Abstract: A novel, shelf-stable, one-component alkoxy-functional RTV composition having therein as a scavenger an alkoxy-functional silazane compound. The silazane compound can be cyclic or linear and can also be an integrated cross-linking agent.

Abstract: Novel enoxy functional silanes of the general formula: ##STR1## are provided wherein R.sup.1 is a monovalent hydrocarbon radical having 1 to 8 carbon atoms; R.sup.2, R.sup.3 and R.sup.5 are monovalent hydrocarbon radicals having 1 to 13 carbon atoms; R.sup.4 is hydrogen or a monovalent hydrocarbon radical of 1 to 13 carbon atoms; a is an integer equal to 0 to 3; b is an integer equal to 1 to 4, and the sum of a+b equals 1 to 4.

Abstract: A novel, shelf-stable, one-component alkoxy-functional RTV composition having therein as a scavenger an alkoxy-functional silazane compound. The silazane compound can be cyclic or linear and can also be an integrated cross-linking agent.

Abstract: Compounds of the formulae: ##STR1## wherein, Z and Y are each alkylene or oxy-alkylene containing one to about five carbon atoms in the principal chain or said alkylene substituted with OH, alkanoyloxy, alkoxy, mercapto or alkylmercapto;each of R.sub.1, R.sub.2 and R.sub.3 is independently H, alkyl, aryl, halo, alkoxy, alkenyloxy, alkylsulfinyl, alkylsulfonyl, alkylmercapto, cyano, carboxy, carbalkoxy, carboxamido, sulfamoyl, trifluoromethyl, hydroxy, hydroxyalkyl, acyloxy, alkylamino, sulfonylamino, or acylamino; or R.sub.1 and R.sub.2, when taken together, form a methylenedioxy or --O--CO--O--;Ar is heteroaryl, cycloalkyl or ##STR2## wherein, R.sub.1, R.sub.2 and R.sub.3 are as hereindescribed; and R is H, alkyl, cycloalkyl, aryl, aralkyl, alkenyl, alkynyl, carboalkoxy, or CONR.sub.4 R.sub.5 wherein each of R.sub.4 and R.sub.5 is H or alkyl; wherein the total number of carbon atoms in each hydrocarbyl group is up to 10; and ##STR3## wherein, each of R.sub.1 and R.sub.

Abstract: Compounds of the formulae: ##STR1## wherein, Z and Y are each alkylene or oxy-alkylene containing one to about five carbon atoms in the principal chain or said alkylene substituted with OH, alkanoyloxy, alkoxy, mercapto or alkylmercapto;each of R.sub.1, R.sub.2 and R.sub.3 is independently H, alkyl, aryl, halo, alkoxy, alkenyloxy, alkylsulfinyl, alkylsulfonyl, alkylmercapto, cyano, carboxy, carbalkoxy, carboxamido, sulfamoyl, trifluoromethyl, hydroxy, hydroxyalkyl, acyloxy, alkylamino, sulfonylamino, or acylamino; or R.sub.1 and R.sub.2, when taken together, form a methylenedioxy or --O--CO--O--;Ar is heteroaryl, cycloalkyl or ##STR2## wherein, R.sub.1, R.sub.2 and R.sub.3 are as hereindescribed; andR is H, alkyl, cycloalkyl, aryl, aralkyl, alkenyl, alkynyl, carboalkoxy, or CONR.sub.4 R.sub.5 wherein each of R.sub.4 and R.sub.5 is H or alkyl; wherein the total number of carbon atoms in each hydrocarbyl group is up to 10; and ##STR3## wherein, each of R.sub.1 and R.sub.

Abstract: In accordance with the present invention, there is provided a one-component alkoxy-functional RTV silicone rubber composition in which all the ingredients are continuously mixed in, generally, a devolatilizing extruder. In a more preferred embodiment, the polyalkoxy diorganopolysiloxane polymer is first formed in a static mixer and then this polymer along with the other ingredients are continuously mixed in a devolatilizing extruder to continuously form a preferred alkoxy-functional one component RTV composition of the instant case.

Abstract: Substantially silanol-free, alkoxy functional RTV silicone rubber composition. The silanol and alkoxy groups in the composition are scavenged by the use of scavenging leaving groups which are present either in the cross-linking agent or in a separate compound. The scavenging leaving group in the instant composition is a heterocyclic amide functional group.

Abstract: The present invention relates to a shelf stable one component alkoxy-functional RTV composition. In particular, there is utilized a novel end-capping catalyst alone or with a co-catalyst to form a poly-alkoxy terminated diorganopolysiloxane polymer. Such a polymer is formed by reacting a silanol terminal diorganopolysiloxane, either with a polyalkoxy containing silazane cross-linking agent or an integrated cross-linker, scavenger in the presence of the end-capping catalyst.

Abstract: Stable, substantially acid free, one package organopolysiloxane compositions are provided which have a base polymer, a condensation catalyst, a silane scavenger for hydroxy functional groups having cycloaliphatic enoxy functionality, and a curing accelerator, said compositions being curable upon exposure to atmospheric moisture to translucent and colorless tack-free elastomers.

Abstract: There is provided a one package RTV composition which is convertible to a tack-free elastomer comprising:(A) a polydiorganosiloxane base polymer,(B) an effective amount of a condensation catalyst, and(C) a stabilizing amount of organic scavenger for hydroxy groups which has the formula:R--N.dbd.C.dbd.O).sub.xwhere R is a linear or cyclic aliphatic compound or an aromatic compound, and x equals at least 1.

Abstract: There is provided a one package silicone RTV composition which is convertible to a tack-free elastomer, comprising:(A) a polydiorganosiloxane base polymer,(B) an effective amount of condensation catalyst,(C) a stabilizing amount of scavenger for hydroxy functional groups wherein said scavenger contains at least one silicon-bonded hydrogen;(D) optionally, a crosslinking silane;(E) optionally, a cure accelerator; and(F) optionally, a scavenger for hydrogen gas.

Abstract: An ultraviolet radiation-curable silicone coating composition is disclosed which, when applied to a solid substrate, provides an abrasion-resistant coating firmly adhered thereon. The silicone coating composition is free of residual solvent and free of toxic hydroxy acrylates, and is prepared from the hydrolysis products of acryloxy-functional silanes and/or glycidoxy-functional silanes, colloidal silica and a photoinitiator.

Abstract: A process of coating a solid substrate with an abrasion resistant silicone hard coating composition which is curable upon exposure to ultraviolet radiation under a non-inert atmosphere, such as air, is provided. The coating composition is comprised of a combination of UV light crosslinkable polyfunctional acrylate monomers, SiO.sub.2 in the form of colloidal silica, and acryloxy functional silanes and a selected blend of ketone-type and hindered amine-type photoinitiators.

Abstract: Substantially silanol-free, alkoxy functional RTV silicone rubber composition. The silanol and alkoxy groups in the composition are scavenged by the use of scavenging leaving groups which are present either in the cross-linking agent or in a separate compound. The scavenging leaving group in the instant composition is a heterocyclic amide functional group.

Abstract: Silane-functionalized ultraviolet screening agent precursors comprise compounds of the formula: ##STR1## wherein R is ##STR2## R.sup.1 is C.sub.1 -C.sub.6 alkyl, R.sup.2 is C.sub.1 -C.sub.6 alkyl or C.sub.2 -C.sub.6 alkanoyl, R.sup.3 is hydrogen or C.sub.1 -C.sub.6 alkoxyl, X is 0,1 or 2, y is 1,2, or 3 and x+y=3. Under ultraviolet radiation the compounds rearrange to the corresponding .alpha.-hydroxybenzophenones which protect substrates, especially transparent plastics, against degradation.

Abstract: A radiation curable coating composition comprising (A) colloidal silica (B) acryloxy or glycidoxy functional silanes (C) non-silyl acrylates and (D) catalylic amounts of UV light sensitive cationic and radical type photoinitiators is provided, which cures to a transparent hard coating exhibiting improved abrasion resistance.

Abstract: Compounds of the formulae: ##STR1## wherein, Z and Y are each alkylene containing one to about five carbon atoms in the principal chain or said alkylene substituted with OH, alkanoyloxy, alkoxy, mercapto or alkylmercapto;each of R.sub.1, R.sub.2 and R.sub.3 is independently H, alkyl, aryl, halo, alkoxy, alkenyloxy, alkylsulfinyl, alkylsulfonyl, alkylmercapto, cyano, carboxy, carbalkoxy, carboxamido, sulfamoyl, trifluoromethyl, hydroxy, hydroxyalkyl, acyloxy, alkylamino, sulfonylamino, or acylamino; and R.sub.1 and R.sub.2, when taken together, form a methylenedioxy or --O--CO--O--;Ar is heteroaryl, cycloalkyl or ##STR2## wherein, R.sub.1, R.sub.2 and R.sub.3 are as hereindescribed; andR is H, alkyl, cycloalkyl, aryl, aralkyl, alkenyl, alkynyl, carboalkoxy, or CONR.sub.4 R.sub.5 wherein each of R.sub.4 and R.sub.5 is H or alkyl; wherein the total number of carbon atoms in each hydrocarbyl group is up to 10;and ##STR3## wherein, each of R.sub.1 and R.sub.

Abstract: A selective process for the preparation of 1-aminoanthraquinones from the corresponding 1-aminoanthraquinone-2-carboxylic acid by decarboxylation in an acid solution in the presence of iron or zinc as a catalyst.

Abstract: Silane-functionalized ultraviolet screening agent precursors comprise compounds of the formula: ##STR1## wherein R is ##STR2## R.sup.1 is C.sub.1 -C.sub.6 alkyl, R.sup.2 is C.sub.1 -C.sub.6 alkyl or C.sub.2 -C.sub.6 alkanoyl, R.sup.3 is hydrogen or C.sub.1 -C.sub.6 alkoxyl, X is 0,1 or 2, y is 1,2, or 3 and x+y=3. Under ultraviolet radiation the compounds rearrange to the corresponding .alpha.-hydroxybenzophenones which protect substrates, especially transparent plastics, against degradation.

Abstract: A selective process for the preparation of 1-aminoanthraquinones from the corresponding 1-aminoanthraquinone-2-carboxylic acid by decarboxylation in basic solution in the presence of iron, tin or zinc as a catalyst.