公开(公告)号：US3640945A

公开(公告)日：1972-02-08

申请号：US3640945D

申请日：1968-10-01

Applicant: BASF AG

Inventor： RICKER ERNST ,  SCHMIDT FRANZ ,  SCHWARTZ ERICH

IPC: C08G2/00 ,  C08G2/18 ,  C08G2/30 ,  C08G2/36 ,  C08G1/22

CPC classification number: C08G2/36 ,  C08G2/18 ,  C08G2/22 ,  C08G2/30 ,  C08G4/00

Abstract: A PROCESS FOR IMPROVING THE THERMAL STABILITY OF COPOLYMERS OF TRIOXANE WHICH CONTAIN AT LEAST 80% BY WEIGHT OF -O-CH2- GROUPS AND ISTRIBUTED IN THE POLYMER CHAIN IN AMOUNTS OF LESS THAN 20% BY WEIGHT (WITH REFERENCE TO THE COPOLYMER) OF (-)3C-C(-)3 GROUPINGS BY ELIMINATING UNSTABLE PORTIONS OF THE CHAIN BY HEATING WITH AQUEOUS SOLUTIONS OF ALKALI METAL OR ALKALINE EARTH METAL FLUORIDES.

公开(公告)号：FR1411376A

公开(公告)日：1965-09-17

申请号：FR989552

申请日：1964-09-28

Applicant: BASF AG

Inventor： SCHWARTZ ERICH ,  RICKER ERNST ,  SCHMIDT FRANZ

IPC: C08G2/00 ,  C08G2/28 ,  C08K3/16

公开(公告)号：CA832532A

公开(公告)日：1970-01-20

申请号：CA832532D

Applicant: BASF AG

Inventor： SCHWARTZ ERICH ,  RICKER ERNST ,  SCHMIDT FRANZ

公开(公告)号：FR1376795A

公开(公告)日：1964-10-31

申请号：FR949782

申请日：1963-10-07

Applicant: BASF AG

Inventor： DAUMILLER GUENTHER ,  WILHELM HANS ,  LOUIS GERD ,  RICKER ERNST

IPC: C08F283/00 ,  C08L63/00

公开(公告)号：CA822733A

公开(公告)日：1969-09-09

申请号：CA822733D

Applicant: BASF AG

Inventor： SCHWARTZ ERICH ,  RICKER ERNST ,  SCHMIDT FRANZ ,  SANDER BRUNO ,  SPERBER HEINRICH ,  WILHELM HANS

公开(公告)号：CA1031356A

公开(公告)日：1978-05-16

申请号：CA210220

申请日：1974-09-27

Applicant: BASF AG

Inventor： WIRTH FRIEDRICH ,  RICKER ERNST ,  POEHLER GUENTER

IPC: C07D307/89 ,  B01J23/00 ,  B01J23/22 ,  B01J37/02 ,  C07B61/00 ,  C07C51/265 ,  C07C51/31

公开(公告)号：GB1070876A

公开(公告)日：1967-06-07

申请号：GB3757364

申请日：1964-09-15

Applicant: BASF AG

Inventor： SCHWARTZ ERICH ,  RICKER ERNST ,  SCHMIDT FRANZ

IPC: C08G2/00 ,  C08G2/28 ,  C08K3/16

Abstract: Polyacetals obtained by polymerizing a monomer mixture consisting essentially of trioxane in the presence of a catalyst selected from the group consisting of boron trifluoride and a boron trifluoride co-ordination complex core worked up by adding from 0.01 to 5% of a halide selected from the group consisting of lithium chloride and fluoride, sodium chloride and fluoride, potassium chloride and fluoride, cadmium fluoride, strontium fluoride and barium fluoride, melting and homogenizing the resulting composition. Comonomers which may be present are cyclic ethers, acetals, lactones white polymeric ethers and acetals may also be present.

公开(公告)号：FR1465053A

公开(公告)日：1967-01-06

申请号：FR46613

申请日：1966-01-20

Applicant: BASF AG

Inventor： RICKER ERNST ,  SCHMIDT FRANZ

IPC: C07D317/12