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公开(公告)号：US3627830A
公开(公告)日：1971-12-14
申请号：US3627830D
申请日：1969-02-03
Applicant: BASF AG
Inventor： KERBER HORST , HOHENSCHUTZ HEINZ , RAUCH KONRAD
IPC: C08K5/20 , C07C103/00
CPC classification number: C08K5/20
Abstract: Production of pure N-dimethylacylamides having from two to four carbon atoms in the acyl radical by reaction of an excess of dimethylamine with an aliphatic carboxylic acid having two to four carbon atoms at elevated temperature and distillation of the N-dimethylacylamide formed, the distillation being carried out continuously in a column. Dimethylamine and the carboxylic acid in the molar ratio from 1.1:1 to 5:1 are introduced at from 80* to 220* C. and from 0.1 to 2 atmospheres in the absence of any catalyst into a mixture of N-dimethylacylamide and its carboxylic acid, the carboxylic acid content of the mixture corresponding at least to the amount of carboxylic acid present in the azeotropic mixture of the N-dimethylacylamide and its carboxylic acid. Ndimethylacylamides are used as solvents for polymers.
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公开(公告)号：US3528891A
公开(公告)日：1970-09-15
申请号：US3528891D
申请日：1967-10-09
Applicant: BASF AG
Inventor： RAUCH KONRAD , SCHMEIDMEIR WALTER
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3.发明授权Production of hydrolysis-resistant polyurethane elastomers based on adipic acid; 1,6-hexanediol; 2,2,4-trimethyl-1,3-pentanediol polyesters 失效基于ADIPIC生产抗水性聚氨酯弹性体; 1,6-HEXANEDIOL; 2,2,4-三甲基-1,3-苯二酚聚酯
公开(公告)号：US3496144A
公开(公告)日：1970-02-17
申请号：US3496144D
申请日：1966-11-29
Applicant: BASF AG
Inventor： KUNDE JOACHIM , WILHELM HANS , DOERFEL HELMUT , RAUCH KONRAD
CPC classification number: C08G18/4238 , C08G18/10 , Y10S528/903 , Y10S528/906 , C08G18/30
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