公开(公告)号：US3753958A

公开(公告)日：1973-08-21

申请号：US3753958D

申请日：1971-12-13

Applicant: BAYER AG

Inventor： APPEL H ,  BARTL H ,  WINGLER F ,  PEDAIN J

IPC: C08F2/00 ,  C08F2/02 ,  C08F4/00 ,  C08F4/28 ,  C08F20/52 ,  C08F212/00 ,  C08F220/00 ,  C08F220/04 ,  C08F220/12 ,  C08F220/42 ,  C08G18/62 ,  C08G18/80 ,  C08F1/04 ,  C08F15/40

CPC classification number: C08F220/12 ,  C08G18/6225 ,  C08G18/6266 ,  C08G18/80 ,  C08G2150/20 ,  Y10S524/904

Abstract: COPOLYMER OF FROM 10 TO 70 BY WEIGHT OF AT LEAST ONE ESTER OF ACRYLIC AND/OR METHACRYLIC ACID, 25 TO 75% BY WEIGHT OF AN OPTIONALLY SUBSTITUTED STYRENE, VINYL ESTER OR (METH) ACRLONITRILE, 5 TO 50% BY WEIGHT OF AT LEAST ONE MONOMER FROM THE GROUP OF A,B-MONO-OLEFINICALLY UNSATURATED CARBOXYLIC ACID WITH 3 TO 5 CARBON ATOMS, HYDROXYALKYL ESTERS OF THE FOREGOING ACIDS AND AMIDES AND AMIDES DERIVATIVES OF ACRYLIC AND METHACRYLIC ACID WHICH IS PULVERSIBLE, HAS A SOFTENING RANGE OF FROM 75 TO 110*C. AND AN AVERAGE MOLECULAR WEIGHT OF FRROM ABOUT 500 TO 10,00 AND PROCESS OF PRODUCING THE SAME BY MIXING SAIE COMPONENTS, BULK POLYMERIZING IN A FIRST STAGE TO A CONVERSION OFF 70 TO 90% WITH AN INITIATOR DECOMPOSING INTO RADICALS BELOW 70*C. AND FINISHING BULK POLYMERIZATION IN A SECOND STAGE TO ACONVERSION OF AT LEAST 95% WITH AN INITIATOR DECOMPOSING AT FROM 120 TO 170*C.

公开(公告)号：US3741272A

公开(公告)日：1973-06-26

申请号：US3741272D

申请日：1971-01-28

Applicant: BAYER AG

Inventor： ULLRICH M ,  ERDMENGER R ,  KUNZE H ,  WINGLER F ,  NOTHEN K ,  APPEL H

IPC: B01D1/00 ,  B01J19/20 ,  B29C47/76 ,  C08G18/62 ,  C08G18/71 ,  C08J3/00 ,  C09D5/46 ,  B01D1/28 ,  B01D1/22 ,  C08C11/24 ,  C08C11/36 ,  C08F15/40 ,  C08G51/36

CPC classification number: B29C47/76 ,  B01D1/00 ,  B01J19/20 ,  B29C47/0009 ,  C08G18/6225 ,  C08G18/6266 ,  C08G18/711 ,  C08G2150/20 ,  C08J3/00 ,  Y02P70/26 ,  Y02P70/34 ,  Y10S159/10 ,  Y10S524/904

Abstract: Solvent-free spontaneously cross-linking highly reactive acrylic resins being crosslinkable through N-methylolether groups for powder coatings with a softening point of from 75* - 110* C are obtained from their solutions by continuous concentration through evaporation in a self-cleaning screw evaporator in which the residence times are from 2 to 6 minutes, the resin being heated both through external heating and through internal friction to a temperature not exceeding 120* C.