Patent ID: 8859635
Filing Date: 2014-10-14
Classification: C08G,C08L,C09D,Y10T

Abstract:
1. Silicone composition capable of cross-linking/curing by polyaddition, for forming a coating which is water-repellent and non-stick on a support, and comprising: (A) an alkenylated silicone component containing at least one functional silicone oil comprising at least one PolyOrganoSiloxane (POS) comprising units of formula (I.1) in which: W represents independently a functional alkenyl group, Z represents independently a monovalent hydrocarbon group, with no unfavourable effect on the activity of the catalyst and selected from the group consisting of the methyl, ethyl, propyl and 3,3,3-trifluoropropyl groups, a is 1 or 2, b is 0, 1 or 2 and a+b is between 1 and 3; (B) at least one cross-linking silicone oil comprising at least one hydrogenated POS having, per molecule, at least three hydrogen atoms bound to the silicon; (C) at least one catalyst comprising at least one metal belonging to the platinum group; (D) at least one attachment promoting additive containing at least one epoxidated silicone oil comprising at least one PolyOrganoSiloxane (POS) comprising: formulae in which: Y represents independently a linear, branched or cyclic epoxy-functional hydrocarbon group; Y′ represents independently an alkoxy-functional group; Z c is 1 or 2, d is 0, 1 or 2 and c+d is between 1 and 3; e is between 0 and 3; g is 1 or 2, h is 0, 1 or 2 and g+h is between 1 and 3; i is 1 or 2, j is 0, 1 or 2 and i+j is between 1 and 3; this attachment promoting additive (D) comprising, per molecule, a Si—H unit level at essentially zero, so as to obtain a pot life in a non-gelified liquid state of at least one year, wherein the attachment promoting additive (D) can be preserved for a period of at least one year in a non-gelified liquid state and suitable for use in a composition to be applied to a support in order to form a non-stick coating; (E) optionally at least one cross-linking inhibitor; (F) optionally, an adhesion modulating system; (G) optionally, at least one diluent; (H) optionally, at least one other functional additive, in particular a “processing aid” operating auxiliary of the “anti-misting” additive type, wherein the attachment promoting additive (D) is selected from the group of silicones consisting of: 1. the POSs containing: (I.2) units with c=1 and c+d=2: D optionally (I.2) units with c=1 and c+d=3: M optionally (I.3) units with e=2: D optionally (I.4) units with e=1 and g+h=2: D optionally (I.4) units with e=1 and g+h=3: M optionally (I.5) units with i=1 and i+j=2: D′ optionally (I.5) units with i=1 and i+j=3: M′ of formula with 0≦d 0≦d 1≦d 0≦d′<1; 0≦m′<1; d′+m′ being less than 1; 0≦m 2. the POSs of average formula: with d 3. and mixtures thereof, the attachment promoting additive (D) comprising at least one photoinitiator composition.