Abstract: Permanent aqueous marker inks are provided which include surfactant, a pigment, a film-forming polymer, and water. The surfactant may be a combination of a hydrocarbon, preferably an alkylphenol ethyoxylate and a fluorocarbon, or it may be a silicone.

Abstract: The invention provides shaped, substantially unoriented, compositions of PTFE, having high notched Izod impact resistance, produced in a hot compression molding process wherein heat and pressure are applied simultaneously in a selected temperature range below the melting point of the virgin, as polymerized PTFE powder.

Abstract: An improvement in barrier properties of films and molded articles containing an organic polymer is achieved by incorporation therein of fluorochemicals, fluoropolymers or mixtures thereof, wherein said fluorochemicals or fluoropolymers contain greater than 40% fluorine by weight and exhibit less than 20% weight loss at 165.degree. C., as measured by thermogravimetric analysis at 20.degree. C. per minute in air. The films and molded articles in accordance with the present invention exhibit improved vapor and chemical barrier properties.

Abstract: A fluorine-containing polymer composition comprising a polymer having a functional group and a fluorine-containing aliphatic cyclic structure dissolved in a solvent mixture of an aprotic fluorine-containing solvent and a protic fluorine-containing solvent.

Abstract: Permanent aqueous marker inks are provided which include surfactant, a pigment, a film-forming polymer, and water. The surfactant may be a combination of a hydrocarbon, preferably an alkylphenol ethyoxylate and a fluorocarbon, or it may be a silicone.

Abstract: There are provided a liquid crystal polyester resin composition comprising 100 parts by weight of a liquid crystal polyester, 45 to 80 parts by weight of graphite having an average particle size of 5 .mu.m or more and 0 to 140 parts by weight of talc having an average particle size of 5 .mu.m or more, the total amount of the graphite and the talc being 55 to 185 parts by weight. There are provided a molded article such as a carrier for electronic part, a heat-resistant tray for IC, or the like, which has high heat resistance in soldering, only slight anisotropy and warpage, a surface resistivity of 1.times.10.sup.4 to 1.times.10.sup.8 .OMEGA., and an initial voltage due to electrification and a half-life (a time required for the initial voltage due to electrification to be reduced to one-half) which are controlled to be further reduced; and a liquid crystal polyester resin composition excellent in moldability which gives said molded article.

Abstract: Shaped PTFE compositions are disclosed having low creep which are produced by the application of pressure and elevated temperature. Also disclosed is a process for making shaped compositions with low creep by the application of pressure and elevated temperature.

Abstract: An electrostatic liquid toner imaging process uses a liquid toner comprises a perfluorinated solvent and polymer resin-bound pigment particles. The polymer resin is preferably a resin containing highly fluorinated or perfluorinated units within the polymer resin or a resin comprising of at least 10% perfluorinated units, the rest comprising nonfluorinated units.

Abstract: Copolymers of tetrafluoroethylene (TFE) and hexafluoropropylene (HFP) having high HFP content and end-of-melting temperature, T.sub.m (end), as low as 200.degree. C. are disclosed. Exceptional performance as a processing aid in polyolefins results from having T.sub.m (end) of the TFE/HFP copolymer close to the processing temperature of the polyolefin. These TFE/HFP copolymers are soluble in fluorinated cyclic solvents. Copolymer/solvent systems copolymer at significant concentrations in selected solvents are fluid and stable at room temperature.

Abstract: A halogen group solvent comprising a mixed solvent consisting essentially of bromochloromethane and/or 1,2-dichloroethylene and a co-solvent, wherein the co-solvent is at least one member selected from the group consisting of carbon dioxide, sulfur hexafluoride, difluorochloromethane, 1,1,1,2-tetrafluoroethane, etc., and the content of said co-solvent in the mixed solvent is 3 to 65% by weight; a polyolefin solution using the solvent; and a process for producing a three-dimensional fiber of a polyolefin using the solution.

Abstract: Disclosed herein is a process for dissolving high melting polymers containing tetrafluoroethylene units at pressures greater than autogenous pressure, using selected halogenated solvents that are often not solvents at autogenous pressure. Also disclosed are the solutions resulting from this process. The solutions are useful for preparing fibers and paper-like webs from these polymers.

Abstract: A composition and method for detecting thermal overheating of an apparatus or system and for quickly and accurately locating the portions of the apparatus or system that experience a predetermined degree of such overheating. A composition made according to the invention includes perfluorocarbon tracers (PFTs) mixed with certain non-reactive carrier compounds that are effective to trap or block the PFTs within the composition at normal room temperature or at normal operating temperature of the coated apparatus or system. When a predetermined degree of overheating occurs in any of the coated components of the apparatus or system, PFTs are emitted from the compositions at a rate corresponding to the degree of overheating of the component.

Abstract: Disclosed is a resin composition for a resin-banded bearing comprising from 25 to 65% by weight of a thermoplastic polyester elastomer, from 70 to 20% by weight of a thermoplastic polyester resin, and from 5 to 15% by weight of a filler, based on the total amount of the thermoplastic polyester elastomer, the thermoplastic polyester resin and the filler. The resin composition withstands long-term use at high temperatures of 140 or higher to exert creep-proofing performance in a stable manner.

Abstract: Polishes for metal surfaces, based on dispersions of waxes, fluorinated polymers and perfluoropolyoxyalkylene oils acquire high gloss characteristics combined with improved water-repellency and resistance to soiling of 0.1-5% by weight of at least a cationic emulsifier comprised in the general formulaR--L--Q.sup.+ X.sup.-.sub.t (I)where:R=a chain of perfluoropolyoxyalkylene units;L=a divalent organic group;Q=a polar group;X=a halogen, or a group of formulaCH.sub.3 -Phenylene-SO.sub.3.sup.-R"SO.sub.3 --R"=F-(CF.sub.2).sub.m -;t=1 or 2;m=1-4.The polished containing the emulsifiers of formula (I) as well as the compounds comprised in said formula are claimed as new products.

Abstract: The present invention relates to copolymers which are particularly suitable in coating compositions which are sprayed with compressed fluids which act as viscosity reducing diluents.

Abstract: Perfluorinated cycloalkanes, perfluorinated aromatic compounds and perfluorotrialkyl amines having a critical temperature greater than 150.degree. C. are solvents for certain carboxylic fluorinated polymers having an equivalent weight greater than 900 and dissolve the polymers more readily and completely at low temperatures than previously known solvents. A process for dissolution of the polymers and the solutions that are formed is disclosed. The solutions are useful for making polymer films and ion exchange membranes, particularly membranes for use in chloroalkali cells or fuel cells.

Abstract: A repositionable pressure-sensitive adhesive comprising from about 70% to about 99% solid, polymeric, acrylate, inherently tacky, infusible, solvent-insoluble, solvent-dispersible, elastomeric microspheres comprising at least one alkyl acrylate or alkyl methacrylate ester; and at least one polar monomer, and correspondingly, from about 30% to about 1% of a binder copolymer comprising an elastomeric polymeric backbone having pendant therefrom high Tg polymeric moieties.

Abstract: A vinylidene fluoride-hexafluoroisobutylene copolymer powder is employed to thicken a conventional fluorine-containing liquid lubricant to provide a grease composition which has improved lubrication character in metal bearing subjected to the simultaneous conditions of high load, high speed and elevated temperature.

Abstract: The present invention relates to a thermoplastic hot melt adhesive comprising(a) a block copolymer, said block copolymer being prepared utilizing a bromide based coupling agent, said block copolymer comprising at least two monoalkenyl arene polymer end blocks A and at least one elastomeric conjugated diene polymer mid block B, and said block copolymer having about 8 to about 65 percent by weight of said monoalkenyl arene polymer block content, each polymer block A having an average molecular weight of between about 5,000 and about 125,000, and each polymer block B having an average molecular weight of between about 10,000 and about 300,000,(b) a polyisobutylene rubber,(c) a partially cross-linked polyisobutylene rubber(d) a compatible tackifying resin,(e) a phenolic antioxidant,(f) a non-reactive phenolic resin,(g) a fluorocarbon surface active agent, and(h) a petroleum derived wax.

Abstract: A repositionable pressure-sensitive adhesive comprising from about 70% to about 99% solid, polymeric, acrylate, inherently tacky, infusible, solvent-insoluble, solvent-dispersible, elastomeric microspheres comprising at least one alkyl acrylate or alkyl methacrylate ester; and at least one polar monomer, and correspondingly, from about 30% to about 1% of a binder copolymer comprising an elastomeric polymeric backbone having pendant therefrom high Tg polymeric moieties.

Abstract: An improved process is provided for flash-spinning plexifilamentary film-fibril strands of fiber-forming polyolefin from a small group halocarbon liquids that, if released to the atmosphere, present a greatly reduced ozone depletion hazard, as compared to the halocarbon currently-used commerically for making the strands. The preferred halocarbon for this purpose is 1,1-dichloro-2,2,2-trifluoroethane.

Abstract: Hydrophilic polymers of the type suitable for use in making contact lenses and having a wide range of controllable properties including strength and gas permeability are formed from acrylonitrile or methyl methacrylate or an analogue thereof, 1-vinyl-2-pyrrolidinone and an appropriate amount of a cross-linking agent. Contact lenses (3) having an interferometric pattern thereon are also disclosed.

Abstract: A silicone rubber composition composed of a high-molecular diorganopolysiloxane, a reinforcing silica filler and an organic peroxide as a curing agent is further compounded with a fluorine-containing low-polymeric compound such as poly(chlorotrifluoroethylene) and perfluorinated polyether compound of the formula F--[--CF(CF.sub.3)--CF.sub.2 --O--].sub.v --O--CF.sub.2 --CF.sub.3, in which v is 2 to 100, as well as fluoroalkyl-substituted organopolysiloxanes. The silicone rubber composition can give a cured silicone rubber product having greatly improved resistance against dynamic fatigue as in repeated cycles of stretching and relaxation.

Abstract: The present invention relates to an insulating coating material for an electronic circuit board, an insulating coating layer for an electronic circuit board, and a method for forming such insulating coating layer, and the insulating coating material is a solution comprising a thermoplastic resin and a solvent containing a low boiling solvent, which solution can be prevented from dropping after its application onto the electronic circuit board, and the insulating coating layer is formed using the coating material on the surface of the electronic circuit board having edge portions thereon so that the coating thickness at the edge portions and that at the other portion than the edge portions are almost equal to each other, further, the method for forming such insulating coating layer is characterized by forming the coating layer using the above insulating coating material according to a spray method or a dipping method.

Abstract: Derivatives of diphenylhexafluoropropane having the formula: ##STR1## where R is an unsubstituted or substituted alkylene, an epoxy, a silyl or alkoxysilyl group; and where X and Y are hydrogen or halogen. The derivatives are useful in formulating polymer structures.

Abstract: A chemical composition for use as an anti-glare agent on surfaces, such as television screens and/or glass covered objects such as pictures. The composition includes(a) an organic material dissolvable in a fast evaporating solvent,(b) a fast evaporating solvent for the organic material,(c) a wax material dissolvable in a slow evaporating solvent, and(d) a slow evaporating solvent for the wax material.

Abstract: Silicone rubber matrices are used to contain and dispense volatile, organic liquids. The articles, as dispensors are improved by the addition of a compatibilizing agent to reduce migration of the organic liquid out of the matrix in the form of liquid drops or films. Higher loadings of the organic liquid into the rubber matrix are achieved without syneresis occurring.

Abstract: A coating composition for an elastomeric substrate used in packaging comprising polytetrafluoroethylene and poly n-butyl acrylate in a solvent comprising a blend of a 1,1-trichlorethane and 1,1,2-trichloro-2,2-trafluoroethane, and the coated elastomeric substrate.

Abstract: An aqueous fluorine-containing rubber coating composition comprising (a) fluorine-containing rubber, (b) fluorine-containing resin, (c) an aminosilane compound of the formula: ##STR1## wherein R is methyl or ethyl; X is a single bond or --(CH.sub.2).sub.2 --NH--, --CONH-- or --(CH.sub.2).sub.2 --NH--(CH.sub.2).sub.2 --NH--; and n is 2 or 3, and (d) an aqueous liquid vehicle, the weight ratio of the component (a) and the component (b) being from 95:5 to 35:65, which makes the resultant coating film non-adherent and more lubricous.

Abstract: Aqueous colloidal dispersions of fluorinated polymers can be concentrated, after adding a stabilizing emulsifier, to high solids contents by ultrafiltration over customary semi-permeable membranes if pumps which keep the dispersion free from contact with components which cause frictional forces are used for conveying the dispersion. A considerable proportion of the stabilizing emulsifier added and high proportions of the fluorine-containing emulsifier originally contained in the fluorinated polymer dispersion from the emulsion polymerization can be removed via the aqueous permeate. The fluorine-containing emulsifier can be recovered by a downwstream basic anion exchanger and the stabilizing emulsifier contained in the filtrate flowing out of the anion exchanger can be concentrated in this filtrate by reverse osmosis and optionally recycled into the ultrafiltration process.

Abstract: A writing liquid is formed from a solvent for an organic styrene resin pigment in combination with a chlorofluoroalkane of from 1 to 3 carbon atoms. The potential toxicity of the solvent (or solvent vapors) is eliminated and writing speeds of the writing liquid are improved by the addition of the chlorofluoroalkane. The writing liquid is used for transparentizing an opaque layer of an organic styrene resin pigment, uniformly distributed as fine particles in a film-forming binder carried on a transparent or opaque support. When the writing liquid is applied to the opaque layer using a suitable writing instrument, such as a pen, the opaque layer immediately becomes transparent where it is contacted with the solvent.