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US 2017/0320997 A1Published application
Polymer containing silane groups
AssigneeSika Technology AG
InventorsAndreas KRAMER, Urs BURCKHARDT
Life of this patent
Estimating the term…
Abstract
A polymer containing silane groups, a method for synthesizing same, and curable compositions including the polymer. The polymer containing silane groups has a very long shelf life and cures quickly with moisture. The polymer is suitable as an elastic adhesive or sealant or coating that can be applied at room temperature and has good heat resistance, or as a hot melt adhesive.
Claims15
A polymer having end groups of the formula (I)
- where
- either R′ is a radical of the formula (II) and R″ is a hydrogen radical or R′ is a hydrogen radical and R″ is a radical of the formula (II);
- R1 is a hydrocarbyl radical which has 1 to 18 carbon atoms and optionally has heteroatoms in the form of ether oxygen, ester oxygen, thioether sulfur or tertiary amine nitrogen;
- R2 is a linear or branched alkylene or cycloalkylene radical having 1 to 20 carbon atoms, optionally having aromatic components, and optionally having one or more heteroatoms;
- R3 is an alkyl radical having 1 to 8 carbon atoms;
- R4 is an aliphatic or cycloaliphatic or arylaliphatic hydrocarbyl radical which has 1 to 12 carbon atoms and optionally has one or two ether oxygens;
- X is O or S;
- and
- n is 0 or 1 or 2.
6 more elements
A hydroxysilane of the formula (VII)
- where
- either R5 is a radical of the formula (VIII) and R6 is a hydrogen radical or R5 is a hydrogen radical and R6 is a radical of the formula (VIII);
- —(CH2)2—Si—(OR8)3 (VIII)
- and R7 and R8 are either each a methyl radical or each an ethyl radical.
1 more element
Dependencies are inferred from the claim text.