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4273884 |
Stable emulsions of polyols and crosslinkers for polyurethanes
A stable emulsion of a high molecular weight polyol and either ethylene glycol or 1,4-butane diol is made by adding to the mixture an ethylene oxide/propylene oxide copolymer diol having an average...
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4247656 |
Poly(urethane-isocyanurate) foams
Novel poly(urethane-isocyanurate) foams and their preparation are described. These foams are low density, non-friable, heat stable, polymeric reaction products of polyisocyanate and polyoxyalkylene...
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4228247 |
Stabilized polyoxyalkylene polyether polyol
Synergistic stabilizer combinations consisting of phenols such as 2,6,-di-t-butyl-4-methylphenol, amines such as 4,4'-bis(alpha,alpha- dimethylbenzyl)diphenylamine and p,p'-di-octyldiphenylamine,...
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4223098 |
Blowing catalyst composition for low density flexible polyurethane foams
Low density flexible polyurethane foams can be prepared using water and relatively large amounts of methylene chloride as the foaming agents in the presence of an organic or inorganic tin compound...
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4219624 |
Stabilization of amine catalysts in a composition with halogenated polyols for use in polyurethane foam production
A catalytically stabilized polyol composition is disclosed for use in the production of polyurethane foam. The composition comprises a halogenated polyol and an acid-blocked amine catalyst.
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4211848 |
Process for the production of polyisocyanate-polyester-silicate plastic
A polyisocyanate is reacted with an unsaturated polyester containing a vinyl monomer and a water-binding agent, then cured with water containing an oxidated silicon compound and an initiator such...
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4205135 |
Closed cell phenolic foam
A process for producing a closed cell phenolic-resin foam material comprising a phenolic-resin polymer and a surfactant which is branched, non-ionic, with a hydroxyl value less than 50 achieved by...
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4200697 |
Process for the production of polyester silicate plastics
Unsaturated polyester resins will form foamed or solid plastics with water-binding agents containing an oxidated silicon compound in the presence of an initiator.
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4197372 |
Semi-flexible polyurethane foams containing amylaceous material and process for preparing same
Semi-flexible, shock-absorbing polyurethane foams containing an amylaceous material, such as a cereal starch or flour, and having an open cell structure are prepared by co-reacting the amylaceous...
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4177335 |
Process for preparing a polyurethane foam from an oxyalkylated product
An oxyalkylated product useful for making polyurethane foams is prepared by reacting an alkylene oxide with a heated mixture of a phenol and a non-phenolic active hydrogen compound, at least one of...
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4166163 |
Colored polyurethane foams and a process for their production
Colored polyurethane foams are prepared by the reaction of a polyisocyanate with a component that contains at least two compounds having functional groups containing active hydrogen atoms and that...
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4160076 |
Simulated natural sponge based on hydrophilic polyurethane
The invention disclosed is for new improved hydrophilic crosslinked polyurethane foams which simulate natural sponges and prepared by reacting an isocyanate capped polyoxyethylene polyol reactant...
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4136238 |
Non-flammable and optionally electrically conductive organo-silicate polymers and process for preparing same
This invention relates to a process for preparing organosilicate polymers by reaction of a water glass solution with a compound having at least two isocyanate groups. The reaction is carried out in...
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4129694 |
Fabric softener urethane foam and method
The invention disclosed relates to a new fabric softener foam having improved utility for softening textile fabrics in either a standard or automatic clothes dryer as well as in an automatic washer.
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4129693 |
Urethane-modified isocyanurate foams having enhanced physical properties
Urethane-modified isocyanurate foams are prepared by catalytically condensing an organic polyisocyanate in the presence of a polyol and from 5% to 50% by weight based on the weight of the organic...
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4127515 |
Waxing sponge
A hydrophilic flexible open-celled poly (urea/urethane) sponge derived from prepolymer produced by reaction of a polyoxyalkylene polyol with a stoichiometric excess of an organic polyisocyanate,...
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4107107 |
Process for the manufacture of a flame resistant, insulating, energy-absorbing, porous phenolic foam
A high compressive strength phenolic resin foam is made by: adding between about 0.5 to 5.0 parts of a dual surfactant system and about 8 to 25 parts of a blowing agent, to 200 parts of a phenolic...
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4073733 |
PVA membrane and method for preparing the same
A polyvinyl alcohol semi-permeable membrane is prepared which has micropores with an average diameter of 0.02 to 2 microns as defined by the interpore partition walls having thicknesses in the...
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4011181 |
Polyurethane foams containing stannous catechol derivatives
Polyurethane foams are prepared from compositions containing, as gel catalysts, a select group of stannous catechol derivatives.
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4001148 |
Process for the production of flame-resistant phenolic resin foam plastics
Flame-resistant foam plastics are prepared by mixing with an aqueous alkaline condensed phenol-formaldehyde resin solution an expanding agent such as hexane and an acidic curing agent after which...
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3985688 |
Poly (urethane-urea) foam sealants for underground application and fluid precursors
A water-bearing structure, such as a sewer, water line or aqueduct, is sealed to prevent or minimize the leakage of water into or from said structure by placing at the locus of said leakage a fluid...
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3979341 |
Urea formaldehyde foam
A foaming system includes a foaming agent solution and a resin solution. In a preferred embodiment, the foaming agent solution includes from 1.6 to 4.8 mmols of dibutyl naphthalene sulfonic acid as...
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3945968 |
Heat-resistant polyurethane compositions
Polyurethanes are rendered resistant to heat and oxidation by addition, as stabiliser, of a hydroxylic spiro-bis-indane of the formula: ##SPC1## In which each of the R 1 radicals which may be...
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3945964 |
Aqueous epoxy emulsions
Stable aqueous emulsions of epoxy resins containing as an emulsifying agent between 2 and 10% by weight relative to the weight of the epoxy resin of ethylene oxidepropylene oxide block polymers...
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3941725 |
Process for the manufacture of epoxide resin foams
Epoxide resin foams are manufactured by curing a mixture which contains an epoxide resin, a blowing agent, a surface-active agent and the tetraglycidyl ester of cyclohexanone- or...
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3931063 |
Process for the manufacture of porous solids consisting of crosslinked urea-formaldehyde polycondensation products
To manufacture porous solids, possessing an internal surface area of more than 10 m 2 /g of crosslinked urea-formaldehyde polycondensation products, an aqueous solution of urea and formaldehyde or...
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3899520 |
Stannous catechol derivatives and process for preparing them
A process for the preparation of stannous catechol derivatives by the reaction of a catechol with a stannous carboxylate is disclosed. Selected novel derivatives are prepared by this process which...
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3894972 |
Process for the preparation of carbodiimide-isocyanurate foams
Rigid cellular foam compositions characterized by carbodiimide and isocyanurate linkages are prepared by catalytically condensing an organic polyisocyanate in the presence of a catalytically...
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3873476 |
Hydrophilic polyurethane foam
An open-cell, hydrophilic polyurethane foam having a high compression strength and a high water retention capacity which foam is suitable for use as a substrate for cut flowers and which foam is...
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3684753 |
FLAME-RESISTANT POLYURETHANE COMPOSITIONS
Novel polyurethane foams possessing improved resistance to burning and flame propagation are prepared by employing 2,5-tolylene diisocyanate or its ring-substituted chloro- or bromo- derivatives as...
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3669913 |
SOLUTION COMPOSITIONS OF SILOXANE-OXYALKYLENE COPOLYMERS AND AMINE CATALYSTS AND USE FOR MANUFACTURE OF POLYURETHANE FOAM
A solution composition, particularly useful for the manufacture of flexible polyether urethane foam, is provided comprising water, a hydrolytically stable siloxane-oxyalkylene block copolymer, an...
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3516950 |
FOAMED POLYMERS
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3507815 |
URETHANE FOAM FORMULATIONS CONTAINING HYDROLYTICALLY STABLE SILOXANE-OXYALKYLENE COPOLYMERS
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3502712 |
BIS(DIALKYLAMINOALKYL) 4,4'-CARBONYLPHTHALATE
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3471411 |
ANTIMONY ALCOHOLATE CATALYST COMPOSITION
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3463745 |
POLYURETHANE SPONGE AND PROCESS THEREFOR
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3457203 |
HYDROPHILIC POLYURETHANE FOAMS AND A PROCESS FOR PREPARING THEM
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3450774 |
HYDROXYL-ENDED EPIHALOHYDRIN POLYMERS
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3449320 |
HEXACHLOROBUTADIENE POLYOL COMPOUNDS
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3429837 |
POLYURETHANE FOAMS CONTAINING TERTIARY ESTERS OF PHOSPHOROUS ACID
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3423339 |
POLYURETHANE FOAMS UTILIZING AN OXYETHYLATED TALL OIL FOAM STABILIZER
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3405077 |
Process for making soft polyurethane foams and product
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3316188 |
Dielectric lens material comprising a halogenated epoxy resin composition and a polymerized vegetable oil derived polyamide resin
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3238154 |
Preparation of a polyurethane resin using a tetraalkyl guanidine as a catalyst
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3201359 |
Process for preparing wax extended polyurethane foams
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3155625 |
Color stabilization of mixtures of trichlorofluoromethane and n, n, n', n'-tetrakis (hydroxyalkyl) alkylenediamines
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3145185 |
Cellular polyurethane materials and process for preparing same
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3135708 |
Polyurethane plastics and preparation of same
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3110686 |
Foamed elastomeric material which is the reaction product of a linear polycarbonate, an organic diisocyanate and water
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3109825 |
Manufacture of polyurethane materials
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