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| Number | Title | Issue Date |
| 4996359 | Process for the preparation of aromatic bis dialkyl ureas Aromatic bis (dialkyl) ureas such as the bis (dimethyl) urea of 2,4-toluenediamine are prepared by reacting an aromatic diamine with isocyanic acid (HNCO) to convert the amino groups of the diamine to urea groups (--NHCONH2) to give an aromatic... | 02/26/1991 |
| 4983329 | Preparation of esterified propoxylated glycerin from free fatty acids A novel method is provided for the preparation of a esterified propoxylated glycerin having food grade quality by reacting at temperatures of from about 100° C. to about 250° C. a propoxylated glycerin having from 2 to 100 oxypropylene oxide units per g... | 01/08/1991 |
| 4978779 | Preparation of methylene diphenylene diisocyanates and polymethylene polyphenylene poly (isocyanates) using an organic sulfonic acid promoter An improved process is provided for the preparation of methylene diphenylene diisocyanates (MDI) and polymethylene polyphenylene poly (isocyanates) (PMDI) by the thermal decomposition of a methylene diphenylene bis (dialkylurea) or a polymethylene polyphe... | 12/18/1990 |
| 4965038 | Laminated composite of a rigid polyurethane modified polyisocyanurate substrate an metal, plastic, cellulose, glass, ceramic or combinations thereof Laminated composites including method for the preparation thereof comprising forming in combination in a mold at least one layer of a rigid polyurethane modified polyisocyanurate by reacting in said mold, a reaction mixture of an organic di- or polyisocya... | 10/23/1990 |
| 4886700 | Laminated composite of a rigid polyurethane modified polyisocyanurate substrate and metal, plastic, cellulose, glass, ceramic or combinations thereof Laminated composites including method for the preparation thereof comprising forming in combination in a mold at least one layer of a rigid polyurethane modified polyisocyanurate by reacting in said mold, a reaction mixture of an organic di- or polyisocya... | 12/12/1989 |
| 4883908 | Process for the preparation of aromatic isocyanates from dialkyl ureas using an organic sulfonic acid promoter An improved process is provided for the preparation of aromatic mono- and poly-isocyanates by the thermal decomposition of an aromatic bis dialkyl urea in solvent in the presence of an organic sulfonic acid or sulfonated aromatic ion exchange resin as a p... | 11/28/1989 |
| 4879164 | Laminated composite of a rigid polyisocyanurate substrate and metal, plastic, cellulose, glass, ceramic or combinations thereof Laminated composites including methods for the preparation thereof comprising forming in combination in a mold at least one layer of a rigid polyisocyanurate by reacting in said mold a reaction mixture of an organic di- or polyisocyanate and a cyclic alky... | 11/07/1989 |
| 4873364 | Process for the preparation of methylene diphenylene diisocyanates and polymethylene polyphenylene poly (diisocyanates) An improved process is provided for the preparation of methylene diphenylene diisocyanates (MDI) and polymethylene polyphenylene poly (diisocyanates) by the thermal decomposition of a methylene diphenylene bis (dialkylurea) or a polymethylene polyphenylen... | 10/10/1989 |
| 4871871 | Process for the preparation of aromatic mono- and polyisocyanates An improved process is provided for the preparation of aromatic mono- and poly- isocyanates by the thermal decomposition of an aromatic bis dialkyl urea in solvent in the presence of a tertiary amine hydrohalide, such as pyridine hydrochloride, as a promo... | 10/03/1989 |
| 4800058 | Method for the preparation of rigid cast or transfer molded thermoset polyurethane modified polyisocyanurate compositions A method for the preparation of cast or transfer molded rigid polyurethane modified polyisocyanurate polymer composition by conveying from a mixing chamber into a mold cavity of desired configuration to react at temperatures of from about ambient to about... | 01/24/1989 |
| 4757123 | Method for the preparation of rigid cast or transfer molded thermoset polyisocyanurate compositions A method for the preparation of cast or transfer molded rigid polyisocyanurate polymer composition by conveying from a mixing chamber into a mold cavity of desired configuration to react at temperatures of from about ambient to about 140° C. a reaction m... | 07/12/1988 |
| 4742144 | Copolymeric composition of a functional polysiloxane and a carboxylic acid or salt thereof An improvement is provided in the compression molding of lignocellulosic composite articles, such as particle or flake board, in which polyisocyanate binder systems are employed, the improvement being the provision of a novel copolymeric reaction product ... | 05/03/1988 |
| 4740575 | Terpolymer composition comprising a functional polysiloxane, an isocyanate and a mono-carboxylic acid or salt thereof An improvement is provided in the compression molding of lignocellulosic composite articles, such as particle or flake board, in which polyisocyanate binder systems are employed, the improvement being the provision of a novel functional polysiloxane-hydro... | 04/26/1988 |
| 4731427 | Method for the preparation of rigid reaction injection molded thermoset polyurethane modified polyisocyanurate compositions A method for the preparation of a molded reaction injection molded rigid polyurethane modified polyisocyanurate polymer composition by injecting at least two streams into the mold cavity of a RIM machine to react at temperatures of from about ambient to a... | 03/15/1988 |
| 4711910 | Preparation of fire retardant flexible polyester based polyurethane foams having reduced discoloration and scorch Fire retardant flexible polyurethane foams are prepared with reduced scorch and discoloration by the addition of a stabilizing amount of from about 1 to about 12 parts by weight of a cyclic alkylene carbonate to the formulation, based on the weight of the... | 12/08/1987 |
| 4709002 | Method for the preparation of rigid non-cellular reaction injection molded thermoset polyisocyanurate compositions A method for the preparation of a molded reaction injection molded rigid non-cellular polyisocyanurate polymer composition by injecting at least two streams into the mold cavity of a RIM machine to react at temperatures of from about ambient to about 140Â... | 11/24/1987 |
| 4705866 | Synthesis of N-halogenated phenyl maleimide compounds with tin containing catalysts A process for the preparation of N-brominated or N-chlorinated phenylmaleimide by reacting maleic anhydride and a brominated or chlorinated aniline compound at temperatures of from about 100° C. to about 210° C. in the presence of tin containing catalys... | 11/10/1987 |
| 4658062 | Amine terminated polybutadiene compositions and preparation thereof Novel amine terminated polybutadiene compounds of the formula: ##STR1## wherein R is hydrogen, a straight or branched chain alkyl group containing from 1 to 10 carbon atoms or a substituted or unsubstituted aryl or aralkyl group containing one or mor... | 04/14/1987 |
| 4621105 | Preparation of fire retardant flexible polyurethane foams having reduced discoloration and scorch Fire retardant flexible polyurethane foams are prepared with reduced scorch and discoloration by the addition of a stabilizing amount of from about 1 to about 12 parts by weight of a cyclic alkylene carbonate to the formulation, based on the weight of the... | 11/04/1986 |
| 4593128 | Stabilized polyhydroxybutadiene compounds Polyhydroxybutadiene compounds are storage stabilized against reactivity changes by incorporating therein an effective amount of a di or triphenyl phosphine compound of the formula ##STR1## wherein each x is hydrogen, a halogen or an alkyl or alkoxy ... | 06/03/1986 |
| 4581384 | Method of producing a polyurethane foam from a polyol containing an unsaturated polyester and a polyisocyanate containing a vinylidene monomer A method for producing polyester modified, polyurethane foam having a density of from about 1 to 40 pounds per cubic foot, and the product produced by said method, are disclosed and claimed. A first composition or mixture is prepared comprising a relative... | 04/08/1986 |
| 4568702 | Method for the preparation of semi-rigid polyurethane modified polyurea foam compositions Polyurethane modified polyurea foams having a finer cell structure and an increased volume of finished product are prepared by reacting crude organic di- or polyisocyanates with a mixture of polyether polyols and an alkylene or dialkyl carbonate in the pr... | 02/04/1986 |
| 4544453 | Stripping of unreacted glycol ethers and acids from an esterification reaction mixture An improved method of stripping unreacted alkylene glycol monoalkyl ethers and unreacted monocarboxylic or halogenated monocarboxylic acids from a mixture containing the monocarboxylic acid ester prepared therefrom by acid catalyzed esterification without... | 10/01/1985 |
| 4543419 | Process for the preparation of diphenylmethane dicarbamates and polymethylene polyphenyl carbamates Diphenylmethane dicarbamates and polymethylene polyphenyl carbamate homologs and derivatives of these compounds are produced by the acid catalyzed condensation of an N-aryl carbamic acid ester, such as ethylphenylcarbamate, with a carbonyl compound, such ... | 09/24/1985 |
| 4533754 | Preparation of aldehydes from aryl acid halides and organozinc compounds with complex palladium catalysts A process for the preparation of aldehydes of the formula ##STR1## wherein R is a substituted or unsubstituted aryl group containing one or more benzenoid rings which comprises reacting an aryl acid halide with an organozinc compound in solvent in th... | 08/06/1985 |
| 4528154 | Preparation of molded lignocellulosic compositions using an emulsifiable polyisocyanate binder and an emulsifiable carboxy functional siloxane internal release agent A binder system is provided for the preparation of lignocellulosic composite molded articles, such as flake or particle board, which incorporates an internal release agent and comprises an emulsifiable organic di- or polyisocyanate and an emulsifiable car... | 07/09/1985 |
| 4518770 | Process for the preparation of polyhydroxybutadienes An improved process is provided for the preparation of polyhydroxybutadienes (hydroxy-containing butadiene homopolymers) which comprises injecting an aqueous solution of alkali metal sulfite or bisulfite into the polyhydroxybutadiene solvent recovery sect... | 05/21/1985 |
| 4501915 | Preparation of N-alkyl-monosubstituted carbamates An improved process for the preparation of N-alkyl-monosubstituted carbamates by reacting an aliphatic primary amine, urea and a monohydric aliphatic alcohol in the presence of a strongly basic tertiary amine catalyst and optionally an inert solvent.... | 02/26/1985 |
| 4495321 | Polyimide and/or polyamide-imide compositions in mixed solvents Improved polyimide and/or polyamide-imide coating compositions are provided for use as magnet wire coatings which comprise a polyimide and/or polyamide-imide polymer and a co-solvent mixture of N-methyl pyrrolidone and acetophenone the solids content of t... | 01/22/1985 |
| 4486557 | Organic polyisocyanate-liquid aromatic epoxide-lignin adhesive binder compositions An adhesive binder composition is provided for the preparation of lignocellulosic composite molded articles such as flake or particle board, made from moldable compositions which comprises an organic di- or polyisocyanate a liquid aromatic epoxide and lig... | 12/04/1984 |
| 4468523 | Synthesis of dialkyl oxalates by the heterogeneously catalyzed oxidative carbonylation of alcohols Synthesis of dialkyl oxalates by the oxidative carbonylation of liquid monohydric saturated alcohols of from 1 to 20 carbon atoms with carbon monoxide and oxygen or an oxygen-containing gas in the presence of a catalytic amount of a catalyst comprising pa... | 08/28/1984 |
| 4454342 | Preparation of dialkyl oxalates using a heterogeneous Pd-V-P catalyst for the oxidative carbonylation of alcohols Synthesis of dialkyl oxalates by the heterogeneous catalyzed oxidative carbonylation of liquid monohydric saturated alcohols of from 1 to 20 carbon atoms with carbon monoxide and oxygen or an oxygen-containing gas in the presence of a catalytic amount of ... | 06/12/1984 |
| 4451666 | Synthesis of oxalate esters by the oxidative carbonylation of alcohols with a heterogeneous manganese promoted Pd-V-P catalyst Synthesis of dialkyl oxalates by the heterogeneous catalyzed oxidative carbonylation of liquid monohydric saturated alcohols of from 1 to 20 carbon atoms with carbon monoxide and oxygen or an oxygen-containing gas in the presence of a catalytic amount of ... | 05/29/1984 |
| 4450293 | Preparation of -hydroxyisobutyric acid using a thallic halide catalyst A process for the preparation of -hydroxyisobutyric acid by the catalytic oxidation of isobutyric acid with oxygen in an aqueous solution in the presence of a TlCl3 or TlBr3 catalyst and a Cu, Sn, or Fe halide compound as a re... | 05/22/1984 |
| 4448985 | Oxidation of isobutyric acid to alpha-hydroxyisobutyric acid A process for the preparation of alpha-hydroxyisobutyric acid by the stoichiometric oxidation of isobutyric acid in aqueous solution at temperatures of from about 50° C. to 200° C. in the presence of a thallic (Tl+3) salt.... | 05/15/1984 |
| 4447639 | Oxidative carbonylation of alcohols to dialkyl oxalates using a heterogeneous iron promoted Pd-V-P catalyst Synthesis of dialkyl oxalates by the heterogeneous catalyzed oxidative carbonylation of liquid monohydric saturated alcohols of from 1 to 20 carbon atoms with carbon monoxide and oxygen or an oxygen-containing gas in the presence of a catalytic amount of ... | 05/08/1984 |
| 4447638 | Preparation of dialkyl oxalates by the oxidative carbonylation of alcohols with a heterogeneous Pd-V-P-Ti containing catalyst system Synthesis of dialkyl oxalates by the heterogeneous catalyzed oxidative carbonylation of liquid monohydric saturated alcohols of from 1 to 20 carbon atoms with carbon monoxide and oxygen or an oxygen-containing gas in the presence of a catalytic amount of ... | 05/08/1984 |
| 4444676 | Stabilized polyoxyalkylene polyether polyols and polyurethane foams prepared therefrom Polyoxyalkylene polyether polyols are stabilized against oxidative degradation by incorporating therein a synergistic stabilizing composition containing (1) a mixture of butylated phenols consisting of 2-tertiary butyl phenol, 3,5-ditertiary butyl-4-hydro... | 04/24/1984 |
| 4414361 | Organic polyisocyanate-cyclic alkylene carbonate adhesive binder compositions An improved adhesive binder composition is provided for the preparation of lignocellulosic composite molded articles such as flake or particleboard, made from moldable compositions which comprises an organic di- or polyisocyanate and a cyclic alkylene est... | 11/08/1983 |
| 4401634 | Two step process for the preparation of zeolite A by hydrothermal treatment of clinoptilolite A two step hydrothermal process for the preparation of zeolite A from clinoptilolite by (1) heat treating a mixture of clinoptilolite in an aqueous solution of sodium hydroxide and filtering the mixture followed by (2) reacting the filtrate with at least ... | 08/30/1983 |
