公开(公告)号：US3352945A

公开(公告)日：1967-11-14

申请号：US40654064

申请日：1964-10-26

Applicant: SNIA VISCOSA

Inventor： ATTILIO PALVARINI ,  EDGARDO HORAK ,  FRANCO MILIZIA

IPC: C08G2/38

CPC classification number: C08G2/38 ,  Y10S525/938

公开(公告)号：US3342793A

公开(公告)日：1967-09-19

申请号：US27490763

申请日：1963-04-23

Applicant: SNIA VISCOSA

Inventor： ATTILIO PALVARINI ,  ANNAMARIA PARENTELA ,  SABINO CAPORALE

IPC: C08F4/64 ,  C08F10/00

CPC classification number: C08F10/00 ,  Y10S526/905 ,  Y10S526/907 ,  C08F4/16

公开(公告)号：US3280076A

公开(公告)日：1966-10-18

申请号：US28519963

申请日：1963-06-04

Applicant: SNIA VISCOSA

Inventor： ATTILIO PALVARINI ,  EZIO MERLUZZI ,  CESANO MADERNO ,  EDGARDO HORAK

IPC: C08G2/00

CPC classification number: C08G2/06 ,  C08G2/08

公开(公告)号：US3327037A

公开(公告)日：1967-06-20

申请号：US32052763

申请日：1963-10-31

Applicant: SNIA VISCOSA

Inventor： ATTILIO PALVARINI ,  ANGELO BRESCIANI

IPC: D01F6/08

CPC classification number: D01F6/10

公开(公告)号：CH437801A

公开(公告)日：1967-06-15

申请号：CH514363

申请日：1963-04-24

Applicant: SNIA VISCOSA

Inventor： ATTILIO PALVARINI ,  SABINO CAPORALE ,  ANNAMARIA PARENTELA

IPC: C08F4/64 ,  C08F10/00 ,  C08F3/02

公开(公告)号：DE1292313B

公开(公告)日：1969-04-10

申请号：DES0088875

申请日：1963-12-23

Applicant: SNIA VISCOSA

Inventor： ATTILIO PALVARINI ,  ANGELO BRESCIANI

IPC: D01F6/08

Abstract: 1,034,480. Spinning polyvinyl chloride. SNIA VISCOSA SOC. NAZIONALE INDUSTRIA APPLICAZONI VISCOSA S.p.A. Dec. 11, 1963 [Dec. 24, 1962], No. 48967/63. Heading B5B. Filaments formed of polyvinyl chloride containing 20-40% crystalline fraction are made by dissolving the polymer at a temperature of 80-200‹ C. in tetrahydrofuran or cyclohexanone, and spinning the viscous solution so formed into a coagulating bath maintained at a temperature of 60-150‹ C. constituted by an aqueous solution of ammonium sulphocyanide, alkali-metal sulphocyanide or mixtures thereof, or by an aqueous solution of zinc chloride, and then stretching the spun filaments at a temperature not less than 100‹ C. to a ratio of 1: 4 to 1: 11. The concentration of polyvinyl chloride in the spinning solution may be 5-40% by weight and the salt concentration in the coagulating bath may be 10-70% by weight. The filaments may be stretched at 100-180‹ C. in boiling water or ethylene glycol. Spinning solvent may be recovered from the coagulating bath, which should not contain more than 22% by weight of solvent, by distillation or solvent extraction.