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US 5,753,744 AGranted
Cement and cement composition having improved rheological properties
AssigneeW.R. Grace & Co.-Conn.
InventorsDavid Charles Darwin, Ellis Martin Gartner, Ahmad Arfaei, Xiaojia Zhang
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Abstract
An improved hydraulic cement and resultant hydraulic cement composition which has an alkyl terminated alkoxy amine derivative of maleic acid based polymer or copolymer uniformly distributed therein.
Claims31
An improved cement comprising a substantially uniform mixture of a hydraulic cement and from 0.005 to 5 weight percent based on the weight of said hydraulic cement of a polymer composed of units represented by the structure of:
- ##STR3## wherein R' represents an oxyalkylene or polyoxyalkylene group represented by the formula (AO).sub.n R"" in which A is a C.sub.2 -C.sub.10 alkylene or mixtures thereof, O is oxygen atom, n is a value of 1 to 200, and R"" is selected from a C.sub.1 -C.sub.10 alkyl group, C.sub.5 -C.sub.6 cycloalkyl group, aryl group or mixtures thereof:
- X and Y each independently represent NHR', OH, O.sup.- M.sup.+ where M is an alkali metal, or ammonium cation, or X and Y together represent --O.sup.- M.sup.++ O.sup.- -- when M.sup.++ is an alkaline earth metal cation. R" represents hydrogen atom or methyl group;
- Z represents unsubstituted or substituted aryl or C.sub.5 -C.sub.6 cycloalkyl or a heterocyclic group or the group OR"', where R"' represents a C.sub.1 -C.sub.5 alkyl or C.sub.5 -C.sub.6 cycloalkyl group or the group C(O)X, where O and X are the same as defined above;
- and a, b, and c each represent molar percentages of the polymer's structure such that in a particular polymer a has a positive value up to 100, b has a value of from 0 to 100, the sum of a plus b from about 20 to 100, and c has a value of from 0 to 80;
- and wherein the oxyalkylene groups are present in at least about 5 weight percent of the polymer.
2 more elements
A polymer having units represented by the formula:
- ##STR4## wherein R' represents an oxyalkylene or polyoxyalkylene group represented by the formula (AO).sub.n R"" in which A is a C.sub.2 -C.sub.10 alkylene or mixtures thereof, O is oxygen atom, n is a value of 1 to 200, and R"" is selected from a C.sub.5 -D.sub.6 alkyl group, C.sub.1 -C.sub.6 cycloalkyl group, aryl group or mixtures thereof;
- X and Y each independently represent NHR', OH, O.sup.- M.sup.+ where M is an alkali metal, or ammonium cation, or X and Y together represent --O.sup.- M.sup.++ when M.sup.++ is an alkaline earth metal cation;
- R" represents hydrogen atom or methyl group:
- Z represents unsubstituted or substituted aryl or C.sub.5 -C.sub.6 cycloalkyl or a heterocyclic group or the group OR'", where R"' represents a C.sub.1 -C.sub.5 alkyl or C.sub.5 -C.sub.6 cycloalkyl group or the group C(O)X, where O and X are the same as defined above;
- and a, b, and C each represent molar percentages of the polymer's structure such that in a particular polymer a has a positive value up to 100, b has a value of from 0 to 100, the sum of a plus b is from about 20 to 100, and c has a value of from 0 to 80;
- and wherein the oxyalkylene groups are present in at least about 5 weight percent of the polymer.
3 more elements
Dependencies are inferred from the claim text.