Abstract: A polyurethane RIM system has at least two molding stations. The reactants are brought to the mixheads as three separate streams. One stream contains the isocyanate, the second stream contains some of the polyol, the chain extender and crosslinker and a third stream contains additional amounts of the polyol, along with what additives might be desired. At each mixhead the proportions of ingredients are controlled to give an isocyanate index of about 100, but the ratio of one polyol stream to the other is regulated to control the flex modulus and other properties of the molded product as may be desired. In this way, one source of supply can be used to feed several molding stations, each of wich may produce a product of different physical properties and thus of different costs.

Abstract: The present invention relates to release coatings which comprise cellulosic esters or cellulosic ethers in combination with adhesion-promoting compounds having an affinity for vinyl chloride-containing compositions. The release coatings maintain their adherence characteristics during processing of the structure in which they are disposed, but substantially lose their adherence characteristics when said structure is fused, thereby becoming easily separable from the resulting product.

Abstract: Small quantities of hydrogenated polybenzyls act as a perfect mould release agent for aromatic polyesters based on diphenols and iso- and/or terephthalic acids and do not appreciably impair the elastic strength characteristics, the dimensional stability under heat and the transparency.

Abstract: The use of polyisocyanates as binders in the preparation of particle boards is subject to the drawback that the boards exhibit a tendency to adhere to the face of the platens used in their formation. This problem is minimized by incorporating minor amounts of a mixture of certain organic sulfonic acids, hydrogen sulfates, salts and derivatives thereof, into the polyisocyanate to be used as binder. The polyisocyanates and the sulfonic acids, hydrogen sulfates, salts and derivatives are applied to the particles separately, or after preblending one with the other. Whether the components are applied separately or in combination one with the other, they can each be applied either neat of in the form of an emulsion or emulsions.

Abstract: Liquid compositions suitable for hot post-mold coating of cured sheet molding compound (SMC) parts comprise a reaction product of an epoxide and an unsaturated carboxylic acid mixed with a low shrink additive and a filler having a sheet-like structure. These liquid compositions are used to smooth surfaces, fill porosity and other voids and to eliminate or reduce sink marks. Coatings typically are cured in less than two minutes and appear able to provide many features of normal painting without paint facilities except possibly those needed for touch-up.The application method used to date has been to compression mold an SMC part in the usual way, separate the mold halves, inject the liquid composition and reclose the mold for a second cure cycle. A unique feature of the liquid composition is its ability to adhere to an uncleaned SMC molding.

Abstract: Disclosed is a method for continuously lubricating cable during continuous dry curing of cable insulation and insulation shield to reduce friction between the cable surface and the dry curing apparatus, thereby eliminating cable oscillation and vibration and increasing product quality and the speed of production, comprising coating insulation compound pellets and insulation shield compound pellets with incompatible lubricant immediately prior to extrusion of insulation and insulation shield on to the cable.

Abstract: The object of this invention is to provide a composition of thermoplastic rubber which can be extruded into fibers and films with exceptional strength and good elasticity. Current formulations of some thermoplastic rubbers cannot be extruded into fibers or films with the accompanying strength and elasticity.Compositions of the current invention comprise 20 to 50% by weight of one of a group of fatty acids or fatty alcohols containing from about 12 to about 24 carbon atoms and 80 to 50% by weight of a member selected from the group consisting of A-B-A block copolymers, where B is poly(ethylenebutylene) and A is a thermoplastic polymer which is phase incompatible with B.This composition of matter results in a thermoplastic rubber composition that is easily extrudable into fibers or films. Extruded fibers of the current composition can be made into elastic fabrics, elastic bands for clothing or made into nonwoven structures for use in elastic bandages or wrapping.

Abstract: Disclosed is a carbon extrusion oil for preparing carbon and graphite electrodes. The composition comprises a mixture of straight-chain paraffin hydrocarbons and cylinder stock derived from a naphthenic type of crude oil. This invention relates to a method for producing extruded carbon or graphite bodies and to a composition for use therein.

Abstract: A process for the expansion of an expandable, polymeric, bead material by exposing the bead material to steam at an elevated temperature, to effect the expansion of the bead material into a polymeric bead material form, while tumbling the bead material during expansion to prevent fusion, the improvement which comprises: employing as a lubricant for the bead material a lubricant material which, on exposure to the steam and prior to the end of the expansion of the bead material, is changed in lubricant characteristics, to provide an expanded, polymeric foam bead material having a reduced surface lubricity.

Abstract: Flexible coextruded tubing having an outer portion (14) of polyvinyl chloride plastic containing a minor amount of intimately mixed silicone oil and having an inner portion (12) of plastic free of silicone oil.

Abstract: A process for the production of fibre-reinforced sheet material in indefinite lengths comprises a first rolling step wherein a curable dough of thermoplastic polymer containing reinforcing fibres is rolled onto one face of a band to form a first coating which is dried prior to a second rolling step wherein further dough is rolled onto the first coating to form with the first coating a single layer; said single layer is dried, stripped from the band and cured. The dough includes a special solvent system comprising a solvent for the polymer and a non-solvent liquid, to give the dough a "release" characteristic.

Abstract: A reaction product of a fatty acid ester and an organic polyisocyanate is included in a foamable reaction mixture containing an organic polyisocyanate to provide a molded product which can be removed from a mold whose surface has not been coated with conventional mold release agents.

Abstract: Improved mold release is obtained in a styrene polymer by incorporating a mixture of fatty acid and metal fatty acid salt.

Abstract: This invention relates to compositions and methods for forming polyether polyurethanes utilizing internal release additives for the purpose of facilitating mold release in the production of molded objects. The invention discloses four classes of internal release additives: (1) mixtures of aliphatic or aryl carboxylic acid and a polar metal compound; (2) caboxyalkylsiloxanes; (3) aliphatic glyoximes; and (4) aralkyl quaternary ammonium salts.

Abstract: An antifriction nylon member is provided which is comprised of a lubricant, a surfactant, and nylon wherein the lubricant is substantially uniformly dispersed throughout the nylon by the surfactant.

Abstract: The processability and melt strength of halogen-containing polymers derived at least in part from vinyl chloride or vinylidene chloride are significantly improved using a conventional external lubricant in combination with an oxidized ethylene polymer exhibiting a melt viscosity of from 1,000 to about 60,000 centipoises at 140.degree. C. and an acid number of at least 5.

Abstract: A reaction product of a fatty acid ester and an organic polyisocyanate is included in a foamable reaction mixture containing an organic polyisocyanate to provide a molded product which can be removed from a mold whose surface has not been coated with conventional mold release agents.

Abstract: A covering film containing a thermoplastic resin productive of burnt dregs and a thermoplastic resin not productive of burnt dregs moderately disperses in the refractory filler of the mold and forms a relatively thin shell layer near the wall defining the mold cavity in order to successfully avoid generation of mold destruction and sand inclusion and streamline the whole casting process.

Abstract: A method of releasing molded articles from a mold by coating the mold with zero grain soft water prior to insertion of the material to be molded into the mold, zero grain soft water meaning the substantially total absence of divalent ions, such as calcium or magnesium, in the water.

Abstract: Disclosed is a method of bonding two layers of thermosetting plastic. A thin sheet of thermoplastic material is interpositioned between two layers of thermosetting plastic and the combination is subjected to temperatures sufficient to cause the thermosetting plastic layers to bond and cure. The thermosetting plastic contains mold release agents which are absorbable by the thermoplastic sheet, and crosslinking monomers in which the thermoplastic sheet is dissolvable at molding temperatures.

Abstract: An injection moldable phenol aldehyde resin composition in pellet form having a diameter of at least 1/16 of an inch and having in admixture with the pellets a metallic salt of a long chain fatty acid and to a process for preparing such composition in pellet form.

Abstract: The invention relates to a thermoplastic moulding composition comprising a high molecular, thermoplastic aromatic polycarbonate based on an aromatic dihydroxy compound and containing 0,01 to 0.5% by weight of an ester of a saturated aliphatic carboxylic acid with 10 to 20 C. atoms per molecule and an aromatic hydroxy compound with from 1 to 6 OH groups.

Abstract: A molded rubber article is described having an exterior or surface layer which is formed of a blend including a heat setting rubbery polymer, and a halogenated polyethylene acting as an internal mold release agent during processing and also enhancing the surface qualities of the molded article.

Abstract: A mold-release agent is provided which consists essentially of 99.9% to 80% by weight of an aromatic polyisocyanate containing at least two isocyanate groups and 0.1% to 20% by weight of a fatty acid ester, e.g., glycerol trioleate, olive oil, peanut oil, etc. A process of using the material by incorporating it in polyurethane foams is disclosed.

Abstract: This invention relates to compositions and methods for forming polyether polyurethanes utilizing internal release additives for the purpose of facilitating mold release in the production of molded objects. The invention discloses four classes of internal release additives: (1) mixtures of aliphatic or aryl carboxylic acid and a polar metal compound; (2) carboxyalkylsiloxanes; (3) aliphatic glyoximes; and (4) aralkyl quaternary ammonium salts.

Abstract: Soaps and ester-soaps of high molecular weight branched- and straight-chain aliphatic monocarboxylic acids obtained from .alpha.-olefins containing 22 or more carbon atoms are useful lubricants for structural resins. High molecular weight acids useful for the preparation of the soaps and ester-soaps are obtained by the free radical addition of a short chain monocarboxylic acid to C.sub.22+ olefin or by ozonization of the C.sub.22+ olefin. The products of this invention provide excellent internal-external lubrication for PVC homopolymers and copolymers.

Abstract: Process and apparatus for solidifying molten materials by pouring onto a substrate and cooling, in which undesired crystallinity is avoided by first forming a solidified protective stabilizing skin on the melt surface, e.g. by carefully controlled air cooling or dusting with powdered material, before more vigorous cooling by fluid coolant, e.g. air or water, directed against the solidified skin. Optionally, silicone liquids and/or kerosene or other hydrocarbons of lower boiling range are used in minor amounts to treat the melt before pouring to promote the formation of amorphous solidified material and provide increased hardness on aging. When using an endless belt as substrate, the plain solidification surface may be modified by superposing a skeleton framework to form selectively shaped tablet or bar molds. The process and apparatus are particularly applicable to the solidification of molten sulphur.

Abstract: Rigid composite articles comprising a relatively thin, impression-retaining surface formed of a hard, rigid, room-temperature cured urethane resin and a relatively thick backing and reinforcing are made by casting a thin layer of urethane resin on the surface of a master, curing the urethane, then casting thereon a relatively thick backing layer of a casting material such as plaster or resin.

Abstract: A soft, nonwoven web is produced by adding directly to a thermoplastic polymer at the time of extrusion a lubricating agent having an HLB number in the range of 8 to 20 and a molecular weight in the range of from 200 to 4000. The lubricating agent is uniformly distributed into the polymer as extruded into filaments. The filaments are collected to form a web and then subjected to heat treatment in the range of from 180-260.degree. F. for at least about 1-7 seconds. The lubricating agent migrates to the surface of the fibers producing a release effect and preventing secondary bonding from occurring. After pattern bonding to provide spaced areas of high intensity bonds, the result is a soft, strong nonwoven web having particular utility as a liner for disposable diapers and catamenial devices.

Abstract: A moulding composition comprising (a) a melamineformaldehyde resin having a molar ratio of melamine to formaldehyde in the range 1:1.5 to 1:2.5 which upon hardening is capable of withstanding heating at 200.degree. C concerned for 2 hours in air without causing significant structural damage or color change to moulded articles made from moulding compositions in which it has been incorporated, (b) an accelerator derived from a mono- or dibasic organic acid, (c) an inorganic filler having low adsorption characteristics and an oil adsorption value of 10 to 40, (d) a further inorganic filler and (e) an external lubricant comprising at least one carboxyorganosiloxane esterified with an alcohol containing up to 4 carbon atoms and the process of preparing said moulding compositions.

Abstract: The mold release properties of a molded polyurethane foam are improved by including in the foamable reaction mixture to be molded a reaction product of a ricinoleic acid and a long chain fatty acid.

Abstract: A continuous casting process and apparatus for a liquid polymerizable composition comprising a pair of endless belts which are arranged such that the lower run of the upper belt is disposed above the upper run of the lower belt and said runs are caused to move in the same direction at substantially the same speed; feeding a liquid polymerizable composition into a space defined between said runs; feeding at least one continuous gasket into said space, together with said composition, in such a manner that said gasket is passed between and in contact with the opposing surfaces of each of the opposite edges of said belts to provide a pair of seals which circumscribe said edges of the moving belts; subjecting said composition to partial polymerization to such an extent that the viscosity of said composition in terms of poise is within the range of 2 to 5 determined by a common logarithm of said viscosity at the temperature of polymerization; leading said partially polymerized composition in a path which is arrange

Abstract: The mold release properties of a molded polyurethane foam are improved by including the foamable mixture to be molded, a reaction product of a polysiloxane and an organic monoisocyanate or polyisocyanate.

Abstract: A typical phosphatide is lecithin. This invention relates to compositions and methods for forming polyether polyurethanes utilizing organophosphorus compounds selected from the class consisting of phosphatides and compounds of the formulas: ;(RO).sub.n R'.sub.3-n P(O)and(RO).sub.n R'.sub.3-n Pwherein R is a monovalent hydrocarbon group of at least 8 carbon atoms, R' is selected from the class consisting of hydrogen, hydroxyl and monovalent hydrocarbon groups, and n is an integer of 1 to 3, to impart the property of self-release from metal substrates, e.g., the walls of mold cavities in which they are formed and molded.

Abstract: The mold release properties of a molded polyurethane foam are improved by including in the foamable reaction mixture to be molded a reaction product of a polysiloxane and a monocarboxylic acid or polycarboxylic acid.

Abstract: The method of preparing adjuvant-free tablets from a tableting mass having a tendency to stick, comprising alternately in the same mold forming tablets from said tableting mass and from an adjuvant mass containing an easily tableted substance, a lubricant and a mold parting agent. The lubricant may be talc or sodium benzoate present in about 5 to 20% by weight, and the mold release agent may be stearic acid, a stearate, paraffin or a silicone oil in about 0.5 to 10% by weight. By this method tablets of pure fructose can be formed.

Abstract: The mold release properties of a molded polyurethane foam are improved by including in the foamable reaction mixture to be molded a salt of a polysiloxane which contains amino groups and a fatty acid.

Abstract: Reinforced plastics containing an addition of from 0.05 to 2% w/w of a styrene oligomer.

Abstract: As lubricants for processing poly(vinyl chloride), there are used polyolefin oxidates having a content of from 20 to 80 weight % of dicarboxylic acids, an acid number of from 30 to 150 and a saponification number of from 40 to 220. Partial esters and salts of the indicated polyolefin oxidates are also appropriate. Shaped articles made from a PVC containing these lubricants have a very high degree of transparence.

Abstract: Process for the production of non-woven textile fabric from non-woven fabric waste material in which the waste is mechanically reduced to a particle size of less than three-fourth inch, preferably less than one-half inch and more preferably to a size of three-sixteenth to three-eighth inch, and reused, preferably as a blend with fibers (e.g., virgin or conventionally reclaimed) three-fourth inch or greater in length, to form the non-woven fabric. Addition of binding material other than that already contained in the waste is normally not necessary.Process for recycling and reclaiming non-woven textile waste by mechanically reducing the size of such waste by mechanically reducing the particle size of the fabric waste to less than three-fourth inch, preferably by first cutting it with cutters and then hammer milling the cut waste in a hammer mill having a sized screen through which the hammered cut waste is forced.

Abstract: A terpolymer plastic lens having equal or greater light transmission, greater hardness and scratch resistance equal to the monomers used in prior art plastic lenses is obtained by the co-polymerization of diethylene glycol bis (allyl carbonate), methyl methacrylate and methacrylic acid or acrylic acid.