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4196148 |
Hydrolysis of polyurethane foams
A method for hydrolysis of polyurethane foam and recovery of diamines and polyethers (or polyesters) from the hydrolysate carried out near atmospheric pressure and temperatures above about 185° C....
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4191818 |
Process for preparing heat-resistant polyurethane elastomers having no secondary softening range
Polyurethane elastomers of improved heat stability are made by a process in which a polyisocyanate is reacted with a polyol of high molecular weight with an OH:NCO ratio of 1:0.66 to 1:0.85, and...
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4187074 |
Water-soluble cationic oligourethane resins and the use thereof for the treatment of pelts or leather
This invention relates to water-soluble, cationic hydrophilic oligourethanes free from isocyanate groups and containing methylol groups and to the use thereof for the tanning, pre-tanning or...
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4182825 |
Polyether based urethanes with superior dynamic properties
Hydroxy terminated polyethers are capped with toluene diisocyanate, and the amount of unreacted toluene diisocyanate substantially reduced. When cured with 4,4'-methylene-bis-(2-chloroaniline), the...
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4182826 |
Process for the production of rapid-set moldings
The present invention relates to a process for the production of moldings based on organic polyisocyanates which have short in-mold times. The polyisocyanates are subjected to a polymerization...
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4177342 |
Process for the preparation of polyisocyanates containing allophanate groups
This invention relates to a new process for the preparation of new organic polyisocyanates having at least three isocyanate groups and containing allophanate groups, to the polyisocyanates...
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4176239 |
Insulated electrical cable containing an agent for decontaminating and sealing the interior space thereof
This invention provides a method of sealing and purging contaminants from the internal free spaces of an insulated electrical device by forcing into said free spaces a low viscosity material that...
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4172192 |
Process for stabilizing thermoplastic polyurethanes and stabilized product
Thermoplastic polyurethanes are treated in the solid particulate state with a volatile free agent selected from alcohols and amines which are reactive with NCO groups at a temperature below that at...
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4170697 |
Process for the production of polyisocyanate silicate solid or cellular solid products
Silicon halides will react chemically with polyols to produce polyol silicate resinous products which will react chemically with polyisocyanates to produce polyisocyanate silicate solid or cellular...
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4169175 |
Removal of unreacted tolylene diisocyanate from urethane prepolymers
Disclosed herein are improved urethane prepolymers comprising the reaction product of a polyol with a monomeric isocyanate. The amount of residual unreacted monomeric isocyanate in said prepolymer...
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4165247 |
Polyurethane solid propellant binder
1. A composition capable of being cast and cured into a solid propellant prising: (a) an organic compound having as its sole reacting groups two isocyanate groups, and (b) the hydroxy...
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RE30067 |
Iminoimidazolidinedione and parabanic acid polymers containing imide groups
Novel iminoimidazolidinedione polymers containing imide groups (hereinafter PIPA-IM) are prepared from mixtures of dianhydrides, hydrogen cyanide and diisocyanates in an appropriate solvent and...
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4163086 |
Novel oxyalkylated polyol prepolymers, flame retardant interpolymers prepared therefrom, and processes for the preparation thereof
Liquid oxyalkylated polyol prepolymers are prepared by oxyalkylating a prepolymer prepared from a hydroxy aromatic compound, an aldehyde and furfuryl alcohol with an alkylene oxide containing about...
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4160075 |
Process for the production of foamed plastics with improved combustion characteristics
Foamed plastics with improved combustion characteristics and good mechanical strength are obtained by condensation of aminoplast precondensates with organic isocyanates in the presence of an acid...
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4159369 |
Process for the production of poly (urethane silicate) cellular solid/solid products
Liquid isocyanate-terminated polyurethane prepolymers will react chemically with oxidated silicon compounds to produce isocyanate-terminated polyurethane silicate prepolymers which may be cured...
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4153764 |
Process for the production of polyisocyanate organic silicate solid/cellular solid product
Polyisocyanates are reacted chemically with an oxidated silicon compound to produce a polyisocyanate silicate prepolymer. The polyisocyanate silicate prepolymer will react with organic compounds to...
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4153768 |
Organic hydroxy silicates utilized as curing agents for polyurethane prepolymers
Liquid isocyanate-terminated polyurethane prepolymers are cured by mixing them with 10% to 200% by weight, based on the weight of the prepolymer, of an organic hydroxy silicate compound or their...
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4153775 |
Self-crosslinkable polyurethanes
Process for the production of solutions of segmented self-crosslinkable polyurethanes by incorporating in the polymer chain segments of the general formula M--CO--NH--D'--NH--CO--A, wherein D' is...
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4148844 |
Polymerization products containing polycarbodiimides and vinyl monomers
Heat-curable casting resins comprising a mixture of a polycarbodiimide and a copolymerizable vinyl monomer.
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4147676 |
Cathodically depositable coating compositions and method of preparing
Heat curable binders for use in cathodically depositable aqueous coating compositions characterized in that curing is through alpha, beta-double bonds on end or side chains of the binders are...
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4145515 |
Method of forming storage-stable polyurethane prepolymers
Methods of forming liquid, low viscosity, low molecular weight, cross-linkable, stable polyurethane prepolymers which comprise: reacting polyisocyanates, and preferably aliphatic and cycloaliphatic...
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4132842 |
Silicon-phthalocyanine-siloxane polymers
A silicon-phthalocyanine-siloxane polymer having the formula ##STR1## WHEREIN Pc is a phthalocyanine nucleus, Ph is a phenyl group, n is an integer from 1 to 8, and x is an average value up to 20,...
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4130708 |
Siloxane urethane acrylate radiation curable compounds for use in coating compositions
Radiation curable compounds are disclosed which are derived from the reaction of siloxy-containing carbinol, a polyisocyanate and a polyfunctional compound having hydroxy and acrylic functional...
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4126742 |
High-modulus polyisocyanurate elastomers
Novel solid polyisocyanurate polymers are disclosed which comprises the reaction product of an organic polyisocyanate, a trimerization catalyst and a polyol combination comprising from about 0.025...
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4125703 |
Process for the production of phenol silicate compounds and their condensation products
Phenol compounds and fine granular silica will chemically react to produce phenol silicate compounds when heated in an aqueous solution with a suitable alkali catalyst. The phenol silicate...
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4119658 |
Aromatic isocyanato-polysulphonic acids
The present invention relates to isocyanato-polysulphonic acids comprising from 1 to 3 aromatically bound isocyanate groups which may be present at least partly in the dimerized form as uretdione...
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4119510 |
Photocurable diisocyanate compositions
A prepolymer for use in preparing photocurable compositions is prepared by reacting an aliphatic diisocyanate having terminal isocyano groups and at least one alkyl side chain with a hydroxy-,...
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4118410 |
Polyphenyl-polymethylene-polyisocyanate mixtures
Organic higher functional polyisocyanates are obtained by separating a mixture containing isomers of diphenylmethane diisocyanate and higher functional polyisocyanates having more than two benzene...
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4113705 |
Triisocyanates useful for the production of polyurethane resins
This invention relates to new liquid cycloaliphatic triisocyanates and to their use as isocyanate components for the production of polyurethane resins by the known isocyanate polyaddition process.
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4108843 |
Copolymers of polyparabanic acids and polyamide-imides
Random copolymers of polyparabanic acids and polyamide-imides are described. The copolymers are highly useful engineering thermoplastics which, unlike the corresponding polyparabanic acid...
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4107199 |
Bis(isocyanatopropyl) arylacetonitriles
The instant invention relates to nitrilediisocyanates of the formula: ##STR1## wherein Ar represents an aromatic hydrocarbon group having 6 to 14 carbon atoms which may contain one or more...
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4098730 |
Non-flammable organo-red mud polymers, some of which are electrically conductive, and process for their manufacture
This invention relates to a non-flammable homogeneous or foamed organo-red mud polymers, which essentially comprise the reaction product of red mud and a compound possessing at least two isocyanate...
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4094852 |
Process for the production of polytriazines in the presence of high-boiling esters
A polytrimerizable mixture of 30 to 99.9% by weight of at least one aromatic, polyfunctional cyanic acid ester or a prepolymer thereof, and 0.1 to 70% by weight of at least one high-boiling...
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4093674 |
Powder coating composition
A powder coating composition which comprises at least one solid resin and at least one polyisocyanate compound having an average of at least two isocyanate groups per molecule, in a weight ratio of...
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4086207 |
Polyurea compounds which improve the light stability of polymers
Novel polyurea compounds having the general formula ##STR1## where R 1 is hydrogen, alkyl, cycloalkyl, aryl, substituted aryl, aralkyl, or a piperidine radical of the formula ##STR2## where R 5 ,...
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4085019 |
Actinically-induced polyermization
Novel amides, preferably having a molecular weight in the range 1000 to 10,000, are prepared by acylating, partially or fully, amino groups in poly(ethylene imine) or poly(propylene imine) whereby...
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4076945 |
Method for making urethane-terminated polycarbodiimides and products thereof
This invention concerns a method of making a urethane-terminated polycarbodiimide and the product resulting therefrom wherein the product displays unique hydrolytic degradation stabilization...
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4076683 |
Molding compositions or masses suitable for manufacturing foundry molds and cores using the cold box method
Molding compositions or masses comprising sand and a two-component binder system are prepared. These two-component binders consist essentially of 1) polyisocyanate and 2) a low molecular weight...
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4073858 |
Shock absorbing unit molded from polyurethane (urea) rubber composition
A shock absorbing element, suitable for use in a railroad draft gear, as well as a resilient polyureaurethane composition therefor, said element characterized by a compressive cycling test as well...
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4072637 |
Process for the production of polyurethane resins and foams utilizing silico-formic acid
Silico-formic acid is reacted with a suitable isocyanate to produce an isocyanate-silico-formate resins of the type generally referred to as a polyurethane resin. An activator, such as water, may...
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4070258 |
Dual cure cathodic electrocoating compositions
An electrocoating composition containing a polymer having pendant tertiary amine groups, a polymer containing pendant mercaptan groups, an apha-, beta-ethylenically unsaturated carbonyl...
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4070346 |
Production of polyurethane powder
The instant invention is directed to the production of polyurethane or polyurea powder. The process broadly comprises atomizing an isocyanate, polyisocyanate or isocyanate pre-polymer in the liquid...
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4062833 |
Biuret polyisocyanates
The biuret polyisocyanates correspond to the formula ##STR1## wherein R is --CH 2 CH 2 --O--CH 2 CH 2 -- and X is hydrogen or --C(O)--NX--R--NCO, and they have not more than six isocyanato...
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4059570 |
Polythioether polyurethanes and their preparation
Novel polythioether polyurethanes of superior thermal and oxidative aging stability are prepared from polythioether dithiols derived from addition of dithiols to acetylenes under free radical...
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4055550 |
Continuous process for the production of partially blocked isocyanates
A method for manufacturing partially blocked isocyanate curing agents in which a polyisocyanate and a blocking agent for the polyisocyanate are separately and continuously metered into a reaction...
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4055551 |
Continuous process for the production of blocked isocyanates
A method for manufacturing blocked isocyanate curing agents in which a polyisocyanate and a blocking agent for the polyisocyanate are separately and continuously metered into a reaction zone in...
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4055549 |
Thermoplastically processable polyurethanes based on tolylene diisocyanate
Thermoplastically processable polyurethanes are produced by the reaction of tolylene diisocyanate, at least one polycaprolactone diol, a low molecular weight diol chain extender and water.
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4051166 |
Araliphatic diisocyanates
Novel araliphatic diisocyanates having the formula OCN(CH 2 ) 3 OArX(CH 2 ) 3 NCO are disclosed wherein X is oxygen or a single bond and Ar is an arylene radical. The araliphatic diisocyanates...
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4051165 |
Preparation of biuret polyisocyanates
A method of preparing biuret polyisocyanates by reacting diisocyanates with up to about 0.4 mol per mol of diisocyanate of a monohydric tertiary alcohol in the presence of from about 0.001 to about...
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4049601 |
Moisture-resistant polyurethane-based pressure-sensitive adhesives
Moisture-resistant, polyurethane-based, pressure-sensitive adhesives.
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