Patents by Inventor Jui-Chang Chuang

Jui-Chang Chuang 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: 5206322
    Abstract: Crosslinkable, functional polymers of vinylpyrrolidone and aminoalkyl acrylamides are provided herein. Such polymers are readily crosslinked with a crosslinking agent, e.g. a multi-aldehyde, such as a di-, tri- or tetra- aldehyde, preferably, glutaric dialdehyde, to form an aqueous gel of predetermined viscosity suitable for making hydrogels, adhesives and coatings.
    Type: Grant
    Filed: May 26, 1992
    Date of Patent: April 27, 1993
    Assignee: ISP Investments Inc.
    Inventors: Robert B. Login, Jenn S. Shih, Jui-Chang Chuang
  • Patent number: 5206316
    Abstract: An emulsifier for an inverse emulsion polymerization to be produce a water-soluble polymer composed of a mixture of a non-ionic oil-soluble surfactant and an N-alkyl lactam or polymer of a N-vinyl lactam. The emulsifier is extremely useful in polymerizations wherein a water-in-oil polymeric product is obtained since the product is easily inverted to a stable oil-in-water emulsion. Methods for polymerization processes using the inventive emulsifier as well as emulsions obtained therefrom are also disclosed.
    Type: Grant
    Filed: September 16, 1991
    Date of Patent: April 27, 1993
    Assignee: ISP Investments Inc.
    Inventor: Jui-Chang Chuang
  • Patent number: 5196495
    Abstract: A hair spray fixative resin comprises a vinyl acetate/alkyl maleate half ester/N-substituted acrylamide terpolymer in a molar ratio of about 1.0 to 0.6-0.8 to 0.08-0.12, which is preferably produced by a suspension or solution polymerization process. Utilizing N-substituted acrylamides in place of isoborneol methacrylates in the terpolymer provides superior holding power over conventional hair fixative resins, at lower cost.
    Type: Grant
    Filed: January 25, 1991
    Date of Patent: March 23, 1993
    Assignee: ISP Investments Inc.
    Inventors: Jui-Chang Chuang, Edward W. Walls, Jr., Stephen C. Johnson
  • Patent number: 5194546
    Abstract: What is provided herein are copolymers of a vinyl lactam and a hydroxy or amino alkene monomers, which contain a hydroxy or amino functionality therein. These copolymers are prepared by reaction between a vinyl lactam, e.g. vinylpyrrolidone (VP) or vinyl caprolactam (VCL), a functional polymerizable monomer, e.g. .omega.-amino-1-alkene (AA) or .omega.-hydroxy-1-alkene (HA), in water solution in the presence of a free radical initiator under predetermined reaction conditions.
    Type: Grant
    Filed: May 6, 1992
    Date of Patent: March 16, 1993
    Assignee: ISP Investments Inc.
    Inventors: Robert B. Login, Jenn S. Shih, Jui-Chang Chuang
  • Patent number: 5162417
    Abstract: What is provided herein is a gelled acidizer composition which comprises an aqueous acid solution and a gelling agent therein which is a strongly swellable, moderately crosslinked polyvinylpyrrolidone polymers in the form of fine, white powders characterized by (a) an aqueous swelling parameter defined by its gel volume of about 15 to 150 ml/g of polymer and (b) a Brookfield viscosity in 5% aqueous solution of at least about 10,000 cps.
    Type: Grant
    Filed: April 1, 1991
    Date of Patent: November 10, 1992
    Assignee: ISP Investments Inc.
    Inventors: Jui-Chang Chuang, Jenn S. Shih, Joseph Niu
  • Patent number: 5139770
    Abstract: What is provided herein are cosmetic compositions for the care of hair and skin containing about 0.2 to 10% by wt. of a strongly swellable, moderately crosslinked polyvinylpyrrolidone polymers in the form of fine, white powders characterized by (a) an aqueous swelling parameter defined by its gel volume of about 15 to 150 ml/g, (b) a Brookfield viscosity in 5% aqueous solution of at least about 10,000 cps, and (c) being prepared directly by a precipitation polymerization process in an organic solvent, in the presence of about 0.2 to 1% by weight of vinylpyrrolidone of a multifunctional crosslinking agent, preferably about 0.25 to 0.6%, and optimally, about 0.35 to 0.6%.
    Type: Grant
    Filed: December 17, 1990
    Date of Patent: August 18, 1992
    Assignee: ISP Investments Inc.
    Inventors: Jenn S. Shih, Jui-Chang Chuang, Terry E. Smith, Carmen D. Bires, Michael W. Helioff, Robert B. Login
  • Patent number: 5073614
    Abstract: What is provided herein are strongly swellable, moderately crosslinked polyvinylpyrrolidone polymers in the form of fine, white powders characterized by (a) an aqueous swelling parameter defined by its gel volume of about 15 to 150 ml/g, (b) a Brookfield viscosity in 5% aqueous solution of at least about 10,000 cps, and (c) being prepared directly by a precipitation polymerization process in an organic solvent, in the presence of about 0.2 to 1% by weight of vinylpyrrolidone of a multifunctional crosslinking agent, preferably about 0.25 to 0.6%, and optimally, about 0.35 to 0.6%.
    Type: Grant
    Filed: October 18, 1990
    Date of Patent: December 17, 1991
    Assignee: ISP Investments Inc.
    Inventors: Jenn S. Shih, Terry E. Smith, Jui-Chang Chuang
  • Patent number: 4961921
    Abstract: Non-aerosol pump hair spray compositions herein are applied as a fine spray mist, without nozzle clogging, and dried rapidly, to provide superior hair holding power. The compositions includes a hair fixative resin which is a terpolymer of a vinyl ester, an alkyl maleate half ester, and an acrylate ester of a saturated, hydroxylated bicyclic hydrocarbon, in an amount between 6 and 20% solids, and at a relative viscosity of from 1.10 to below 1.30.
    Type: Grant
    Filed: April 21, 1989
    Date of Patent: October 9, 1990
    Assignee: GAF Chemicals Corporation
    Inventors: Jui-Chang Chuang, Edward Walls, Jr., Stephen C. Johnson
  • Patent number: 4954336
    Abstract: Non-aerosol pump hair spray compositions herein are applied as a fine spray mist, without nozzle clogging, and dried rapidly, to provide superior hair holding power. The compositions includes a hair fixative resin which is a copolymer of maleic anhydride and an alkyl vinyl ether, and the ethyl and butyl half-esters thereof, in an amount of between 6 and 20% solids. In suitable embodiments of the invention, the resin is the C.sub.2 -C.sub.4 alkyl half-ester of maleic anhydride and C.sub.1 -C.sub.5 alkyl vinyl ether having a relative viscosity of about 1.20 to 1.35 (1% in ethanol).
    Type: Grant
    Filed: May 22, 1989
    Date of Patent: September 4, 1990
    Assignee: GAF Chemicals Corporation
    Inventors: Jui-Chang Chuang, Edward Walls, Jr., Stephen C. Johnson, Mohammed Tazi
  • Patent number: 4831097
    Abstract: This invention relates to water soluble heterocyclic cationic graft polymers of cellulose containing units of the structure ##STR1## wherein R is the residue of a cellulosic polymer containing hydroxyl groups; R.sub.1 is hydrogen or methyl; R.sub.2.sup.+ is a quaternized amino amide, a quaternized amino ester or a quaternized 5 or 6 membered heterocyclic ring having up to 2 nitrogen atoms in the ring structure; R.sub.3 is a C.sub.3 to C.sub.8 alkylene group which is optionally substituted with methyl; R.sub.4 is hydrogen or hydroxy; x is an integer having a value of from 1 to 1000 and X is a halide anion.
    Type: Grant
    Filed: March 21, 1988
    Date of Patent: May 16, 1989
    Assignee: GAF Corporation
    Inventors: Jui-Chang Chuang, Ian W. Cottrell, Stephen C. Johnson
  • Patent number: 4689379
    Abstract: An improved hair spray resin comprising microspheres of vinyl acetate/mono-n-C.sub.4 -C.sub.5 alkyl maleate/ an isobornyl acrylate terpolymer in a molar ratio of about 1:0.35-1:0.05-0.25 and a one-step suspension polymerization process for the preparation of said resin in yields above 85%.
    Type: Grant
    Filed: January 23, 1987
    Date of Patent: August 25, 1987
    Assignee: GAF Corporation
    Inventor: Jui-Chang Chuang
  • Patent number: 4145221
    Abstract: Physical and photographic characteristics of silver halide emulsions containing salts of multivalent metals are improved by adding synthetic water-insoluble terpolymers of acrylic esters, glycidyl acrylates and acrylamides as emulsion additives. The crosslinkable terpolymers are highly compatible with silver halide emulsions containing multivalent metal salts when an acrylamide is a polymer component at less than 15 wt% and an anionic sulfate surfactant of the formula ##STR1## where R.sub.5 is a straight or branch-chain alkyl group of C.sub.4 -C.sub.12, R.sub.6 is a straight of branch-chain alkyl group of C.sub.8 -C.sub.20, n is an integer of 8 to 40, and M.sup.+ is an ammonium ion or, a monovalent metal ion such as potassium, sodium or cesium, is the dispersing agent during emulsion polymerization.
    Type: Grant
    Filed: November 8, 1977
    Date of Patent: March 20, 1979
    Assignee: GAF Corporation
    Inventors: Jui-Chang Chuang, Donald E. Trucker