Abstract: Epoxy functional organopolysiloxanes are compatibilized with onium salt photocatalysts by modifying a controlled number of epoxy groups by esterification with carboxylic acids.

Abstract: The 4-acyloxyazetidin-2-ones, which are intermediates in the production of carbapenems and penems, are produced from 4-furanylazetidin-2-ones by singlet oxygen oxidation.

Abstract: Low viscosity elastomeric silicone foam compositions are produced which do not bleed, split or rupture with cure where viscosity is controlled by controlling the content of the vinyl containing polysiloxane portion of the foam.

Abstract: Amine compounds are added to foamable elastomeric silicone foam to reduce foam density.

Abstract: A curable silicone coating composition which is resistant to dirt pickup, comprising:(1) a vinyl chainstopped polysiloxane having a viscosity up to 2,000,000 centipoise;(2) 1 to 2 parts of a resinous organopolysiloxane copolymer per part of (1);(3) a platinum catalyst and,(4) an organohydrogenpolysiloxane crosslinking agent.

Abstract: A transport puck for filling, handling and packaging caulking tubes is disclosed and the process steps involved therewith.

Abstract: A primer composition comprising:(A) 100 parts by weight of copolymer obtained by reacting(1) an acrylic compound represented by the following general formula: ##STR1## wherein R.sup.1 and R.sup.2 respectively represent groups selected from the group consisting of a hydrogen atom and monovalent substituted or non-substituted hydrocarbon group; with(2) a silane compound represented by the following formula: ##STR2## wherein R.sup.3 represents a group selected from the group consisting of a hydrogen atom and monovalent substituted or non-substituted hydrocarbon groups, R.sup.4 represents a monovalent substituted or non-substituted hydrocarbon group, and Q.sup.1 represents a divalent hydrocarbon group having 1 to 6 carbon atoms,in the weight ratio of 0.1 to 1,000 wt % with respect to the component (1), in the presence of a free-radical initiator;(B) 0.

Abstract: A curable silicone coating composition which is resistant to dirt pickup, comprising:(1) a vinyl chainstopped polysiloxane having a viscosity up to 2,000,000 centipoise;(2) 1 to 2 parts of a resinous organopolysiloxane copolymer per part of (1);(3) a platinum catalyst and,(4) an organohydrogenpolysiloxane crosslinking agent.

Abstract: Paper release catalyst blends which are self-emulsifiable and form uniquely stable catalyst emulsions are disclosed. The blends, comprising compatible emulsifiers and organo tin catalysts, disperse in aqueous baths without colloidal milling and retain activity in storage longer than conventional catalyst emulsions.

Abstract: There is provided a method for rendering masonry water repellent which comprises (a) contacting the masonry with a solution comprising an organopolysiloxane resin selected from the group consisting of resins containing R.sub.3 SiO.sub.0/5 units and SiO.sub.2 units and resins containing R.sub.3 SiO.sub.0.5 units, R.sub.2 SiO.sub.2 units and SiO.sub.2 units, the ratio of R.sub.3 SiO.sub.0.5 units to SiO.sub.2 units ranging from about 0.2 to about 0.9:1 and resins containing R.sub.3 SiO.sub.0.5 units, R.sub.2 SiO units, and the ratio of SiO.sub.2 units to SiO.sub.2 units being up to about 0.1:1, where each R is an independently selected substituted or unsubstituted alkyl radical, aryl radical, alkaryl radical, aralkyl radical, cycloalkyl radical or alkenyl radical, and (b) evaporating the solvent. Preferably, the resin solution further comprises an alkylalkoxypolysiloxane resin.

Abstract: There is provided a process for making diglyme soluble siloxane-imide copolymers consisting essentially of (a) heating a mixture of diglyme, azeotropic solvent, organic diamine and bis-aminoalkyl-terminated polydiorganosiloxane to reflux and (b) adding to the refluxing mixture of (a) an organic dianhydride of the formula ##STR1## where Ar is an aromatic or aromatic containing group and Y is oxygen or sulfur. Block copolymers are obtained if the bis-aminoalkyl-terminated polydiorganosiloxane is not added to the reaction mass until after the reaction of the organic diamine and organic dianhydride has been completed.

Abstract: Disclosed is a curable polyorganosiloxane composition which comprises:(A) 100 parts by weight of a polyorganosiloxane having at least two units represented by the following formula in the molecule: ##STR1## wherein R.sup.1 represents an alkenyl group, R.sup.2 represents a substituted or unsubstituted monovalent hydrocarbon group containing no aliphatically unsaturated bond, a is an integer of 1 or 2, b is an integer of 0 to 2, with a+b being an integer of 1 to 3);(B) a polyorganohydrogensiloxane having a unit represented by the following formula and also having at least 3 hydrogen atoms bonded to silicon atoms in the molecule: ##STR2## wherein R.sub.3 represents a substituted or unsubstituted monovalent hydrocarbon group, c is an integer of 0 to 2, d is an integer of 1 or 2, with c+d being an integer of 1 to 3, in an amount such that the number of hydrogen atoms bonded to silicon atoms may be from 0.5 to 4.0 per R.sup.1 in polyorganosiloxane (A);(C) 0.

Abstract: A composition having the general formula ##STR1## wherein each R is independently selected from hydrogen, substituted and unsubstituted organic radicals, and radicals of the formula --R.sup.1 NR.sub.2 where R is as previously defined; R.sup.1 is a divalent organic radical; each R.sup.2 is independently selected from substituted and unsubstituted alkyl radicals having at least 12 carbon atoms; each R.sup.3 is an independently selected organic radical having from 1 to 13 carbon atoms; and a, b, and c are, independently, 0 or a positive integer.