A film of a melt fabricable fluorocarbon copolymer of 40 to 60 mole percent ethylene copolymerized with tetrafluoroethylene, and optionally a minor amount of at least one other copolymerizable monomer; said film when heated for two minutes at 200°C having a shrinkage of 0 to 10 percent in a first direction in the plane of the film, and a shrinkage of at least 5 percent in a second direction which is in the same plane as and perpendicular to the first direction. Upon heat shrinking in the longitudinal direction, the film does not expand in the transverse direction.
Surface treated oriented fluorocarbon films can be laminated to substrates using an adhesive composition of a selected copolymer of vinylidene fluoride and hexafluoropropylene and a selected diisocyanate curing agent in an organic solvent.
[EN] UNSATURATED HYDROXY DIESTER COPOLYMERS AND THEIR USE IN COATING COMPOSITIONS<br/>[FR] COPOLYMERES DE DIESTER HYDROXY INSATURES ET LEUR UTILISATION DANS DES COMPOSITIONS DE REVETEMENT
申请人:PPG INDUSTRIES, INC.
公开号:WO1997013797A1
公开(公告)日:1997-04-17
(EN) A coating composition is disclosed that comprises: (a) a copolymer comprising alternating units of a vinyl monomer and an unsaturated diester monomer in which at least one of the esterifying groups includes a hydroxyl group, and (b) a hydroxy group-reactive curing agent. The diester monomer is formed by first opening an anhydride with an alcohol to form a monoester, and then alkoxylating the remaining acid group on the monoester with an epoxy compound to form a second ester group having hydroxyl functionality.(FR) Cette invention se rapporte à une composition de revêtement, qui comprend: (a) un copolymère contenant des unités alternées d'un monomère de vinyle et d'un monomère de diester insaturé, dans lesquelles au moins l'un des groupes estérifiants renferme un groupe hydroxyle; et (b) un agent durcissant réactif au groupe hydroxy. On forme le monomère de diester d'abord en ouvrant un anhydride avec un alcool, pour former un monoester, puis en alcoxylant le groupe acide restant sur le monoester avec un composé époxy, pour former un second groupe ester ayant une fonctionnalité hydroxyle.