专利名称：POLY%ESTER-URETHANE< LAMINATES 发明人：NELSON VERNARD SEEGER,ANDREW JOSEPH KAMAN
申请号：AU4357072
申请日：19720619
公开号：AU4357072A
公开日：
凉拌鸡胗
血液科出科小结
19740103
专利内容由知识产权出版社提供
干锅肥肠怎么做
摘要：1399124 Transparent laminates PPG INDUSTRIES Inc 21 June 1972 [21 June 1971 10 April 1972] 28976/72 Heading B5N An optically-clear, energy absorbing laminate compris at least one glass sheet bonded to a sheet of substantially unreacted isocyanate free thermoplastic, transparent, polyester urethane drived from (a) a hydroxy-terminated polyester having linkages, a number average molecular weight between 500 and 5000 and melting above 50‹ C., said polyester either being derived from a caprolactone or being the reaction product of an aliphatic or aromatic diol and an aliphatic or aromatic dibasic acid, (b) an aliphatic or cycloaliphatic hydrocarbon diisocyanate, and (c) an active hydrogen compound containing two active hydrogens per molecule reactive with isocyanate groups and having a molecular weight of less than 250, the mole ratio of (c) to (a) being from 0À5 : 1 to 10 ; 1 and increasing with increasing molecular weight of (a), the isocyanate groups provided by (b) being substantially numerically equivalent to the sum of active hydrogens and hydroxyl groups provided by (c) and (a) to provide a polyesterurethane that is substantially free of unreacted isocyanate groups, said mole ratio of (c) to (a) being so proportioned within said range that a rigidly held laminate prepared from sheeting about 0À030 inch thick of said豆果网
polyester-urethane sandwiched between two 12 x 12 Î 1/8 inch sheets of glass is non-brittle at 0‹ F. a保存近义词
nd exhibits a mean penetration velocity of at least 20 miles hour at laminate temperatures of 0‹, 70‹ and 120‹ F. when impacted with a five pound free falling steel ball. In an embodiment of the invention, a minor proportion of the polyester is replaced by a different polymer. Many suitable reactants for producing the polyester urethanes are listed and preparatory examples are given. The laminates of the invention may be made by heating the components asmbled in a bag, firstly under vacuum and condly in an autoclave. A preferred embodiment compris two sheets of glass, one of which may be releasable, sandwiching the polyester-urethane. When a sandwich laminate is made, the polyester-urethane layer may be formed in situ between two glass sheets. The product of the invention may be ud as motor vehicle windscreens.
为什么新车油耗高
仔字组词申请人：PPG INDUSTRIES, INC.
更多信息请下载全文后查看
>关于丁香花的诗句
