Patents Represented by Attorney Frederick H. Colen
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Patent number: 4105641Abstract: The present invention relates to a process for the preparation of polycarbonates which contain aliphatically bound hydroxyl groups by transesterification of aliphatic dihydroxy compounds with glycol carbonate, optionally in the presence of transesterification catalysts, with simultaneous separation of the glycol by fractional distillation, which process is characterized in that ethylene glycol is removed from the reaction mixture as an azeotropic mixture by means of inert solvents with which ethylene glycol is substantially immiscible. The present invention further relates to the preparation of polyurethanes from these polycarbonates.Type: GrantFiled: March 17, 1977Date of Patent: August 8, 1978Assignee: Bayer AktiengesellschaftInventors: Hans-Josef Buysch, Heinrich Krimm, Hans Rudolph
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Patent number: 4105712Abstract: Molding compositions having an oxygen index of greater than 0.30 based on high molecular weight aromatic polycarbonates containing 0.5-20% of organic fibers.Type: GrantFiled: November 24, 1975Date of Patent: August 8, 1978Assignee: Bayer AktiengesellschaftInventors: Dieter Margotte, Hugo Vernaleken
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Patent number: 4102859Abstract: The present invention teaches mixtures of neutral esters of phosphorous acid with oxetane compounds and plastics stabilized by the incorporation of said mixtures. The present invention teaches a method of improving the retention of light transmission in plastics, particularly polycarbonate, by the incorporation therein of mixtures of neutral esters of phosphorous acid and oxetane compounds in which there are 2 to 10 oxetane groups per phosphorus atom.Type: GrantFiled: July 22, 1976Date of Patent: July 25, 1978Assignee: Bayer AktiengesellschaftInventors: Erich Eimers, Rolf Dheim, Wolfgang Cohnen
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Patent number: 4101530Abstract: This invention relates to a process for the production of new polyisocyanate mixtures containing blocked isocyanate groups, to binders containing these polyisocyanate mixtures and to the use of the new polyisocyanate mixtures as an isocyanate component in polyurethane stoving lacquers.Type: GrantFiled: October 22, 1976Date of Patent: July 18, 1978Assignee: Bayer AktiengesellschaftInventors: Tilo Burkhardt, Manfred Schonfelder
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Patent number: 4101578Abstract: This invention relates to new cycloaliphatic triamines which are valuable intermediate products for synthetic resins, above all for lightfast and weather resistant polyurethane resins and in particular for solvent-free or low solvent polyurethane lacquers.Type: GrantFiled: March 17, 1977Date of Patent: July 18, 1978Assignee: Bayer AktiengesellschaftInventors: Manfred Bock, Josef Pedain, Rudolf Braden
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Patent number: 4100130Abstract: The present invention relates to flame resistant aromatic polycarbonate molding compositions which are blends containing between about 0.1 to 15 wt.% of sulphur. The blends of the present invention may also contain up to about 30 wt.% of glass fibers. The present invention also relates to improving the flame resistance of polycarbonate molding compositions by physically incorporating 0.1 to 15 wt.% of sulphur therein.Type: GrantFiled: July 2, 1975Date of Patent: July 11, 1978Assignee: Bayer AktiengesellschaftInventors: Dieter Freitag, Werner Nouvertne
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Patent number: 4098754Abstract: The present invention is concerned with a process for the production of high molecular weight thermoplastic ppolycarbonates having improved flame resistance and in conjunction with glass fibres, improved mechanical properties and the polycarbonates so produced. A solution polycarbonate is reacted with an alkali metal salt soluble in the melt of the polycarbonate until the Staudinger Index has increased by about 3 to 30 cm.sup.3 /g. This usually requires about 0.0001 to 0.1 wt. % of the salt, based on the weight of polycarbonate and a temperature of about 250.degree. to 400.degree. C for between about 1 and 30 minutes. In a preferred embodiment the reaction is conducted in a self-cleaning twin screw extruder.Type: GrantFiled: December 11, 1975Date of Patent: July 4, 1978Assignee: Bayer AktiengesellschaftInventors: Dieter Neuray, Hugo Vernaleken, Claus Wulff, Ralf Lange
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Patent number: 4098933Abstract: This invention relates to a process for producing stable water dispersible blocked polyisocyanates, the compounds so produced and their use in producing coatings and films. These compounds are produced by blocking about 50 to 99.8 weight % of the isocyanate groups of an organic polyisocyanate and then reacting the partially blocked polyisocyanate with a compound carrying both an isocyanate reactive hydrogen and a hydrophilic group, e.g. a carboxylic acid salt or polyethylene oxide or a group convertible to a hydrophilic group, e.g. a carboxylic acid or tertiary amine. The blocked polyisocyanate with hydrophilic groups may then be dispersed in water with organic compounds having at least two isocyanate reactive hydrogen atoms per molecule and then cured by driving off the water and raising the temperature sufficiently high to unblock the polyisocyanate.Type: GrantFiled: November 10, 1975Date of Patent: July 4, 1978Assignee: Bayer AktiengesellschaftInventors: Tilo Burkhardt, Kuno Wagner, Kurt Findeisen
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Patent number: 4097435Abstract: A glass-fiber reinforced aromatic polycarbonate is provided with improved ductility and improved mold release properties which is comprised of an aromatic polycarbonate resin, glass-fibers and an ester wax of montanic acid.Type: GrantFiled: April 11, 1977Date of Patent: June 27, 1978Assignee: Mobay Chemical CorporationInventors: Herbert L. Rawlings, Arthur L. Baron
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Patent number: 4096291Abstract: A process for the low solvent or solvent free coating of heat resistant substrates by using a coating substance which has a melting point or range below about 200.degree. C and which is heat crosslinkable. The substrate is coated at temperatures between about 20.degree. and 250.degree. C and the coating is subsequently heated to more elevated temperatures to effect crosslinking. The coating substance contains active hydrogen, preferably hydroxyl bearing compounds and blocked polyisocyanates which become reactive when the coating substance is heated to effect cross-linking. In a preferred embodiment, the blocked polyisocyanates consist of at least 40 equivalent percent alkanol or cycloalkanol blocked polyisocyanates. Also a coating substance containing at least 50 wt.% of a combination of active hydrogen, preferably hydroxyl bearing compounds and blocked isocyanates. The combination has a melting point of less than 200.degree. C and a blocked isocyanate group to active hydrogen ratio of about 1:2 to 1:9.Type: GrantFiled: January 28, 1975Date of Patent: June 20, 1978Assignee: Bayer AktiengesellschaftInventors: Willi Dunwald, Jurgen Lewalter, Wilfried Zecher, Wolf-Dieter Last
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Patent number: 4092243Abstract: Polycarbonates are provided based on aromatic bis-hydroxy compounds which contain s-triazine compounds as linking members between 2 mols of the aromatic bis-hydroxy compounds bonded in each case via an oxygen atom thereof, on the one hand, and via carbon atoms of the s-triazine ring, on the other, the s-triazine rings carrying, on at least one further carbon atom, organic radicals with functional groups, these radicals being bonded via oxygen, nitrogen or sulphur. The novel polycarbonates may be used as selective solvents for hydrocarbons mixed with water or for making resins or coatings.Type: GrantFiled: February 4, 1976Date of Patent: May 30, 1978Assignee: Bayer AktiengesellschaftInventors: Dieter Neuray, Hugo Vernaleken, Hans Rudolph
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Patent number: 4092286Abstract: The present invention relates to water-dispersible polyurethane elastomers having a substantially linear molecular structure, characterized by(a) lateral polyalkylene oxide polyether chains having a content of ethylene oxide units of from about 0.5 to 10% by weight, based on the polyurethane as a whole and(b) a content of .dbd.N.sym..dbd., --COO.crclbar. or --SO.sub.3.crclbar. groups of from about 0.1 to 15 milliequivalents per 100 g,To aqueous dispersions of these water-dispersible polyurethane elastomers and to processes for producing these water-dispersible polyurethane elastomers.Type: GrantFiled: November 15, 1976Date of Patent: May 30, 1978Assignee: Bayer AktiengesellschaftInventors: Klaus Noll, Jurgen Grammel, Walter Meckel
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Patent number: 4081495Abstract: The invention relates to a thermoplastic moulding composition comprising an aromatic high-molecular weight polycarbonate based on a diphenol, with a weight-average molecular weight (M.sub.w) of at least 10,000 and from 0.5 to 5% by weight, relative to the high molecular weight polycarbonate, of a polycarbonate which has an M.sub.w of from 1,200 to 9,000 and which corresponds to the formula (I): ##STR1## wherein "E" represents a radical of the formula (II): ##STR2## in which THE GROUPS R' are identical and denote H or halogenx is an integer of from 7 to 24"Z" is a divalent aromatic radical, and"n", the degree of polymerization, results from the M.sub.w between 1,200 and 9,000.Type: GrantFiled: July 30, 1976Date of Patent: March 28, 1978Assignee: Bayer AktiengesellschaftInventors: Dieter Freitag, Werner Nouvertne, Frank Kleiner
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Patent number: 4080371Abstract: The present invention relates to a process of producing .alpha., .alpha., .alpha., .alpha.', .alpha.', .alpha.'-hexakisaryl-1,3- and -1,4-dimethyl benzenes by reacting .alpha., .alpha., .alpha.', .alpha.'-tetrakisaryl-1,3 or -1,4-bis-(chloromethyl)- or -bis-(hydroxymethyl)- benzenes with 2 to 30 times the molar quantity (based on the tetrakis benzene) of phenol or a substituted phenol.Type: GrantFiled: June 28, 1976Date of Patent: March 21, 1978Assignee: Bayer AktiengesellschaftInventors: Erhard Tresper, Dieter Freitag, Dieter Neuray
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Patent number: 4075119Abstract: The invention relates to statistical mixtures of halogenated bisphenols with halogen-free bisphenols and to processes for their preparation. This invention further relates to new aromatic, bromine-containing and/or chlorine-containing, high-molecular weight thermoplastic polycarbonates with good resistance to fire (oxygen index .gtoreq. 36%) and good flow properties, to their preparation from the statistical mixtures of halogenated bisphenols and halogen-free bisphenols and to their use alone or as a mixture with halogen-free polycarbonates or with thermoplastic polyesters for the preparation of moldings, films and fibers.Type: GrantFiled: April 21, 1976Date of Patent: February 21, 1978Assignee: Bayer AktiengesellschaftInventors: Manfred Schmidt, Dieter Freitag, Werner Nouvertne
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Patent number: 4073769Abstract: Phosphites of the general formula: ##STR1## in which N.sub.1 IS AN INTEGER;n.sub.2 is 0 or an integer;n.sub.3 is an integer;At least one of the groups R is an oxetane group as hereinafter defined or a hydrocarbon radical being substituted at least by one oxetane group as hereinafter defined;The remaining groups R are selected from alkyl, aralkyl, cycloalkyl, aryl and hetaryl groups; andThe group or groups Ar are the same or different at-least-divalent aromatic groups the free valencies of which are directly linked to the aromatic nuclei;And a process for their preparation.Type: GrantFiled: November 25, 1975Date of Patent: February 14, 1978Assignee: Bayer AktiengesellschaftInventors: Erich Eimers, Dieter Margotte, Helmut Schmid, Rolf Dhein
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Patent number: 4070330Abstract: High impact mineral filled polycarbonates are comprised of a polycarbonate resin of a novaculite mineral filler having an average particle size of less than 5 microns. The percentage of novaculite is based on the total weight of the polycarbonate resin and novaculite. The polycarbonate articles formed from the mineral filled blends exhibit excellent impact properties over typical fillers for polycarbonate resin. Impact properties of the polycarbonate can be further improved by the addition of a silane coupling agent to the polycarbonate novaculite blend.Type: GrantFiled: January 23, 1976Date of Patent: January 24, 1978Assignee: Mobay Chemical CorporationInventor: Herbert L. Rawlings
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Patent number: 4066617Abstract: Poly(alkylene terephthalates) are stabilized during high temperature processing by neutral esters of phosphorous acid having at least one oxetane group. The stabilized poly(alkylene terephthalates) are resistant to molecular weight degradation and discoloration during melt processing of the polymer when the polymer is being extruded and formed into molded articles.Type: GrantFiled: August 23, 1976Date of Patent: January 3, 1978Assignee: Mobay Chemical CorporationInventors: Herbert L. Rawlings, Arthur L. Baron
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Patent number: 4065401Abstract: The invention refers to a blowing agent composition consisting of 1,4 butan-diol-bis-(carbonic acid ester-benzoic acid anhydride) and silicon dioxide. Silicon dioxide reduces the decomposition temperature of the anhydride while at the same time increasing the yield of gas substantially.Type: GrantFiled: August 22, 1975Date of Patent: December 27, 1977Assignee: Bayer AktiengesellschaftInventors: Wolfgang Cohnen, Gerhard Apel
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Patent number: RE29623Abstract: Light stable polyurethane coatings with a considerably increased softening range and melting points coupled with improved resistance to perchlorethylene is obtained by using a chain extender comprising at least 80 mol % 1,4-diamino cyclohexane with a cis/transisomer ratio of from 10/90 to 60/40 .Iadd.and by using aliphatic or cycloaliphatic diisocyanates wherein such diisocyanates consist of at least 75 mol percent of 1-isocyanato-3-isocyanatomethyl-3,5,5-trimethyl cyclohexane.Iaddend..Type: GrantFiled: September 3, 1976Date of Patent: May 2, 1978Assignee: Bayer AktiengesellschaftInventors: Harald Oertel, Bruno Zorn, Wilhelm Thoma, Klaus Noll