Abstract:
A method for making an epoxyfunctional organosilicon compound is provided, comprising the step of reacting at a temperature of from about 25.degree. to about 100.degree. C. a mixture comprising (A) an ethylenically unsaturated epoxide; (B) an organohydrogenpolysiloxane or organohydrogensilane; and (C) a rhodium complex catalyst selected from the group consisting of:(i) RhX.sub.3 (SR.sub.2).sub.3 ;(ii) RhX.sub.3 .multidot.xH.sub.2 O;(iii) [RhX(norbornadiene)].sub.2 ;(iv) RhX(CO)(R.sub.3 P).sub.3 ;(v) RhX(R.sub.3 P).sub.3 ; and(vi) [RhCl(cyclooctadiene)].sub.2 ;wherein X is a halogen atom, x is a number equal to 3 or 4, and R is an alkyl radical having from 1 to 8 inclusive carbon atoms, aryl, aralkyl, or alkaryl radical or the R.sub.3.sup.1 SiQ-- group in which Q represents a divalent aliphatic hydrocarbon radical having from 1 to 6 inclusive carbon atoms and R.sup.1 represents an alkyl radical having from 1 to 8 inclusive carbon atoms, aryl, aralkyl, or alkaryl radical or a (CH.sub.3).sub.3 Si-- radical.
Abstract:
The present invention relates to epoxy function silicone monomers represented by the formula: ##STR1## wherein each R group is, independently, a monovalent substituted or unsubstituted C.sub.1-12 alkyl, C.sub.1-12 cycloalkyl, or phenyl radical;each R' group is, independently, R, a monovalent C.sub.2-12 alkyl radical, or a monovalent epoxy functional group having 2-10 carbon atoms with the proviso that at least one of the R' groups is epoxy functional;and n is from 3-10.
Abstract:
Triarylsulfonium polyfluoro metal or metalloid salts are provided by effecting the oxidation of a diarylsulfide, while under dehydrating conditions, in the presence of a strong protonic acid. The resulting triarylsulfonium acid salt can thereafter be directly metathesized with an alkali metal or alkaline earth metal polyhalo salt.These compounds have the general formula ##STR1## where Q is selected from .dbd.S.fwdarw.O, --S-- and mixtures thereof, M is a transition metal or metalloid, "c" is an integer of 1 to 3, "d" is an integer of 0 to 3, R.sup.6 is phenyl or naphthyl, R.sup.7 is phenylene or naphthalene optionally substituted with one or more radicals selected from the class consisting of --CH.sub.3, --OCH.sub.3, --CO.sub.2 H, --Br, --Cl, and NO.sub.2.
Abstract:
Polymeric photoactive iodonium salts are provided which are useful as photoinitiators and thermal initiators when used in combination with copper salts for cationically polymerizable organic materials. Methods for making the photoactive polymeric iodonium salts also are provided.
Abstract:
A method is provided for making silicone-organic block polymers, such as polydimethylsiloxane-polystyrene block polymers resulting from the thermal generation of free-radicals in the presence of free-radical polymerizable organic monomer. A silicone prepolymer is used having chemically combined pinacolate groups in the backbone or terminal positions which are capable of generating free-radicals upon thermolysis and which retain chemically combined remnants of such pinacolate diradicals which serve as connecting sites for free-radical polymerized organic blocks.
Abstract:
Water soluble blends are provided of alkanolacrylamide, water soluble hydroxyl containing film forming organic oligomer and an effective amount of an onium salt photoinitiator. These photocurable compositions can be used as photoresists.
Abstract:
Water soluble blends are provided of alkanolacrylamide, water soluble hydroxyl containing film forming organic oligomer and an effective amount of an onium salt photoinitiator. These photocurable compositions can be used as photoresists.
Abstract:
Onium salts of Group IVa elements having an MF.sub.6.sup.- anion, where M is selected from P, As and Sb, have been found to be photo active under ultraviolet light. These onium salts can be employed as cationic photoinitiators when used with a variety of organic resins and cyclic organic compounds.
Abstract:
Low temperature curable organic resin compositions, for example, epoxy resins are provided, which can be either exothermically cured or cured in several minutes or less at relatively low temperatures. Certain diaryliodonium salts have been found to spontaneously release strong protonic acids when used in combination with a copper salt and a reducing agent.
Abstract:
Halogen onium salts, and onium salts of Group VA and V1A elements having an MF.sub.6.sup.- anion, where M is selected from P, As and Sb, have been found to exhibit unusual activity under ultraviolet light. These onium salts can be employed as cationic photoinitiators when used with a variety of organic resins and cyclic organic compounds.