Patents Examined by Ralph H. Dean
  • Patent number: 5955536
    Abstract: There is disclosed a method for treating and protecting a substrate, said method comprising coating the surface of said substrate with a composition comprising a blend of(A) a polydimethylsiloxane polymer having a viscosity at C. of 5 to 100,000 cS; and(B) a polyisobutylene oligomer having a number average molecular weight of 200 to 550. The treatment imparts an aesthetically pleasing appearance to the surfaces of plastic, rubber or leather substrates whereby surface gloss is enhanced, but not excessively, as is the case for a comparable all-silicone treating agent.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: September 21, 1999
    Assignee: Dow Corning Corporation
    Inventors: Paul Joseph Popa, Linda Denise Kennan, Thomas Matthew Gentle, Dale Earl Hauenstein
  • Patent number: 5840814
    Abstract: The synthesis of star polymers having well-defined arms emanating from well-defined and readily controllable calix?n!arene (n=4 to 16) cores are described. The synthesis is particularly suitable for polyisobutylene and/or polysiloxane star polymers. The synthesis has been achieved using carbocationic and/or anionic ring-opening polymerization techniques to form polymer arms of desired molecular weights, then separately preparing the calixarene derivative core, and finally, linking the arms to the core by transesterification or hydrosilation.
    Type: Grant
    Filed: August 7, 1996
    Date of Patent: November 24, 1998
    Assignee: The University of Akron
    Inventors: Istvan J. Majoros, Timea M. Marsalko, Joseph P. Kennedy
  • Patent number: 5840802
    Abstract: Low temperature ductile and impact resistant compositions are provided which comprise a polycarbonate resin and a dual graft multi-stage polyorganosiloxane/polyvinyl-based graft polymer composition. Also provided are thermally stabilized multi-stage polyorganosiloxane/polyvinyl-based graft polymers which have improved color-imparting and impact resistance-imparting properties and thermoplastic compositions containing the same.
    Type: Grant
    Filed: October 11, 1991
    Date of Patent: November 24, 1998
    Assignee: General Electric Company
    Inventors: James Louis DeRudder, I-Chung Wayne Wang
  • Patent number: 5837758
    Abstract: Compositions are provided which comprise a poly(phenylene ether) resin, a poly(arylene sulfide) resin and an ortho ester compound. The compositions can further comprise compatibilizing agents and reinforcing fillers to provide compositions that exhibit low flash molding characteristics. Articles molded from these compositions are useful in the electrical connector industry.
    Type: Grant
    Filed: July 25, 1996
    Date of Patent: November 17, 1998
    Assignee: General Electric Company
    Inventors: Sterling Bruce Brown, Chorng-Fure Robin Hwang, Steven Thomas Rice, James Joseph Scobbo, Jr., John Bennie Yates, III, Farid F. Khouri
  • Patent number: 5814673
    Abstract: A method of making polymeric particulates wherein polymeric scrap material, virgin polymeric material and mixtures thereof are supplied to intermeshing extruder screws which are rotated to transport the polymeric material along their length and subject the polymeric material to solid state shear pulverization and in-situ polymer compatibilization, if two or more incompatible polymers are present. Uniform pulverized particulates are produced without addition of a compatibilizing agent. The pulverized particulates are directly melt processable (as powder feedstock) and surprisingly yield a substantially homogeneous light color product.
    Type: Grant
    Filed: April 26, 1996
    Date of Patent: September 29, 1998
    Assignee: Northwestern University
    Inventor: Klementina Khait
  • Patent number: 5804620
    Abstract: An embrittlement-resistant polymer composition, including: (a) a visbroken polymer composition comprising a crystalline, random copolymer of propylene and either ethylene or C.sub.4 -C.sub.10 1-olefins, and (b) an amount of polymethyl propyl 3-oxy-?4-(2,2,6,6-tetramethyl)piperidinyl! siloxane which is effective to improve the radiation resistance of the composition. Optional components include an acid neutralizing agent, and a sorbitol-based clarifier compound. The composition may be used to manufacture medical articles and food packaging material which must be sterilized, either by irradiation or by autoclaving.
    Type: Grant
    Filed: June 18, 1996
    Date of Patent: September 8, 1998
    Assignee: Montell North America Inc.
    Inventor: Stephen E. Amos
  • Patent number: 5783302
    Abstract: TPE's which comprise A blocks or B blocks or both A blocks and B blocks, which are crystalline and in which at least a part of the crystallinity result from the presence of crystallizable side chains. Such crystalline blocks are referred to as SCC blocks. TPE's containing SCC A blocks are novel and as such form part of the present invention. The invention also includes processes, compositions, shaped articles and assemblies which make use of TPE's containing SCC A blocks.
    Type: Grant
    Filed: May 22, 1995
    Date of Patent: July 21, 1998
    Assignee: Landec Corporation
    Inventors: Steven P. Bitler, Raymond Clarke, David A. Kemp, Ray F. Stewart, Valentine Y. Yoon, Robert G. Freelin
  • Patent number: 5783609
    Abstract: A process which comprises reacting a high molecular weight polyorganosiloxane or a composition containing the same with an alkoxysilane and/or a partially hydrolyzed condensate thereof at a temperature of lower than C. in the presence of an alcoholate compound and recovering the resulting organoalkoxysilane and, in addition thereto, at least one of a distillable polyorganosiloxane low molecular weight compound, a non-volatile liquid polyorganosiloxane and a silica; and a process which comprises reacting a high molecular weight polyorganosiloxane or a composition containing the same with an alcoholate compound at a temperature of to C. in an anhydrous state and recovering the resulting distillable polyorganosiloxane low molecular weight compound and, in addition thereto, at least one of an organoalkoxysilane and a non-volatile liquid polyorganosiloxane.
    Type: Grant
    Filed: June 27, 1996
    Date of Patent: July 21, 1998
    Assignees: Tama Chemicals Co., Ltd., Toshiba Silicone Co., Ltd.
    Inventors: Tsurahide Cho, Yoshiro Ohta, Toshitsura Cho, Tohru Yamashita, Nobuaki Ohkawa, Makoto Nishida
  • Patent number: 5770673
    Abstract: The present invention relates to non-sagging, light stable polyurethane compositions. These non-sagging, light stable polyurethane compositions are the reaction product of a liquid hexamethylene diisocyanate adduct with a mixture of an organic compound containing hydroxyl groups, an aliphatic and/or alicyclic diamine, and an alkanolamine. It also relates to a process for producing these non-sagging, light stable compositions, and their use as seam sealants.
    Type: Grant
    Filed: April 10, 1996
    Date of Patent: June 23, 1998
    Assignee: Bayer Corporation
    Inventors: Peter H. Markusch, Robert L. Cline, A. M. Sarpeshkar
  • Patent number: 5770685
    Abstract: The invention concerns the use of triazene or/and pentazadiene polymers as photoresists and in particular as positive photoresists in order to cover biochemical reagents. In addition the invention concerns a new process for the production of triazene or/and pentazadiene polymers.
    Type: Grant
    Filed: February 26, 1996
    Date of Patent: June 23, 1998
    Assignee: Boehringer Mannheim GmbH
    Inventors: Jurgen Stebani, Oskar Nuyken, Peter Sluka, Peter Finckh
  • Patent number: 5753737
    Abstract: A coating composition containing(A) a silyl group-containing vinyl polymer which has on the polymer chain ends or side chain thereof at least one silicon atom, to which a hydrolyzable group is linked, per polymer molecule,(B) a reaction product of an aminosilane compound with an epoxy compound(C) a hydrolyzable ester compound and(D) an inorganic pigment.The coating composition of the present invention has excellent film properties such as appearance, moisture resistance and grindability and is suitable for use as an undercoating and a primer coating.
    Type: Grant
    Filed: December 9, 1996
    Date of Patent: May 19, 1998
    Assignee: Kanegafuchi Kagaku Kogyo Kabushiki Kaisha
    Inventors: Shoichi Matsumura, Toshiro Nanbu, Hisao Furukawa, Jo Kawamura, Hirotoshi Kawaguchi
  • Patent number: 5747588
    Abstract: Thermoplastic urethane elastomeric alloys are obtained by melt compounding at least one first component that is a polyurethane elastomer having at least one plasticizer reacted therein, this first component being formed by heating a reaction mixture comprising at least one isocyanate having a functionality of less than about 2.2, at least one long chain polyol, at least one chain extender and at least one plasticizer in specified amounts at a temperature of at least about F. ( C.), with at least one second component that is another thermoplastic elastomer not within the definition of the first component.
    Type: Grant
    Filed: January 24, 1996
    Date of Patent: May 5, 1998
    Assignee: REFAC International, Ltd.
    Inventor: William H. Mann
  • Patent number: 5744548
    Abstract: A melt-extrudable thermoplastic polypropylene composition having a melt flow rate in a range of from about 18 to about 30 g/10 minutes at a temperature of C. and a load of 2.16 kg, a polydispersity less than 4, and a Z-average molecular weight greater than 300,000 as determined by differential refractometry. The composition may include a first thermoplastic polypropylene having a melt flow rate lower than 18 g/10 minutes at a temperature of C. and a load of 2.16 kg and a second thermoplastic polypropylene having a melt flow rate higher than 18 g/10 minutes at a temperature of C. and a load of 2.16 kg. The weight ratio of the first polypropylene to the second polypropylene is in a range of from about 90:10 to about 10:90. The composition may include from about 0.1 to about 1 percent by weight, based on the weight of the first and second thermoplastic polypropylenes, of a defined alkyl-substituted polysiloxane.
    Type: Grant
    Filed: October 30, 1996
    Date of Patent: April 28, 1998
    Assignee: Kimberly-Clark Worldwide, Inc.
    Inventors: Ronald Sinclair Nohr, John Gavin MacDonald, Peter Michelovich Kobylivker
  • Patent number: 5744530
    Abstract: A thermoplastic granule containing a high proportion of a particulate carbonate filler in a thermoplastic binder, for blending with an end product thermoplastic in which the carbonate filler is to be dispersed. The granule comprises at least 85% by weight of a particulate carbonate which is coated with one or more fatty acids having a carbon chain length of from 12 to 20 carbon atoms. The balance of the granule by weight comprises a thermoplastic polymeric binder which is solid at ambient temperature and is compatible with the end product thermoplastic in which the carbonate filler is to be dispersed. The polymeric binder is an amorphous polyolefins and/or a highly branched polyethylene wax. The PSD of the carbonate is selected to maximize packing.
    Type: Grant
    Filed: April 25, 1996
    Date of Patent: April 28, 1998
    Assignee: ECC International Inc.
    Inventor: David A. Skelhorn
  • Patent number: 5744203
    Abstract: An alignment layer for liquid crystals is disclosed. The liquid crystal alignment layer of the present invention is excellent in adhesion to the glass substrate, has a high liquid crystal alignment angle (pretilt angle) and generates a high pretilt angle with less dependence on the type of rubbing treatment methods and processing conditions such as heating temperature.
    Type: Grant
    Filed: October 18, 1995
    Date of Patent: April 28, 1998
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Takamasa Harada, Fumie Nozawa, Masami Ubukata, Haruhiko Itoh
  • Patent number: 5741842
    Abstract: A thermoplastic moulding composition containing at least one sinterable ceramic or metal powder and a mixture of thermoplastic binders, wherein one of the binders is a silicone resin and the second binder is an organic resin. The silicone resin has the a softening point of to C. and an average formula of:R.sub.a.sup.1 Si (OH).sub.b (OR.sup.2).sub.c O.sub.(4-a-b-c)/2whereina is in the range of 0.95 to 1.2c is in the range of 0 to 0.2the sum of a+b+c is 1.05 to 1.5the sum b+c is at most 0.3R.sup.1 denotes methyl andR.sup.2 denotes one or more of C.sub.1 -C.sub.18 alkyl radicals.
    Type: Grant
    Filed: February 16, 1996
    Date of Patent: April 21, 1998
    Assignee: Bayer Aktiengesellschaft
    Inventors: John Huggins, Gebhard Wagner, Ottfried Schlak
  • Patent number: 5741858
    Abstract: Molded articles of silane-crosslinked blends comprising a polyolefin elastomer and a crystalline polyolefin polymer exhibit desirable tensile strength and/or compression set properties, and are prepared by (i) blending a low density polyolefin elastomer with a crystalline polyolefin polymer, (ii) grafting the blend with a silane crosslinker, (iii) shaping the silane-grafted blend into the molded article, and (iv) curing the shaped, silane-grafted blend with water, preferably in the presence of a cure catalyst.
    Type: Grant
    Filed: May 31, 1996
    Date of Patent: April 21, 1998
    Assignee: The Dow Chemical Company
    Inventors: Jeffery E. Brann, Morgan M. Hughes, Stephen H. Cree, John Penfold
  • Patent number: 5741841
    Abstract: There is disclosed a coating composition including water, a solvent, a grafted elastomer composed of a polyorganosiloxane bonded to a fluoroelastomer, and a liquid which forms an azeotropic mixture with the water, wherein the azeotropic mixture of the water and the liquid restrains a viscosity increase in the coating composition over time.
    Type: Grant
    Filed: April 25, 1996
    Date of Patent: April 21, 1998
    Assignee: Xerox Corporation
    Inventors: Santokh S. Badesha, George J. Heeks, Arnold W. Henry, Biritawit Asfaw, Marko D. Saban, John Abate, Richard L. Carlston, Nam S. Ro
  • Patent number: 5739245
    Abstract: Plastics with at least one polyaddition product which contains silane, ether, urethane and optionally urea groups and has the following features: a content of terminally located alkoxysilyl groups of the formula --NR--(CH.sub.2).sub.m --SiR.sup.1 R.sup.2 R.sup.3, in which m is the number 3, R is hydrogen or a group of the formula --(CH.sub.2).sub.m --SiR.sup.1 R.sup.2 R.sup.3 and at least one of the groups R.sup.1, R.sup.2 and R.sup.3 is a group of the formula --(O--C.sub.p H.sub.2p).sub.q --O--A--R.sup.4, in which p is the number 3, q is a number in the range from 1 to 100 and A is a single bond and R.sup.4 is an organic radical defined in more detail; and the remaining groups R.sup.1, R.sup.2 and R.sup.3 are methyl, ethyl or C.sub.1 - to C.sub.4 -alkoxy, the plastics furthermore comprising at least one catalyst for condensation of the silane groups, are suitable as impression, duplicating and modelling compositions, in particular for dental purposes.
    Type: Grant
    Filed: November 13, 1995
    Date of Patent: April 14, 1998
    Assignee: Ernst Muhlbauer KG
    Inventors: Dierk Lubbers, Wolfgang Muhlbauer
  • Patent number: 5739199
    Abstract: Cross-liked resins exhibiting a high level of optical transparency and little variation of refractive index with temperature are prepared using mixtures of two organosiloxane resins in combination with a reinforcing silica filler. The types and relative concentrations of hydrocarbon radicals in the resins are within specified limits to obtain the required optical properties and each resin contains groups that react with groups on the other resin to form a crosslinked network.
    Type: Grant
    Filed: September 26, 1996
    Date of Patent: April 14, 1998
    Assignee: Dow Corning Asia, Ltd.
    Inventors: Katsuya Eguchi, Nobuo Kushibiki, Toshio Suzuki