Abstract: The present invention relates to compositions based on elastomeric polymers of vinylidene fluoride, hexafluoropropene and optionally tetrafluoroethylene suitable for providing microcellular foamed vulcanized articles by extrusion or compression molding. In the case of the production of extruded articles based on vinylidene fluoride and hexafluoropropene copolymers, the compositions comprise: the copolymer, bisphenol AF, a quaternary phosphonium or aminophosphonium salt, azodicarbonamide, MgO, Ca(OH)2, zinc stearate and a plasticizer, each of the components being contained in an exactly defined proportion.
Type:
Grant
Filed:
December 11, 1998
Date of Patent:
May 15, 2001
Assignee:
Ausimont S.p.A.
Inventors:
Franco Barbieri, Raffaele Ferro, Giuseppe Fiorillo
Abstract: Foam forming techniques are capable of permitting foaming of biodegradable resin to be positively and uniformly accomplished to provide a biodegradable resin foam with satisfactory quality. The biodegradable resin foam is made of biodegradable resin a main biodegradable resin ingredient of 100° C. or more in melting point and a low-melting biodegradable resin ingredient of 100° C. or less in melting point. The biodegradable resin foam is produced by placing a starting material of at least biodegradable resin and a substantial amount of moisture in a heated and pressurized environment, releasing the starting material from the environment to foam the biodegradable resin, and subjecting the foamed resin to forming by a forming mold. An apparatus for producing the foamed biodegradable resin foam includes a pressure adjusting chamber, an air-permeable forming mold, a pressure reducing tank and an injection machine.
Abstract: An improved microbiological fire-fighting foam which comprises a bioremediating component, surfactants, foaming agents, and inorganic nutrients, the bioremediating component consisting substantially of sporulating bacteria which are tolerant of the surfactants used, the surfactants selected being innocuous to the bioremediating component used both when the microbes are in a spore state and when activated, and the selected surfactants further being biodegradable by the microbes of the microbial solution. Alternative embodiments of the invention include formulations which comprise perfumes and/or preservatives in addition to the constituents mentioned above. The improved formulation enables microbiological digestion to inert volatile organic compounds and hydrocarbons which may indeed be ablaze when applied.
Abstract: A lightweight shock absorber has an ideal F-S waveform, and is formed of a foam resin material. The cross-sectional area of the absorber in the compression axis direction and the vertical direction changes at least partially in the compression axis direction, and consequently the relation between distortion and compressive stress in the compression axis direction (F-S waveform) is approximately linear.
Type:
Grant
Filed:
July 20, 1999
Date of Patent:
April 24, 2001
Assignee:
Bridgestone Corporation
Inventors:
Shin Tada, Tatsuo Yata, Keiichiro Tabata, Yoichi Nabeshima
Abstract: A rigid foamed polyurethane molding which reduce dust-scattering in cutting and is useful to a modeling stock. Said molding is produced by curing a composition by a mechanical frothing method, said composition comprising: a polyol with a filler (c); and a slight amount of dehydrating agent (d);
wherein said composition further contains 3 to 30 percent, based on the total weight of the composition, of a (poly) oxyalkylene compound (e) expressed by the general formula
Z[(AO)mX]n
in which “A” represents an alkylene group with two to four carbon atoms; “X” is a hydrocarbyl group or an acyl group; “m” is a value of one to one hundred; “n” is an integer of one to six; and “Z” is a residue produced by removing the active hydrogen atoms from a compound containing n active hydrogen atoms, in which at least one of Z and n X's has 5 to 20 carbon atoms.
Abstract: It has been found that non-chlorinated pentafluoropropane blowing agents may be used alone or in combination with water in flexible integral skin foams. For example, foams prepared from a resin blend incorporating 1,1,1,3,3-pentafluoropropane (HFA-245fa) alone or in combination with water exhibit physical characteristics such as resistance to abrasion and cracking on flex comparable to conventional chlorinated fluorocarbon blown foams. Such foams made using the resin blend of the present invention are suitable for use in many applications including, for example, shoe soles.
Type:
Grant
Filed:
December 30, 1997
Date of Patent:
April 17, 2001
Assignee:
BASF Corporation
Inventors:
Valeri L. Valoppi, Elizabeth S. Bredeson
Abstract: Dispersion polyols which are liquid-liquid dispersions containing a first having a substantially Polyoxypropylene internal block having an equivalent weight in excess of about 700 Da and a high oxyethylene-content external block, and a second polyol which is a substantially polyoxyethylene polyol containing minimally 50 weight percent oxyethylene moieties. The dispersion polyols are stable and exhibit broad processing latitude when preparing hypersoft polyurethane foams. The dispersion polyols are advantageously prepared in situ, preferably in the presence of a double metal cyanide oxyalkylation catalyst.
Abstract: The use of a tin salt together with a salt of a protic acid having at least 2 acidic hydrogen atoms and a pKa in water of 2-10 in preparing water-blown polyurethane foams.
Abstract: Process for making rigid polyurethane or urethane-modified polyisocyanurate foams comprising the step of reacting an organic polyisocyanate composition with an isocyanate-reactive composition comprising a polyester polyol in the presence of an amine catalyst characterized in that the pKa of the conjugated ammonium salt of said amine is less than 12.
Type:
Grant
Filed:
October 17, 1997
Date of Patent:
March 27, 2001
Assignee:
Imperial Chemical Industries PLC
Inventors:
Thomas Heinrich Sieker, Franco Gabrieli
Abstract: Low resilience urethane foam having excellent low resilience at room temperature and having capability of suppressing increase of hardness even at low temperature. The low resilience urethane foam, produced by reaction of urethane foam compositions comprising polyol (a), polyisocyanate (b), catalyst (c) and blowing agent (d), has at least one glass transition point in each of a temperature range of −70° C. to −20°C. and a temperature range of 0° C. to 60° C. Where the glass transition point is expressed as a tan &dgr; peak obtained when measurement on dynamic viscoelasticity of the low resilience urethane foam is carried out at a frequency of 10 herz, at least one of the tan &dgr; peak(s) at the temperature range of −70° C. to −20° C. is 0.15 or more and at least one of the tan &dgr; peak(s) at the temperature range of 0° C. to 60° C. is 0.3 or more.
Abstract: The present invention provides a reactive catalyst composition for making a water blown flexible polyurethane foam. The catalyst composition comprises a tertiary amino alkyl urea and/or bis(tertiary amino alkyl) urea in combination with either a tertiary amine gelling catalyst or a tertiary amine blowing catalyst. The use of such catalyst composition improves the physical properties of the polyurethane foam.
Type:
Grant
Filed:
February 24, 1999
Date of Patent:
March 13, 2001
Assignee:
Air Products and Chemical, Inc.
Inventors:
Lisa Ann Mercando, Mark Leo Listemann, Michael John Kimock
Abstract: Compact and preferably cellular polyurethane elastomers are prepared by reacting
a) relatively high molecular weight polyhydroxyl compounds and if desired,
b) low molecular weight chain extenders and/or crosslinkers with
c) phenylene 1,4-diisocyanate (p-PDI) and at least one additional aromatic diisocyanate selected from the group consisting of tolylene diisocyanate, diphenylmethane diisocyanate, 3,3′-dimethylbiphenyl diisocyanate, 1,2-diphenylethane diisocyanate and/or aliphatic diisocyanate, having from 4 to 12 carbon atoms and/or cycloaliphatic diisocyanate having from 6 to 18 carbon atoms, where the formative components (a), (c) and, if used, (b) are advantageously reacted by the prepolymer method,
in the presence or absence of
d) catalysts,
e) blowing agents and
f) additives.
Isocyanate prepolymers suitable for this purpose are described.
Type:
Grant
Filed:
January 11, 1999
Date of Patent:
March 6, 2001
Assignee:
BASF Aktiengesellschaft
Inventors:
Manfred Genz, Walter Haselhorst, Torsten Jeschke, Ute Bruns, Heinz Bollmann, Michael Strauss, Wolfgang Scholz, Rüdiger Voelkel, Hartmut Peuker, Gerhard Hellmann
Abstract: A process for the preparation of foamed plastics materials based on polyisocyanate polyaddition products by the reaction of isocyanates with isocyanate-reactive compounds in the presence of catalysts and, optionally, auxiliaries and/or additives, wherein
i) isocyanates having isocyanurate and/or biuret structures are used, the isocyanate-reactive compounds used are
ii) at least one diol and/or polyol having a molecular weight of from 400 to 8000 and containing at least 50% of primary hydroxyl groups based on all of the hydroxyl groups present in the compound,
iii) at least one compound having at least one primary amine group, and diols and/or triols having molecular weights of less than 400 are optionally used as chain-extending and/or crosslinking agents, the reaction being carried out in the presence of
iv) at least one tertiary amine acting as catalyst and/or
v) at least one metal salt acting as catalyst and
vi) water.
Type:
Grant
Filed:
March 17, 1999
Date of Patent:
February 20, 2001
Assignee:
BASF Aktiengesellschaft
Inventors:
Dietrich Scherzer, Ulrich Treuling, Klaus Wagner, Rolf Illguth, Sarbananda Chakrabarti
Abstract: The invention relates to improved hydrophilic, polyurethane gel substances and foams, the use of polyurethane gel substances for pressure-distributing, in particular self-adhesive polyurethane-(foam) gels, and the use of said polyurethane gel substances for moulded structures and adhesive coatings.
Type:
Grant
Filed:
November 3, 1998
Date of Patent:
February 20, 2001
Assignee:
Bayer A.G.
Inventors:
Otto Ganster, Jörg Büchner, Jochen Werner Kenndoff, Günther Sachau
Abstract: A dispersant for aqueous mill-bases obtainable by reacting a polyethylene glycol with a molar excess of a hydroxycarboxylic acid containing from 4 to 17 carbon atoms or lactone thereof and/or with a C3-4-alkylene oxide to form a polymeric diol and phosphating the diol. The preferred hydroxycarboxylic acid or lactone is &egr;-caprolactone.
Abstract: A cast-molding material for a plastic lens which is almost free from causing defective dyeing when dyed, and a process for producing plastic lenses almost free from causing defective dyeing, the cast-molding material containing, as essential components, a combination of (A) diethylene glycol bisallylcarbonate or a mixture of diethylene glycol bisallylcarbonate and a monomer copolymerizable therewith, with (B) a polyether-modified silicone compound, and the process comprising cast-molding the above cast-molding material in a mold.
Abstract: Process for preparing a flexible polyurethane foam by reacting a polyisocyanate and two different polyols under foam forming conditions so as to prepare a rigid foam, by crushing the rigid foam so obtained and by subjecting the flexible foam so obtained to a heat treatment. Flexible foams are obtained which do not show a major glass transition temperature between −100° C. and +25° C.
Abstract: A process for preparing radiation-curable, urethane-functional prepolymers by reacting an isocyanate-functional component A with an OH-containing component B, wherein either component A embraces two different isocyanate compounds A1 or one isocyanate compound A1 and at least one isocyanate compound A2 or component B embraces at least two different compounds B1. Also, the prepolymers obtainable by the process and the radiation-curable formulations comprising them. Furthermore, the use of the radiation-curable formulations for coating substrates, a method of coating substrates, and the coated substrates themselves.
Type:
Grant
Filed:
September 21, 1998
Date of Patent:
January 23, 2001
Assignee:
BASF Aktiengesellchaft
Inventors:
Reinhold Schwalm, Rainer Königer, Wolfgang Paulus, Wolfgang Reich, Erich Beck, Matthias Lokai, Klaus Menzel
Abstract: In a process for producing self-releasing, compact or cellular moldings which comprise polyisocyanate polyaddition products and may contain reinforcing material by reacting
a) organic and/or modified organic polyisocyanates with
b) at least one compound containing at least two reactive hydrogen atoms and having a molecular weight of from 62 to 10,000 and, if desired,
c) chain extenders and/or crosslinkers in the presence of
d) internal mold release agents and in the presence of or absence of
e) catalysts,
f) blowing agents,
g) reinforcing materials and
h) auxiliaries
in an open or closed mold, the internal mold release agents (d) used are diesters and/or monoesters of alkylsuccinic acids and/or diesters and/or monoesters of alkenylsuccinic acids.
Type:
Grant
Filed:
May 14, 1999
Date of Patent:
January 2, 2001
Assignee:
BASF Aktiengesellschaft
Inventors:
Peter Horn, Dietrich Scherzer, Karl H{umlaut over (a)}berle, Ulrich Treuling, Georg Partusch, G{umlaut over (u)}nter T{umlaut over (a)}nny, Axel Kistenmacher
Abstract: Films, made of polyethylenes and fillers, and articles made therefrom greater WVTR than previously available films based on conventional Ziegler-Natta based polyethylenes. The polyethylenes are produced in a metallocene-catalyzed production process. The films may be made by a cast film process, and may be made in widely varying filler content, generally polyethylene to filler ratios of 30/70 to 70/30. The metallocene based polyethylenes when combined with filler also permit the extrusion of thinner films leading to lighter weight and softer films. The m-polyethylenes utilized for making such films typically have a Composition Distribution Breadth Index above 50%, a Mw/Mn below 3, and a Mz/Mw below 2.
Type:
Grant
Filed:
July 31, 1996
Date of Patent:
April 3, 2001
Assignee:
Exxon Chemical Patents Inc.
Inventors:
Jeffrey Alan Middlesworth, Kevin Arthur Brady