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4108805 Structurally regulated polyphosphazene copolymers  
This invention relates to polyphosphazenes which have an at least partially regulated structure corresponding to the formula: --N3 P3 (Cl)5 (OR1)--n (I)where n is greater than 2, and where R1 is...
4092381 Methods of fabricating microsponge deuterated hydrocarbon polymer targets which emit neutrons when irradiated by high energy beams  
Targets for high energy beams, such as laser beams, produced in laser fusion apparatus are described. The targets are porous spheres of deuterated hydrocarbon material, particularly deuterated...
4073843 Process of partially expanding thermoplastic particles using a mixture of steam and a hot dry gas  
Thermoplastic material in particulate form and containing a blowing agent is partially expanded by means of a mixture of steam and another hot dry gas such as air present in specified proportions...
4073839 Method of zone pouring foam products  
A foamed article having zones of varying hardness is prepared by moving a shaping means relative to at least two foam pouring means to distribute a foamable mixture over the surface of the shaping...
4073840 Method for forming a fiber reinforced foam article  
A fiber reinforced foam having a predetermined uniform distribution of fibers throughout the skin and core is prepared by slurrying fibers with a major component of a foamable resin composition,...
4073841 Process for uniformly filling cavities with a foam insulating material  
Cavities are filled with a foam insulating material by introducing the reaction mixture through the outlet nozzle of a mixing head which is drawn lengthwise through the cavity at a rate adapted to...
4064077 Toughened articles composed of linear aromatic polymers  
Shaped articles composed of compacted polymeric particles wherein said polymer comprises substantially linear, aromatic polymer selected from the group consisting of aromatic hydrocarbon polymers,...
4055545 Smoke-suppressant additives for polyphosphazenes  
Smoke suppressant additives for poly(aryloxyphosphazene) homopolymers, copolymers and foams thereof are described. Smoke suppression occurs by the incorporation of an effective amount of a...
4045337 Asymmetric, semipermeable membranes of cyclic polyureas  
Asymmetric, semipermeable membranes of polyhydantoins or polyparabanates.
4038350 Method of producing integral non-foamed skin layer shaped articles  
Shaped articles comprising a polymeric frame of uniform density having one or more substantially non-foamed skin layers over all, or only a part of, its surface are produced according to the...
4032606 Method for producing solid-porous rubber articles  
According to the proposed method for producing solid-porous synthetic rubber articles, a preselected portion of a molded blank of a raw V-like polymeric elastomer compound containing a blowing...
4029840 Synthetic leather  
Synthetic leather comprising cross-linked foamed syndiotactic 1,2-polybutadiene as a main ingredient.
4029615 Polymeric cellular structures  
Shaped cellular structures formed from media which are polymerizable and/or cross-linkable by free radical initiation to either a thermoplastic or thermosetting solid, process for production of...
4026844 Method of foaming a siloxane composition using microwave energy  
A polydiorganosiloxane gum base stock can be foamed and cured by exposing to a microwave source a composition which comprises 100 parts by weight of the stock, 3 to 25 parts by weight of an...
4019909 Photohardenable vesicular image-forming elements  
A photohardenable thermoplastic stratum containing a thermally activated blowing agent may be used to record images by imagewise exposing the stratum to actinic radiation adapted to polymerize and...
4014770 Electron beam cured intumescent coating composition  
A foam and flame-breakable resin composition comprising a non-inflammable agent, an auxiliary non-inflammable agent, a foaming agent, an ash coagulating agent and a resin system consisting...
3992501 Process for the manufacture of void-free polyolefin foam moldings  
Foam moldings of olefin polymers are prepared by heating, and pressing together, foamed particles of an olefin polymer, containing crosslinked constituents, in molds, a temperature gradient of...
3985632 Small, porous polyacrylate beads  
Uniformly-shaped, porous, round beads are prepared by the co-polymerization of an acrylic monomer and a cross-linking agent in the presence of 0.05 to 5% by weight of an aqueous soluble polymer...
3975249 Aromatic polymers of increased resistance to flow and molecular weight obtained by irradiation  
Aromatic polymers of increased resistance to flow and molecular weight are obtained by irradiation using β-rays or γ-rays at temperatures up to 400°C of an aromatic polymer whose molecular chains...
3940349 Compositions and process for making rigid plastic foams of modified vinyl ester resins and silicone compounds  
By the introduction of pendant phthalate, isophthalate or terephthalate half ester groups thermosettable vinyl ester resins can be successfully frothed using certain silicone frothing agents.
3923704 Process for making porous polyester granules  
A process in which vesiculated pigmented polyester resin granules are prepared as an aqueous slurry, by the curing of discrete globules of a solution of an unsaturated polyester resin in a...
3892686 Cellular products produced by foaming and cross-linking aromatic polysulfides  
Sulfur-based foams produced by reacting aromatic carbocyclic or heterocyclic compound substituted by --OH, or --NHR groups with molten sulfur to form an aromatic polysulfide, cross-linking the...
3891576 Process  
A process of manufacturing a polymeric composition of ion-exchange resins possessing amphoteric characteristics. The compositions are produced by reacting in the presence of a free radical...
3888802 Oxalylbis(sulfonyl hydrazides), used as blowing agents for gas-expandable polymeric material  
Certain oxalylbis(sulfonyl hydrazides) are useful as blowing agents for polymeric materials. Some of these compounds are themselves new.
3876446 Manufacture of poromeric materials  
Poromeric web materials are continuously manufactured by applying to a thin layer of ice crystals a textile fibrous structure and an aqueous solution or dispersion of A. polyethylenically...
3864289 Preparation of cellulosic semi-permeable membranes  
A process for the preparation of cellulosic semi-permeable membranes is disclosed in which the membrane is formed from a formulation containing a cellulosic membrane material, a cellulosic...
3852177 METHOD OF RADIATION CROSS-LINKING OLEFIN POLYMERS CONTAINING ACRYLATE CROSS-LINKING PROMOTERS  
A cross-linked olefin polymer is produced by applying high energy ionizing radiation to a mixture of the olefin polymer and a cross-link promoter such as trimethylolpropane triacrylate in an...
3819550 INTUMESCENT COMPOSITION, FOAMED PRODUCT PREPARED THEREWITH AND PROCESS FOR MAKING SAME  
An intumescent composition and the foamed product prepared by heating the composition are provided wherein the composition comprises the reaction product of para-benzoquinone dioxime and a...
3819545 FOAMABLE COMPOSITION COMPRISING A GAS-EXPANDABLE POLYMERIC MATERIAL AND OXALYL CARBAZATE OR OLIGOMERS THEREOF, AND METHOD OF FORMING SAME  
Certain oxalyl carbazates are useful as blowing agents for polymers. Some of these carbazates are new compounds.
3817961 POLYMERIZATION OF 9-VINYL CARBAZOLE  
9-VINYL CARBAZOLE IS POLYMERIZED BY RAPIDLY HEATING THE SAME IN THE FORM OF A POWDERED LAYER CONTAINING AT LEAST ABOUT 0.25 PERCENT BY WEIGHT OF AZOBIS NITRILE CATALYST OR INITIATOR TO CAUSE RAPID...
3817851 RADIATION CROSS LINKING OLEFIN POLYMERS IN COMBINATION WITH TRIVINYL ISOCYANURATE  
3816284 RADIATION GRAFTING OF VINYL MONOMERS ONTO CELLULAR POLYMERIC SUBSTRATES  
The heat resistance of cellular plastics is remarkably improved when they are subjected to irradiation by ionizing radiation in the presence of a mixture of a cross-linking agent comprising an...
3786134 PROCESS FOR PRODUCING HOLLOW CARBON MICROSPHERES  
3778364 RADIATION PROCESS FOR MAKING PLASTIC PAPER CONTAINING EXPANDABLE,THERMOPLASTIC MICROSPHERES  
3778294 PRODUCTION OF POLYMERS WITH A FIBROUS STRUCTURE  
3723362 LOW DENSITY POLYSTYRENE PEARLS AND METHODS OF MAKING THEM  
3717559 PROCESS FOR THE PREPARATION OF POLYPROPYLENE RESIN FOAMS  
A process for the preparation of a polypropylene resin foam having closed cells by irradiating high energy rays onto a mixture of a polypropylene resin, a foaming agent, and a cross-linking...
3714083 METHOD FOR PRODUCING FOAMED ARTICLE FROM POLYPROPYLENE  
A method of producing a foamed article having a uniform cellular structure using a modified polypropylene produced by irradiating polypropylene with an ionizing radiation of from 0.1 to 5.0...
3709805 PRODUCTION OF POLYMERS WITH A FIBROUS STRUCTURE  
3709806 PROCESS FOR THE PREPARATION OF RADIATION-CROSSLINKABLE FOAMABLE POLYOLEFIN PARTICLES  
3706677 POLYXYLYLIDENE ARTICLES  
3673129 SYNTHETIC RESIN MULTICELLULAR PRODUCT WHOSE MAIN COMPONENT IS ACRYLONITRILE AND PROCESS FOR PREPARATION THEREOF  
Process for preparing multicellular products which comprises mixing urea and/or a urea derivative, and an acid with a monomeric mixture comprising 60-95 percent by weight of acrylonitrile and 40-5...
3655542 MODIFIED CELLULAR PARTICLE AND PROCESS FOR THE PRODUCTION THEREOF  
A modified cellular particle is provided for molding cellular articles and comprises a partially foamed thermoplastic resin containing excess foaming agent which decomposes upon heating to...
3650993 CRUSH-BEFORE-FINAL CURING PROCESS FOR MAKING DENSIFIED POLYURETHANE FOAM UTILIZING A VOLATILE ORGANIC FOAMING AGENT  
3640915 PRODUCTION OF FOAMED POLYETHYLENE  
3616365 PROCESS OF MAKING PARTICULATE EXPANDED OLEFIN POLYMERS HAVING HIGH THERMAL STABILITY  
Particulate expanded ethylene or propylene polymers having a particle diameter of 3 to 50 mm. and a bulk density of 5 to 200 grams/liter and a gel content of 10 to 85 percent by weight; and a...
3600336 POLYAMIDE RESIN FOAM AND A METHOD OF PREPARING THE SAME  
3592785 METHOD OF MAKING POLYETHYLENE FOAM  
3586647 SOLID STATE POLYCONDENSATION WITH POROUS POLYESTER PREPOLYMER PARTICLES  
3579472 METHOD OF FABRICATING EXPANDABLE THERMO-PLASTIC RESINOUS MATERIAL