Porous, powdery polypropylene is disclosed, obtained by providing a hot solution of polypropylene in pentaerythrol ester as solvent, slowly cooling said solution down to approximately room temperature to provide a solidified mass with or without affecting mechanical size reduction of said solidified mass, and extracting said solidified mass with an extractant in which pentaerythrol is soluble, wit...

Reinforced easily moldable plastics are provided wherein particles of stretched porous polymer are incorporated into a plastic molding resin material to improve its physical properties without detracting from moldability. Particles or fragments of porous stretched forms of polyethylene, polypropylene, or polytetrafluoroethylene, are incorporated into a matrix of polytetrafluoroethylene polyvinylid...

A blend is provided which is suitable for preparing low density cellular products of the closed cell type, said blend comprising a vinyl chloride resin, e.g., polyvinyl chloride; a butadiene rubber, e.g., butadiene-acrylonitrile; and a liquid polyfunctional or monofunctional monomer, e.g., styrene. Insulation products such as sheets or tubes (for pipe insulation) are easily fabricated by freely ex...

Polyurea foam formulations, prepared by reacting a polymeric isocyanate with an aqueous activator component, and having incorporated therein a small but density-lowering and/or compressive strength enhancing amount of a lower-alkanol or alkylenediol, preferably having up to and including six (6) carbon atoms, especially isopropanol, are disclosed.

Polycarbonate compositions comprising an aromatic polycarbonate resin wherein dispersed are calcite particulates, are particularly suitable for the preparation of films characterized by their low coefficient of static friction, high light transmission and virtual freedom from haze.

A granular or powdery resin which is a condensation product of a phenol and an aldehyde and optionally a nitrogen-containing compound having at least two active hydrogens, said granular or powdery resin being characterized by (A) containing spherical primary particles and secondary particles resulting from the agglomeration of the primary particles, each of said particles having a particle diamete...

Stable, free-flowing dispersions in organic liquids of rubbers in the form of discrete particles having an average diameter of from 100 to 3000 nm which contains: A-as rubber, from 1 to 20% by weight, based on the total dispersion, of a crosslinked diene rubber; B-from 0 to 20% by weight, based on the total dispersion, of water in the form of a water-in-oil emulsion; C-as the continuous organic ph...

A biaxially stretched polyester film comprising a polyester and zirconium as an internal particle material, produced by polycondensation of terephthalic acid or its esterified derivative and alkylene glycol as the major essential monomeric components in the presence of a polycondensation catalyst, during which zirconium in the form of any compound thereof in an amount of 80 to 2500 ppm in terms of...

PURPOSE:Improve the heating effect of frames in the semiconductor device manufacturing equipment which has heating blocks to heat frames made by punching metal plates on which semiconductor devices are to be mounted.

Disclosed is a packaging material suitable for manufacturing synthetic sausage casings, comprised of a cellulose hydrate base layer, an optional adhesive layer and a layer of a vinylidene chloride-containing copolymer, as well as several methods for preparing the packaging material and sausage casings therefrom.

PURPOSE:Mapping out enhancement of the durability in improvement of the drain of the shutscover part of the disc brake preventing the generation of rust on this stop ring.

1489237 Coated substrates RAYCHEM CORP 11 June 1974 [11 June 1973] 25851/74 Heading B2E [Also in Divisions B5 and H2] A substrate is covered with an insert and a recoverable member the insert comprising a corrugated "fusible material" or a "fusible member" having at least one protruberance, the recoverable member is recovered to cause the protruberances or corrugations to be detectable through the...

PURPOSE:To realize the manufacturing method of the composite super conductor easy for manufacturing and high in critical current density.

Low density, closed cell, soft foam products having dimensional stability are made from ethylenic resins having low stiffness, especially comprising copolymers consisting essentially of ethylene and monoethylenically unsaturated non-ionic comonomers, by release to lower pressure of a flowable, foamable gel under pressure, e.g., by extrusion foaming, wherein the gel comprises the ethylenic polymer ...

A continuous process for manufacturing quick-setting phenolic foams is improved by using as the hardening agent a concentrated, substantially anhydrous solution of boron trioxide, and using as the blowing agent an organic liquid having a boiling point of 20 DEG -80 DEG C. Curing times are shortened and the resultant foam, having uniformly molecularly dispersed therein about 0.25-10.5% by weight o...

An inexpensive yet reliable method for incorporating a minor fraction of a percent by weight of nucleating agent in a propylene polymer is provided in which the nucleating agent is dissolved at a concentration of less than 10% in a homogeneous, alcohol-based, carrier liquid having a normal boiling point of not over about 120 DEG C. The resultant solution is atomized into a full jet spray of fine ...

A fiber reinforced epoxy resin article in which a Lewis base is employed as the catalyst for the addition reaction of a phenolic or alcoholic hydroxyl group and the oxirane group of the epoxy resin. The resin system has improved flexibility and pot life and the cured article has improved chemical resistance.

Compositions useful as frictions particles comprised of tri- and/or tetrafunctional phenol, rubber, aldehyde, protective colloid and a reaction promoting compound. The friction particles are formulated into friction elements. A process for producing the friction particles in particulate form.

12,469 USE OF ORGANOSILOXANE COMPOSITIONS AS FOAM STABILIZERS IN FLEXIBLE POLYESTER POLYURETHANE FOAM A process for manufacturing low density flexible polyester polyurethane foam utilizing as a foam stabilizer selected low molecular weight (e.g., 400 to 1500) organosiloxane compositions containing monomeric units A, B and C wherein A is a monofunctional trimethylsiloxy unit ¢(CH3)3SiO1/2!, B is a ...