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公开(公告)号：DE1644487A1
公开(公告)日：1971-07-15
申请号：DE1644487
申请日：1968-02-22
Applicant: BASF AG
Inventor： SCHROEDEL RUDOLF DR , RIEDEL GUENTHER DR , ANDREE FRANZ DR
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公开(公告)号：CH502429A
公开(公告)日：1971-01-31
申请号：CH1225368
申请日：1968-08-15
Applicant: BASF AG
Inventor： ANDREE FRANZ DR , BURKHARDT HANS DR , RIEDEL GUENTHER DR
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Patent Agency Ranking
公开(公告)号：DE2138179A1
公开(公告)日：1973-02-08
申请号：DE2138179
申请日：1971-07-30
Applicant: BASF AG
Inventor： SCHMEIDL KARL DR , ANDREE FRANZ DR
Abstract: Esterified rhodamine dyes of formula: (in which R, R2, R4 and R7 are methyl or ethyl; R1 and R3 are H, methyl or ethyl; R5 and R6 are H or methyl), are prepd. by reaction of bases of formula: with di(m)ethyl sulphate in water-miscible solvents contg. oxygen, the solvent is prefd. being a glycol and/or glycol ether. The reaction can be carried out at very high dye concns. and esterification is so complete that purification of the soln. obtd. is unnecessary. The solns. are suitable for dyeing paper.
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公开(公告)号：DE1769078A1
公开(公告)日：1971-03-18
申请号：DE1769078
申请日：1968-03-29
Applicant: BASF AG
Inventor： ANDREE FRANZ DR , RIEDEL GUENTHER DR , BURKHARDT HANS DR
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公开(公告)号：DE1644434A1
公开(公告)日：1971-04-29
申请号：DE1644434
申请日：1965-08-07
Applicant: BASF AG
Inventor： ANDREE FRANZ DR , KOHL KARL DR , RIEDEL GUENTHER DR
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公开(公告)号：CH481192A
公开(公告)日：1969-11-15
申请号：CH1130966
申请日：1966-08-05
Applicant: BASF AG
Inventor： ANDREE FRANZ DR , KOHL KARL DR , RIEDEL GUENTHER DR
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公开(公告)号：CH477509A
公开(公告)日：1969-08-31
申请号：CH1824266
申请日：1966-12-20
Applicant: BASF AG
Inventor： ANDREE FRANZ DR , KOHL KARL DR , RIEDEL GUENTHER DR
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