Organosilicon compounds
AssigneeGivaudan-Roure Corporation
InventorsGeorg Frater, Rolf Schwarzenbach, Stephane F. M. Van Oycke
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Abstract
Novel organosiloxane compounds have at least one unit ##STR1## any other units being present in this organosiloxane are ##STR2## wherein R is a C.sub.1-8 alkyl or aryl, R.sup.1 is H or a C.sub.1-5 alkyl, R.sup.2 is H, C.sub.1-5 alkyl or OR.sup.1, R.sup.3 is a C.sub.1-5 alkyl, R" is H, a monovalent C.sub.1-8 hydrocarbon or halogenated hydrocarbon group, a is 0, 1 or 2, b 0, 1, 2 or 3 and n 1 to 6, provided the --C(R.sup.1).dbd.CH--(CR.sub.2.sup.1).sub.n --O-- group and the two R.sup.2 groups are linked to the aromatic ring at the para- and meta-positions in relation to the group --CH.dbd.C[C(O)OR.sup.3 ].sub.2. The compounds are useful as UV sunscreens. Compositions containing them are also included.
Claims1
A compound of the formula
- C(R.sup.1).tbd.C--(CR.sup.1.sub.2).sub.n --O--C.sub.6 R.sup.2.sub.2 H.sub.2 --CH.dbd.C--[C(O)OR.sup.2].sub.2
- wherein R.sup.1 is a hydrogen atom or a C.sub.1-5 alkyl group, the group C.sub.6 R.sup.2.sub.2 H.sub.2 represents an aromatic ring, wherein R.sup.2 is a hydrogen atom, a C.sub.1-5 alkyl group or a group OR.sup.1, R.sup.3 is a C 1-5 alkyl group and n has a value of from 1 to 6, provided that the group containing the unsaturated carbon-carbon triple bond and the two R.sup.2 groups are linked to the two meta-positions and to the para-position on the aromatic ring in relation to the ester containing group.
Dependencies are inferred from the claim text.