DERIVATIVE OF KINAMIC ACID OF SILICONIC TYPE, METHOD OF PREPARATION OF THE SAME, ABSORBENT OF UV RAYS AND AN EXTERNAL AGENT FOR THE TREATMENT OF THE SKIN.

摘要

A SILICONE-TYPE CINAMIC ACID DERIVATIVE, WHICH IS A SILOXANE THAT HAS AT LEAST ONE UNIT REPRESENTED BY FORMULA (I), AND THAT HAS THE OTHER UNITS THAT MAY EXIST IN THE SILOXANE OF FORMULA O (4-M) -2SIR3M, WHERE R1 IS AN ALKYL GROUP THAT HAS 1-4 CARBON ATOMS, A PHENYLUS GROUP, OR A TRIMETILSILOXI GROUP; R2 IS A DIVALENT HYDROCARBON GROUP, WHICH HAS AT LEAST 2 CARBON ATOMS, WHICH MAY CONTAIN A HETERO-ATOM OR; X IS AN ALCOXI GROUP; N VALE 0-3; A VALE 2-3; R3 IS AN ALKYL GROUP THAT HAS 1-4 CARBON ATOMS, A PHENYLUS GROUP OR A TRIMETILSILOXI GROUP; AND M IS AN INTEGER OF 0-3.