Abstract: A process for preparing a homogeneous polyol component which is stable to separation and consists of at least one compound of relatively high molecular weight having at least two reactive hydrogen atoms and low-molecular-weight chain extenders and/or crosslinkers and, if desired, of blowing agents, catalysts and other auxiliaries and/or additives comprises the addition to this component of at least one amine and at least one organic and/or modified organic isocyanate; the invention also provides the corresponding polyol component which is stable to separation.The use of this polyol component for preparing PUR, in particular compact or foamed PUR, is also described.
Type:
Grant
Filed:
February 17, 1998
Date of Patent:
May 16, 2000
Assignee:
BASF Aktiengesellschaft
Inventors:
Peter Falke, Regina Hendreich, Ralf Fritz, Inge Rotermund
Abstract: A stable dispersion of melamine in polyol components comprising at least one relatively high molecular weight compound containing at least two reactive hydrogen atoms and, if desired, low molecular weight chain extenders and/or crosslinkers, blowing agents, catalysts, flame retardants and also further auxiliaries and/or additives is prepared by using the melamine in combination with at least one amine and at least one organic and/or modified organic isocyanate.
Type:
Grant
Filed:
October 14, 1997
Date of Patent:
May 9, 2000
Assignee:
BASF Aktiengesellschaft
Inventors:
Peter Falke, Regina Hendreich, Michael Reichelt
Abstract: The invention relates to a process for the production of polyurethane foams by reactinga) at least one organic polyisocyanate withb) at least one polyalkylene-polyol (b1) having a hydroxyl number of from 30 to 500, obtainable by alkoxylation of at least one initiator molecule from the group consisting of N,N'-bis(3-aminopropyl)ethylenediamine, tripropylenetetramine and tetrapropylenepentamine using at least one alkylene oxide, preferably ethylene oxide and/or 1,2-propylene oxide, or mixtures of the polyoxyalkylene polyols (b1) and other polyhydroxyl compounds having a functionality of from 2 to 8 and a hydroxyl number of from 15 to 500, andc) if desired, chain extenders and/or crosslinking agents,in the presence ofd) blowing agents and, if desired,e) catalysts andf) additives,and to the novel polyoxyalkylene-polyols (b1) which can be used for this purpose.
Type:
Grant
Filed:
September 25, 1998
Date of Patent:
May 9, 2000
Assignee:
BASF Aktiengesellschaft
Inventors:
Peter Horn, Ludwig Jung, Harald Larbig, Rolf Lebkucher, Gerhard Lehr
Abstract: Rigid polyurethane foams having a low thermal conductivity are produced by reactinga) organic and/or modified organic polyisocyanates withb) at least one compound containing at least 2 reactive hydrogen atoms in the presence ofc) blowing agents,d) catalysts and, if desired,e) auxiliaries and/or additives,wherein graphite is added to the component a) and/or b).
Type:
Grant
Filed:
July 2, 1998
Date of Patent:
April 4, 2000
Assignee:
BASF Aktiengesellschaft
Inventors:
Guiscard Gluck, Klaus Hahn, Udo Rotermund, Otto Volkert
Abstract: Thus, there is provided according to the present invention polyol compositions comprising(A) a polytetramethylene ether glycol, and(B) a trifunctional active hydrogen compound-initiated polyoxyalkylene polyether polyol having a degree of unsaturation of not greater than 0.04 milliequivalents per gram of said polyether polyol.
Type:
Grant
Filed:
July 10, 1996
Date of Patent:
March 21, 2000
Assignee:
BASF Corporation
Inventors:
Thomas L. Fishback, Duane A. Heyman, Curtis J. Reichel, Adam J. Jaglowski
Abstract: A process for producing rigid polyurethane foams with reduced density by reactinga) organic and/or modified organic polyisocyanates withb) at least one higher-molecular-weight compound having at least two reactive hydrogen atoms and, if desired,c) low-molecular-weight chain extenders and/or crosslinkers in the presence ofd) blowing agents,e) catalysts and, if desired,f) other auxiliaries and/or additives,is described, which comprises using, as blowing agent (d), a mixture of cyclopentane with at least one compound which is homogeneously miscible with cyclopentane selected from the class consisting of the alkanes and/or alkenes having 3 or 4 carbon atoms in the molecule and with the carbon dioxide produced from water and isocyanate, and using, as higher-molecular-weight compound (b) having at least two reactive hydrogen atoms, polyethers which contain aromatics and nitrogen.The use of the rigid foams produced in this way as insulating material is also described.
Type:
Grant
Filed:
March 11, 1998
Date of Patent:
March 21, 2000
Assignee:
BASF Aktiegesellschaft
Inventors:
Gottfried Knorr, Udo Rotermund, Eva Baum, Holger Seifert, Werner Wiegmann
Abstract: A microcellular PU elastomer having improved dynamic mechanical properties and based on an isocyanate component consisting essentially of 4,4'-MDI and further customary constituents has a physicochemical structure which, in the gel permeation chromatograph (GPC) of a solution of the microcellular polyurethane elastomer prepared at 90.degree. C. in N,N-dimethylformamide containing 1 percent of di-n-butylamine measured against polymethyl methacrylate (PMMA) as standard, displays a signal occurring in addition to low molecular weight main signal and comprising one or more peaks at an (apparent) molar mass of greater than 250,000 g/mol which becomes smaller or disappears on addition of lithium chloride to this solution, and a urea content of from 14 to 18% by weight.A process is also provided for preparing such a microcellular PU elastomer having improved dynamic mechanical properties. The microcellular PU elastomers can be used for producing damping elements.
Abstract: A stable dispersion of melamine in polyol components comprising at least one relatively high molecular weight compound containing at least two reactive hydrogen atoms and, if desired, low molecular weight chain extenders and/or crosslinkers, blowing agents, catalysts, flame retardants and also further auxiliaries and/or additives is prepared by using the melamine in combination with at least one amine and at least one organic and/or modified organic isocyanate. Such a dispersion can be used for producing flame-resistant polyurethane foams.
Type:
Grant
Filed:
August 23, 1999
Date of Patent:
March 7, 2000
Assignee:
BASF Aktiengesellschaft
Inventors:
Peter Falke, Regina Hendreich, Michael Reichelt
Abstract: In a process for producing foams based on polyisocyanate polyaddition products by reacting isocyanates with compounds which are reactive toward isocyanates and have a molecular weight of from 400 to 8000 in the presence of blowing agents, catalysts and, if desired, chain extenders and/or crosslinkers having a molecular weight of <400, auxiliaries and/or additives, use is made of isocyanates having isocyanurate and/or biuret structures, at least one compound which is reactive toward isocyanates, has a molecular weight of from 400 to 8000 and contains at least 50% primary hydroxyl groups, as catalysts at least one tertiary amine and at least one metal salt plus from 0.5 to 5.3% by weight of water, based on the weight of the compounds which are reactive toward isocyanates and have a molecular weight of from 400 to 8000, and the reaction is carried out at >40.degree. C.
Type:
Grant
Filed:
October 21, 1998
Date of Patent:
February 29, 2000
Assignee:
BASF Aktiengesellschaft
Inventors:
Dietrich Scherzer, Ulrich Treuling, Jurgen Mertes, Rolf Illguth
Abstract: The invention relates to compositions and method for producing energy absorbing, water blown, rigid polyurethane foams. The resulting polyurethane foams are low density, predominately open celled foams which exhibit a relatively constant consistency of compressive strength over deflectors. Such foams are suitable as lightweight alternatives to traditional energy absorbing applications.
Type:
Grant
Filed:
October 21, 1997
Date of Patent:
February 22, 2000
Assignee:
BASF Corporation
Inventors:
Lori R. Everitt, Richard P. Harrison, Vechelle R. Onufrak
Abstract: Thus, there is provided according to the present invention polyol compositions comprising(A) a polytetramethylene ether glycol, and(B) a difunctional active hydrogen compound-initiated polyoxyalkylene polyether polyol having a degree of unsaturation of not greater than 0.04 milliequivalents per gram of said polyether polyol.
Type:
Grant
Filed:
July 30, 1997
Date of Patent:
February 1, 2000
Assignee:
BASF Corporation
Inventors:
Thomas L. Fishback, Curtis J. Reichel, Thomas B. Lee
Abstract: The present invention relates to polyurethane foams employing an imidazole compound having enhanced substrate adhesion characteristics at relatively low mold temperatures. Additionally, the present invention relates to resin compositions employed in the polyurethane foams and methods of producing polyurethane foams employing the resins.
Abstract: A process for producing pipes insulated with foams comprises providing, between an inner carrier pipe and an outer pipe arranged parallel thereto, a holder which is provided with at least one aperture and is mounted so that it can be moved axially and positions the carrier pipe in the outer pipe and introducing into the vacant space between the two pipes, via the aperture(s) in the holder, a mixture for the preparation of foams, where during the introduction of the mixture, the holder moves in an axial direction with respect to the outer pipe and the carrier pipe, then after the mixture is charged, it is reacted to give the foam and the holder and, if desired, the outer pipe are removed.
Abstract: It has been found that non-chlorinated pentafluoropropane blowing agents may be used alone or in combination with water in a method of making flexible integral skin foams. For example, foams prepared using 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. The method of the the present invention produce foams which are suitable for use in many applications including, for example, shoe soles.
Type:
Grant
Filed:
December 30, 1997
Date of Patent:
January 4, 2000
Assignee:
BASF Corporation
Inventors:
Valeri L. Valoppi, Elizabeth S. Bredeson
Abstract: Disclosed are compositions having as the polymeric component a blend of from about 55 to about 85% by weight of a rubber modified polystyrene and from about 45 to about 15% by weight of at least one thermoplastic styrenic block copolymer. The thermoplastic styrenic block copolymer has a styrene content of at least about 70% by weight.
Type:
Grant
Filed:
February 11, 1997
Date of Patent:
January 4, 2000
Assignee:
BASF Corporation
Inventors:
Holly L. Perkins, Raymond W. Wilson, Sr.
Abstract: Sheet-like polyurethane moldings are produced by impregnation of porous sheets with a prepolymer containing free isocyanate groups and reversibly blocked isocyanate-reactive groups or containing free isocyanate-reactive groups and reversibly blocked isocyanate groups, and subsequent reaction of the prepolymers in a heated mold.
Type:
Grant
Filed:
May 5, 1997
Date of Patent:
December 28, 1999
Assignee:
BASF Aktiengesellschaft
Inventors:
Dietrich Scherzer, Ludwig Jung, Bernd Bruchmann, Hans Renz
Abstract: Thus, there is provided according to the present invention polyol compositions comprising(A) a polytetramethylene ether glycol, and(B) a difunctional active hydrogen compound-initiated polyoxyalkylene polyether polyol having a degree of unsaturation of not greater than 0.04 milliequivalents per gram of said polyether polyol.
Type:
Grant
Filed:
July 10, 1996
Date of Patent:
December 7, 1999
Assignee:
BASF Corporation
Inventors:
Thomas L. Fishback, Curtis J. Reichel, Thomas B. Lee
Abstract: The flameproofed, rigid, isocyanate-based foams, in particular rigid polyurethane and polyisocyanurate foams, are produced by reactinga) organic and/or modified organic polyisocyanates withb) at least one relatively high-molecular-weight compound containing at least two reactive hydrogen atoms, and, if desired,c) low-molecular-weight chain extenders and/or crosslinking agents, in the presence ofd) blowing agents,e) catalysts,f) flameproofing agents, and, if desired,g) further auxiliaries and/or additives,wherein the flameproofing agent is a combination of at least one liquid flameproofing agent which is reactive toward isocyanates and at least one solid flameproofing agent.
Type:
Grant
Filed:
October 29, 1997
Date of Patent:
November 9, 1999
Assignee:
BASF Aktiengesellschaft
Inventors:
Uwe Keppeler, Werner Hinz, Michael Reichelt
Abstract: In a process for reducing the primary amine content of a composition comprising at least one polyol, in which a composition comprising at least one polyol is admixed with at least one isocyanate which contains only secondary and/or tertiary, aliphatically bound isocyanate groups, isocyanate is added in an amount of up to 5% by weight, based on the total composition, and a polyol preparation is obtained.
Type:
Grant
Filed:
August 19, 1998
Date of Patent:
October 19, 1999
Assignee:
BASF Aktiengesellschaft
Inventors:
Bernhard Naber, Michael Gassan, Thomas Schupp, Sarbananda Chakrabarti