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Abstract
Foamable compositions which are free of isocyanates, which exhibit low shrinkage, low propensity toward crack formation, and which display good flammability resistance, are prepared from blowing agent-containing compositions of alkoxysilane-terminated prepolymers derived from a polyol component which contains one or more halogenated polyols.
Claims18
-9. (canceled)
An isocyanate-free foamable composition, comprising:
- isocyanate-free, alkoxysilane-terminated prepolymers having silane end groups of the formula [2]
- —SiR3z(OR4)3-z [2]
- where
- R3 is an alkyl, cycloalkyl, alkenyl or aryl radical, having 1-10 carbon atoms,
- R4 is an alkyl radical having 1-2 carbon atoms or an ω-oxaalkylalkyl radical having a total of 2-10 carbon atoms and
- z is O or 1,
- wherein said prepolymers incorporate a polyol component comprising at least one halogen-containing polyol,
- (B) at least one blowing agent.
5 more elements
Dependencies are inferred from the claim text.