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4049632 |
Chain extending polyurethanes with a large excess of water
A polyurethane-urea composition is described that is highly resistant to textile fiber-dressings. The composition is a product from the reaction of an ester urethane prepolymer formed from the...
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4042750 |
Products and process for preparation of polyamides and shaped articles therefrom
Polyamides are prepared by reacting aromatic diacid with aromatic or aliphatic diamine in the molar ratio of about 1:0.5 to about 1:0.9 and then reacting this product with at least 0.1 to about 0.5...
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4035467 |
Method of injection molding a thermoset polyurethane article
In accordance with a preferred embodiment of this invention, a controlled phase change is used to trigger an exothermic polymerization reaction in an injection molding process. The subject method...
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4028310 |
Process for the production of polyureas
This invention relates to a process for the production of polyureas by reacting organic polyisocyanates with diamines, optionally in the presence of other polyfunctional compounds, i.e....
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4028309 |
Coating compositions containing esters of dibasic acids, glycols and glycidyl esters, and polyisocyanates
Diesters and triesters of dibasic acids, glycols, triols, and glycidyl esters, when formulated with polyfunctional isocyanates, form coating compositions which require little or no organic liquid...
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4028311 |
Process for the hydrolysis of poly(iminoimidazolidinediones) to polyparabanic acids
Processes for the efficient sulfuric acid hydrolysis of poly(iminoimidazolidinediones) (PIPA) to the corresponding polyparabanic acids (PPA) have been developed. Process conditions can be...
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4028313 |
Process for the production of water-dispersible polyhydroxyl compounds
This invention relates to a new process for the production of new water-dispersible polyhydroxyl compounds, to the compounds obtainable by this process and to the use thereof. An organic...
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4025670 |
Continuous process for lining pipes
A continuous process for lining pipes with thermosettable polymer made from prepolymer and curing agent, comprising the steps of: heating and degassing the prepolymer and storing it in a first...
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RE29224 |
Polyurethane urea elastomers based on polycarbonate macrodiols
Polyurethane urea elastomers with novel dissolution behavior and which are synthesized from polycarbonate macrodiols, diisocyanates and diamines and which can be prepared and dissolved in aqueous...
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4019972 |
Photopolymerizable copying compositions containing biuret-based polyfunctional monomers
This invention relates to a photopolymerizable copying composition comprising at least one binder, at least one photoinitiator, and at least one polymerizable, acid amide group-containing acrylic...
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4011311 |
Applicator stick
A gel type applicator stick of adhesive, deodorant or other dispersoid containing in percentages by weight from 0.01 to 45% dispersoid, 10 to 90% water or aqueous solvent and from 5 to 40% of a gel...
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4007151 |
Polyurethane coating composition
A solventless polyurethane coating composition having a low viscosity suitable for coating, which comprises (a) an aliphatic or alicyclic polyisocyanate containing at least 3 isocyanate groups, (b)...
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4005056 |
Process for the preparation of polyhydantoins and polyparanic acids
Process for the preparation of polyhydantoins or polyparabanic acids, characterized in that bis- or polyglycine derivatives or bis- or poly-monoamidooxalic acid derivatives are heated to...
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4005121 |
Process for the preparation of oligocarbonates with two catalysts
A process for the preparation of linear aliphatic polycarbonates having terminal hydroxyl groups is carried out in two stages: I. in the first stage, the transesterification is carried out in the...
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4001290 |
Organic isocyanate compositions and production thereof
Organic isocyanate compositions are prepared by reacting organic polyisocyanates alone or in the presence of other organic compounds which contain reducible functional groups with catalytically...
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3996223 |
Process for the production of polyisocyanates of isocyanurate structure
Soluble polyisocyanates of isocyanurate structure are produced by heating polyisocyanates in the presence of Mannich bases and carbamic acid esters of isocyanates and secondary alcohols. When such...
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3993610 |
Polyurethane foam
Selected chlorine-containing methylene-bridged diaryl diisocyanates are used in the production of polyurethane foam.
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3977889 |
Cement compositions
Cement compositions setting readily at temperatures below 0° C are disclosed which are prepared by mixing together and allowing to cure a hydraulic cement, an inert filler, an organic...
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3972910 |
Preparation of a chlorinated diisocyanate
A process for the preparation of compounds represented by the formula ##SPC1## Wherein Z is ##EQU1## WHEREIN R' and R' are hydrogen, alkyl or aryl and n is 0 or a positive integer, which compounds...
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3966683 |
Process for the preparation of compounds which contain hydantoin groups
A process for preparing compounds which contain hydantoin groups, which is characterized in that compounds which contain isocyanate or isothiocyanate groups are reacted with compounds which contain...
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3963680 |
One-part, room-temperature latent, curable isocyanate compositions
A one-part, room-temperature latent, curable isocyanate composition is prepared comprising an aliphatic or aromatic polyisocyanate having dispersed therethrough capsules containing a viscous liquid...
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3959233 |
Process for preparing polyamide-imide from trimellitic acid, diamine and diisocyanate and polyamide imide shaped articles
Polyamide-imides are prepared by reacting trimellitic acid with an aromatic or an aliphatic diamine in the molar ratio of about 1:0.55 to 1:0.95 and then reacting this product with at least 0.45 to...
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3954718 |
Process for preparing polymers containing carbamoyl-hydroxamate groups and the resultant polymers
Polymers made up of chains, which contain and/or are cross-linked by carbamoyl hydroxamate groups, are prepared by the interaction of hydroxamic acid and isocyanate groups contained in monomeric or...
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3950416 |
Synthesis of dicyanoformamides
Dicyanoformamides having aromatic moieties as novel composition of matter are prepared by the reaction of a diisocyanate having an aromatic moiety with two (2) moles of hydrogen cyanide in the...
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3940370 |
Method of making polyureas
A method of making a polyurea by reacting an aliphatic diamine with trimelisocyanatosilane under pressure in a closed vessel at a temperature sufficiently high and for a time sufficiently long to...
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3939116 |
Self-supported, oriented high-performance films having minimal thermal distortion properties
Highly unusual and useful novel high-performance, oriented, lowcrystalline, essentially heterocyclic structures, e.g. films, are prepared from certain novel and important process sequences. These...
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3939126 |
Acrylyl-terminated urea-urethane compositions
Acrylyl-terminated urea-urethane compositions that are the reaction product of an organic polyisocyanate, a hydroxylamine and a hydroxyhydrocarbyl acrylate. These compositions can be used in the...
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3939190 |
Group V pentavalent atom-containing compositions
A compound having the molecular formula: ##EQU1## wherein, M is selected from the group consisting of pentavalent atoms of Group V of the Periodic Table; R 1 , R 2 and R 3 are selected from the...
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3939124 |
Fire-retardant polyurethane resins prepared from side-chain halogenated aromatic polyisocyanates
Polyurethanes are made fire-retardant by including in the reaction mixture aromatic polyisocyanates having halogen-containing side chains.
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3936584 |
Formation of polyparabanic acid coatings and films by solvent treatment of powdered layer
This invention relates to processes and techniques for forming either coatings or self-supporting films from polymeric powders which melt at high temperatures (>150° C.) and cannot be made to...
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3935146 |
Polyurethaneamides dispersible in water and dispersions containing them
A polyurethaneamide containing ethylene oxide units and adapted to be dispersed in water without added emulsifiers and dispersions containing them are provided. The novel dispersions produce...
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3932318 |
Chloral copolymers
Chloral is copolymerized with one or more isocyanate, isothiocyanate, diisocynate, diisothiocyanate or ketene compounds to produce copolymers which are nonflammable and which can be made into a...
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3931111 |
Soluble hydrophilic polymers and process for processing the same
Soluble, hydrophilic polymers suitable for medical use and as blood plasma substitutes comprising low molecular weight polymer derived from at least one monomer of an acrylamide type material or a...
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3929744 |
Polymeric isocyanates and process for making same
A process for preparing an isocyanate-functional polymer which comprises reacting a sterically hindered amide polymer with a hypochlorite and recovering the isocyanate-functional polymer from the...
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3928376 |
N,N'-Substituted 2,4,5-triketoimidazolidines
The invention relates to a process for the preparation of a N,N'-substituted 2,4,5-triketoimidazolidine which comprises reacting an oxamidate ester with an isocyanate or an isocyanate-forming in...
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3925437 |
Reduction of acidity of organic polymeric isocyanates
The acidity of methylene-bridged polyphenyl polyisocyanate mixtures is reduced by mixing with the isocyanate mixture a lower alkylene oxide compound having from about 2 to about 4 carbons per...
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3922295 |
Isocyanate-containing oligomeric polyanhydrides
Novel oligomeric poly N-carboxylic anhydrides having the following structure are disclosed. ##EQU1## The unit Ar represents arylene and x represents an integer from 1 to 10 and y represents a...
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3920598 |
Non-ionic polyurethane dispersions having side chains of polyoxyethylene
A polyurethane which is adapted to be dispersed in water without an emulsifier is prepared by reacting an organic compound having reactive hydrogen atoms determinable by the Zerewitinoff method...
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3919174 |
Single package 100 percent solids urethane coating compositions
A single package liquid 100 percent solids composition of extended potlife containing an organic polyisocyanate, a polyol, a dialkyl tin diacylate catalyst and an organic carboxylic acid.
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3919218 |
Stable polyisocyanates and process therefor
Isocyanato isocyanurate solutions are prepared by the trimerization of aliphatic or cycloaliphatic isocyanates with aziridine or its derivatives as catalyst and trialkylamines with 1-5 carbon atoms...
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3917572 |
Resinous polybarbituric acid derivatives
Novel polymers are described which are characterized by the recurring unit ##EQU1## where R is the residue of an organic diisocyanate and X is cyano, nitro, halo, alkanoyl, aroyl, carbalkoxy. The...
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3917570 |
Polyurethane polyester-polyol compositions modified with an alkylenimine
Compositions useful as coating compositions comprise the reaction product of a polyurethane polyol which contains acidic carboxyl groups with an alkylenimine. Particularly desirable coatings are...
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3917546 |
Chloral copolymers
Chloral is copolymerized with one or more isocyanate, isothiocyanate, diisocyanate, diisothiocyanate or ketene compounds to produce copolymers which are nonflammable and which can be made into a...
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3917571 |
Non-elastomeric polyurethane compositions formed from a mixture of a low molecular weight polyol and an hydroxyl containing polyoxyalkylene compound
Mixtures comprising a low molecular weight polyol having a functionality of from 3 to about 8, a liquid modifier compound having a boiling point above 150°C, such as a hydroxyl-containing...
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3915935 |
Polyurethane adhesive comprising a polyester and a prepolymer of the same polyester
A two-part adhesive composition curable to tough solid state by mixture and reaction of its components in which the components are two normally liquid parts, the first part including a polyester...
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3915938 |
Solution for forming heat resistant polymers
A concentrated solution for forming improved heat resistant polymers comprising a mixture of a solution of a prepolymer having an amide group, an imide group and a hydantoin ring in the main chain...
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3915937 |
Poly(oxypropylene) glycol based polyurethane elastomers suitable for automotive body parts
Flexible automobile exterior body parts are molded from a polyurethane elastomer prepared from a reaction mixture comprising: a. a polymeric diol selected from the group consisting of...
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3912754 |
Organic polyisocyanates and method of making them
Organic polyisocyanates which are a reaction product of an excess of an organic polyisocyanate and hydrocyanic acid have the formula ##EQU1## in which R represents an aliphatic C 2 to C 12 ...
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3909497 |
Solid polymers thermally degradable to flowable compositions
A synthetic polymeric solid contains heat-sensitive groups which cleave at a temperature substantially lower than that at which thermal degradation would occur in their absence. Cleavage is...
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3907780 |
Preparation of carbodiimide-containing isocyanates
A process for converting at least a proportion of the isocyanate groups in an organic isocyanate into carbodiimide groups by heating the organic isocyanate with an organic phosphorus containing...
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