Abstract: The invention relates to the modification of a curable phenolic resin system by the incorporation of alkylphenol, alkoxyphenol, arylphenol or aryloxyphenol. The resulting resin has reduced water soluble leachates which, in turn, improves the break time when the resin is used to coat proppants for treating subterranean formations.
Type:
Grant
Filed:
November 14, 1991
Date of Patent:
June 8, 1993
Assignee:
Borden, Inc.
Inventors:
Calvin R. Johnson, Kwok-tuen Tse, Charles J. Korpics
Abstract: The invention provides a compostable thermoplastic polymer composition comprising a thermoplastic polymer, a transition metal salt selected from cobalt, manganese, copper, cerium, vanadium and iron, and a fatty acid or ester having 10 to 22 carbon atoms providing unsaturated species and free acid. The composition will oxidatively degrade to an embrittled state within at least 14 days at 60.degree. C. and a relative humidity of at least eighty percent.
Type:
Grant
Filed:
December 12, 1991
Date of Patent:
June 1, 1993
Assignee:
Minnesota Mining and Manufacturing Company
Inventors:
Alan J. Sipinen, Jobst T. Jaeger, Denise R. Rutherford, Elizabeth C. Edblom
Abstract: The invention relates to rosin-based resin-fortified emulsion polymer compositions having improved properties which are useful in formulating printing inks. Additionally, the invention relates to the method of preparing these emulsion polymer compositions.
Abstract: A method for substantially minimizing the agglomeration of freshly manufactured polyolefin pellets, comprising adding an effective amount of oxidized high density polyethylene powder during the manufacturing process. The method results in the production of more commercially desirable non-agglomerated polyolefin pellets.
Abstract: Injectable implant compositions comprise a biocompatible ceramic matrix present in a fluid carrier, where the ceramic matrix comprises particles having a size distribution in the range from 50 .mu.m to 250 .mu.m. Optionally, the compositions may further comprise collagen, where the relative amounts of collagen and ceramic matrix at least partly determine the physical properties of implants formed by injecting the compositions. The fluid carrier is an aqueous buffered medium, typically including an organic polymer base material when there is no collagen present in the composition. The compositions are particularly suitable for repair and augmentation of soft and hard tissues by injection.
Type:
Grant
Filed:
July 27, 1992
Date of Patent:
April 20, 1993
Assignee:
Collagen Corporation
Inventors:
Donald G. Wallace, Hugh McMullin, George Chu
Abstract: Salts of lower alkyl vinyl ether/maleic anhydride are described as active components in dental adhesives. A process for the preparation of these salts is described.The salts are partially neutralized mixed salts of lower alkyl vinyl ether/maleic anhydride copolymers. The neutralization of the copolymer is effected with aluminum, and calcium and/or sodium.
Abstract: A phosphonate ester (vinyl phosphonic acid reacted with equimolar diol) will cure on command (e.g. exposure to light) in the presence of an initiator. By adding inert filler, poly(vinyl phosphonic acid), ion-leachable glass powder and water, a command-curable dental cement with glass ionomer characteristics is obtained.
Type:
Grant
Filed:
October 30, 1991
Date of Patent:
April 20, 1993
Assignee:
National Research Development Corporation
Abstract: An essentially solvent-free adhesive composition containingA) an aqueous acrylate latex andB) 30 to 150% by weight, based on the solids content of the acrylate latex A), of a mixture ofb1) 50 to 95% by weight, based on the mixture, of at least one tackifying resin andb2) 5 to 50% by weight, based on the mixture, of a compound of the formula IR.sup.1 --O--(X--O).sub.n --R.sup.2where X is alkylene of 2 to 4 carbons, n is an integer from 1 to 8 and R.sup.1 and R.sup.2 are each hydrogen or aryl or alkaryl of 6 to 12 carbon atoms, where R.sup.1 and R.sup.2 are not both hydrogen,is prepared as described and used as adhesive for floor coverings.
Type:
Grant
Filed:
December 3, 1991
Date of Patent:
March 23, 1993
Assignee:
BASF Aktiengesellschaft
Inventors:
Thomas Schwerzel, Peter Fickeisen, Hans J. Neumann
Abstract: An improved composite coating system for coating foam resin articles, including a formulation for a base coat together with a formulation for a top coat which bonds while to the surface of the base coat to form the composite. The base coat formulation is a water-based vinyl resin together with a slow evaporating coalescent and plasticizer. The top coat utilizes a solvent-based vinyl resin together with aromatic and aliphatic solvents and plasticizers. Erucic acid base monoamides are utilized for achieving desirable slip properties in the finished top coating. In order to achieve the desirable properties of the composite coatings, the latex resin-based materials are selected from those having a low glass transition temperature such as between -20.degree. C. and about 20.degree. C.
Abstract: Previous weather resistant cementitious compositions in which succinic acid derivatives were incorporated to improve weather resistance have been found to suffer from an undesirable decrease in compressive strength. In accordance with the invention, compressive strength is significantly increased without substantially reducing weather reistance by adding an antifoam agent to the mixture prior to setting into a solid.
Abstract: The invention provides an aqueous release agent for the production of polyurethane moldings, which in combination with a release surface contains one or more specific ethoxylated alcohols.
Type:
Grant
Filed:
June 24, 1991
Date of Patent:
January 5, 1993
Inventors:
Werner Herres, Thomas Galle, Siglinde Rupp
Abstract: Thermoformable composites comprised of polycarbonate/woven glass cloth and methods for their preparation are provided which have good flammability characteristics and physical properties and are suitable for use in aircraft interiors.
Abstract: A dispersion of reactive polymer particles obtained by polymerization of monomer in an organic liquid which dissolves the monomer but does not dissolve a polymer formed from the monomer, in the presence of a dispersion stabilizer composed of a high molecular weight polymer; characterized in that (i) said dispersion stabilizer is a high molecular weight polymer which is obtained by polymerization of an ethylenically unsaturated monomer and soluble in the above organic liquid and which contains a chemically reactive group (A); that (ii) said polymer particles are particles of a high molecular weight polymer which are obtained by polymerization of an ethylenically unsaturated monomer and contain a complementary chemically reactive group (B) capable of mutually reacting with the chemically reactive group (A); and that (iii) the chemically reactive group (A) and the chemically reactive group (B) are present stably in the dispersion.
Abstract: A coating of hydrophobic polymer is prepared by contacting a substrate with an aqueous media containing amphiphilic polymer and polymerizing polymerizable component to provide the hydrophobic polymer coating. The processes can be used to make stable dispersions of particles, such as pigments, for paint compositions.
Type:
Grant
Filed:
March 6, 1989
Date of Patent:
December 15, 1992
Assignee:
Union Carbide Chemicals & Plastics Technology Corporation
Inventors:
Kenneth L. Hoy, Charles W. Glancy, Jeffrey M. O. Lewis
Abstract: Provided is a process for producing molded articles having excellent flexural strength, flexibility and dimensional stability, which comprises autoclave-curing at not lower than 100.degree. C. an aqueous composition comprising a hydraulic material (A) and a polyvinyl alcohol (B) powder, said polyvinyl alcohol (B) powder being contained in an amount of 0.1 to 20% by weight based on the weight of said hydraulic material (A).Also provided are molded articles comprising a hydraulic material (A) and a polyvinyl alcohol (B), said polyvinyl alcohol (B) being contained in an amount of 0.1 to 20% by weight based on the weight of said hydraulic material (A), said molded article having a structure comprising said polyvinyl alcohol (B) having once dissolved and then solidified being dispersed therein in the form of islands. These molded articles have excellent flexural strength, flexibility and dimensional stability.
Type:
Grant
Filed:
December 6, 1990
Date of Patent:
November 17, 1992
Assignee:
Kuraray Co., Ltd.
Inventors:
Akio Mizobe, Kenji Saimen, Sotaro Itadani, Ken Yuki