3v Inc.

3v Sigma S.p.a.

Sigma Prodotti Chimici S.p.a.

Giuseppe Raspanti

Alverio Malpede

Giorgio Zanchi

Marco Brena

Ferruccio Berte'

Matteo Zanotti Russo

Massimo Barzaghi

Build-up suppressing compositions and the use thereof in polymerization processes

Benzoxazole derivatives for use in cosmetic compositions and for stabilizing synthetic polymers

The invention relates to build-up agents which comprise a condensation product among an aldehyde, a phenol compound and an aromatic carboxylic acid, hydroxy-substituted on the aromatic nucleus. The products are particularly effective in reducing or suppressing the build-up formation in the polymerization of vinyl chloride or vinyl acetate, other copolymerizable substances being optionally present. Further objects of the invention are compositions containing the above agents, their use as build-up agents, methods for their preparation and the products obtained therefrom, the polymerization processes carried out in reactors whose inner walls are coated with these agents and polymers obtained from these process.

Build-up suppressor agents, compositions containing them and method of use in polymerization processes

The present invention relates to solid compositions of polymers or copolymers of unsaturated carboxylic acids partially or completely neutralized, a process for the preparation thereof and the use thereof as thickening agents.

Thickening compositions

Compounds of formula ##STR1## wherein R and R.sub.1 can be the same or different and are C.sub.1 -C.sub.18 straight or branched alkyl, C.sub.5 -C.sub.12 cycloalkyl, optionally substituted with one or more C.sub.1 -C.sub.4 alkyl; R.sub.2, R.sub.3 and R.sub.4 can be the same or different and have the same meaning of R or are hydrogen. Said compounds are useful as photostabilizing agents for synthetic polymers and as sunscreens for the protection of human skin from sunburns. When used as photostabilizing agents or sunscreens, the above described compounds are more resistant to hydrolysis.

Sunscreens

Cosmetic compositions containing sunscreens against sun radiation ranging from 280 to 380 nm, and their use for the protection of the skin from UV radiation. The sunscreens comprise, with respect to the weight of the composition:

Sun protecting cosmetic compositions comprising derivatives of

It is disclosed a solution consisting of from 15 to 60% by weight of a compound of formula (I) ##STR1## and from 40 to 85% by weight of at least an ester of formula (II)

Concentrated solutions of a 1,3,5-triazine derivative sunscreen and

Compounds of the general formula I ##STR1## R and R.sub.1, which can be the same or different, are hydrogen or a C.sub.1 -C.sub.8 straight or branched alkyl group, R.sub.2 is hydrogen or the group OR.sub.4, wherein R.sub.4 is a C.sub.1 -C.sub.4 alkyl group,

Benzofuran derivatives and methods for their use as stabilizers and

A composition for stabilizing synthetic polymers consisting of a blend of

Compositions for the stabilization of synthetic polymers

Compounds of formula (I) ##STR1## wherein the groups are as defined in the description, are useful as sunscreens in cosmetics and in the stabilization of synthetic polymers.

Derivatives of benzoxazole useful as UV stabilizers

Stilbene derivatives of formula (I) ##STR1## wherein A, R.sub.1 and R.sub.2 are as defined in the following, are useful for the protection against UV radiation.

Cosmetic and dermatological compositions for the protection against UV

A dispersion consisting of: from 10 to 50% by weight of alkali metal, or amine or ammonium salts of crosslinked acrylic acid polymers or copolymers as dispersed phase and from 50 to 90% by weight of a dispersing phase, characterized in that the dispersing phase consists of a polyether of general formula (I): ##STR1## wherein R is hydrogen, a C.sub.1 -C.sub.18 linear or branched alkyk group, aryl or aryl substituted with one or two C.sub.1 -C.sub.9 alkyl groups, R.sub.1, R.sub.2 and R.sub.3, which may be the same or different, are hydrogen or the methyl group, n, m, and p may take values ranging from 0 to 80 with the proviso that n+m+p is between 1 and 100.

Dispersions of salts of polymers or copolymers of acrylic acid and the

Benzoxazole derivatives having the following formula (I): ##STR1## wherein the groups are hereinafter defined are disclosed together with the use thereof as sunscreen agents and cosmetic compositions containing them.

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Bergamo, Italy

Giuseppe Raspanti