Patent ID: 7687121
Filing Date: 2010-03-30
Classification: B82Y,C03C,C08J,C08K,C09K,Y10T

Abstract:
1. An insulated glass unit comprising at least two spaced-apart sheets of glass in spaced relationship to each other, a low thermal conductivity insulating gas or mixture of gases there between and a gas sealant element including a cured sealant composition resulting from the curing of a curable sealant composition, said cured sealant having an argon permeability coefficient of less than about 900 barrers, comprising: a) at least one silanol-terminated diorganopolysiloxane; b) at least one crosslinker for the silanol-terminated diorganopolysiloxane(s) which is an alkylsilicate having the formula: where R 14 , R 15 , R 16 and R 17 are chosen independently from monovalent C 1 to C 60 hydrocarbon radicals; c) at least one catalyst for the crosslinking reaction; d) a gas barrier enhancing amount of at least one inorganic-organic nanocomposite wherein the inorganic-organic nanocomposite comprises at least one inorganic component which is a layered inorganic nanoparticulate and at least one organic component which is a quaternary ammonium organopolysiloxane having the formula: wherein “a” is 2, and “b” is equal to or greater than 1 and “c” is positive; M is wherein “x” is 0, 1 or 2 and “y” is either 0 or 1, subject to the limitation that x+y is less than or equal to 2, “z” is 2, R 1 and R 2 each independently is a monovalent hydrocarbon group up to 60 carbons; R 3 is selected from the group consisting of H and a monovalent hydrocarbon group up to 60 carbons; R 4 is a monovalent hydrocarbon group up to 60 carbons; D is where R 5 and R 6 each independently is a monovalent hydrocarbon group up to 60 carbon atoms; and D′ is where R 7 and R 8 each independently is a monovalent hydrocarbon group containing amine with the general formula: wherein “a” is 2, R 9 is selected from the group consisting of H and a monovalent hydrocarbon group up to 60 carbons; R 10 is a monovalent hydrocarbon group up to 60 carbons; and, e) at least one solid polymer having a permeability to gas that is less than the permeability of the crosslinked diorganopolysiloxane(s).