公开(公告)号：US3835080A

公开(公告)日：1974-09-10

申请号：US25007372

申请日：1972-05-03

Applicant: HOECHST AG

Inventor： BURG K ,  HERMANN H ,  SCHLAF H

IPC: C08J3/05 ,  B29C1/04 ,  C08G1/14 ,  C08G1/22 ,  D06M15/30

CPC classification number: C08J3/05 ,  C08J2359/02

Abstract: POLYOXYMETHYLENE ARE DISPERSED IN WATER BY SUSPENDING POLYOXYMETHYLENE PARTICLES IN WATER AND THEN COMMINUTING THE PARTICLES OF THE SUSPENSION, THE POLYOXYMETHYLENE THUS BEING DIRECTLY DISPERSED. FOR THE DIRECT DISPERSION THERE ARE USED POLYOXYMETHYLENES HAVING HYDROPHILIC GROUPS, FOR EXAMPLE, CARBOXYLATE GROUPS. AQUEOUS POLYOXYMETHYLENE DISPERSION THUS PREPARED ARE SUITABLE FOR THE PREPARATION OF COATINGS, IN PARTICULAR FOR PAPER AND TEXTILES.

公开(公告)号：US3848020A

公开(公告)日：1974-11-12

申请号：US28155972

申请日：1972-08-17

Applicant: HOECHST AG

Inventor： BURG K ,  SCHLAF H

IPC: C08G2/00 ,  C08G2/06 ,  C08G4/00 ,  C08G1/04 ,  C08G1/20

CPC classification number: C08G4/00 ,  C08G2/10

Abstract: 1. IN A PROCESS FOR PRODUCING MOLDABLE HOMOPOLYMERS OF TRIOXANE OR COPOLYMERS COMPRISING A MAJOR AMOUNT OF UNITS DERIVED FROM TRIOXANE AND A MINOR AMOUNT OF UNITS DERIVED FROM A LINEAR ACETAL OF AN A,W-DIOL OR A CYCLIC ACETAL OF THE FORMULA

O
WHEREIN R1, R2, R3 AND R4 MAY BE THE SAME OR DIFFERENT REPRESENT HYDROGEN OR AN ALKYL GROUP WHICH CAN BE HALOGEN-SUBSTITUTED, R5 REPRESENTS AN OXYMETHYLENE RADICAL WHICH CAN BE SUBSTITUTED BY AN ALKYL OR HALOGEN-SUBSTITUTED ALKYL GROUP, AND N IS 1 TO 3, OR WHEN N IS 1, R5 CAN BE THE RADICAL -(O-CH2CH2)M-OCH2- WHEREIN M IS 1 TO 3, AT A TEMPERATURE BETWEEN THE MELTING POINT AND BOILING POINT OF THE MONOMER OR MONOMER MIXTURE IN THE PRESENCE OF A PROTONIC ACID, THE IMPROVEMENT WHICH CONSISTS IN USING AN ANHYDROUS PERFLUOROALKYL SULFONIC ACID WITH 1 TO 18 CARBON ATOMS AS THE PROTONIC ACID.

公开(公告)号：DK85376A

公开(公告)日：1976-08-29

申请号：DK85376

申请日：1976-02-27

Applicant: HOECHST AG

Inventor： SEXTRO G ,  BURG K ,  SCHLAF H ,  LEUGERING H J ,  HELLER A

IPC: C08G2/00 ,  B29B9/00 ,  B29B9/12 ,  B29B9/16 ,  C08G2/30 ,  C08J3/12 ,  C08J

公开(公告)号：DK140850C

公开(公告)日：1980-04-28

申请号：DK496675

申请日：1975-11-05

Applicant: HOECHST AG

Inventor： SEXTRO G ,  BURG K ,  LEUGERING H J ,  SCHLAF H ,  HELLER A

IPC: C08G2/00 ,  C08J3/14 ,  C08J3/16

Abstract: Oxymethylene polymers (POM) are obtained in granular form by cooling a POM solution or dispersion having a temperature above the sintering temperature of the POM in two stages to a temperature just below the said sintering temperature. The solvent or dispersion agent used is a mixture of methanol and water and the cooling agent is a methanol/water mixture which may contain POM suspended therein. The granular POM obtained is suitable as technical material for making shaped articles.

公开(公告)号：ZA7702686B

公开(公告)日：1978-04-26

申请号：ZA7702686

申请日：1977-05-05

Applicant: HOECHST AG

Inventor： SABEL H ,  SCHLAF H ,  BURG K ,  SEXTRO G ,  HELLER A

IPC: D01F6/66 ,  C08G2/00 ,  C08G2/18 ,  C08G2/28 ,  C08G2/30 ,  C08G2/38 ,  C08J3/12 ,  C08J3/14 ,  C08L ,  C08J

CPC classification number: C08J3/12 ,  C08G2/18 ,  C08G2/38 ,  C08J2359/02

公开(公告)号：DK395176A

公开(公告)日：1977-03-03

申请号：DK395176

申请日：1976-09-01

Applicant: HOECHST AG

Inventor： BURG K ,  SCHLAF H

IPC: C08G2/00 ,  C08G2/06 ,  C08G2/10 ,  C08G2/18 ,  C08G

公开(公告)号：SE7705211L

公开(公告)日：1977-11-07

申请号：SE7705211

申请日：1977-05-04

Applicant: HOECHST AG

Inventor： SEXTRO G ,  BURG K ,  SCHLAF H ,  SABEL H-D ,  HELLER A

IPC: C08G2/00 ,  D01F6/66 ,  C08G2/18 ,  C08G2/28 ,  C08G2/30 ,  C08G2/38 ,  C08J3/12 ,  C08J3/14

Abstract: of the disclosure: Granular oxymethlene polymers are prepared by cooling a solution or dispersion of an oxymethylene polymer, the temperature of the said solution of dispersion polymer, to a temperature just below the said sintering temperature. As dissolving or dispersing agent there is used a mixture of methanol and water. The cooling of the said solution of dispersion is effected in two stages while using a liquid cooling agent or a cooling device. After precipitation the coarse-granular polymer is separated from the fine-granular portion. It is suitable as engineering plastic for preparing molded articles.

公开(公告)号：DK199477A

公开(公告)日：1977-11-07

申请号：DK199477

申请日：1977-05-05

Applicant: HOECHST AG

Inventor： SEXTRO G ,  BURG K ,  SCHLAF H ,  SABEL H D ,  HELLER A

IPC: D01F6/66 ,  C08G2/00 ,  C08G2/18 ,  C08G2/28 ,  C08G2/30 ,  C08G2/38 ,  C08J3/12 ,  C08J3/14 ,  C08G

Abstract: of the disclosure: Granular oxymethlene polymers are prepared by cooling a solution or dispersion of an oxymethylene polymer, the temperature of the said solution of dispersion polymer, to a temperature just below the said sintering temperature. As dissolving or dispersing agent there is used a mixture of methanol and water. The cooling of the said solution of dispersion is effected in two stages while using a liquid cooling agent or a cooling device. After precipitation the coarse-granular polymer is separated from the fine-granular portion. It is suitable as engineering plastic for preparing molded articles.

公开(公告)号：DK496675A

公开(公告)日：1976-05-08

申请号：DK496675

申请日：1975-11-05

Applicant: HOECHST AG

Inventor： SEXTRO G ,  BURG K ,  LEUGERING H J ,  SCHLAF H ,  HELLER A

IPC: C08G2/00 ,  C08J3/14 ,  C08J3/16

Abstract: Oxymethylene polymers (POM) are obtained in granular form by cooling a POM solution or dispersion having a temperature above the sintering temperature of the POM in two stages to a temperature just below the said sintering temperature. The solvent or dispersion agent used is a mixture of methanol and water and the cooling agent is a methanol/water mixture which may contain POM suspended therein. The granular POM obtained is suitable as technical material for making shaped articles.

公开(公告)号：AU507704B2

公开(公告)日：1980-02-21

申请号：AU2489277

申请日：1977-05-05

Applicant: HOECHST AG

Inventor： SEXTRO G ,  BURG K ,  SCHLAF H ,  SABEL H D ,  HELLER A

IPC: D01F6/66 ,  C08G2/00 ,  C08G2/18 ,  C08G2/28 ,  C08G2/30 ,  C08G2/38 ,  C08J3/12 ,  C08J3/14