Patents by Inventor Kou-Chang Liu

Kou-Chang Liu has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 6136934
    Abstract: A process is described for making substantially homogeneous polymers of at least two monomers having substantially differing reactivity rates.
    Type: Grant
    Filed: December 28, 1994
    Date of Patent: October 24, 2000
    Assignee: ISP Investments Inc.
    Inventors: Yakir Reuven, Kou-Chang Liu
  • Patent number: 6110454
    Abstract: A process is described for making substantially homogeneous copolymers comprising 20-99% of vinyl pyrrolidone (VP) and 1-80% of N-3,3-dimethylaminopropyl methacrylamide, (DMAPMA), preferably 50-95% VP and 5-50% DMAPMA, and, most preferably, about 80:20, by weight, having a weight average molecular weight of about 200,000 to 1,500,000, as a clear, low viscosity aqueous solution of the homogeneous copolymer, at a 5-20% solids level, preferably about 10-15%, by weight of the solution, having a viscosity of about 5,000 to 80,000 cps, preferably about 10,000 to 70,000 cps. The solution obtained herein has lower viscosity and better clarity, and provides hair care products with enhanced curl retention (hold), when compared to non-homogeneous copolymers of the same composition, or related existing commercial products.
    Type: Grant
    Filed: May 30, 1996
    Date of Patent: August 29, 2000
    Assignee: ISP Investments Inc.
    Inventors: Kou-Chang Liu, Lowell R. Anderson, Eugene E. Hardy, Yakir Reuven
  • Patent number: 5997855
    Abstract: A multicomponent homogeneous polymer of (a) from about 30 to about 90 wt. % of a N-vinyl lactam, (b) from about 5 to about 30 wt. % of a quaternized and/or non-quaternized aminoalkylacrylic -ester and/or -amide, (c) from about 0.5 to about 30 wt. % of an unsaturated monomer selected from the group consisting of an acrylic ester or amide having a C.sub.4 to C.sub.22 alkyl group, a C.sub.4 to C.sub.22 .alpha.-olefin, a C.sub.4 to C.sub.22 vinyl ether (VE) and a vinyl ester of a C.sub.2 to C.sub.22 carboxylic acid and (d) from about 1 to about 30 wt. % of an unsubstituted acrylic or methacrylic acid and/or an unsubstituted amide of said acrylic or methacrylic acid and optionally, (e) up to 20 wt.
    Type: Grant
    Filed: January 28, 1998
    Date of Patent: December 7, 1999
    Assignee: ISP Investments Inc.
    Inventor: Kou-Chang Liu
  • Patent number: 5916544
    Abstract: A sunscreen concentrate in the form of a stable, uniform dispersion comprising, by weight:(a) about 30-65% of ultrafine titanium dioxide or zinc oxide, or mixtures thereof,(b) about 30-70% of an organic sunscreen agent, and(c) about 0.25-25% of a dispersing aid which is polyvinylpyrrolidone alkylated with a C.sub.4 -C.sub.36 alpha-olefin.
    Type: Grant
    Filed: November 12, 1997
    Date of Patent: June 29, 1999
    Assignee: ISP Investments Inc.
    Inventors: Kou-Chang Liu, Michael Helioff, Mark Rerek, Mary Davis, Lawrence J. Grenner, David E. Graham, Anja Waldorf-Geber, Renate Koppel
  • Patent number: 5844041
    Abstract: A process is described for increasing the viscosity and high humidity curl retention of aqueous solutions of homogeneous copolymers of 20-99% vinyl pyrrolidone (VP) and 1-80% N-3,3-dimethylamino-propyl methacrylamide (DMAPMA). The high viscosity solutions are particularly useful as the active component of hair care products.
    Type: Grant
    Filed: August 13, 1997
    Date of Patent: December 1, 1998
    Assignee: ISP Investments Inc.
    Inventors: Lowell Ray Anderson, Kou-Chang Liu, Hemant Parikh
  • Patent number: 5830964
    Abstract: This invention relates to substantially colorless and odorless vinyl lactam polymers containing less than 100 ppm residual vinyl pyrrolidone and less than 1000 ppm vinyl caprolactam monomers and to the process for producing said polymers in the above state of purity which comprises contacting a vinyl pyrrolidone and/or vinyl caprolactam polymer containing excessive residual monomer with between about 0.1 and about 9 wt. % of porous resin having a sulfonic and/or carboxylic functionality wherein said resin has a particle size between 5 and 500 mesh.
    Type: Grant
    Filed: December 18, 1997
    Date of Patent: November 3, 1998
    Assignee: ISP Investments Inc.
    Inventors: Kou-chang Liu, Lowell R. Anderson, Rajiv Ginde, Colleen M. Rocafort
  • Patent number: 5626836
    Abstract: Low VOC hair spray resin compositions containing homogeneous terpolymers of vinyl pyrrolidone, vinyl caprolactam and 3-(N-dimethylaminopropyl) methacrylamide are described. The hair spray compositions are made using a solution of the terpolymer which is clear and low in viscosity, and which provides a spray of relative small particle size. The hair spray compositions exhibit an effective high humidity curl retention property.
    Type: Grant
    Filed: December 28, 1994
    Date of Patent: May 6, 1997
    Assignee: ISP Investments Inc.
    Inventors: Kou-Chang Liu, Colleen M. Rocafort, Lowell R. Anderson, Yakir Reuven
  • Patent number: 5609865
    Abstract: Substantially homogeneous copolymers comprising 20-99% of vinyl pyrrolidone (VP) and 1-80% of N-3,3-dimethylaminopropyl methacrylamide, (DMAPMA), preferably 50-95% VP and 5-50% DMAPMA, and, most preferably, about 80:20, by weight, having a weight average molecular weight of about 200,000 to 1,500,000, as a clear, low viscosity aqueous solution of the homogeneous copolymer, at a 5-20% solids level, preferably about 10-15%, by weight of the solution, having a viscosity of about 5,000 to 80,000 cps, preferably about 10,000 to 70,000 cps. The solution obtained herein has lower viscosity and better clarity, and provides hair care products with enhanced curl retention (hold), when compared to non-homogeneous copolymers of the same composition, or related existing commercial products.
    Type: Grant
    Filed: December 28, 1994
    Date of Patent: March 11, 1997
    Assignee: ISP Investments Inc.
    Inventors: Kou-Chang Liu, Lowell R. Anderson, Eugene E. Hardy, Yakir Reuven
  • Patent number: 5603919
    Abstract: Low VOC hair spray fixative compositions containing a fixative which is a tetramer of vinyl pyrrolidone, vinyl caprolactam, 3-(N-dimethylaminopropyl) methacrylamide and a C.sub.8 -C.sub.18 alkyl acrylamide or acrylate, in predetermined compositional ranges of each monomer, and molecular weight, are described. The hair spray compositions herein are clear and low in viscosity, and form a spray of relatively small particle size which spreads evenly on the hair of the user as clear films which exhibit an effective high humidity curl retention property, good stiffness, and low tack and short drying times.
    Type: Grant
    Filed: January 5, 1995
    Date of Patent: February 18, 1997
    Assignee: ISP Investments Inc.
    Inventors: Kou-Chang Liu, Colleen M. Rocafort
  • Patent number: 5523369
    Abstract: A homogeneous polymerization process is described for making substantially homogeneous terpolymers of, by weight, 55-99%, preferably 65-95% of vinyl pyrrolidone; 0.5-49%, preferably 1-25% of a quaternary amino monomer, preferably 3-methacrylamidopropyl trimethylammonium chloride; and 0.5-49%, preferably 1-25%, of a hydrophobic monomer, preferably octadecyl methacrylate. The homogeneous terpolymer provides dual hair styling and conditioning functions in hair care applications.
    Type: Grant
    Filed: December 28, 1994
    Date of Patent: June 4, 1996
    Assignees: ISP Investments Inc., Helene Curtis, Inc.
    Inventors: Kou-Chang Liu, Robert B. Login, Yakir Reuven, Janice K. Bees
  • Patent number: 5492988
    Abstract: A homogeneous polymerization process is described for making substantially homogeneous terpolymers of, by weight, 55-99%, preferably 65-95% of vinyl pyrrolidone; 0.5-49%, preferably 1-25% of a quaternary amino monomer, preferably 3-methacrylamidopropyl trimethylammonium chloride; and 0.5-49%, preferably 1-25%, of a hydrophobic monomer, preferably octadecyl methacrylate. The homogeneous terpolymer provides dual hair styling and conditioning functions in hair care applications.
    Type: Grant
    Filed: December 28, 1994
    Date of Patent: February 20, 1996
    Assignee: ISP Investments Inc.
    Inventors: Kou-Chang Liu, Robert B. Login, Yakir Reuven
  • Patent number: 5215869
    Abstract: This invention relates to the preparation of a supported modulating film having a permanent yellow imaged layer of the homopolymer of 10,12-docosadiyndioic acid monomer; said monomer having the structure ##STR1## and to the use of said film as a blue light modulator in the production of master printing plates or printed circuit boards.
    Type: Grant
    Filed: April 2, 1992
    Date of Patent: June 1, 1993
    Assignee: ISP Investments Inc.
    Inventor: Kou-Chang Liu
  • Patent number: 5215870
    Abstract: This invention relates to the preparation of a supported modulating film having a permanent yellow imaged layer of the homopolymer of a crystalline diacetylene cinnamate monomer ##STR1## and to the use of said film as a light modulator in the production of master printing plates or printed circuit boards.
    Type: Grant
    Filed: May 6, 1992
    Date of Patent: June 1, 1993
    Assignee: ISP Investments Inc.
    Inventors: Kou-Chang Liu, David F. Lewis, John C. Hornby
  • Patent number: 5183946
    Abstract: The invention relates to a vinyloxy hydroxyalkyl cycloalkylene having the formulaHO(CH.sub.2).sub.x --A--(CH.sub.2).sub.x, OCH.dbd.CH.sub.2wherein x has a value of from 1 to 10; x' has a value of from 0 to 10 and A is a cycloalkylene group having from 3 to 8 carbon atoms in the ring and is optionally substituted with lower alkyl. The invention also relates to the method for synthesizing the above compounds.
    Type: Grant
    Filed: March 16, 1992
    Date of Patent: February 2, 1993
    Assignee: ISP Investments Inc.
    Inventors: Kou-Chang Liu, Paul D. Taylor
  • Patent number: 5158811
    Abstract: This invention relates to divinyl ether siloxanes having the formula ##STR1## wherein Y is alkylene or phenylene optionally substituted with fluorine,R is alkylene or alkylene phenylene,R.sub.1 and R.sub.2 are lower alkyl,A is --CH.sub.2 -- or >C(CH.sub.3).sub.2,Z is C.sub.2 to C.sub.3 alkylene,B is halo or lower alkyl,m has a value of from 1 to 10,n has a value of from 1 to 20,r has a value of from 0 to 20,t has a value of from 1 to 100 andv has a value of from 0 to 4.The invention also relates to the process of preparing the present divinyl ether siloxanes and to their use as coating materials.
    Type: Grant
    Filed: April 23, 1992
    Date of Patent: October 27, 1992
    Assignee: ISP Investments Inc.
    Inventor: Kou-Chang Liu
  • Patent number: 5158862
    Abstract: This invention relates to the preparation of a supported modulating film having a permanent orange yellow imaged layer of the homopolymer of crystralline 5,7-dodecadiyn-1,12-bis(isopropyl carbamate) monomer having the structure ##STR1## and to the use of said film as a blue light modulator in the production of master printing plates or printed circuit boards.
    Type: Grant
    Filed: February 3, 1992
    Date of Patent: October 27, 1992
    Assignee: ISP Investments Inc.
    Inventor: Kou-Chang Liu
  • Patent number: 5156897
    Abstract: This invention relates to an aromatic vinyl ether siloxane having the formula ##STR1## wherein A is --CH.sub.2 -- or >C(CH.sub.3).sub.2 ;m has a value of from 1 to 22;R.sub.1 and R.sub.2 are each selected from the group consisting of ##STR2## with the proviso that at least one of R.sub.1 and R.sub.2 is (a) and R.sub.2 can be a mixture of (a) and (b) when m is greater than one,R.sub.3 and R.sub.4 are lower alkyl,r has a value of from 0 to 20,R is alkylene or alkylene phenylene,B is C.sub.2 to C.sub.20 alkylene, arylene or a fluorinated derivative of these radicals,t has a value of from 1 to 100,Z is C.sub.2 to C.sub.3 alkylene andn has a value of from 1 to 10.
    Type: Grant
    Filed: April 23, 1992
    Date of Patent: October 20, 1992
    Assignee: ISP Investments Inc.
    Inventor: Kou-Chang Liu
  • Patent number: 5157094
    Abstract: This invention relates to an aromatic vinyl ether siloxane having the formula ##STR1## wherein A is --CH.sub.2 -- or >C(CH.sub.3).sub.2 ;m has a value of from 1 to 22;R.sub.1 and R.sub.2 are each selected from the group consisting of ##STR2## with the proviso that at least one of R.sub.1 and R.sub.2 is (a) and R.sub.2 can be a mixture of (a) and (b) when m is greater than one,R.sub.3 and R.sub.4 are lower alkyl,r has a value of from 0 to 20,R is alkylene or alkylene phenylene,B is C.sub.2 to C.sub.20 alkylene, arylene or a fluorinated derivative of these radicals,t has a value of from 1 to 100,Z is C.sub.2 to C.sub.3 alkylene andn has a value of from 1 to 10.
    Type: Grant
    Filed: August 9, 1990
    Date of Patent: October 20, 1992
    Assignee: ISP Investments Inc.
    Inventor: Kou-Chang Liu
  • Patent number: 5153106
    Abstract: The invention relates to a process for direct and permanent photopositive scribing on a thermochromic coating composition consisting essentially of certain thermosensitive aryl diacetylenes which contain a moiety selected from the group of sulfonyl, amino, urethanyl, carboxylate and nitro radicals, and a dye capable of absorbing radiation energy generated by a laser in a wavelength of from about 600 to about 1,500 nm and to the coating composition comprising said aryl diacetylene and energy absorbing dye.
    Type: Grant
    Filed: March 11, 1991
    Date of Patent: October 6, 1992
    Assignee: ISP Investments Inc.
    Inventor: Kou-Chang Liu
  • Patent number: 5153292
    Abstract: This invention relates to divinyl ether siloxanes having the formula ##STR1## wherein Y is alkylene or phenylene optionally substituted with fluorine,R is alkylene or alkylene phenylene,R.sub.1 and R.sub.2 are lower alkyl,A is --CH.sub.2 -- or ##STR2## Z is C.sub.2 and C.sub.3 alkylene, B is halo or lower alkyl,m has a value of from 1 to 10,n has a value of from 1 to 20,r has a value of from 0 to 20,t has a value of from 1 to 100 andv has a value of from 0 to 4.The invention also relates to the process of preparing the present divinyl ether siloxanes and to their use as coating materials.
    Type: Grant
    Filed: August 9, 1990
    Date of Patent: October 6, 1992
    Assignee: ISP Investments Inc.
    Inventor: Kou-Chang Liu