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US 2010/0305229 A1Published application
Silicon-containing foams
AssigneeWacker Chemie AG
InventorsWolfgang Ziche, Volker Stanjek, Richard Weidner
Life of this patent
Estimating the term…
Abstract
Silicone foams having good foam structure and rapid cure are produced from foamable mixtures containing a physical blowing agent and an organically modified organopolysiloxane containing at least one urea or urethane group and an alkoxy(alkyl)siloxy unit.
Claims10
1-9. (canceled)
A foamable mixture (M) comprising:
- A) at least one organically modified organopolysiloxane (S) which on average has at least one urethane or urea unit and also a group of the formula [1]
- —SiR1z(OR2)3-z [1]
- where
- R1 is an alkyl, cycloalkyl, alkenyl or aryl radical having 1-20 carbon atoms,
- R2 is hydrogen, an alkyl radical which has 1-10 carbon atoms and in which up to 4 nonadjacent CH2— groups are optionally replaced by an —O— group, or an acyl radical having 1-10 carbon atoms and
- z is 0, 1 or 2, per molecule and
- B) a blowing agent (T).
4 more elements
Dependencies are inferred from the claim text.