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| Number | Title | Issue Date |
| 8110704 | Process for the production of stable polymers Stable NCO prepolymers are produced from polyisocyanates having a melting point greater than 70° C., preferably, naphthalene diisocyanate, having advantageous physical properties. An important feature of the process of the present invention is the rapid cooling of ... | 02/07/2012 |
| 7339020 | High-functionality polyisocyanates High-functionality polyisocyanates are prepared by a process which comprises (i) preparation of an addition product (A) which contains one group which is reactive toward isocyanate and at least two isocyanate groups by reacting | 03/04/2008 |
| 7297752 | Method for catalytic dimerization of isocyanates The invention concerns a method for preparing polyisocyanates by cyclodimerization of isocyanate functions borne by initial monomer isocyanates. The invention is characterised in that it comprises steps which consist in: a) providing a reaction medium comprising ini... | 11/20/2007 |
| 7253321 | Process for the preparation of polyamines of the diphenylmethane series at a low degree of protonation The invention provides a process for the preparation of polyamines of the diphenylmethane series. This process comprises a) reacting aniline and formaldehyde in a molar ratio of 1.5:1 to 6:1, in the presence of an acid catalyst at ... | 08/07/2007 |
| 7230130 | Process for preparing methylenedianiline and methylenebis (phenylisocyanate) A process for preparing methylenedianiline by reacting aniline with formaldehyde in the presence of acid catalysts comprising, in a semicontinuous process, introducing aniline with or without acid catalyst, feeding formaldehyde with or without acid catalyst through ... | 06/12/2007 |
| 7199207 | Neutral-coloured 1K polyurethane adhesive A polyurethane prepolymer obtainable by reacting at least one aromatic polyisocyanate having symmetrical substitution of NCO groups and at least one aromatic polyisocyanate having asymmetric substitution of NCO groups, the fraction of aromatic polyisocyanate having ... | 04/03/2007 |
| 7129312 | Adhesion promoters for monomer-free reactive polyurethanes Polyurethane compositions are produced in a two-stage method. In a first step, a diol component with a molecular weight of less than 2000 is reacted with a monomeric diisocyanate with a molecular weight of less than 500 and the unreacted monomeric diisocyanate is re... | 10/31/2006 |
| 7084138 | Active ingredient combinations with insecticidal and acaricidal properties The invention relates to novel active compound combinations having very good insecticidal and acaricidal properties and containing (a) cyclic ketoenols having the formula in which the gro... | 08/01/2006 |
| 7038002 | Production of mixtures of diisocyanates and polyisocyanates from the diphenylmethane series with high contents of 4,4′-methylenediphenyl diisocyanate and 2,4′-methylenediphenyl diisocyanate A fraction of diisocyanates of the diphenylmethane series containing at least 95 wt. % binuclear methylenediphenyl diisocyanate is obtained by a) reacting aniline and formaldehyde in the presence of an acid catalyst to produce diamines and polyamines of... | 05/02/2006 |
| 6949672 | Method for producing arylsulphonic acid isocyanates The present invention relates to a process for preparing arylsulfonyl isocyanates by reacting an arylsulfonamide with phosgene in the presence of a catalytically effective amount of an alkyl isocyanate. ... | 09/27/2005 |
| 6831192 | Process for preparing methylenedianiline and methylenebis(phenyl isocyanate) A process for preparing methylenedianiline by reacting aniline with formaldehyde in the presence of acid catalysts comprising, in a semicontinuous process, introducing aniline with or without acid catalyst, feeding formaldehyde with or without acid catalyst through ... | 12/14/2004 |
| 6777524 | Polyether polyurethane Disclosed is a polyether polyurethane comprising (A) at least one polyisocyanate having two or more isocyanate groups, which is selected from the group consisting of an aromatic polyisocyanate and an aliphatic polyisocyanate; (B) a polyoxytetramethylene glycol (PTMG... | 08/17/2004 |
| 6750367 | Tetralin isocyanates The present invention relates to novel aromatic isocyanates obtained by partially hydrogenating naphthalene as well as the processes for preparing the same, and to their use as an isocyanate component in the production of polyurethanes. ... | 06/15/2004 |
| 6673970 | Process for preparing methylene diphenylamines by partial neutralization of acidic methylene diphenylamines Disclosed herein is a process for preparing a reaction product containing methylene diphenylamine, comprising reacting aniline and formaldehyde in the presence of an acid catalyst wherein the acid level of the resulting reaction mixture is reduced during ... | 01/06/2004 |
| 6667413 | Uracil compounds and use thereof The present invention relates to an uracil compound of the formula [I]: ##STR1## wherein W represents oxygen, sulfur, imino or C1 to C3 alkylimino; Y represents oxygen, sulfur, imino or C1 to C3 alkylimino; R | 12/23/2003 |
| 6576788 | METHOD FOR PRODUCING MIXTURES CONSISTING OF DIPHENYLMETHANE DIISOCYANATES AND POLYPHENYLENE-POLYMETHYLENE-POLYISOCYANATES CONTAINING A REDUCED AMOUNT OF CHLORINATED SECONDARY PRODUCTS AND WITH A REDUCED IODINE COLOR INDEX In a process for preparing mixtures of diphenylmethane diisocyanates and polyphenylpolymethylene polyisocyanates having a reduced content of chlorinated by-products and a reduced iodine color number by two-stage reaction of the corresponding mixtures of d... | 06/10/2003 |
| 6569352 | Phthalic anhydride based polyester-ether polyols and urethane prepolymers produced therefrom Disclosed are polyester-ether polyols and their use in urethane prepolymers, urethane foams and non-foam urethane coatings, adhesives, sealants and/or elastomers. Methods for producing such polyester-ether polyols are disclosed, along with methods for pro... | 05/27/2003 |
| 6515164 | Low monomer polyurethane prepolymer and process therefore A low-monomer PU prepolymer containing free NCO groups which is obtained from polyhydric alcohols and diisocyanates differing in their reactivity and which is distinguished by the ratio of the NCO groups of the partly slower-reacting diisocyanate to the N... | 02/04/2003 |
| 6433219 | Method for the production of methylenedi(phenylamine and methylenedi(phenyl isocyanate) A process for preparing methylenedianiline by reacting aniline with formaldehyde in the presence of acid catalysts comprising, in a semicontinuous process, introducing aniline with or without acid catalyst, feeding formaldehyde with or without acid cataly... | 08/13/2002 |
| 6410095 | Solvent-free binder compositions and their use in one- and two-component coating compositions The present invention relates to substantially solvent-free binder compositions containing a) a polyisocyanate component containing heteroallophanate groups and having aromatically-bound isocyanate groups, i) an NCO content of 3 to 16%, ii) an average function... | 06/25/2002 |
| 6313060 | Catalyst for ring-opening polymerization of alkylene oxide, method for preparation thereof and use thereof A resilient polyurethane foam produced by using a polyether polyol produced by reacting alkylene oxides with a polyhydroxy compound having at least 2 hydroxyl groups as an initiator in the presence of the catalyst for alkylene oxide ring-opening polymeriz... | 11/06/2001 |
| 6057269 | Benzylhydroxylamines and intermediates used to prepare them Benzylhydroxylamines I ##STR1## (X=--N(R7)--O--; Y=O, S; R1 =halogen, CN, NO2, CF3 ; R2 =H, halogen; R3 =H, NH2, CH3 ; R4 =H, halogen, C1 -C... | 05/02/2000 |
| 6036879 | Viscosity-stable isocyanate-terminated prepolymers and polyoxyalkylene polyether polyols having improved storage stability Polyoxyalkylene polyols containing double metal cyanide complexes or residues thereof as are produced during the preparation of polyoxyalkylene polyols by the double metal cyanide complex catalyzed oxyalkylation of a suitably functional hydric initiator a... | 03/14/2000 |
| 6013606 | Substituted cinnamic oxime and hydroxamide derivatives Substituted cinnamic oxime derivatives I and cinnamic hydroxamide derivatives II ##STR1## (R1= halogen, NO2, CN, CF3 ; R2 =H, halogen; R3= H, halogen, C1 -C6 -alkyl, C1... | 01/11/2000 |
| 5981789 | Preparation of nuclear chlorinated aromatic compounds Disclosed is a method of preparing an aromatic compound having the general formula ##STR1## where R is CF3, OCF3, OC2 F5, CN, NCO, or COCl, m is 0, 1, or 2, n is 0, 1, or 2, q is 1 or 2, and q+m+n is an int... | 11/09/1999 |
| 5919888 | Viscosity-stable isocyanate-terminated prepolymers and polyoxyalkylene polyether polyols having improved storage stability Polyoxyalkylene polyols containing double metal cyanide complexes or residues thereof as are produced during the preparation of polyoxyalkylene polyols by the double metal cyanide complex catalyzed oxyalkylation of a suitably functional hydric initiator a... | 07/06/1999 |
| 5905151 | Trimer catalyst for aliphatic and aromatic isocyanates This invention relates to a process for trimerizing organic polyisocyanates in the presence of thermally active catalyst systems. The catalyst systems comprise (a) compounds selected from the group consisting of 1) lithium salts of aliphatic or aromatic c... | 05/18/1999 |
| 5902459 | Recovery of products from toluenediisocyanate residues There is now provided a method of recycling toluenediisocyanate residue resulting from the production of toluenediisocyanate by the reaction of toluenediamine by phosgenation in the presence of a solvent. In accordance with the teachings of the present in... | 05/11/1999 |
| 5874507 | Polyepichlorohydrin-based tri-block additive for surface modification of polymer films and articles The specification discloses a method and additive for increasing the surface activity of non-polar polymeric materials, and a non-polar polymeric material exhibiting increased surface activity. The invention employs an additive of the formula A-B-A1 | 02/23/1999 |
| 5821316 | Polyurethane prepolymers for making elastomers having improved dynamic properties An isocyanate-terminated polyurethane prepolymer comprising the reaction product of a polyisocyanate and a polyol composition consisting essentially of a polyether polyol of 350-2000 equivalent weight and a low molecular weight polyol of 62 to | 10/13/1998 |
| 5798409 | Reactive two-part polyurethane compositions and optionally self-healable and scratch-resistant coatings prepared therefrom The present invention relates to two-part reactive polyurethane compositons and the cured coatings prepared therefrom. The invention also relates to particular compositions and cured coatings therefrom that exhibit high damping character, excellent scratc... | 08/25/1998 |
| 5770763 | Difunctional bitricyclodecatriene monomers Novel difunctionalized cyclobutabenzene monomers of the general formula: ##STR1## wherein Z can be hydrogens or a cyclobutane ring; and X and Y are carboxyl, amino, alcohol, isocyanate, acid halide, or bis-acyl halide groups. Exemplary difunctional b... | 06/23/1998 |
| 5747628 | Polyisocyanates containing ether and urethane groups, a process for their preparation and their use in the production of polyurethane lacquers Polyisocyanates based on polyhydroxy polyethers and tolylene diisocyanate containing ether and urethane groups and having an isocyanate group content of from 11.8 to 14.4% by weight, an average isocyanate functionality of from 3.1 to 4.0 and a free tolyle... | 05/05/1998 |
| 5710191 | Hydroxymethyl quinuclidine catalyst compositions for making polyurethane foams A method for preparing a polyurethane foam which comprises reacting an organic polyisocyanate and a polyol in the presence of a blowing agent, a cell stabilizer and a catalyst composition comprising at least one compound of either of the following formula... | 01/20/1998 |
| 5693686 | Foam-forming mixtures with decreased decomposition of hydrohalocarbon blowing agents A polyisocyanate having an acid value of at least 0.01% HCl is used to produce polyisocyanate, polyisocyanurate and polyurethane urea foams with an HCFC blowing agent. The use of such a polyisocyanate is advantageous because the polyisocyanate does not ca... | 12/02/1997 |
| 5691441 | Spandex elastomers Substitution of from 5 to 50 equivalent percent of an ultra-low unsaturation polyoxypropylene diol for PTMEG in isocyanate-terminated prepolymers used in spandex production is found to lower considerably both prepolymer viscosity and hysteresis while subs... | 11/25/1997 |
| 5677412 | Preparation of poly(ether-urethanes) from cyclic ethers and organic isocyanates Poly(ether-urethanes) can be made from cyclic ethers and organic isocyanates by using selected metal compounds as catalysts. Polymers useful as thermoplastic elastomers, spandex fibers or urethane rubbers can be made by reacting diisocyanates containing f... | 10/14/1997 |
| 5654479 | 4-substituted bis(2,6-diisopropylphenyl)-carbodiimides, their preparation, their use, and 4-substituted 2,6-diisopropylphenyl isocyanates which can be used for their preparation 4,4'-disubstituted bis(2,6-diisopropylphenyl)carbodiimides of the formula (I) ##STR1## where R is 1-methyl-1-phenylethyl, phenoxy or tert-butyl, a process for their preparation, their use as stabilizers against hydrolytic degradation of polyaddi... | 08/05/1997 |
| 5621138 | 4-substituted bis (2,6-diisopropylphenyl)- carbodiimides, their preparation, their use, and 4-substituted 2,6-diisopropylphenyl isocyanates which can be used for their preparation 4,4'-disubstituted bis-(2,6-diisopropylphenyl)carbodiimides of the formula (I) ##STR1## where R is 1-methyl-1-phenylethyl, phenoxy or tert-butyl, a process for their preparation, their use as stabilizers against hydrolytic degradation of polyadd... | 04/15/1997 |
| 5606004 | Lacquer polyisocyanates with aliphatically and aromatically bound isocyanate groups A process for preparing liquid lacquer polyisocyanates with aliphatically and aromatically bound isocyanate groups and an NCO content of 5 to 25 wt. % by trimerizing an isocyanate component A), containing A1) 70 to 100 wt. % of diisocyanatotoluene and A2)... | 02/25/1997 |
