Patents Assigned to Isovolta Osterreichische Isolierstoffwerke Aktiengesellschaft
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Patent number: 4747898Abstract: A method of producing a plastic leaf spring for motor vehicles comprising forming a plurality of cured duromeric plastic strips reinforced with high strength fibers aligned substantially in the direction of the maximum elongation or compression of the fibers occurring under spring load at least in essential resilient regions of the spring, the said resilient regions being said strips bonded together by an adhesive and eventually also being bonded to a second, more resilient element and/or to another element and a process for its preparation.Type: GrantFiled: June 2, 1987Date of Patent: May 31, 1988Assignee: Isovolta Osterreichische Isolierstoffwerke AktiengesellschaftInventor: Herbert Woltron
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Patent number: 4503266Abstract: In a process for the preparation of phenol-aromatic ketone condensation products by reaction of phenols and ketones in the presence of a gaseous hydrogen halide, the improvement comprising adding in catalytic amounts up to less than molar amounts based on the ketone as an additional condensation agent at least one bivalent, trivalent or tetravalent metal halide, introducing the gaseous hydrogen halide and after termination of the condensation reaction, adding water to the reaction mixture and recovering the purified condensation product and to the novel monomers of 9,9-bis-(4-hydroxyphenyl)-fluorene with a melting point of at least 226.degree. C. and 1,1-bis-(4-hydroxyphenyl)-1-phenylethene with a melting point of at least 189.degree. C. which are useful for the preparation of improved polyester resins.Type: GrantFiled: June 7, 1984Date of Patent: March 5, 1985Assignee: Isovolta Osterreichische Isolierstoffwerke AktiengesellschaftInventor: Otto Szabolcs
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Patent number: 4467122Abstract: In a process for the preparation of phenol-aromatic ketone condensation products by reaction of phenols and ketones in the presence of a gaseous hydrogen halide, the improvement comprising adding in catalytic amounts up to less than molar amounts based on the ketone as an additional condensation agent at least one bivalent, trivalent or tetravalent metal halide, introducing the gaseous hydrogen halide and after termination of the condensation reaction, adding water to the reaction mixture and recovering the purified condensation product and to the novel monomers of 9,9-bis-(4-hydroxyphenyl)-fluorene with a melting point of at least 226.degree. C. and 1,1-bis-(4-hydroxyphenyl)-1-phenylethene with melting point of at least 189.degree. C. which are useful for the preparation of improved polyester resins.Type: GrantFiled: May 18, 1982Date of Patent: August 21, 1984Assignee: Isovolta Osterreichische Isolierstoffwerke AktiengesellschaftInventor: Otto Szabolcs
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Patent number: 4452831Abstract: A method for producing elastomeric foils by continuously impregnating a non-woven fabric with a resinous composition in liquid form selected from the group consisting of (a) a resin based on polyhydroxy compounds or polyamines or mixtures thereof and polyisocyanates, (b) resins based or polyhydroxy compounds or polyamines or polycarboxyl compounds or mixtures thereof and polyepoxides and (c) an impregnating mixture based on rubber latex, drying and curing the impregnated fabric freely suspended in hot air and removing the dried foil which is useful as an intermediate layer in the bonding of objects with a high E-molulus and the bonded object per se.Type: GrantFiled: March 20, 1981Date of Patent: June 5, 1984Assignee: Isovolta Osterreichische Isolierstoffwerke AktiengesellschaftInventors: Walter Eichberger, Alfred Blaschke
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Patent number: 4446195Abstract: An organic, high-molecular weight polyester containing substantially chain members of the formula--O--X--O--Y--wherein X is at least one member of the group consisting of ##STR1## and Y has the formula ##STR2## having an inherent viscosity of at least 1.0 dl/g, preferably at least 1.2, dl/g measured at 30.degree. C. in a solution of 0.5 g of the polyester in 100 ml of a mixture of 60% by weight of phenol and 40% by weight of 1,1,2,2-tetrachloroethane and whose films cast from a chlorinated organic solution have an elongation at break of at least 10%, preferably at least 20%, measured according to ASTM D-882-75 b with the proviso that if the inherent viscosity is between 1.0 dl/g and 1.5 dl/g, Y is a mixture of 70 to 30% of terephthalic acid and 30 to 70% of isophthalic acid having excellent properties for electrical insulation as well as other fields.Type: GrantFiled: March 2, 1983Date of Patent: May 1, 1984Assignee: Isovolta Osterreichische Isolierstoffwerke AktiengesellschaftInventors: Werner Rieder, Martin Fehrle
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Patent number: 4418122Abstract: An organic, high-molecular weight polyester containing substantially chain members of the formula ##STR1## wherein X is at least one member selected from the group consisting of ##STR2## having an inherent viscosity of at least 1.0 dl/g, preferably at least 1.2 dl/g measured at 30.degree. C. in a solution of 0.5 g of the polyester in 100 ml of a mixture of 60% by weight of phenol and 40% by weight of 1,1,2,2-tetrachloroethane and whose films cast from a solution in a chlorinated organic solvent have an elongation at break of more than about 20%, preferably at least 40% measured according to ASTM D 882-75 b having excellent properties for electrical insulation as well as other fields.Type: GrantFiled: March 2, 1983Date of Patent: November 29, 1983Assignee: Isovolta Osterreichische Isolierstoffwerke AktiengesellschaftInventors: Werner Rieder, Martin Fehrle
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Patent number: 4247681Abstract: A process for the preparation of aromatic polyesters which are characterized particularly by high-temperature stability and difficult inflammability and which show, in addition, a low development of heat and a high char yield in combustion.Type: GrantFiled: July 17, 1979Date of Patent: January 27, 1981Assignee: Isovolta Osterreichische Isolierstoffwerke AktiengesellschaftInventors: Hermann Mark, Otto Szabolcs
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Patent number: 4201833Abstract: An incombustible building element with good thermal insulation properties produced by spraying granules of vermiculite with an organic binder, prepressing the coated granules into a biscuit and heating and pressing the biscuit in a press to transform it into a building material element.Type: GrantFiled: March 22, 1978Date of Patent: May 6, 1980Assignee: Isovolta Osterreichische Isolierstoffwerke AktiengesellschaftInventors: Kurt Kirsch, Volkmar Hilzensauer, Gunther Pflug, Felix Wehrmann, Gerald Maresch
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Patent number: 4191667Abstract: An improved building material element or board having good thermal insulation properties comprising expanded vermiculite granules coated with 2 to 30% by weight, based on the weight of vermiculite, with an organic binder formed into a press cake which is then press heated to form the building element, the improvement comprising that at least a portion of the coated vermiculite granules are recycled particles which increases the density and has a more uniform and more easily sized surface and a process for its preparation.Type: GrantFiled: March 24, 1978Date of Patent: March 4, 1980Assignee: Isovolta, Osterreichische Isolierstoffwerke AktiengesellschaftInventors: Felix Wehrmann, Rene-Hagen Voelkl, Edwin Wojta
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Patent number: 4141957Abstract: Process and apparatus for producing high molecular weight polymers by the two-phase interfacial method comprising bringing two liquid phases containing polymerizable reactants continuously into contact with one another in a predetermined quantitative ratio to one another and passing the resulting mixture through one mixing stage or a plurality of serially connected mixing stages, the mixture being divided into a plurality of partial streams in each mixing stage, and causing the partial streams together with their flow boundaries to move transversely to their main directions of flow at mean speeds higher than 5 meters per second and to pass into a mixing chamber which has at least one outlet duct and in which the kinetic energy of the mixture is reduced from the highest value attained in the mixing to a value which is low in relation to said highest value, the portions of the mixture flowing in the mixing chamber being subjected to flow conditions which substantially vary at least periodically.Type: GrantFiled: April 24, 1978Date of Patent: February 27, 1979Assignee: Isovolta Osterreichische Isolierstoffwerke AktiengesellschaftInventors: Otto Szabolcs, Hans Schuller
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Patent number: 4107409Abstract: A process for producing high molecular weight polymers by the two-phase interfacial method comprising bringing two liquid phases containing polymerizable reactants continuously into contact with one another in a predetermined quantitative ratio to one another and passing the resulting mixture through one mixing stage or a plurality of serially connected mixing stages, the mixture being divided into a plurality of partial streams in each mixing stage, and causing the partial streams together with their flow boundaries to move transversely to their main directions of flow at mean speeds higher than 5 meters per second and to pass into a mixing chamber which has at least one outlet duct and in which the kinetic energy of the mixture is reduced from the highest value attained in the mixing to a value which is low in relation to said highest value, the portions of the mixture flowing in the mixing chamber being subjected to flow conditions which substantially vary at least periodically.Type: GrantFiled: June 27, 1977Date of Patent: August 15, 1978Assignee: Isovolta Osterreichische Isolierstoffwerke AktiengesellschaftInventors: Otto Szabolcs, Hans Schuller
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Patent number: RE31421Abstract: An improved building material element or board having good thermal insulation properties comprising expanded vermiculite granules coated with 2 to 30% by weight, based on the weight of vermiculite, with an organic binder formed into a press cake which is then press heated to form the building element, the improvement comprising that at least a portion of the coated vermiculite granules are recycled particles which increases the density and has a more uniform and more easily sized surface and a process for its preparation.Type: GrantFiled: September 8, 1981Date of Patent: October 18, 1983Assignee: Isovolta Osterreichische Isolierstoffwerke AktiengesellschaftInventors: Felix Wehrmann, Rene-Hagen Voelki, Edwin Wojta