Abstract: Improved polymer blend composition having improved processibility and comprising:(a) a major portion of a difficultly melt-processible polymer, and(b) a minor portion of:(1) at least an effective amount, to improve processibility, of a fluorocarbon copolymer which at the melt-processing temperature of (a) is either in a melted form if crystalline, or is above its glass transition temperature if amorphous, and(2) at least an effective amount, to improve processibility, of at least one tetrafluoroethylene homopolymer or copolymer of tetrafluoroethylene and at least one monomer copolymerizable therewith, wherein the mole ratio of fluorine to hydrogen is at least 1:1, and which is solid at the melt processing temperature of (a),said composition further characterized in that it contains an abrasive inorganic filler that retards the processibility of (a) in the presence of (b)(1) and (b)(2), the improvement consisting of minimizing the retarding effect of the inorganic filler by employing (b)(1) having an apparent

Abstract: A curable adhesive composition comprises a thermoplastic fluoropolymer, an elastomeric fluoropolymer, an ethylene copolymer and a crosslinking component. The composition preferably also comprises a tackifier. The crosslinking component preferably comprises a free radial generator such as a peroxide and a co-crosslinking agent comprising a multifunctional monomer. The adhesive is particularly useful with heat recoverable articles and bonds exceptionally well to fluoropolymer substrates.

Abstract: New blends of fluorinated thermoplastic elastomers are disclosed that contain a two-phase composition including a continuous phase of a melt processible crystalline thermoplastic fluorocarbon resin and a dispersed phase of an amorphous crosslinked fluoroelastomer, and a dispersion-process-produced, non-fibrillating, non-melt-processible polytetrafluoroethylene (PTFE) powder. The PTFE copolymer is made up of recurring units of hexafluoropropylene, perfluoro(alkyl vinyl ether) wherein the alkyl group has 1-4 carbon atoms, and mixtures thereof. The PTFE compounds uniformly with the two-phase composition without forming visible agglomerates. Poly(phenylene sulfide) powder can be added to the blend to increase melt flow characteristics. Additionally, an uncured fluoroelastomer can be incorporated into the blend to enhance its mechanical properties.

Abstract: A vulcanizable rubber composition comprising (1) 100 parts by weight of a polymer composition comprising(I) a vinylidene fluoride resin,(II) at least one rubber selected from the group consisting of acrylic rubbers, .alpha.,.beta.-unsaturated nitrile-conjugated diene copolymer rubbers and hydrides of .alpha.,.beta.-unsaturated nitrile-conjugated diene copolymer rubbers, said acrylic rubber consisting of (A) 30 to 99.9% by weight of an alkyl acrylate and/or an alkoxy-substituted alkyl acrylate, (B) 0.1 to 10% by weight of a crosslinkable monomer and (C) 0 to 70% by weight of another ethylenically unsaturated compound copolymerizable with (A) and (B) (the sum of (A), (B) and (C) is 100% by weight) and said .alpha.,.beta.-unsaturated nitrile-conjugated diene copolymer rubber consisting of (D) 10 to 60% by weight of an .alpha.,.beta.

Abstract: Dispersion-process-produced, non-melt-processible, particulate, core-shell, tetrafluoroethylene copolymer comprising recurring units of tetrafluoroethylene and modifying recurring units of at least one ethylenically unsaturated comonomer that is copolymerizable with the tetrafluoroethylene, the number of recurring units of comonomer in the shell being sufficient to enable the copolymer to compound uniformly with an elastomer or plastic without forming visible agglomerates, and blends thereof with elastomeric and plastic resins.

Abstract: A polymer composition comprising (1) a polyether polyol which is a product obtained by the free radical addition of a fluoro-olefin of the general formula: ##STR1## wherein Y represents F or fluoroalkyl and Z represents Cl or F(CF.sub.2)m--wherein m is an integer from 0 to 10 or Y and Z together form a (CH.sub.2)p--chain wherein p represents an integer from 2 to 4, to a polytetramethylene gylcol having a molecular weight in the range 162 to 5000 and (2) at least one acrylic polymer. The composition is useful for coating compositions or for the fabrication of films.

Abstract: A coating composition comprising:(A) a fluorine-containing copolymer having a fluorine content based on fluoroolefin of at least 10% by weight, and(B) a fluorine-containing copolymer of a polyfluorocarbon chain-containing monomer with a hydrophilic group-containing monomer.

Abstract: The granular powder of a melt processable fluorine-containing resin which is an agglomerate comprising particles of the melt processable fluorine-containing resin having an average particle size of not more than 200 .mu.m and a tetrafluoroethylene polymer as a binder is described. The agglomerate has an average particle size of not more than 1000 .mu.m and a bulk density of not less than 0.3 g/cm.sup.3. The granular powder has an excellent flowability, crushing resistance and processability as materials for powder coating and roto-molding of powder.

Abstract: Dispersion-process-produced, non-melt-processible, particulate, core-shell, tetrafluoroethylene copolymer comprising recurring units of tetrafluoroethylene and modifying recurring units of at least one ethylenically unsaturated comonomer that is copolymerizable with the tetrafluoroethylene, the number of recurring units of comonomer in the shell being sufficient to enable the copolymer to compound uniformly with an elastomer or plastic without forming visible agglomerates, and blends thereof with elastomeric and plastic resins.

Abstract: Polymer blend composition having improved processibility and comprising:(a) a major portion of a difficultly melt-processible polymer, and(b) a minor portion of:(1) at least an effective amount, to improve processibility, of a fluorocarbon copolymer which at the melt-processing temperature of (a) is either in a melted form if crystalline, or is above its glass transition temperature if amorphous, and(2) at least an effective amount, to improve processibility, of at least one tetrafluoroethylene homopolymer or copolymer of tetrafluoroethylene and at least one monomer copolymerizable therewith, wherein the mole ratio of fluorine to hydrogen is at least 1:1, and which is solid at the melt-processing temperature of (a);masterbatches comprised of the processing aid; and processes utilizing the processing aid.

Abstract: A novel adhesive is described, consisting of a matrix-matrix polyblend of polymer components useful in an adhesive tie layer to bond incompatible polymer layers. The adhesives are a blend of the components making up the incompatible polymer layers themselves, or polymers substantially similar to these, and are melt processed to produce a matrix-matrix morphology with mechanical interlocking of the polymer components that is maintained upon cooling. Additives may be provided in one or both adhesive components to improve the cohesive strength of the adhesive formed by the mechanical interlocking.

Abstract: Composition, optionally curable, comprising a fluorocopolymer admixed with an acrylic polymer, where the fluoropolymer comprises units of a fluorolefine (e.g. TFE) and fluoroallylether (e.g. tetrafluororallylether).

Abstract: A novel antiwicking composition is provided for which comprises a fluorinated ethylene/propylene copolymer, a polymeric fluoroaliphatic ester, a liquid carrier, and a dispersant. Preferably, the novel antiwicking compositions also comprise a wetting/saturating agent. A method for imparting antiwicking properties to a fabric also is provided for, which method comprises applying the novel antiwicking compositions to the fabric. Additionally, fabrics having more universal resistance to wicking are provided for, which nonwicking fabrics comprise fabrics treated with the novel antiwicking compositions.

Abstract: A polymer blend of 2-80 wt % of an acrylic or methacrylic ester base polymer and the balance of a ternary copolymer of vinylidene fluoride (VDF), hexafluoroacetone (HFA) and tetrafluoroethylene (TFE) is very high in transparency and serves as a thermoplastic resin useful for optical purposes. The first polymer of the blend can be selected from homopolymers and copolymers of C.sub.1 -C.sub.4 alkyl acrylates and methacrylates. The second polymer is preferably made up of 2-15 mol % of HFA, 5-60 mol % of TFE and the balance of VDF. The polymer blend has a relatively low index of refraction, which can be controlled by selecting the first and second polymers and/or by varying the blending ratio. The polymer blend is soluble in various organic solvents. Besides, the polymer blend serves as a thermochromic material that becomes opaque by heating and resumes transparency by cooling.

Abstract: A cladding material for plastic optical fiber comprising a vinylidene fluoride-trifluoroethylene-hexafluoroacetone copolymer which comprises 3.5 to 6.5% by mole of hexafluoroacetone units, a molar ratio of vinylidene fluoride unit to trifluoroethylene unit of 3 to 6:1, and a melt index of 10 to 60 g/10 min, and a plastic optical fiber comprising said cladding material and a methyl methacrylate homopolymer or copolymer which comprises over 50% by weight of methyl methacrylate units as the core material.

Abstract: A vulcanizable rubber composition comprising (1) 100 parts by weight of a polymer composition comprising(I) a vinylidene fluoride resin,(II) at least one rubber selected from the group consisting of acrylic rubbers, .alpha.,.beta.-unsaturated nitrile-conjugated diene copolymer rubbers and hydrides of .alpha.,.beta.-unsaturated nitrile-conjugated diene copolymer rubbers, said acrylic rubber consisting of (A) 30 to 99.9% by weight of an alkyl acrylate and/or an alkoxy-substituted alkyl acrylate, (B) 0.1 to 10% by weight of a crosslinkable monomer and (C) 0 to 70% by weight of another ethylenically unsaturated compound copolymerizable with (A) and (B) (the sum of (A), (B) and (C) is 100% by weight) and said .alpha.,.beta.-unsaturated nitrile-conjugated diene copolymer rubber consisting of (D) 10 to 60% by weight of an .alpha.,.beta.

Abstract: Vulcanizable compositions of fluoroelastomers based on vinylidene fluoride with one or more monomers containing an ethylenic unsaturation and at least one fluorine atom, which utilize as a cross-linking agent a dihydroxypolyfluoroether having a molecular weight of from 360 to 2000.

Abstract: A plastic-clad light-transmitting fiber consisting essentially of a core of quartz glass or optical glass and a clad of plastic material, characterized in that said clad of plastic material is a cured body of a solvent-soluble fluoroolefin polymer having curable sites.

Abstract: A copolymer comprising 50 to 90% by weight of the constituting unit derived from (a) a polymerizable compound having a perfluoroalkyl group of 4 to 20 carbon atoms, 10 to 50% by weight of the constituting unit derived from (b) cyclohexyl or benzyl ester of acrylic acid or methacrylic acid and 0.1 to 10% by weight of the constituting unit derived from (c) at least one selected from the group consisting of polyethylene glycol diacrylate of the formulaCH.sub.2 .dbd.CRCOO(CH.sub.2 CH.sub.2 O)rCOCR.dbd.CH.sub.2wherein R is hydrogen atom or methyl, r is an integer of 1 to 50, and N-methylolacrylamide. The copolymer is useful as an oil and water repellent composition.

Abstract: Disclosed is a highly weather-resistant electrodeposition coating composition which is obtained by neutralizing a mixture of an acrylic polycarboxylic resin having an acid value of from 30 to 100 and fluorocarbon polymers with ammonia or an organic amine, melting point of said fluorocarbon polymers being not higher than a heating temperature for curing a film formed from the electrodeposition coating composition, and which is preferably applied to aluminum building materials.

Abstract: The invention is an optical fiber having a core formed of either an inorganic glass or an organic polymer such as polymethyl methacrylate and a cladding layer formed of a ternary copolymer of vinylidene fluoride, hexafluoroacetone and either trifluoroethylene or tetrafluoroethylene. This cladding material is superior particularly in transparency and flexibility.

Abstract: Free-flowing granular compositions based on fluoroelastomers containing dispersed on their surface, as an anti-caking agent, from 5% to 70% by weight of a polyolefine powder.

Abstract: Disclosed is a multicomponent resin composition which is essentially a blend of three polymers, each of which may be a copolymer, and undergoes a change in light transmittance and color with temperature. The first and second polymers are chosen in combination such that a blend thereof exhibits a phase diagram in which a lower critical solution temperature appears, and the third polymer is one which has mutual solubility, at least partially, with either or both of the first and second polymers. For example, polymethyl methacrylate and a copolymer of vinylidene fluoride and hexafluoroacetone, as the first and second polymers, and polyvinyl acetate are blended together. The phase separation temperature or coloring temperature of the multicomponent resin composition depends on the amount of the third polymer, and opacifying and coloring of the resin composition caused by heating become irreversible by cooling when the amount of the third polymer is sufficient.

Abstract: A composition and method for preparing it is disclosed. The composition in a blend of a cured fluoroelastomer which except for the cure sites is a perfluorocarbon and a thermoplastic copolymer of tetrafluoroethylene which is present as generally spherical particles having a particle size of less than 10 microns. The composition is prepared by blending the fluoroelastomer and thermoplastic copolymer at a temperature above the melting point of the thermoplastic copolymer followed by curing the fluoroelastomer.

Abstract: A soil release composition comprising:(A) a polymer comprising 10 to 100% by weight of constituting units of the formula: ##STR1## wherein R.sub.f is a C.sub.3 --C.sub.21 fluoroalkyl group; R.sup.1 is a hydrogen atom or a C.sub.2 --C.sub.4 acyl group; R.sup.2, R.sup.3, R.sup.4 and R.sup.5 are, the same or different, each a hydrogen atom, a methyl group or an ethyl group; A is a group of the formula: --CH.sub.2 CH(OR.sup.1)CH.sub.2 --OCO-- which R.sup.1 is the same as defined in the above, --CO--, --(CH.sub.2).sub.k N(R.sup.2)CO-- in which R.sup.2 is the same as defined in the above and k is an integer of 1 to 10, or --(CH.sub.2).sub.

Abstract: This invention provides a method of dispersing a fluoroplastic in a polymer composition. The method comprises the steps of comminuting the fluoroplastic to a uniform dispersion, admixing with the fluoroplastic a finely divided solid adherent material that will coat at least a portion of said fluoroplastic to form a coated fluoroplastic and combining said coated fluoroplastic with a polymer using intensive mixing means.

Abstract: A fluorine-containing copolymer comprising chlorotrifluoroethylene, 2,2,3,3-tetrafluoropropyl vinyl ether and 0 to 25% by mole of a vinyl ether having a functional group selected from the group consisting of hydroxyl group, glycidyl group and amino group. The fluorine-containing copolymer has a good compatibility with methyl methacrylate polymers and gives, in combination use with methyl methacrylate polymers, products such as coating film, self-supporting film and molded article, which have good stain resistance and transparency.The fluorine-containing copolymer is preferably an alternating copolymer comprising chlorotrifluoroethylene and 2,2,3,3-tetrafluoropropyl vinyl ether.

Abstract: A thermoplastic resin composition useful for optical purposes is obtained by blending a polymer of an acrylic ester with a copolymer of vinylidene fluoride (VDF) and hexafluoroacetone (HFA). The blending ratio is not limited, though very good transparency is ensured when the acrylic ester polymer amounts to at least 20 wt %. It is preferable to use a polymer of an acrylic ester with an alkyl alcohol having not more than 4 carbon atoms. When using the resin composition in optical fibers or cylindrical lenses it is suitable to use a VDF/HFA copolymer containing not more than 20 mol % of HFA. The refractive index of a member formed of the resin composition is lower than that of the acrylic ester polymer and falls in the range of about 1.37-1.48. The resin composition is soluble in various organic solvents and accordingly can be used for adhesing and coating purposes too. Besides, this resin composition serves as a thermochromic material.

Abstract: In this invention the extrusion rate of melt extrudable thermoplastic perfluorocarbon polymers is enhanced by the addition of up to 1% by weight of a hydrocarbon polymer.

Abstract: An oil- and heat-resistant rubber composition comprising a nitrile group-containing hydrocarbon rubber having an iodine number of not more than 120 and a fluorine-containing rubber.

Abstract: An elastomeric composition comprising an elastomer matrix having dispersed therein about 3-30 parts per 100 parts by weight of the elastomer of powdered polytetrafluoroethylene having a number average molecular weight of at least about 250,000 and a surface area of at least 1 m.sup.2 /g which has been treated with about 50-120% of sodium-naphthalene addition compound or another addition compound of an alkali metal required for the alkali metal to react with all the fluorine atoms on the surface of the polytetrafluoroethylene powder.By dispersing such treated polytetrafluoroethylene powder in elastomer matrix, one increases significantly the tear strength of the elastomer, while increasing its modulus only moderately. In this way, the processability of the elastomeric compositions is not adversely affected.

Abstract: A fluorine-containing copolymer comprising chlorotrifluoroethylene, 2,2,3,3-tetrafluoropropyl vinyl ether and 0 to 25% by mole of a vinyl ether having a functional group selected from the group consisting of hydroxyl, glycidyl and amino. The fluorine-containing copolymer has a good compatibility with methyl methacrylate polymers and gives, in combination with methyl methacrylate polymers, products such as coating film, self-supporting film and molded article, which have good stain resistance and transparency.

Abstract: A fluoro-resin coating composition curable at room temperature and capable of providing coatings having an improved transparency or gloss which can be maintained for a long term, as well as excellent weatherability, chemical and solvent resistances, stain resistance and adhesion to substrates, which comprises a fluorine-containing copolymer comprising vinylidene fluoride and a minor amount of a vinyl monomer having a functional group capable of causing crosslinking at room temperature in the presence of a curing agent having at least difunctionality, and an acrylic resin.

Abstract: A fluororubber-based composition comprising a mixture of 100 parts by weight of fluororubber and 10 to 100 parts by weight of an ethylene-vinyl acetate copolymer having a vinyl acetate content of 10 to 30% by weight or an ethylene-ethyl acrylate copolymer having an ethyl acrylate content of 8 to 20% by weight. The product obtained from the composition has high heat resistance and oil resistance and is useful for production of heat-shrinkable products having excellent heat setting properties.

Abstract: Mixtures of (1) a polymer of at least one polyfluoroalkyl acrylate or methacrylate and (2) a copolymer of (a) at least one polyfluoroalkyl acrylate or methacrylate, (b) at least one 3-chloro- (or 3-bromo-) 2-hydroxypropyl acrylate or methacrylate, (c) at least one alkyl acrylate or methacrylate and (d) at least one polyoxyethylene acrylate or methacrylate. Mixtures are prepared by first polymerizing (1) and then (2) (a)-(d). Mixtures are useful as oil- and water-repellents, particularly for rainwear.

Abstract: A solvent-born coating composition and process for wet-on-wet application to a metal substrate comprises a fluorocarbon resin, an acrylic resin, and various flow modifiers such as benzoguanamine resins, blocked isocyanates or polymeric urethanes. Such coatings used as a primer composition in conjunction with a fluorocarbon-containing topcoat impart improved corrosion resistance, substrate and intercoat adhesion and improved edge pullaway properties.

Abstract: A fluoroplastic resin dispersion is modified by the addition of a fluoroelastomer latex to yield a fluid coating or casting composition. The fluoroplastic resin dispersion, preferably an aqueous dispersion of a perfluoroplastic, such as polytetrafluoroethylene (PTFE), is modified by blending with a fluoroelastomer composition, preferably a latex, such that the fluoroplastic comprises up to about 95%, preferably up to about 90%, by weight of the invention composition. The fluoroelastomer component comprises at least about 5% by weight of the blend. The fluid compositions according to the invention may preferably comprise from about 10-95% by weight fluoroplastic and from about 5-95% fluoroelastomer.

Abstract: Mixture of tetrafluoroethylene/hexafluoropropylene (TFE/HFP) copolymers comprising 5 to 20% by weight of hexafluoropropylene, the specific melt viscosity at 380.degree. C. of which is from 1.times.10.sup.4 to 60.times.10.sup.4 poise,(a) the melt flow ratio being at least 3.5, and(b) the zero strength time (ZST, second) at 380.degree. C. satisfying the following equation:ZST.gtoreq.1/3x.sup.2 +17x+107wherein x is (specific melt viscosity).times.10.sup.-4 having an improved extrudability, particularly an improved extrusion speed. These mixtures of copolymers contain a high specific melt viscosity portion and a low specific melt viscosity portion.

Abstract: Fiber reinforced perfluoroelastomer parts having high multidirectional tear strength are prepared by blending the fiber with the elastomer, pulverizing the blend into a powder, and molding and press-curing the powder into the desired shape.

Abstract: An aqueous release coating composition comprising a perfluorinated ester polymer and a film-forming polymer is described.

Abstract: A methacrylate resin composition for optical information recording medium, excellent in releasability from mold, consisting of (A) 100 parts by weight of a methacrylate resin and (B) 0.1 to 3.0 parts by weight of a surface active agent having a fluoroalkyl group.

Abstract: An elastomeric composition comprising an elastomer matrix having dispersed therein about 3-30 parts per 100 parts by weight of the elastomer of powdered polytetrafluoroethylene having a number average molecular weight of at least about 250,000 and a surface area of at least 1 m.sup.2 /g which has been treated with about 50-120% of sodium-naphthalene addition compound or another addition compound of an alkali metal required for the alkali metal to react with all the fluorine atoms on the surface of the polytetrafluoroethylene powder.By dispersing such treated polytetrafluoroethylene powder in elastomer matrix, one increases significantly the tear strength of the elastomer, while increasing its modulus only moderately. In this way, the processability of the elastomeric compositions is not adversely affected.

Abstract: A release agent comprising (A) a polymer of at least one vinyl monomer of the general formulaCH.sub.2 .dbd.CR.sub.1 COO(CH.sub.2 CHR.sub.2 O).sub.n CONHR (I)wherein R.sub.1 and R.sub.2, independently from each other, represent hydrogen or a methyl group, R represents an alkyl group having at least 12 carbon atoms or a fluoroalkyl group having at least 6 carbon atoms, and n is an integer of from 1 to 6,(B) a copolymer of at least one vinyl monomer of general formula (I) above and another compound copolymerizable therewith, or a mixture of said polymer (A) and said copolymer (B); and a product prepared by coating the said release agent on a non-adhesive surface of an adhesive article having an adhesive surface and the non-adhesive surface or on the surface of a release paper.

Abstract: 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 polyvinylidene fluoride, or a copolymer of tetrafluoroethylene with perfluoroalkyl vinyl ether, hexafluoropropylene, ethylene, or trifluorochloroethylene.

Abstract: Improved resin reinforced, asbestos diaphragms for use in chlor-alkali cells and their method of manufacture are disclosed.

Abstract: A composition for coating on low pressure sliding connections to enhance electrical contact comprises an admixture of an anhydride copolymer; a flexibilizing copolymer; a hydrophobic, soluble, compatible fluoroaliphatic radical-containing composition; an antioxidant; optionally a mercaptan; and a suitable solvent system. Articles coated with the contact enhancing composition are disclosed.

Abstract: An insulative coating composition for providing water-repellancy to and protecting communication wire comprises an admixture of an anhydride copolymer, a flexibilizing copolymer, a suitable solvent system, a hydrophobic, soluble, compatible fluoroaliphatic radical-containing composition and optionally, a mercaptan, and optionally, an antioxidant. Articles coated with the insulative composition are disclosed.

Abstract: Co-vulcanizable fluoroelastomer blends of tetrafluoroethylene/perfluoro-(methylvinyl-ether)/cure-site monomer terpolymer and hexafluoropropylene oxide/cure-site monomer dipolymer.

Abstract: Polymeric fibers are formed from solution by the influence of polymeric seeding materials under conditions of simultaneous cooling and agitation.

Abstract: A coating composition useful for providing a substrate with a coating having a textured appearance is composed of, on a resin solids basis, a resinous mixture of:(a) from about 40 percent to about 85 percent by weight of a film-forming fluorocarbon resin having a particle size of from about 0.1 microns to about 5 microns;(b) from 0 percent to about 50 percent by weight of an acrylic resin selected from polymers and copolymers of acrylic acid or methacrylic acid esters and copolymers of acrylic monomers containing hydroxyl or amide groups; and(c) from about 3 percent to about 50 percent by weight of particulate fluorocarbon resin having a particle size ranging from about 20 microns to about 3500 microns, said particulate fluorocarbon resin being fused with the film-forming fluorocarbon resin upon curing to provide said textured appearance.The aforesaid coating composition can be either a clear or pigment coating composition.