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公开(公告)号：DE3027040A1
公开(公告)日：1982-02-25
申请号：DE3027040
申请日：1980-07-17
Applicant: HOECHST AG
Inventor： KLEINER HANS-JERG DR , KNITTEL VOLKER DR , DEBUS GERHARD
Abstract: The invention relates to dimethylphosphinylalkanephosphonic acids of the general formula I, in which n is 1 or 2, which are used as setting retarders for gypsum. I
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公开(公告)号：DE2961928D1
公开(公告)日：1982-03-11
申请号：DE2961928
申请日：1979-02-05
Applicant: HOECHST AG
Inventor： GIRG FRIEDRICH , KNITTEL VOLKER DR
IPC: C08L1/00 , C04B24/38 , C04B28/02 , C08B11/00 , C08K3/22 , C08L1/14 , C08L1/26 , C04B13/24 , C09D3/00
Abstract: This invention relates to an improvement in the process for the preparation of a stable aqueous electrolyte-containing cellulose ether suspension, wherein an inherently water-soluble cellulose ether is added, in the form of solid particles, to an aqueous solution of an electrolyte and uniformly distributed therein, the improvement comprising using a non-ionogenic cellulose ether and adding alumina to the suspension.
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公开(公告)号：CH594605A5
公开(公告)日：1978-01-13
申请号：CH1189573
申请日：1973-08-17
Applicant: HOECHST AG
Inventor： BEERMANN CLAUS DR , KNITTEL VOLKER DR , DUERSCH WALTER DR
IPC: C09K3/00 , C07C227/08 , C07C229/24 , C07D203/08 , C11D3/00 , C11D3/26 , C11D3/33 , C07C101/30 , C11D3/37
Abstract: A complexing agent for metal ions, preferably alkaline earth metal ions, which has the general formula III Y ¦ HN-Z ¦¦ (III) HO-C---CH ¦¦ XOOCCOOX wherein Z is one of the groups -CR3R4-COOX ¦H ¦¦ HC---C-OH ¦¦ XOOCCOOX or R5 ¦ -Cp-H2p-NOH ANGLE CH-CH ANGLE XOOCCOOX wherein, if Z stands for the group ¦ HC--CH-OH ¦¦ XOOCCOOX Y represents hydrogen or methyl and for all the other variants of Z, Y is hydrogen, methyl or lower alkyl or hydroxyalkyl and wherein X is hydrogen or an alkali metal and R3 and R4 independently from each other representing hydrogen, lower alkyl or hydroxyalkyl and R4 furthermore representing the radical -(CH2)m-COOX, m being 1 to 4 and X having the above meaning, R5 representing hydrogen or methyl, and p being 2 or 3, and a process for preparing it.
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公开(公告)号：DE2962810D1
公开(公告)日：1982-07-01
申请号：DE2962810
申请日：1979-08-04
Applicant: HOECHST AG
Inventor： DEBUS GERHARD , GIRG FRIEDRICH , KNITTEL VOLKER DR
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公开(公告)号：DE3027005A1
公开(公告)日：1982-02-18
申请号：DE3027005
申请日：1980-07-17
Applicant: HOECHST AG
Inventor： KLEINER HANS-JERG DR , KNITTEL VOLKER DR , DEBUS GERHARD
Abstract: Use of dialkyl-phosphinyl-alkane-phosphonic acids having formula R1R2P(=O)-(CH2)n-PO3H2 (I) (where R1 and R2 are Me, Et or propyl and n is 1 or 2) as gypsum setting-retarders, is new. In pref. (I), R1 and R2 are both Me. The gypsum compsns. include plaster of Paris, putty-, joint plaster etc. (I) are easily prepd. known cpds., have appreciable gypsum-setting retardant activity and allow sufficient gypsum processing time.
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Patent Agency Ranking
公开(公告)号：AU4985979A
公开(公告)日：1980-02-21
申请号：AU4985979
申请日：1979-08-13
Applicant: HOECHST AG
Inventor： DEBUS GERHARD , GIRG FRIEDRICH , KNITTEL VOLKER DR
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公开(公告)号：CH509404A
公开(公告)日：1971-06-30
申请号：CH1487869
申请日：1969-10-02
Applicant: HOECHST AG
Inventor： KNITTEL VOLKER DR , FRITZ JOACHIM DR GOHLKE , SABEL HANS-DIETER DR
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公开(公告)号：CH646673A5
公开(公告)日：1984-12-14
申请号：CH50883
申请日：1983-01-28
Applicant: HOECHST AG
Inventor： DEBUS GERHARD , KNITTEL VOLKER DR
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公开(公告)号：CH646672A5
公开(公告)日：1984-12-14
申请号：CH115078
申请日：1978-02-02
Applicant: HOECHST AG
Inventor： DEBUS GERHARD , KNITTEL VOLKER DR
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公开(公告)号：DE3160438D1
公开(公告)日：1983-07-21
申请号：DE3160438
申请日：1981-07-09
Applicant: HOECHST AG
Inventor： KLEINER HANS-JERG DR , KNITTEL VOLKER DR , DEBUS GERHARD
Abstract: The invention relates to dimethylphosphinylalkanephosphonic acids of the general formula I, in which n is 1 or 2, which are used as setting retarders for gypsum. I
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