Expandable tfe copolymers, method of making, and porous,...

Details Expandable tfe copolymers, method of making, and porous,... Expandable tfe copolymers, method of making, and porous,...

C - Chemistry, Metallurgy

08

F

C08F 214/26 (2006.01) C08J 9/00 (2006.01)

Patent

CA 2699608

A process for the polymerization of a true tetrafluoroethylene (TFE) copolymer of the fine powder type is provided, wherein the copolymer contains polymerized comonomer units of at least one comonomer other than TFE in concentrations of at least or exceeding 1.0 weight percent, and which can exceed 5.0 weight percent, wherein the copolymer is expandable, that is, the copolymer may be expanded to produce strong, useful, expanded TFE copolymeric articles having a microstructure of nodes interconnected by fibrils.

L'invention porte sur un procédé de polymérisation d'un copolymère de tétrafluoroéthylène (TFE) vrai de type en fine poudre, suivant lequel le copolymère contient des unités comonomères polymérisées d'au moins un comonomère autre que le TFE dans des concentrations d'au moins ou dépassant 1,0 pour cent en poids, et qui peut dépasser 5,0 pour cent en poids. Le copolymère est expansible, autrement dit le copolymère peut être expansé pour produire des articles copolymères de TFE expansés, utiles, résistants, ayant une microstructure de nuds interconnectés par des fibriles.

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