Cementitious compositions comprising a water soluble polymer and a cross-linking agent therefor

Patent 4778529 Issued on October 18, 1988. Estimated Expiration Date:

October 14, 2006. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

2053842

3215549

3272771

Solvent-soluble substances characterized in that water-soluble cellulose ethers are chemically bonded to water-soluble, at least predominately synthetic polymers containing acrylic units
Patent #: 4330441
Issued on: 05/18/1982
Inventor: Bohmer , et al.

Rapid set lightweight cement product
Patent #: 4501830
Issued on: 02/26/1985
Inventor: Miller , et al.

Method of using thixotropic cements for combating lost circulation problems Patent #: 4515216
Issued on: 05/07/1985
Inventor: Childs , et al.

Inventors

Assignee

Redland Technology Limited

Application

No. 06/917862 filed on 10/14/1986

US Classes:

106/726, Cellulose or silica containing (e.g., sand, etc.)106/730, Starch, dextran, cellulose ether or gum524/4, Solid polymer or specified intermediate condensation product derived from at least one oxygen-containing reactant and which is devoid of a fused ring or bridged ring system524/5, Derived from carboxylic acid or derivative524/6, Derived from phenolic compound or aldehyde-containing reactant524/650Inorganic water settable material containing

Examiners

Primary: Dixon, William R. Jr.
Assistant: Brunsman, David

Attorney, Agent or Firm

Beveridge, DeGrandi & Weilacher

International Classes

C04B 16/00 (20060101)
C04B 16/06 (20060101)
C04B 28/00 (20060101)
C04B 28/02 (20060101)

Foreign Application Priority Data

1985-10-18 GB

Abstract

An uncured cementitious composition comprising in admixture:(a) at least one hydraulic cement;(b) at least one reactive water-soluble polymer which is capable of providing a viscous solution in water at low addition levels;(c) water in an amount of from 10 to 25 parts by weight of water per 100 parts by weight of the cement; and(d) a water soluble cross-linking agent capable of effecting chemical cross-links between molecules of the said polymer in the presence of the cement and water.