Matches 201 - 250 out of 510 < 1 2 3 4 5 6 7 8 9 10 11 >
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5126476 Process for the preparation of aryl-, heteroaryl-, or cycloalkyl-substituted alkyl urethanes and isocyanates  
A process for making aryl-, heteroaryl-, or cycloalkyl-substituted alkyl urethanes is disclosed. The urethanes are prepared by electrophilic carbamylation of aromatic compounds with alkylene...
5120759 Tetrahydronaphthalene derivatives for improving short-term memory  
Novel compounds of the formula ##STR1## wherein R 1 is lower-alkyl, lower-alkoxy-lower-alkyl, lower-alkylthio-lower-alkyl or furyl, R 2 is lower-alkyl, phenyl-lower-alkyl or...
5117036 Preparation of aromatic carbamates  
Aromatic carbamates are selectively and actively prepared by reacting (a) at least one nitroaromatic compound with (b) carbon monoxide and (c) at least one organic compound bearing at least one...
5110986 Synthesis of N-t-alkyl-1,2-diacylhydrazines  
This application relates to a process for preparing a N-t-alkyl-1,2-diacylhydrazine by reacting a 1,3,4-oxadiazole with a tertiary alkyl cation precursor in the presence of a strong acid catalyst....
5101062 Process for producing carbamic acid esters  
A process for producing carbamic acid esters (N-phenyl carbamate) which comprises reacting an amino group-containing compound (aniline), oxygen, a nitro group-containing compound (nitrobenzene), a...
5093412 Macromers for graft polyols and the polyols prepared therefrom  
Macromers for use in preparing stable, low viscosity graft polymer polyols of high solids content are disclosed. These macromers are easily made in high yield with short cycle times, and may be...
5087727 A zulenes containing a urethane group  
Azulenesquaric acid dyes of the formula ##STR1## where L is substituted or unsubstituted C 1 -C 12 - alkylene, R 1 is C 1 -C 20 - alkyl, C 5 -C 7 - cycloalkyl or substituted or...
5087726 Carbamate ACAT inhibitors  
This invention relates to novel compounds which are ACAT inhibitors rendering them useful in lowering blood cholesterol levels. The compounds are carbamates represented by the general formula...
5079383 Method of condensing N-phenyl carbamates  
A process for producing 4,4'-diphenylmethane dicarbamates through one-stage condensation by reacting N-phenyl carbamates with a methylenating agent in presence of a zinc halide, as a catalyst....
5075491 Methine compounds containing ester group  
A composition useful for incorporation into polymer compositions employed for food packaging or the like comprising a bis- or tris-methine compound having the structural formula ##STR1## wherein A...
5072020 Aliphatic polyamines from polynitro compounds  
Disclosed is a novel route to diamines and triamines comprising reacting nitroalcohols with isocyanates to prepare di- and trinitro compounds which are subsequently reduced over a metal...
5068391 Preparation of methylenedi (phenylurethane)  
The bis-(N-carboalkoxyanilino)methanes, optionally in the presence of at least one alkyl N-phenylcarbamate, are selectively rearranged into methylenedi(phenylurethane), MDU, in the presence of an...
5066823 Preparation of 5-acylamino-2,4,6-triiodo- or tribromo-benzoic acid derivatives  
A process for the preparation of 5-acylamino-2,4,6-triiodo or tribromo-benzoic acid derivatives of formula (I), wherein X is I or Br, R is H or a variously substituted alkyl, or a group of formula...
5041545 2-hydroxybenzophenone hydrazides and derivatives thereof  
Hydrazide functionalized 2-hydroxybenzophenone ultraviolet light and heat stabilizers and derivatives are disclosed having the general formula: ##STR1## wherein R 1 , R 2 , R 3 , R 4 , R 5 , R 6 ,...
5019636 Polyester chain-extended vinyl ether urethane oligomers  
A vinyl ether oligomer especially useful for coatings is prepared by reacting an hydroxyl-terminated polyester, a diisocyanate, and a hydroxy monovinyl ether having formulas as defined herein.
5008435 Preparation of urethanes  
Process for producing urethanes, by reacting an organic hydroxyl group containing compound and carbon monoxide, either (i) with an organic nitro group containing compound, e.g. nitrobenzene, or...
4990649 Azulenesquaric acid dyes that contain urethane groups  
Azulenesquaric acid dyes of the formula ##STR1## where L is substituted or unsubstituted C 1 -C 12 -alkylene, R 1 is C 1 -C 20 -alkyl, C 5 -C 7 -cycloalkyl or substituted or unsubstituted...
4985587 Reaction products of p-vinylphenol and polyisocyanates  
Polyunsaturated compounds useful in radiation curable compositions are made by reacting p-vinylphenol and a polyisocyanate in the ratio of one mole of p-vinylphenol for each isocyanate group of the...
4973732 Polymer containing a polyisobutylene-derived backbone  
Polymers, such as polysiobutylene or ethylene-propylene copolymers, are functionalized by reaction with an activated imine to yield novel polymers.
4973733 Method of functionalizing polymers  
Polymers, such as polyisobutylene or ethylene-propylene copolymers, are functionalized by reaction with an activated imine to yield novel polymers.
4956474 Intermediates of cephalosporin compounds  
The present invention relates to novel cephalosporin derivatives, processes for preparing thereof, compositions for preventing and/or treating infectious diseases which comprise the novel...
4945117 Liquid polyisocyanate compositions, a process for their preparation, and their use for the preparation of flexible polyurethane foams  
This invention relates to liquid urethane-modified polyisocyanate compositions obtained by reaction of polyisocyanates or polyisocyanate mixtures of the diphenylmethane series containing from about...
4940811 N,N-disubstituted ureas and processes for their manufacture  
N,O-acylates, derived from N-acylated carbamic acids, of desferrioxamine B of the formula ##STR1## in which B represents a carbamoyl radical of the partial formula --CO--NH--Alk--CO--O--R a 1 (II)...
4939169 1,4-naphthalenediol and 1,4-hydroquinone derivatives  
Novel 1,4-naphthalenediol and 1,4-hydroquinone derivatives of formula I, II, III and IV and their therapeutic uses as 5-lipoxygenase inhibitors, leukotriene inhibitors, antiinflammatory and/or...
4925971 Method for producing aliphatic o-arylurethanes  
A method for producing aliphatic O-arylurethanes by the reaction of an aliphatic primary amine with an aromatic hydroxyl compound and urea. Ammonia produced as a by-product in the reaction is...
RE33211 Vinyl ether terminated urethane resins  
Vinyl ether terminated urethane resins may be prepared by reacting the product obtained by the addition of acetylene to an organic polyol with an isocyanate-containing compound at temperatures...
4921996 Isocyanato-acylurethanes, a process for their preparation and their use  
The present invention relates to isocyanto-acylurethanes corresponding to Formula I ##STR1## wherein R has a valency of m+n and is a hydrocarbon group, R' is a hydrocarbon group and m and n...
4879410 Preparation of primary aralkyl urethanes and ureas and isocyanates derived therefrom  
A process is disclosed for the preparation of aralkyl mono- and diurethanes or ureas by carbamylmethylation, or acid-catalyzed addition at a temperature of 40° C. to about 100° C. of formaldehyde...
4877540 Methylolated and optionally etherified urethanes containing fluoroalkyl ligands  
Methylolated and optionally etherified urethanes containing fluoroalkyl ligans with formaldehyde, with or witout subsequent etherification, and are in the form of their solutions or aqueous...
4876379 Oxidative alkoxycarbonylation of amines and amine derivatives  
The catalyzed oxidative alkoxycarbonylation of amines and substituted amines to form carbamates is disclosed. The process involves alkoxycarbonylation in the presence of a palladium-based catalyst...
4870203 Preparation of geminal dicarbamates  
Prepare α, β-saturated geminal biscarbamates by contacting an α,β-unsaturated ether with a carbamate under reaction conditions, optionally in the presence of a catalyst.
4870207 Synthesis of arphamenine A  
Known compound, optically active arphamenine A can now be synthesized in an optically active pure form and in a favorable yield by a new process comprising consecutive steps with starting from...
4863986 Fluorinated polyisocyanates suitable as paint components  
Fluorinated polyisocyanates particularly suitable for the formulation of coating paints and compositions in the electronics industry, obtained by starting from a perfluoropolyether polyol having a...
4855504 Process for producing higher molecular weight amino compounds having reduced monomeric amine content  
High molecular weight amines having reduced low molecular weight amine contents are obtained by reacting a mixture of (1) a high molecular weight amine and (2) a low molecular weight amine with (3)...
4851565 Catalyzed process for the preparation of an aliphatic, cycloaliphatic, arylaliphatic or aliphatic-cycloaliphatic di- or polyurethane  
Catalyzed processes for the preparation of aliphatic di- and polyurethanes from aliphatic di- or polyamines, urea, and monofunctional, aliphatic alcohols are disclosed which result in shorter...
4841090 Treatment of fibrous substrates, such as carpet, with fluorochemical  
Fluorochemical amine salt compounds containing one or more fluoroaliphatic radicals and one or more salt-forming amino groups which have cyanoalkyl groups as N-substituents groups, such compounds...
4835300 Fluorine containing urethane compounds  
A fluorine-containing urethane compounds represented by the formula ##STR1## wherein R f represents a perfluoroalkyl group having 4 to 20 carbon atoms; X represents --CH 2 CH(A)--, --C k H 2k ...
4816597 Dental restorative materials based upon blocked isocyanates  
Novel blocked diisocyanate monomers are provided. These monomers are useful for filling dental cavities, for cementing teeth and for general dental restorative procedures. Methods for preparing the...
4810820 Process for the production of polyisocyanates containing allophanate groups  
Aliphatic and/or cycloaliphatic polyisocyanates containing allophanate groups are produced by reacting (a) a di- and/or polyisocyanate with aliphatic and/or cycloaliphatic isocyanate groups with...
4806674 Preparation of urethanes by oxidative carbonylation of amines using copper carboxylates as oxidants  
A process for preparing urethanes by reacting a primary or secondary amine with carbon monoxide, an alcohol, a catalytic quantity of a compound or complex of palladium, platinum or rhodium and a...
4801644 Coating compositions  
Aqueous polyurethane dispersions useful as coating compositions wherein the polyurethane comprises the reaction product of (a) an isocyanate-terminated polyurethane prepolymer containing...
4792354 Water and oil repellent having excellent desoiling properties  
A water and oil repellent having excellent desoiling properties composed of a compound comprising at least two terminal segments and an intermediate segment connecting the terminal segments and...
4788287 High performance water and oil repellant  
A high performance water and oil repellant composed of a compound comprising at least two terminal segments and an intermediate segment connecting the terminal segments and having a molecular...
4781947 Sizing agent for carbon fibers  
A sizing agent for a carbon fiber comprized mainly of an unsaturated urethane compound produced by a reaction of an unsaturated alcohol with an isocyanate which is able to couple the carbon fiber...
4780127 Certain 2-(substituted benzoyl)-1,3-cyclohexanediones and their use as herbicides  
Compounds of the formula ##STR1## wherein R is halogen, C 1 -C 4 alkoxy, C 1 -C 4 alkyl, C 1 -C 4 haloalkyl, cyano, nitro, S(O) n R wherein R is C 1 -C 4 alkyl and n is the integer 0, 1 or...
4775732 Vinyl ether terminated ester and urethane resins from bis(hydroxyalkyl)cycloalkanes  
There are described vinyl ether terminated ester and urethane oligomers which cure or polymerize particularly rapidly, especially by cationic polymerization which is radiation induced in the...
4752338 (Meth)-acrylic acid esters  
(Meth)-acrylic acid esters of the formula ##STR1## in which R 1 and R 2 are each independently hydrogen, chlorine, fluorine or a C 1 - to C 4 -alkyl radical and R 3 and R 4 are identical...
4748265 Process for the preparation of herbicidally active phenyl carbamates  
Herbicidally active substituted phenyl carbamates I ##STR1## in which R 1 represents a C 1 -C 6 alkyl group, a C 3 -C 6 cycloalkyl group or an aryl group, which aryl group may be substituted...
4740610 Process for the preparation of N,o-substituted mono- and/or polyurethanes  
The invention describes a process for the preparation of N,o-substituted mono- and/or polyurethanes of formula R 1 [--NHCOOR 2 ] n , in which R 1 is an aliphatic, cycloaliphatic, aromatic,...
4740531 Polyaminohydroxyl compounds containing urethane and/or urea groups and processes for their preparation and use  
Polyaminohydroxyl compounds having molecular weights of from 200 to 20,000 and a functionality greater than 1 but less than or equal to 8 containing 0.165-16.5 wt. % amino and hydroxyl groups and...
Matches 201 - 250 out of 510 < 1 2 3 4 5 6 7 8 9 10 11 >