Hydroxysilane and polymer containing silane groups
AssigneeSika Technology AG
InventorsAndreas KRAMER, Urs BURCKHARDT, Ursula STADELMANN
Life of this patent
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Abstract
Special hydroxysilanes, which can be obtained by reacting β-(3,4-epoxycyclohexyl)alkyltrialkoxysilanes with secondary amines, and adducts of the hydroxysilanes in the form of polymers containing silane groups. The hydroxysilanes can be produced having high purity in a simple process and are very stable in storage after production. The polymers containing silane groups that can be obtained by means of the hydroxysilanes have advantageous properties. The polymers enable moisture-curing compositions, which contain no isocyanate groups and which are suitable as elastic adhesives and sealants.
Claims13
A hydroxysilane of the formula (I)
- where
- either R′ is a radical of the formula (II) and R″ is hydrogen or R′ is hydrogen and R″ is a radical of the formula (II);
- R1 and R2 are either each individually an alkyl radical having 1 to 12 carbon atoms and optionally having heteroatoms in the form of ether oxygen, thioether sulfur or tertiary amine nitrogen,
- or together are an alkylene radical having 2 to 12 carbon atoms and optionally having heteroatoms in the form of ether oxygen, thioether sulfur or tertiary amine nitrogen;
- R3 is a linear or branched alkylene or cycloalkylene radical having 1 to 20 carbon atoms, optionally having aromatic moieties, and optionally having one or more heteroatoms;
- R4 is an alkyl group having 1 to 8 carbon atoms;
- R5 is an alkyl group having 1 to 10 carbon atoms and optionally having one or more ether oxygen heteroatoms;
- and
- x is 0 or 1 or 2.
-15. (canceled)
Dependencies are inferred from the claim text.