(Meth)-acrylic acid derivatives of triisocyanates in dentistry
AssigneeBayer Aktiengesellschaft
InventorsJurgen Reiners, Wolfgang Podszun, Carlhans Suling, Jens Winkel
Life of this patent
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Abstract
The new (meth)-acrylic acid derivatives of triisocyanates can be prepared by reacting appropriate triisocyanates with hydroxyalkyl (meth)-acrylates. The compounds can be employed as monomers for use in the dental field.
Claims8
A polymer containing units on the basis of (meth)-acrylic acid derivative of a triisocyanate of the formula ##STR8## in which R.sup.1 and R.sup.2 are identical or different and respresent hydrogen or a lower alkyl radical,
- R.sup.3, R.sup.4 and R.sup.5 are identical or different and denote hydrogen or methyl,
- Y.sup.1 to Y.sup.3 are identical or different and denote divalent straight-chain or branched hydrocarbon radicals, having 2 to 15 carbon atoms, which may contain 1 to 3 oxygen bridges and can be substituted by 1 to 4 additional (meth)-acryloyl-oxy radicals, and
- the rings A and B are identical or different and can be aromatic or saturated.
In the filling of a tooth wherein the tooth is filled with a composition comprising a polymerizable monomer and a polymerization catalyst and the composition is permitted to polymerize, the improvement wherein said monomer is a (meth)-acrylic acid derivative of a triisocyanate of the formula ##STR9## in which R.sup.1 and R.sup.2 are identical or different and represent hydrogen or a lower alkyl radical,
- R.sup.3, R.sup.4 and R.sup.5 are identical or different and denote hydrogen or methyl,
- Y.sup.1 to Y.sup.3 are identical or different and denote divalent straight-chain or branched hydrocarbon radicals, having 2 to 15 carbon atoms, which may contain 1 to 3 oxygen bridges and can be substituted by 1 to 4 additional (meth)-acryloyl-oxy radicals, and
- the rings A and B are identical or different and can be aromatic or saturated.
Dependencies are inferred from the claim text.