Abstract: There is provided a production method for a water-absorbing resin for stably and continuously producing the water-absorbing resin with industrially high property, in particular, the water-absorbing resin with high liquid permeation. A method of the present invention relates to a production method for a water-absorbing resin including: a polymerization step of an aqueous solution of an unsaturated monomer; a drying step of the resultant hydrogel polymer; and a surface cross-linking step after drying; characterized by including a pneumatic transportation step for pneumatic transporting the water-absorbing resin powder substance in a pipeline with a surface roughness (Rz) of the inner surface of equal to or smaller than 800 nm, by using gas with a dew point of ?5° C. to ?100° C.
Type:
Grant
Filed:
March 26, 2009
Date of Patent:
April 2, 2013
Assignee:
Nippon Shokubai Co., Ltd.
Inventors:
Koji Matsumoto, Kozo Nogi, Kunihiko Ishizaki
Abstract: A nitrile group-containing highly saturated copolymer rubber having an iodine value of 80 or less and containing a caprate in 0.01 to 0.4 wt %. Preferably, the caprate is an alkaline earth metal caprate or Group XIII metal caprate. According to present invention, it is possible to provide a nitrile group-containing highly saturated copolymer rubber improved in mold fouling resistance while maintaining good normal state physical properties and heat resistance when being made into a cross-linked product.
Abstract: A method for producing a modified conjugated diene polymer includes a step (A) carrying out a primary modification reaction that reacts a heterocumulene compound having two or more specific functional groups with a conjugated diene polymer having a vinyl content of below 10% and a cis-1,4-bond content of 75% or more and possessing an active end to obtain a primary-modified conjugated diene polymer, and a step (B) carrying out a secondary modification reaction that reacts an active hydrogen-containing compound that includes one or more functional groups selected from the group consisting of an amino group, an imino group, a mercapto group, and a hydroxyl group with the primary-modified conjugated diene polymer to obtain a secondary-modified conjugated diene polymer. The method can produce a modified conjugated diene polymer that exhibits low heat build-up (low fuel consumption) and excellent wear resistance.
Abstract: A process for continuous thermal postcrosslinking of water-absorbing polymer particles, wherein the postcrosslinker is applied to the water-absorbing polymer particles by means of suitable nozzles and the nozzles are exchanged or cleaned via the interior of a glovebox adjoining the plant section comprising the nozzle.
Type:
Grant
Filed:
June 10, 2009
Date of Patent:
March 12, 2013
Assignee:
BASF SE
Inventors:
Oskar Stephan, Karl J. Possemiers, Ann Becker, Leo Van Miert, Ronny De Kaey
Abstract: The present invention relates to a novel multi functional additive grafted rubber. More particularly the present invention relates to novel grades of rubber and in particular to chemically grafted with cardanol (meta-penta decenyl phenol) and/or its derivatives. Importantly the rubber grades of the invention involve chemically anchored/grafted selective meta alkenyl phenol and/or its derivatives in the backbone of natural or synthetic rubber. Importantly, such rubber variant of the invention have high plasticity, lower Mooney and melt viscosities, better cure properties as compared to conventional virgin natural rubber or natural rubber plasticized with aromatic process oils.
Type:
Grant
Filed:
November 22, 2005
Date of Patent:
March 5, 2013
Assignee:
Council of Scientific and Industrial Research
Abstract: The present invention provides a modified diene rubber which can be produced economically and improve low-loss properties and wear resistance of a rubber composition made therefrom, as compared with the conventional modified diene rubber. The present invention further provides: a method of producing the modified diene rubber; a rubber composition using the modified diene rubber; and a tire using the rubber composition. Specifically, the present invention provides: a modified diene rubber, produced by first oxidizing diene rubber latex and then adding a polar group-including hydrazide compound to a terminal end of a molecular chain of the diene rubber; a rubber composition, comprising the modified diene rubber; and a tire, comprising a tire member made of the rubber composition.
Abstract: An adhesive blend is described that can include a semi-crystalline copolymer of propylene and at least one comonomer selected from the group consisting of ethylene and at least one C4 to C20 ?-olefin, the copolymer having a weight average molecular weight (Mw) from about 15,000 to about 200,000; an melt index (MI) from about 7 dg/min to about 3000 dg/min as measured by ASTM D 1238 (B), and a (Mw/Mn) of approximately 2. Various production processes are also described. Also described are adhesive compositions and methods for making adhesive compositions having polymers or polymer blends with melt flow rates (MFRS) equal to and above 250 dg/min. at 230°C. Certain specific embodiments of the invention involve the use of a free radical initiator, e.g., a peroxide.
Type:
Grant
Filed:
February 24, 2009
Date of Patent:
February 26, 2013
Assignee:
Exxonmobil Chemical Patents Inc.
Inventors:
Kenneth Lewtas, Sudhin Datta, Charles Cozewith, Bruce A. Harrington, David J. Lohse, Olivier J. F. Georjon, Anthony G. Karandinos, Keith A. Nelson, Jean M. Tancrede
Abstract: One aspect of the invention relates to a transparent rubber-modified styrenic resin composition. The resin composition comprises about 5 to about 30 parts by weight of a styrene-butadiene rubbery copolymer; and about 0 to about 15 parts by weight of a matrix resin comprising about 20 to about 40 parts by weight of styrenic monomer, about 30 to about 60 parts by weight of unsaturated carboxylic acid alkyl ester monomer and about 0 to about 15 parts by weight of vinyl cyanide monomer; wherein the difference between the refractive index of the rubbery copolymer and the matrix resin is about 0.005 or less and the transparent rubber-modified styrenic resin composition has a haze of about 5% or less as measured by a Nippon Denshoku Haze meter using a 3 mm thick test sample.
Type:
Grant
Filed:
January 27, 2009
Date of Patent:
February 19, 2013
Assignee:
Cheil Industries Inc.
Inventors:
Byeong Do Lee, Young Sub Jin, Hwan Seok Park, Jae Keun Hong
Abstract: In a method for making sulfurized polyacrylonitrile, polyacrylonitrile, a first solvent, a catalyst, and sulfur or sodium thiosulfate are provided. The polyacrylonitrile is dissolved in the first solvent to form a polyacrylonitrile solution. The catalyst is uniformly dispersed in the polyacrylonitrile solution. The polyacrylonitrile solution with the catalyst is heated to induce a cyclizing reaction of the polyacrylonitrile, thereby forming a first conjugated polymer solution with a conjugated polymer. The sulfur or sodium thiosulfate is uniformly mixed with the conjugated polymer to form a mixture. The mixture is heated to form sulfurized polyacrylonitrile.
Type:
Grant
Filed:
March 18, 2011
Date of Patent:
February 12, 2013
Assignees:
Tsinghua University, Hon Hai Precision Industry Co., Ltd.
Inventors:
Xiang-Ming He, Li Wang, Wei-Hua Pu, Wen-Ting Sun, Jian-Jun Li
Abstract: Compounds or polymers that contain carbon-carbon unsaturation are brominated using a quaternary phosphonium tribromide as the brominating agent. The bromination process proceeds easily under mild conditions. The process can be highly selective. When the substrate is a butadiene polymer or copolymer, the brominated product tends to have excellent thermal stability.
Abstract: The invention pertains to a peroxide composition comprising, based on the total weight of the composition: a) 10-90 wt % of an organic peroxide; b) 90-10 wt % of an organic solvent in which the organic peroxide does not dissolve; and c) optionally additives; wherein the water content is less than 20 wt %.
Type:
Grant
Filed:
April 10, 2008
Date of Patent:
February 5, 2013
Assignee:
Akzo Nobel N.V.
Inventors:
Johannes Martinus Gerardus Maria Reijnders, Frederik Willem Karel Koers
Abstract: The invention provides a rubber composition for golf balls which includes (A) a base rubber containing a polybutadiene having a cis-1,4 bond content of at least 60 wt %, (B) an unsaturated carboxylic acid and/or a metal salt thereof, and (C) an anthranilic acid derivative of the general formula wherein R1 and R2 are each independently a hydrogen atom or a hydrocarbon group of 1 to 20 carbons, m is an integer from 1 to 4, and n is an integer from 1 to 3, with the proviso that if m and/or n is 2 or more, each occurrence of R1 and R2 may be the same or different. The golf ball rubber composition of the invention enables a high-quality molded and crosslinked product having a suitable hardness and a high resilience to be obtained.
Abstract: A method for copolymerizing alkenyl aromatic monomer and conjugated diene in the gas phase. Other embodiments include methods for forming anionic gas-phase polymerization using a solid-supported anionic polymerization catalyst.
Abstract: Disclosed herein is a non-glossy rubber modified aromatic vinyl-vinyl cyanide copolymer and a method for continuously preparing the same. The copolymer comprises about 80 to about 93% by weight of an aromatic vinyl-vinyl cyanide copolymer grafted onto about 7 to about 20% by weight of a diene-based rubber, and a dispersed phase of the copolymer has an average rubber particle diameter of about 6 to about 20 ?m and a span of about 1.2 to about 2.8.
Type:
Grant
Filed:
December 29, 2008
Date of Patent:
January 29, 2013
Assignee:
Cheil Industries Inc.
Inventors:
Hwan Seok Park, Young Sub Jin, Jae Keun Hong, Sung Kwan Kim, Byeong Do Lee, Ho Ryong Sun, Seung Dae Lee
Abstract: The present invention relates to compositions and processes of making polymers having a controlled molecular weight distribution. The molecular weight distribution is controlled, for example, by controlling the relative monomer concentrations during contact with a pre-catalyst and/or using a catalyst comprising a catalytic amount of a molecule having the structure: wherein M=group 2-8 metal, preferably group 4 as a neutral or charged moiety; Y=any substituent including fused rings; L=any ligating group, especially a pyridyl or pyridylamide; X=alkyl, aryl, substituted alkyl, H or hydride, halide, or other anionic moiety; y=an integer from 0 to the complete valence of M; R=alkyl, aryl, haloalkyl, haloaryl, hydrogen, etc; x=1-6, especially 2; Dashed line=optional bond, especially a weak bond; and X and (CR2)x may be tethered or part of a ring.
Type:
Grant
Filed:
December 7, 2006
Date of Patent:
January 29, 2013
Assignee:
Dow Global Technologies LLC
Inventors:
Phillip D. Hustad, Roger L. Kuhlman, Robert D. J. Froese, Timothy T. Wenzel, Joseph N. Coalter, III
Abstract: The invention discloses improved processes to halogenate polymers. In particular, the invention discloses to improved processes to halogenate polymers made from C4-1012 isoolefins.
Type:
Grant
Filed:
February 11, 2011
Date of Patent:
January 15, 2013
Assignee:
ExxonMobil Chemical Patents Inc.
Inventors:
David Yen-Lung Chung, Michael Francis McDonald, Robert Norman Webb, Richard Dwight Hembree
Abstract: Provided herein are telechelic polymers and methods for producing the same. In some embodiments, provided herein are compounds having the formula and methods for producing the same.
Abstract: A sulfur-containing cycloaliphatic compound, useful as a crosslinker for filled sulfur-vulcanizable elastomer compositions, is represented by the general formula: G[—CaH2a—S—S(?O)b—R]n wherein G is a saturated, monocyclic aliphatic group of valence n containing from 5 to 12 carbon atoms and optionally containing at least one halogen or a saturated monocyclic silicone [RSiO—]n[R2SiO—]p group of valence n; each R independently is a monovalent hydrocarbon of up to 20 carbon atoms; each occurrence of subscripts a and b independently is an integer wherein a is 2 to 6 and b is 1 or 2; n is an integer of from 3 to 6; and p is an integer of from 0 to 3.
Type:
Grant
Filed:
October 30, 2008
Date of Patent:
December 18, 2012
Assignee:
Momentive Performance Materials, Inc.
Inventors:
Michael Joseph O'Brien, Robert James Perry, Richard W. Cruse, William Michael York, Carla Recker, Thomas Kramer, Katharina Herzog
Abstract: Provided is a modified ethylene-vinyl alcohol copolymer (C) having an ethylen content of 5 to 55 mol %, which contains a specific structural unit (I) in an amount of 0.3 to 40 mol % and may be obtained by reacting an ethylene-vinyl alcohol copolymer (A) with a monofunctional epoxy compound (B) having a molecular weight of not more than 500. This can be produced by a method for producing the modified ethylene-vinyl alcohol copolymer (C) which comprises melting and kneading an ethylene-vinyl alcohol copolymer (A) with a monofunctional epoxy compound (B) in an extruder. The modified ethylene-vinyl alcohol copolymer (C) is superior to a unmodified ethylene-vinyl alcohol copolymer (A) in transparency, stretchability, flexibility and flexing resistance due to the specific structural unit (I) incorporated therein, and thus, can be used as a barrier material in various applications requiring the above performance capabilities.
Type:
Grant
Filed:
May 10, 2010
Date of Patent:
December 11, 2012
Assignee:
Kuraray Co., Ltd.
Inventors:
Kaoru Ikeda, Shinji Tai, Kouta Isoyama, Tomoyuki Watanabe
Abstract: Surface modification methods for an interpenetrating polymer network (IPN) hydrogel to provide a basis for cell or tissue attachment are provided. The method involves the activation of functional groups on the surface of the IPN hydrogel. The activated functional groups are then reacted with amine-containing molecules or hydroxyl-containing molecules. The methods (i) can be performed in an aqueous environment and do not require the use of any organic solvent, (ii) do not require UV treatment, thereby avoiding denaturation of the IPN hydrogel or proteins, and/or (iii) can be performed as a one pot reaction.
Type:
Grant
Filed:
November 5, 2009
Date of Patent:
December 11, 2012
Assignee:
The Board of Trustees of the Leland Stanford Junior University
Inventors:
Laura Hartmann, Stayce E. Beck, Jennifer R Cochran, Curtis W Frank