Polymeric foams from transesterified by-product derived from manufacture of dimethyl terephthalate and laminates therefrom
February 1, 2002. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3553172 3647759 3655820 3804810 Urethane modified acrylate resin and process for the production thereof Cellular isocyanurate polymer Terephthalate ester polyols Polyisocyanurate foam comprising reaction product of a polyisocyanate and a polyol mixture comprising a carboxylic ester polyol and a resole polyether polyol using a catalyst comprising dimethylethanolamine and an alkali metal salt of a carboxylic acid Polyisocyanurate foam laminate Rigid polyurethane foam containing polyester residue digestion product and building panel made therefrom InventorsAssigneeApplicationNo. 06/344459 filed on 02/01/1982US Classes:428/304.4, Composite having voids in a component (e.g., porous, cellular, etc.)156/78, Foaming156/79, Subsequent to assembly of laminae264/45.8, Forming indefinite length continuous work264/46.4, Shaping material and uniting to a preform or solidified layer427/244, Filter, sponge, or foam427/373, Cells, foam, or bubbles formed428/317.9, Void-containing component contains also a solid fiber or solid particle428/422.8, Of polyisocyanurate521/117, Ingredient contains a -C-XH group wherein X is a chalcogen atom and the carbon atom is not double-bonded to a chalcogen atom, phenol, etc.521/124, Metal atom is part of an organic compound521/131, Ingredient contains only carbon and hydrogen atoms, only C and halogen atoms, or only C, H, and halogen atoms521/902CELLULAR POLYMER CONTAINING AN ISOCYANURATE STRUCTUREExaminersPrimary: Cockeram, H. S.Attorney, Agent or FirmInternational ClassesC08G 18/00 (20060101)C08G 18/09 (20060101) C08G 18/42 (20060101) AbstractCellular foams, particularly polyisocyanurate foams, are prepared by reacting together an organic polyisocyanate, a blowing agent, a trimerization catalyst, and a minor amount of a polyol mixture prepared by the transesterification with a glycol of a by-product fraction from the manufacture of dimethyl terephthalate, the major portion of said fraction comprising about 15 to 70 weight percent of dimethyl terephthalate, and about 85 to 30 weight percent of a mixture of monomethyl terephthalate, bi-ring esters and polymeric materials. Laminates of such foams exhibit a high degree of fire resistance, low smoke evolution on combustion, low foam friability and high compressive strength.Other References
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