1
David C Darwin, Ellis M Gartner, Byong Wa Chun, Hideo Koyata, Lawrence L Kuo: Cement and cement composition having improved rheological properties. W R Grace & Co Conn, Howard J Troffkin, February 28, 1995: US05393343 (91 worldwide citation)

An improved hydraulic cement and resultant hydraulic cement composition having an imidized acrylic polymer uniformly distributed therein.


2
Ahmad Arfaei, David C Darwin, Ellis M Gartner, Byong Wa Chun, Hideo Koyata, Lawrence L Kuo: Cement admixture product having improved rheological properties and process of forming same. W R Grace & Co Conn, Howard Troffkin, May 27, 1997: US05633298 (57 worldwide citation)

The present invention is directed to an imidized polycarboxylic acid polymer useful as a cement admixture, to improved cement compositions containing said polymer and to a process of forming the same.


3
David C Darwin, Ellis M Gartner, Byong Wa Chun, Hideo Koyata, Lawrence L Kuo: Cement and cement composition having improved rheological properties. W R Grace & Co Conn, Howard J Troffkin, December 10, 1996: US05583183 (23 worldwide citation)

An improved hydraulic cement and resultant hydraulic cement composition having an imidized acrylic polymer uniformly distributed therein.


4
Lawrence L Kuo, Roger Y Leung, Kenneth S Williams: Water-soluble cationic copolymers and their use as flocculants. W R Grace & Co Conn, Howard J Troffkin, June 25, 1996: US05529699 (14 worldwide citation)

A method of flocculating coagulated and/or finely divided suspended matter in aqueous systems comprising adding to the system from 0.005 to 1 weight percent based on the dry weight of the coagulated and/or finely suspended matter of at least one water soluble cationic polymer selected from a water s ...


5
Lawrence L Kuo, Roger Y Leung, Kenneth S Williams: Water-soluble cationic copolymers and their use as drainage retention aids in papermaking processes. W R Grace & Co Conn, Howard J Troffkin, December 5, 1995: US05473033 (12 worldwide citation)

A method of preparing paper or paper board product from an aqueous pulp suspension comprising adding to the suspension an effective amount of a drainage retention aid composition of a) microparticles and b) at least one water soluble cationic polymer selected from a water soluble cationic copolymer ...


6
Denise A Silva, Josephine Cheung, Paul Sandberg, Lawrence Roberts, Durga V Subramanian, John L Gallagher, Lawrence L Kuo: Suppression of antagonistic hydration reactions in blended cements. W R Grace & Co Conn, Craig K Leon, Stephan P Williams, August 27, 2013: US08518176 (7 worldwide citation)

Method for suppressing antagonistic hydration reactions in Portland fly ash cement involves the use of unponded fly ash that is pre-hydrated, preferably as an aqueous slurry wherein fly ash, preferably having an alkaline earth metal oxide of at least 10% by weight, is soaked, whereby the hydration r ...


7
Lawrence L Kuo: Allylamine copolymers having phosphonic, carboxylic or sulfonic groups and N-oxide derivatives thereof. BetzDearborn, Alexander D Ricci, Philip H Von Neida, May 13, 1997: US05629385 (5 worldwide citation)

This invention is directed to certain novel N-functionalized polyallylamines having recurring units represented by the formula: ##STR1## wherein A, B, C and D are independently selected from the group consisting of hydrogen, CH.sub.2 PO.sub.3 H.sub.2, (CH.sub.2).sub.n COOH, (CH.sub.2).sub.m SO.sub.3 ...


8
Lawrence L Kuo, Roger Y Leung, Kenneth S Williams: Method of producing water-soluble cationic copolymers. W R Grace & Co Conn, Howard J Troffkin, May 14, 1996: US05516852 (4 worldwide citation)

A method of preparing a high molecular weight water-soluble cationic copolymer by reacting in an aqueous solution at least one N-vinylamide and at least one cationic quaternary amine monomer in the presence of a free radical initiator and a salt of ethylenediamine tetraacetic acid and subjecting the ...


9
Lawrence L Kuo: Defoamers for hydratable cementitious compositions. W R Grace & Co Conn, Craig K Leon, Stephen P Williams, November 27, 2012: US08317918 (1 worldwide citation)

The present invention discloses additive compositions, cementitious compositions, and methods for controlling air in cementitious compositions, wherein a polyalkoxylated polyalkylene polyamine defoamer is deployed in combination with one or more air-entraining agents, such as higher alkanolamines, w ...


10
Lawrence L Kuo: Defoamers for hydratable cementitious compositions. W R Grace & Co Conn, Craig K Leon, Stephan P Williams, May 29, 2012: US08187376 (1 worldwide citation)

The present invention discloses additive compositions, cementitious compositions, and methods for controlling air in cementitious compositions, wherein a polyalkoxylated polyalkylene polyamine defoamer is deployed in combination with one or more air-entraining agents, such as higher alkanolamines, w ...