Central Glass Company, Limited

Chikashi Kawashima

Seiiti Minegishi

Katunori Kawamura

Akira Ishihara

Takashi Yasumura

Sunao Koga

Fumiyoshi Yoshikawa

Shinji Ogasawara

Isao Tanaka

Kazuhiko Yamamoto

Satoshi Nakahata

Yasufumi Koga

Shuichi Inoue

Seiichi Katsuragawa

Takashi Mukaino

Seiichi Yoshida

Kazumi Nejigaki

Tomio Masaki

The invention provides a thermoplastic fluorine-containing resin composition intended to be passed between at least two rollers of a calender to be thinned into a sheet or film. This composition includes: 100 parts by weight of a mixture containing 10-90 wt % of a fluorine-containing elastomeric polymer having a glass transition temperature below room temperature and 90-10 wt % of a fluorine-containing crystalline resin having a melting point not higher than 300.degree. C.; and 0.05-2.0 parts by weight of an agent for releasing the composition from the at least two rollers. The composition has a good melt characteristic and a good elasticity for calendering of the composition, and a good releasibility from a calender roller in calendering of the composition.

Thermoplastic fluorine-containing resin composition useful for

The invention relates to an elastic fluorohydrocarbon resin. This resin is obtained by graft copolymerization of a first segment which is one of fluorine-containing elastomeric and crystalline polymers with a second segment which is the other of these polymers. The first segment is prepared by copolymerizing at least one first unsaturated monomer that has peroxy bond with at least one second fluorine-containing monomer. When the first monomer is dissolved in a first solvent prior to the copolymerization, the copolymerization can be safely conducted with higher yield. This first solvent is selected from a carboxylic ester of t-butanol, methylene chloride, 1,1,1-trichloroethane, and first, second, third and fourth compounds which are respectively represented by R.sup.1 COOR.sup.2, C.sub.2 H.sub.x Cl.sub.y F.sub.z, C.sub.3 H.sub.x Cl.sub.y F.sub.z, and C.sub.4 H.sub.x Cl.sub.y F.sub.z. When the fluorine-containing elastomeric copolymer as the first segment is purified by contact with a barium salt prior to the graft copolymerization, the elastic fluorohydrocarbon resin becomes improved in thermal stability. When the fluorine-containing elastomeric copolymer having a water content of 0.1-50 wt % as the first segment is dispersed in a liquid medium containing t-butanol and water, it becomes unnecessary to dry this elastomeric copolymer prior to the graft copolymerization. When the fluorine-containing elastomeric copolymer as the first segment is dispersed in another liquid medium containing t-butanol, water, a carboxylic ester and barium hydroxide, the elastic fluorohydrocarbon resin becomes improved in thermal stability with higher graft copolymerization rate.

Elastic fluorohydrocarbon resin and method of producing same

The invention provides a fluorine-containing resin blend. This resin blend includes 100 parts by weight of a first resin and 1-50 parts by weight of a second resin. The first resin is one of an elastic fluorohydrocarbon resin and a vinylidene fluoride based resin. The second resin is a graft copolymer prepared by graft copolymerization of a rubber-like polymer with a first monomer and an optional second monomer. The first monomer is at least one of an acrylic ester and a methacrylic acid ester. The optional second monomer is at least one copolymerizable monomer other than the first monomer. When the elastic fluorohydrocarbon resin is used as the first resin, the resin blend is improved in extensibility upon molding in a melted condition and lowered in modulus of elasticity under a condition that the resin blend is strained by up to 20%, without impairing the elastic fluorohydrocarbon in its heat resistance, low-temperature characteristics and the like. When the vinylidene fluoride based resin is used as the first resin, the resin blend is improved in mechanical strength at low temperature, without impairing superior characteristics of the vinylidene fluoride based resin.

Elastic fluorohydrocarbon resin-based polymer blend with graft

An adhesive for bonding together a first substrate made of vinylidene fluoride resin and a second substrate comprises an elastic fluorohydrocarbon resin, a polyisocyanate, and an organic solvent. This elastic fluorohydrocarbon resin is obtained by graft copolymerization of a fluorine-containing copolymer with a vinylidene fluoride monomer. This copolymer is prepared by copolymerizing at least one first fluorine-containing monomer with at least one unsaturated monomer that has peroxy bond. The adhesive itself is superior in durability, and bond strength between the first and second substrates is also superior.

Adhesive for bonding together vinylidene fluoride resin and substrate

A plastic laminate having an apliphatic polyamide resin surface layer and a fluororesin surface layer is produced by using an intermediate layer formed of a blend of an aliphatic polyamide resin with a fluorine-containing graft copolymer, which is obtained by graft polymerization of a suitable monomer such as vinylidene fluoride, or a mixture of monomers, with an elastomeric copolymer of at least two principal monomers including at least one fluorine-containing monomer, e.g. vinyliden fluoride and chlorotrifluoroethylene, and an unsaturated peroxy compound. The fluorine-containing graft copolymer is a soft, flexible resin and is well compatible with aliphatic polyamide resins and also with various fluororesins. The fluororesin surface layer uses, for example, polyvinylidene fluoride, a vinyliden fluoride based copolymer or the fluorine-containing graft copolymer. The lamination can be accomplished by simply welding the two surface layers to the intermediate layer. The laminate can be produced in tubular form by a coextrusion method and can be used, for example, as an automotive fuel hose.

Plastic laminate having polyamide resin surface layer and fluororesin

A thermoplastic resin composition, which is flexible and can easily be extruded, is obtained by blending (A) 100 parts by weight of a thermoplastic urethane elastomer with (B) 1-100 parts by weight of a thermoplastic graft copolymer obtained by graft polymerization of vinylidene fluoride with an elastomeric copolymer of at least two principal monomers including at least one fluorine-containing compound, e.g. vinylidene fluoride and chlorotrifluoroethylene, and an unsaturated peroxy compound. Compared with the urethane elastomer (A) itself, this resin composition is better in extrudability, lower in kinetic friction coefficient, weaker in surface tackiness of molded products and higher in resistance to heat aging.

Urethane elastomer based thermoplastic resin composition suitable for

A glass fiber reinforced flexible composite material is obtained by dispersing or embedding glass fiber in a fluororesin, which is a graft copolymer obtained by grafting a crystalline fluoro-polymer to an elastomeric fluoro-polymer. For example, the graft copolymer is obtained by graft polymerization of vinylidene fluoride with an elastomeric copolymer of vinylidene fluoride, chlorotrifluoroethylene and an unsaturated peroxy compound. The composite material possesses the physical and chemical properties characteristic of fluororesins and is flexible and easily melt processable. Sheets of this composite material using a glass fiber cloth have a soft feel and can easily be joined by high-frequency welding.

Glass fiber reinforced flexible composite material using soft fluororesin

A melt-processable fluororesin of wide use is obtained by blending 100 parts by weight of a soft and melt-processable fluorine-containing graft copolymer in which crystalline fluoro-polymer segments are grafted to an elastomeric fluoro-polymer segment and 1-90 parts by weight of a crystalline fluoro-polymer which comprises the structural units of the crystalline fluoro-polymer segments of the graft copolymer. For example, a graft copolymer obtained by graft copolymerization of vinylidene fluoride (VDF) with an elastomeric copolymer of VDF, chlorotrifluoroethylene and an unsaturated peroxy compound is blended with either homopolymer of VDF or a copolymer of VDF and another monomer. By the blending some important characteristics of the graft copolymer such as elastic modulus, hardness and melt flow rate are desirably modified without serious lowering of tensile strength and elongation.

Flexible and melt processable fluororesin

The disclosure relates to enhancement of mechanical strength and heat resistance of a graft copolymer which is obtained by graft copolymerization of a fluorine-containing monomer that gives a crystalline polymer, such as vinylidene fluoride, with an elastomeric copolymer having peroxy bond, such as a ternary copolymer of vinylidene fluoride, chlorotrifluoroethylene and an unsaturated peroxy compound. A small amount of triallylisocyanurate is mixed with the graft copolymer, and the mixture is formed into a desired shape by a usual method such as calendering or compression moulding. The shaping material is exposed to ionizing radiation such as gamma-ray, which causes cross-linking of the graft copolymer.

Method of producing shaped body of cross-linked fluorine-containing

A piezoelectric polymeric material in the form of sheet or film, which comprises polymers of vinylidene fluoride (VDF) as principle components. The piezoelectric material is essentially a mixture of 100 parts by weight of a VDF base resin, which may be either poly(VDF) or a copolymer, and 1-100 parts by weight of a copolymer of a fluoroelastomer and either VDF monomer or a monomer mixture containing a major amount of VDF monomer. A sheet or film having a high piezoelectric modulus is obtained by stretching a sheet or film of said mixture at an adequately elevated temperature and polarizing the sheet or film after or during the stretching thereby making the stretching sheet or film an electret.

Piezoelectric polymeric material

A fluorohydrocarbon resin that has elasticity and retains favorable properties of known fluorohydrocarbon polymers is obtained by graft copolymerization of a fluorine-containing elastomeric polymer with a fluorine-containing crystalline polymer. One of the elastomeric and crystalline polymers is prepared by copolymerizing at least one fluorine-containing monomer with at least one unsaturated monomer that has peroxy bond. When the elastomeric polymer is employed as the basic polymer and the crystalline polymer is polyvinylidene fluoride, the graft copolymerized fluorohydrocarbon resin is high in mutual solubility with polyvinylidene fluoride, so that the addition of this resin to polyvinylidene fluoride gives a resin composition which has elasticity and good low temperature characteristics.

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Scarsdale, NY, United States of America

Chikashi Kawashima