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3976821 |
Rotationally molding a multilayered article
A hollow multilayered article is rotationally molded by introducing into the mold particles of a hompolymer or copolymer of ethylene containing a crosslinking agent and heating the mold during...
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3975334 |
Polymeric organotin hydride reagents
Insoluble polymeric organotin hydrides of the formula: ##EQU1## wherein P represents an organic polymer backbone; R and R 1 each represent a hydrogen atom, a lower alkyl group of 1 to 5 carbon...
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3969472 |
Method of manufacturing a foam fibrillated fibrous web from an isotactic polypropylene, polystyrene and α-methylstrene blend
Non-woven fabrics are produced from oriented foam fibrillated webs contaning 50 to 98 wt. % polypropylene and 2 to 50 wt. % polystyrene. The webs are assembled in a plurality of layers and then...
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3965051 |
Composite materials
Inorganic or organic particles or fibers are bonded together with an organic polyisocyanate containing ionic groups to form a composite material for filling cracks, joints or the like or for making...
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3960583 |
Method of preparing modified hollow, largely spherical particles by spray drying
Products of a generally spherical nature with particulate matter embedded in the walls are prepared by forming a suspension of said particulate matter in a solution of a film-forming substance in a...
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3959197 |
Use of solvent mixtures in making foamable compositions
A process for rapidly producing a substantially uniform, solid, cellular thermoplastic article comprising the steps of: (a) charging a vessel with (1) a solid thermoplastic polymer, (2) a solvent...
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3959100 |
Photopolymerizable coating compositions containing activated halogenated azine photoinitiator and process for making same
Ultraviolet polymerization of photopolymerizable binders or vehicles is improved by incorporating thereinto a sensitizer composition comprising an activated halogenated azine compound.
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3957700 |
Filled aminoplast moulding materials
Aminoplastic moulding compositions include a filler which comprises or consists of a cured particulate aminoplast material having a water absorption (absorbency) of less than 2 milliliters of water...
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3957701 |
Aminoplast moulding materials with cured aminoplast filler
Aminoplastic moulding compositions include a filler which comprises or consists of a cured, particulate aminoplast material having a water absorption (absorbency) of at least 2.0 millilitres of...
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3954686 |
Low density foam resin composite of high stiffness
The present invention relates to a method of producing low density polydi resins having high yield strengths and the products thereof. In particular a polydiene resin, such as dihydroxyl terminated...
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3951815 |
Composite semipermeable membranes made from polyethylenimine
Composite semipermeable membranes are made by reacting a film-forming polymer with a cross-linking monomer to form a polymeric ultrathin film having semipermeable properties. During the formation,...
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3950471 |
Manufacture of molded articles of particulate foamed ethylene copolymers
Manufacture of molded articles of foamed ethylene copolymers containing, attached to the polymer chain, substituents having Zerewitinoff-active hydrogen atoms, and a binder mix containing...
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3936335 |
Process for producing a buoyant fishing line
A buoyant fishing line is produced with foamed core surrounded by a filamentous line with or without being coated with a flexible surface layer.
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3935132 |
Thermoplastic urethane polymer filled with cross-linked urethane polymer
Thermoplastic urethane polymer is filled with cross-linked urethane polymer. The presence of the filler has little or no adverse effect on the properties of the thermoplastic urethane polymer.
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3931061 |
Blushed polystyrene pigment
A blushed and opaque pigment consisting essentially of spherical particles having a high optical efficiency and an average particle diameter in the range of from about 0.1 to 0.2 micron is produced...
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3928254 |
Uniformly pigmented unsaturated polyester resin molded articles
A filler- and fiber-reinforced, uniformly pigmented, unsaturated polyester resin molded article having low profile, which has a structure that unconnected hollow balls having a diameter of 5 to...
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3920593 |
Process for the preparation of polyamide foam plastics
An improvement in the process for producing foamed polyamide materials by anionically polymerizing lactam monomers wherein the foam produced has uniform cell size and improved properties is...
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3920589 |
Low-density polyester resin foams and method of preparation
Low-density polyester foams are prepared from an admixture which comprises in combination a liquid unsaturated curable polyester resin, a peroxide curing agent, an accelerator, a hydrazide blowing...
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3917547 |
Organic-inorganic foamed foam
The invention relates to compositions of matter in which certain inorganic particles contained in flyash are added to foamed flexible polymeric compositions to improve and extend their physical...
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3915919 |
Gypsum composition
A gypsum composition obtained by molding and drying an aqueous slurry comprising calcined gypsum, at least one polyvinyl alcohol, at least one thermosetting resin and at least one metal compound is...
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3907720 |
Insoluble porous polymeric iodine complexes useful as bactericides
Iodine complexes can be prepared of water-insoluble but water swellable cross-linked N-vinyllactam or N-alkyl-N-vinylamide polymers in the form of porous beads or granules. Such complexes are...
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3907656 |
Process for ultraviolet pigmented hardening of pigmented paint films
Cure of a paint film having a binder that is polymerizable by irradiation is improved by providing entrapped opacifying gas bubbles within the paint film. The opacifying entrapped gas bubbles can...
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3903052 |
Polymers containing alkoxysilyl-substituted biuret groups and processes for their preparation
New polyurethanes which contain silyl-substituted biuret groups in side chains are described. These polyurethanes have high storage stability, high reactivity and can be crosslinked by moisture...
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3899850 |
Carrier bodies for plants
A carrier body for a plant, comprising a mixture of foam flakes and nutritives, said foam flakes embodying foam flakes having the majority of their pores in the form of open pores, a binding agent...
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3899455 |
Process for preparing lightweight concrete
The adhesion of foamed particles, e.g., foamed polystyrene beads, in a lightweight concrete composition is improved by surface coating the foamed particles prior to incorporation into the...
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3897395 |
Process for chain-extending unsaturated terminated polyimides and products prepared therefrom
Aromatic polyimides with reactive end groups are cured by coupling together by addition or condensation to increase molecular weight with little or no by-product formation. These polyimides can be...
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3896060 |
Process for forming foamed unsaturated polyester resin products while under a partial vacuum
Compositions of unsaturated polyester resin solutions formed by dissolving the condensation polymers of unsaturated dicarboxylic acids and dihydric alcohols in ethylenically unsaturated...
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3894973 |
Use of pneumacel in rebonded structures comprising polyurethane scrap
A cushioning structure comprising shredded polyurethane foam or other similar foam and shredded pneumacel batting, bonded together by means of a polyurethane binder to form an improved rebonded...
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3895043 |
Silyl-substituted urea derivatives and a process for their preparation
This invention discloses a silyl-substituted urea derivative of controlled reactivity, high storage stability and which improve the properties of the cross-linked end products obtained by the prior...
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3892819 |
Impact resistant vinyl ester resin and process for making same
Vinyl ester resins with improved impact resistance and other benefits and advantages may be obtained by a process modification wherein up to 20 percent of the unsaturated monocarboxylic acid, which...
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3888766 |
Oil sorption material
Cellular materials impregnated with a hydrophobic and oleophilic sealant in an amount sufficient to coat the surfaces of the cells or capillary domains, for use in absorbing oil and like pollutants...
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3884844 |
Process for forming foamed polyester resins
Compositions of unsaturated polyester resin solutions formed by dissolving the condensation polymers of unsaturated dicarboxylic acids and dihydric alcohols in ethylenically unsaturated...
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3878133 |
Cushioning and materials therefor
An improved composite cushioning material is prepared by admixing urethane foam components and expandable lightly cross-linked beads of a styrene/acrylonitrile polymer. A resilient product is...
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3877978 |
Semipermeable membranes
A method of improving the rejection performance of semipermeable membranes by incorporating thereinto an effective amount of a supplemental polymer containing a substantial amount of acetyl groups....
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3873475 |
Composition for filling, patching and the like
Light weight patching, caulking or sealing composition which is especially useful for filling dents in automobile bodies. A conventional liquid thermosetting polyester resin, generally containing...
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3866652 |
Tire and wheel combination
A resilient tire and wheel assembly in which a pneumatic type vehicle tire has the cavity between the tire and wheel on which it is mounted filled with a solid, resilient elastomeric composition...
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3864181 |
Polymer foam compositions
A composition and method for forming foamed polymers is provided. The compositions comprise a dispersion of microspheres in a solution of the polymer in a solvent. The compositions are applied to...
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3860565 |
ENCAPSULATED ISOCYANURATE CATALYST
A one-part, room temperature-latent isocyanate-catalyst system trimerizable to polyisocyanurate is formed comprising an aromatic isocyanate having dispersed throughout liquid microcapsules of a...
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3857801 |
METHOD FOR OBTAINING A CONTROLLED INCREASE OF THE DENSITY OF POROUS POLYMERS
This invention relates to a method for increasing the density of porous polymers in a controlled manner by adding a monomer to a previously prepared porous polymer and subsequent polymerization of...
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3856721 |
SYNTACTIC FOAMS AND THEIR PREPARATION
A syntactic foam is produced by a controlled curing of a polymer which is a homopolymer of butadiene or a copolymer of butadiene and styrene or the like, at least 40% of which polymer is butadiene...
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3855049 |
COMPOSITE POLYMER PRODUCTS FOR THAT
The disclosure concerns a rigid, light weight structural composite comprising relatively fully expanded styrene-polymer bit-pieces adhesively enmeshed in a thermoset foam polyurethane matrix.
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3844876 |
FOAMED POLYESTER RESIN LAMINATED PRODUCTS
Foam comprised in a body of resilient polyurethane foam is compressed and is fused so as to remain in a permanently compressed state by subjecting the foam while compressed to heat until said...
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3843568 |
HEAT RESISTANT COMPOSITIONS
Heat resistant compositions comprising a blend or mixture of petrolatum and a partially cross-linked polymer such as p-tertiary-butylstyrene polymer cross-linked with divinylbenzene, which can also...
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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...
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3790422 |
PROCESS FOR THE AGGLOMERATION OF FLAKES OF EXPANDED POLYURETHANE
A process for the agglomeration of expanded polyurethane flakes comprising compressing the flakes at a temperature of between 180°C and 230°C is disclosed. Under the pressure, --NCO radicals in...
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3775206 |
PROCESS OF MANUFACTURING FOAMED BODIES OF PLASTICS MATERIAL
Foamable plastics material is introduced into and foamed freely in a freely flowable, particulate lightweight solid receiving material to form foamed bodies.
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3717597 |
SELF-EXTINGUISHING POLYURETHANE FOAM COMPOSITE MATERIALS AND METHOD OF PREPARING SAME
Self-extinguishing composite material comprises particulate polyurethane foam bound together with a binder. The binder forms a network within which the particles of foam material are included. At...
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3673127 |
ULTRAFINE POROUS POLYMER ARTICLE AND METHOD OF MAKING
Ultrafine porous polymer articles with a predetermined maximum pore radius and processes of producing such polymer articles are described wherein a thermoplastic polymer body is contacted with an...
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3664911 |
DIAPHRAGM FOR SOUND INSTRUMENT AND METHOD FOR PRODUCING SAME
A diaphragm for sound instrument and method for producing same in which the diaphragm comprises an assembly of foamed granules of thermoplastic resin, binder layer surrounding the foamed granules...
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3662765 |
SMOKE FILTER
A porous filter is provided which is effective for removing undesirable materials such as particulate matter from smoke, including tobacco smoke, comprising an organopolysiloxane disposed in the...
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