Abstract: The invention concerns novel compositions containing at least a polyorganosiloxane (A) with crosslinkable functional groups, stable for use and storing, characterized in that said compositions contain at least a stabilizing amino agent consisting of a polyorganosiloxane (B) functionalised with at least an amino group, and a priming system for hardening by radiation, particularly UV radiation, the polyorganosiloxane (B) being miscible with the polyorganosiloxane (A). In general these stable and cross-linkable compositions are in liquid form and homogeneous.

Abstract: The invention concerns a composition cross-linkable under radiation. The composition includes at least one polyorganosiloxane with cross-linkable functional groups, a stabilizing amino agent, and an initiator system for hardening under radiation. The composition is stable for use and storage.

Abstract: Functional mixed polyorganosiloxanes, well suited for formulation into curable release compositions, notably for paper, comprise the same or different recurring structural units of the formula (I):R.sub.a Y.sub.b X.sub.c SiO.sub.(4-a-b-c)/2 (I)in which the radicals R are each an alkyl, vinyl, aryl or aralkyl radical, at least 80% of the radicals R being methyl radicals, the radicals X are each H or a reactive polar functional group devoid of the heteroatoms nitrogen and sulfur, the radicals Y are at least C.sub.4 alkenyl or alkenyloxy radical containing at least one site of ethylenic unsaturation at a polymer chain end or along the polymer chain, a, b and c are equal to 0, 1, 2 or 3, and a+b+c=0, 1, 2 or 3, with the proviso that the number of SiO.sub.

Abstract: The invention relates to a composition based on crosslinkable epoxy-functional organopolysiloxanes. This composition comprises:A. at least 10% by weight of a linear polyorganosiloxane A (POS) of average general formula (II): ##STR1## in which: R.sub.1 is CH.sub.3, R' is an alkylene containing 2 to 50 C, R is an alkyl having from 6 to 26 C, X is R.sub.1, H, --R'-epoxy or hydroxyl, x=40-150, t=3-9, z=0-5 and y=0,B. at least one second crosslinkable epoxy-functional POS (B), B being present in the proportion of at most 90% by weight and corresponding to: B(a) with x=160-1000, t=1-15, z=0-5 and y=0, B(b) with x=0-120, t=10-30, z=0-5 and y=0, or B(c) with x=0-200, t=0-5, z=0-5 and y=10-90,C. and at least one photoinitiator.This composition can be used in the manufacture of protectors for adhesive bodies ("release liners"), papers or plastics or of liner-free self-adhesive labels.

Abstract: Stable curable silicone compositions, well suited for the deposition of release coatings onto a wide variety of substrates, for example paper or plastic films, comprise a hydrosilylation-curable polyorganosiloxane oil and/or at least one Si alkenylated organopolysiloxane resin and, optionally, at least one organohydrosiloxane resin, an SiH crosslinking agent therefor, a hydrosilylation-inhibiting amount of a long chain acetylenic alcohol, advantageously having a boiling point higher than 250.degree. C., and a catalytically effective amount of a hydrosilylation catalyst, e.g., platinum or a platinum compound/complex.

Abstract: Unique silicone adhesion modifiers well suited for formulation into curable release compositions containing a linear polydiorganosiloxane, comprise an organopolysiloxane resin (A) containing at least 0.1 mol % of alkenyl or alkenyloxyalkylene radicals directly bonded to silicon atoms, an organopolysiloxane resin (B) containing at least 0.5 mol % of hydrogen atoms directly bonded to silicon atoms, and a solvent/diluent (C) for the resins (A) and (B).

Abstract: The dismutation/redistribution of halogenosilanes into silane is carried out by contacting at least one halogenosilane comprising at least one Si-H function with a compound comprising at least one .alpha.-oxoamine group, then by contacting the products of such reaction with a compound also comprising at least one .alpha.-oxoamine group, to selectively dissolve all products of reaction except for the silane therein, and then separating the desired silane therefrom.