AU3208884A
Expired / Lapsed
AU
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Alkylenephosphoric acid piperazine derivatives as cement set retarders
Assignee: Dow Chemical Co
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Filing: 1984-08-20
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Granted: —
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Expires: 2004-08-20
Abstract
No abstract record available.
Inventors
- 👤 Druce K. Crump
- 👤 David A. Wilson
Bibliographic Details
Application Number
—
Jurisdiction
AU
Data Source
google_patents
Last Synchronized
2026-11-06 08:59
CPC Classifications
—
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
83 words
31,846-F 31,84( 3,8 -N -C' alka. 2. A process for retarding the setting of an radic aqueous cement slurry which comprises adding to said orgarl slurry an organi.c phosphonate, CHARACTERIZED IN THAT the organic phosphonate is the phosphonomethylated rect~ion product of a dihalo or haloepoxy organic compoaund with amino ethylp iperaz ine; wherein the mole ratio of dihalo or haloepoxy compound to the amine compound is from 0.20 to about 1.0, and wherein at least percent of the amine hydrogens are phosphonomethyl- ated,
Claim 2
Dependent Claim
30 words
The product of Claim 1 wherein the dihalo compound, if present, is a C1 to C2 0 compound, and the haloepoxy compound, if" present, is a C3 to C-0 compound.
Claim 3
Dependent Claim
208 words
A process for retarding the setting of an wher aqueous cement slurry which comprises adding to said an a slurry an organic phosphonate, CHARACTERIZED IN THA2T 4 ca the organic phosphonate is a compound of the formula 1-ic A+kBA)m and wherein A is an organic radical having the formula 31,846-V -12- 31, -N N-CH 2 -CH 2 -N or F-N N-CH 2 -CH 2 N- wherein Z is hydrogen, hydroxyethyl, hydroxypropyl, 0 0t -CH 2 P-(OM)2 -CE 2 COM or BA wherein M is hydrogen, an alkali metal or ammnonium, and wherein B is a divalent radical derived from a dihalo, diepoxy or haloepoxy organic compound having one of the following structures -Si~Q n r02.4C 4CH-C 2 -(O-CH-CH2 *nI I R R 2 -H 5 CB 4CE2 EaC -H 2 C-Ar-CH,-; and OR OH OH R R 1" -HEC-C-Ar-C-CH,-, wherein Ar is R 1 1,- 4 or OH- OHR13 j113 RI.. 4 R'1- wherein n is 1-10, n' is 1-3, and wherein R is hydrogen or methyl and R' is hydrogen, an alkyl radical or a hydroxyalkyl radical having 1 to 4 carbons, a hydroxy radical or a halogen atom, m is 1-10 0 and at least 50% of the Z groups are -CH 2 P-(OM) 2 groups.
Claim 4
Dependent Claim
46 words
The process of Claim 4 wherein m is 1 or 2, 0 B is -orC-t- 0 -CH, and Z is CH 2P-(OM) 2 OH DATED this TWENTIETH aay of AUGUST 1984 THE DOW CHEMICAL COMPANY Patent Attorneys for the App~icant SPRUSON FERGUSON p ~d 0 x
References Cited (Backward Citations)
No citation records indexed.
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