Abstract: A sunscreen composition containing a UV-B dibenzoylmethane derivative, such as 4-(1,1-dimethylethyl)-4′-methoxydibenzoylmethane (PARSOL 1789), and a stabilizer/solubilizer for the dibenzoylmethane derivative selected from formula (I) and formula (II), and mixtures thereof: wherein m=5, 7, 9 or mixtures and n=4, 6, 8 or mixtures; wherein p1 m=5, 7 or mixtures and n=4, 6 or mixtures. These long branched chain alkyl hydroxybenzoates and long branched chain benzoates having a C4+ branch at the 2 position are quite effective in stabilizing the dibenzoylmethane derivative UV-B filter compounds making them more effective; effective for longer periods of time.

Abstract: A sunscreen composition containing a UV-A dibenzoylmethane derivative, such as 4-(1,1-dimethylethyl)-4'-methoxydibenzoylmethane (PARSOL.RTM. 1789), and a stabilizer/solubilizer for the dibenzoylmethane derivative having formula (I): ##STR1## These long branched chain alkyl salicylates having a C.sub.4 branch at the 2 position are quite effective in stabilizing the dibenzoylmethane derivative UV-B filter compounds making them more effective; effective for longer periods of time.

Abstract: A sunscreen composition containing a UV-A dibenzoylmethane derivative, such as 4-(1,1-dimethylethyl)-4'-methoxydibenzoylmethane (PARSOL.RTM. 1789), and a stabilizer/solubilizer for the dibenzoylmethane derivative having formula (I): ##STR1## wherein m=5, 7, 9 or mixtures andn=4, 6, 8 or mixtures;These long branched chain alkyl salicylates having a C.sub.4.sup.+ branch at the 2 position are quite effective in stabilizing the dibenzoylmethane derivative UV-B filter compounds making them more effective; effective for longer periods of time.

Abstract: A sunscreen composition containing a UV-B dibenzoylmethane derivative, such as 4-(1,1-dimethylethyl)-4'-methoxydibenzoylmethane (PARSOL 1789), and a stabilizer/solubilizer for the dibenzoylmethane derivative selected from formula (I) and formula (II), and mixtures thereof: ##STR1## wherein m=5, 7, 9 or mixtures and n=4, 6, 8 or mixtures; ##STR2## wherein m=5, 7 or mixtures and n=4, 6 or mixtures.These long branched chain alkyl hydroxybenzoates and long branched chain benzoates having a C.sub.4.sup.+ branch at the 2 position are quite effective in stabilizing the dibenzoylmethane derivative UV-B filter compounds making them more effective; effective for longer periods of time.

Abstract: A plasticized polyvinyl chloride (PVC) resin composition and method of plasticizing and decreasing the hydrophobicity of said PVC resin for adherence of aqueous coating compositions, such as water-based inks, by incorporating into the PVC resin a polymeric plasticizer for PVC, a monomeric diacid plasticizer, comprising primarily a C.sub.5, C.sub.4 or C.sub.3 diacid plasticizer, or mixtures, in a ratio of polymeric/monomeric plasticizers of 5/95 to 95/5, preferably 90/10 to 60/40, and at least about 0.1%, based on the weight of the PVC resin, of a metal salt additive, wherein the metal salt is an oxide or a hydroxide and has an oxidation state of plus two, three or four, preferably calcium oxide and/or calcium hydroxide. The monomeric/polymeric plasticizer combination together with the metal salt additive(s) unexpectedly decreases the hydrophobicity of the PVC surface for strong adherence of water-based inks and coatings thereto.

Abstract: Surfaces containing hydroxyl groups are rendered water-repellent through exposure to hydridoaminosilanes of the general formulaH.sub.x Si(NRH).sub.y (NR.sub.2.sup.1).sub.3-yIn particular, tris(dimethylamino)silane and its derivatives have been found to make substrates with hydroxyl-containing surfaces hydrophobic without adversely effecting the physical properties of the substrate being treated and without the necessity of and pre- or post-treatment steps (i.e. moisturizing, neutralizing, etc.).

Abstract: A method of preparing silazane polymers, with 3 or more repeating units, of the general formula--((CH.sub.3).sub.2 N).sub.e Si(R).sub.a (R'HN).sub.f H.sub.c (NR').sub.g --and a (CH.sub.3).sub.2 NH byproduct group where R is hydrogen, an alkyl group having 1-6 carbon atoms or an aryl group having 6-12 carbon atoms, a=0, or 1, b=2-4, C=0-2, d=0 or 1, e=0-2, f=0-2, g=1-3 and a+c+e+f+g=4 for the polymer units; and R' is hydrogen or methyl, whereby the silazane polymer is substantially free of halide impurities, and wherein this method comprises:transaminating an aminosilane of the general formula (R).sub.a ((CH.sub.3).sub.2 N).sub.b H.sub.c S; where R is defined as above and a+b+c=4 with an amine of the general formula (CH.sub.3).sub.d NH.sub.3-d whereby d is defined as above and the amine has a molecular weight lower than 45 all in the presence of an acid catalyst or the ammonium salt of the acid and thereafter condensing to form the polymer.

Abstract: Triacetoxysilanes are prepared by adding a tris(amino)silane to acetic anhydride and maintaining the reaction mix at a temperature no greater than about 50.degree. C.

Abstract: Silyl carbamates are produced by the reaction under suitable reaction conditions of silanes bearing at least one silicon-hydrogen bond of the formula: R.sub.4-x SiH.sub.x with an ammonium carbamate of the formula: R'R"NH.sub.2.sup..sym. R'R"NCO.sub.2.sup..crclbar.. This novel route is much simpler and more direct than those previously known and provides a new classes of silyl carbamates.

Abstract: A hydrogen bearing silyl carbamate of the general formula:HSiR.sub.n (O.sub.2 CNR'R").sub.3-nis synthesized from hydrogen bearing aminosilane and gaseous carbon dioxide. The resulting hydrogen bearing silyl carbamate is novel in the single hydrogen attached to the silyl carbamate and represents a major new compound for creating novel compositions of matter.

Abstract: A process whereby silanes of the general formula:HSi(NRR').sub.x (R").sub.3-xwherein R, R' and R" are independently an aliphatic or aromatic, substituted or unsubstituted, saturated or unsaturated hydrocarbon radical having from one to eight carbon atoms, inclusive and R and R' may also be hydrogen and where R" may also be alkoxy and where x has a value from one to three are reacted in the presence of a catalyst with alcohols in the stoichiometry of approximately one equivalent of alcohol per mole of silicon-nitrogen bond to give unexpectedly high yields of alkoxyhydridosilanes. In the reaction the silyl amine groups have been replaced by alkoxide groups without significant loss of the silicon-hydrogen group. Similar reactions in the absence of a catalyst give undesirably low yields of the corresponding alkoxy silanes and, in most cases, substantial loss of silyl hydrogen groups.

Abstract: A process whereby silanes of the general formulaHSi(NRR.sup.I).sub.x (R.sup.II).sub.3-xare reacted in the presence of a catalyst with oximes or hydroxylamines in the stoichiometry of approximately one equivalent of oxime or hydroxylamine per mole of silicon-nitrogen linkage to give unexpectedly high yields of substituted silanes.