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US 2016/0107987 A1Published application
Method for preparing urethane (meth)acrylates
AssigneeBASF SE
InventorsReinhold Schwalm, Susanne Neumann, Delphine Kimpel
Life of this patent
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Abstract
Described is a process for preparing urethane (meth)acrylates. In a first step, a hydroxyalkyl (meth)acrylate is reacted with a lactone (B) in the presence of at least one zinc compound and/or bismuth compound (C) to produce a bismuth-containing product, and, in a further step, the bismuth-containing product is reacted with at least one cycloaliphatic or asymmetric aliphatic diisocyanate (D).
Claims17
A process for preparing urethane (meth)acrylates of the formula (I)
- comprising, in a first step, reacting a hydroxyalkyl(meth)acrylate (A) of formula (A)
- with a lactone (B) of formula (B)
- in the presence of at least one zinc compound and/or bismuth compound (C) to produce a bismuth-containing product,
- and, in a further step, reacting the bismuth-containing product with at least one cycloaliphatic or asymmetric aliphatic diisocyanate (D),
- wherein R1 is a divalent alkylene radical having 2 to 12 carbon atoms and which may optionally be substituted by C1 to C4 alkyl groups and/or interrupted by one or more oxygen atoms,
- R2 in each case independently of any other is methyl or hydrogen,
- R3 is a divalent alkylene radical having 1 to 12 carbon atoms and which may optionally be substituted by C1 to C4 alkyl groups and/or interrupted by one or more oxygen atoms,
- R4 is a divalent organic radical which is formed by abstraction of both isocyanate groups from a cycloaliphatic or asymmetric aliphatic diisocyanate, and
- n and m independently of one another are positive numbers from 1 to 5.
6 more elements
(canceled)
Dependencies are inferred from the claim text.