Patent ID: 8691372

Claim:
A safety glass laminate prepared by a process comprising the steps of: providing a polymeric film or sheet; wherein the polymeric film or sheet consists essentially of an ionomeric composition; wherein said polymeric film or sheet is formed from a melt of the ionomeric composition, and said melt is processed a temperature sufficiently low to prevent premature cross-linking in the ionomeric composition; and wherein said ionomeric composition consists essentially of: an ionomeric copolymer consisting essentially of copolymerized repeat units of ethylene; about 10 to about 30 wt %, based on the total weight of the ionomeric copolymer, of copolymerized repeat units of at least one alpha,beta-ethylenically unsaturated carboxylic acid selected from the group consisting of acrylic acid, methacrylic acid, itaconic acid, maleic acid, maleic anhydride, fumaric acid, and monomethyl maleic acid; and 0 to about 50 wt %, based on the total weight of the ionomeric copolymer, of copolymerized repeat units of one or more other unsaturated comonomers selected from the group consisting of methyl acrylate, methyl methacrylate, ethyl acrylate, ethyl methacrylate, isopropyl acrylate, isopropyl methacrylate, butyl acrylate and butyl methacrylate; wherein the ionomeric copolymer is neutralized to a level of 1 to 100 mol %, based on the total number of moles of carboxylate groups in the ionomeric copolymer, and said ionomeric copolymer further comprises one or more metal ions; and further wherein the ionomeric copolymer has a Melt Index of about 20 to about 300 g/10 min, as measured by ASTM D1238 at 190° C. and under a load of 2160 g; about 0.5 to about 3 wt % of at least one organic peroxide, based on the total weight of the ionomeric composition; optionally about 0.01 to about 5 wt % of one or more silane coupling agents, based on the total weight of the ionomeric composition; and optionally one or more additives selected from the group consisting of initiators, inhibitors, plasticizers, processing aides, flow enhancing additives, lubricants, pigments, dyes, flame retardants, impact modifiers, nucleating agents, antiblocking agents, thermal stabilizers, UV absorbers, UV stabilizers, hindered amine light stabilizers, dispersants, surfactants, chelating agents, coupling agents, adhesives, primers, reinforcement additives and fillers; laying up the polymeric film or sheet with at least one rigid sheet layer and optionally at least one additional layer to form a pre-laminate assembly; subjecting the pre-laminate assembly to heat and optionally vacuum or pressure to form the safety glass laminate; and heating the safety glass laminate at a temperature sufficient to cause the peroxide to cross-link and cure the ionomeric composition.