Patents by Inventor Rodney W. Parr

Rodney W. Parr 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).

  • Publication number: 20030150578
    Abstract: Provided herein are compositions useful for inhibiting the formation of gummy residues on equipment in processing operations which liberate tiny adhesive particles having a tendency to agglomerate into larger particles and/or films. The compositions comprise a complex or adduct formed from styrene/methacrylic acid copolymer and calcium ions. The compositions according to the invention may be added to a processing system at any point, either upstream or downstream from the location at which residues are formed. Compositions according to the invention may be applied by spray techniques.
    Type: Application
    Filed: February 13, 2003
    Publication date: August 14, 2003
    Applicant: Huntsman Petrochemical Corporation
    Inventors: Duy T. Nguyen, Rodney W. Parr
  • Publication number: 20020148576
    Abstract: Provided herein are compositions useful for inhibiting the formation of gummy residues on equipment in processing operations which liberate tiny adhesive particles having a tendency to agglomerate into larger particles and/or films. The compositions comprise a complex or adduct formed from styrene/methacrylic acid copolymer and calcium ions. The compositions according to the invention may be added to a processing system at any point, either upstream or downstream from the location at which residues are formed. Compositions according to the invention may be applied by spray techniques.
    Type: Application
    Filed: February 5, 2001
    Publication date: October 17, 2002
    Inventors: Duy T. Nguyen, Rodney W. Parr
  • Patent number: 5844115
    Abstract: Active hydrogen containing organic compounds, for example alcohols, thiols, phenols, thiophenols, carboxylic acids, amides and amines, are alkoxylated, for example, ethoxylated, using catalysts comprising a salt of a Group IIa or Group Ia element and an oxyacid of at least one element chosen from Group IVb, Group Vb or Group VIb, for example, lanthanum titanate, barium titanium, barium strontium titanate, yttrium titanate, lanthanum zirconate, barium zirconate, lanthanum hafnate, barium strontium titanate zirconate and neodymium titanate. The catalyst provide narrow distribution of alkoxylation species and efficient reaction rates.
    Type: Grant
    Filed: February 13, 1995
    Date of Patent: December 1, 1998
    Assignee: ICI Australia Operations Proprietary Limited
    Inventors: Keith Moody, Rodney W Parr, David Parris, Kenneth R Deutscher, Esennur E Tasdelen
  • Patent number: 4538000
    Abstract: There are disclosed non-ionic unsaturated chemical compounds having both hydrophilic and lipophilic components.The hydrophilic component comprises at least two ethylene oxide units and the lipophilic component has a molecular weight of 1000 maximum and comprises an entity selected from eugenol, pentaerythritol triallyl ether and trimethylolpropane diallyl ether.The compounds are useful, for example, as emulsion stabilizers.
    Type: Grant
    Filed: November 21, 1983
    Date of Patent: August 27, 1985
    Assignee: Dulux Australia Ltd.
    Inventor: Rodney W. Parr
  • Patent number: 4413073
    Abstract: This invention relates to the preparation of stable aqueous dispersions of particles of film-forming polymer, the particles comprising at least one pre-formed polymer and at least one polymer formed in situ ("multi-polymer particles").The inadequate stability exhibited by many previously known film-forming systems based on multi-polymer particles, especially in the presence of co-solvents, may be overcome by preparing the particles in the presence of a stabilizing compound which is an amphipathic compound with a hydrophilic-lipophilic balance (HLB) value of at least 8 and whose lipophilic portion comprises at least one ethylenic double bond.The dispersions of this invention are useful as the film-forming components of coating compositions.
    Type: Grant
    Filed: June 29, 1982
    Date of Patent: November 1, 1983
    Assignee: ICI Australia Limited
    Inventors: David V. Gibson, Rodney W. Parr, John E. Swalwell