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US 9,850,260 B2Granted
Hydroxymethyl-carboxamido-substituted silane and its use for curable, silane-terminated polymers
AssigneeSika Technology AG
InventorsAndreas Kramer, Urs Burckhardt, Ursula Stadelmann
Life of this patent
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Abstract
Specific hydroxysilanes of formula (I), a method for the production thereof, the use thereof as a constituent of moisture-curing compositions, and silane-functional compounds produced therefrom, in particular silane-functional polymers and isocyanatosilanes. The hydrosilanes can be produced in a simple process with a high degree of purity and are storage-stable after production. Production from the reaction of lactides with aminosilanes is particularly advantageous. Hydroxysilane of formula (I), where n is 1 or 2.
Claims15
A process for producing a hydroxysilane of the formula (I),
- where
- R1a and R1b, independently of one another, are in each case a hydrogen atom or a monovalent hydrocarbon radical having 1 to 12 carbon atoms, or together are an alkylene radical having 2 to 6 carbon atoms;
- R2 is a hydrogen atom or a monovalent hydrocarbon radical having 1 to 12 carbon atoms which optionally comprises ether groups, ester groups, nitrile groups, amino groups or silane groups;
- R3 is a linear or branched alkylene or cycloalkylene radical having 1 to 20 carbon atoms, optionally with aromatic fractions, and optionally with one or more heteroatoms;
- R4 is an alkyl radical having 1 to 8 carbon atoms;
- R5 is an alkyl radical having 1 to 10 carbon atoms which optionally comprises ether groups;
- n is 1 or 2;
- and
- x is 0, 1 or 2, the process comprising:
- reacting at least one lactide of the formula (II) or at least one hydroxy ester of the formula (III) with at least one aminosilane of the formula (IV),
- where
- m is an integer from 1 to 100;
- and
- R6 is a monovalent hydrocarbon radical having 1 to 12 carbon atoms.
11 more elements
Dependencies are inferred from the claim text.