Daikin Industries, Ltd.

Daikin America, Inc.

Osaka Soda Co., Ltd.

Takeshi Inaba

Yuuki Kuwajima

Shigehito Sagisaka

Tetsuo Shimizu

Toshiaki Masui

Taketo Kato

Takahiro Kitahara

Takuya Arase

Masakatsu Kitano

Takayuki Araki

Tsuyoshi Noguchi

Takafumi Yamato

Kenji Ichikawa

Tatsuya Higuchi

Yoshihisa Yamamoto

Takeshi Shimono

Hayato Tsuda

Mayuko Taeda

Tomihiko Yanagiguchi

Kazuo Ishiwari

Hirofumi Nishibayashi

Yosuke Nishimura

Hidenori Ozaki

Motoki Kitagawa

Tsuyoshi Ono

Kozue Osawa

Koshiro Hamaguchi

Kozue Komazawa

Shingo Sakakibara

Eisaku Sumino

Yukinori Kamiya

Shinya Murakami

Kyle Brundin

Steve Mariconti

Kuwajima Yuuki

The present invention aims to provide a laminate in which a fluororesin layer and a fluororubber layer are firmly bonded. The present invention relates to a laminate including: a fluororubber layer (A); and a fluororesin layer (B) stacked on the fluororubber layer (A), the fluororubber layer (A) being formed from a fluororubber composition, the fluororubber composition containing a fluororubber, a low molecular weight polytetrafluoroethylene, and a multifunctional compound, the amount of the multifunctional compound being 5 parts by mass or more relative to 100 parts by mass of the fluororubber.

Laminate

The invention provides a laminate including a fluoroelastomer layer and a fluororesin layer which are firmly bonded to each other. The laminate includes a fluoroelastomer layer (A) and a fluororesin layer (B) stacked on the fluoroelastomer layer (A). The fluoroelastomer layer (A) is a layer formed from a fluoroelastomer composition. The fluoroelastomer composition contains a fluoroelastomer, a basic multifunctional compound, and at least one compound (a) selected from the group consisting of a fluororesin (a1) and a phosphorus compound (a2). The compound (a) is present in an amount of 0.01 to 120 parts by mass relative to 100 parts by mass of the fluoroelastomer. The fluororesin layer (B) is formed from a fluororesin (b1) having a fuel permeability coefficient of 2.0 g&#xb7;mm/m/day or lower.

Adding silica particles having specified collective characteristics to a fluororubber formulation enhances direct adhesion between the fluororubber formulation and a copolymer upon curing. Specifically, as measured before being mixed into the fluororubber formulation, the silica particles have an average value of the product '(particle size)&#xd7;(circularity)' that is 17.5 nm or higher and 500 &#x3bc;m or lower. The silica particles may also have an average particle size of between 25.0 nm inclusive and 500 &#x3bc;m inclusive, and an average circularity of 0.80 or higher. Alternatively, as measured after being incorporated into the fluororubber formulation and then cured, the silica particles have an apparent average value of the product '(particle size)&#xd7;(circularity)' that is 32.0 nm or higher and 500 &#x3bc;m or lower. The silica particles may also have an apparent average particle size of between 40.0 nm inclusive and 500 &#x3bc;m inclusive as measured after being incorporated into the fluororubber formulation and then cured.

A laminate including: a rubber layer (A); and a fluororesin layer (B) laminated on the rubber layer (A), the rubber layer (A) being formed of a rubber composition for vulcanization containing: at least one unvulcanized rubber (a1) selected from acrylonitrile-butadiene rubber and its hydride, styrene-butadiene rubber, chloroprene rubber, butadiene rubber, natural rubber, isoprene rubber, ethylene-propylene-termonomer-copolymer rubber, silicone rubber, butyl rubber, and acrylic rubber; at least one compound (a2) selected from 1,8-diazabicyclo(5.4.0)undec-7-ene salts, 1,5-diazabicyclo(4.3.0)-non-5-ene salts, 1,8-diazabicyclo(5.4.0)undec-7-ene, and 1,5-diazabicyclo(4.3.0)-non-5-ene; at least one compound (a3) selected from aldehyde-amine compounds and metal hydrates; magnesium oxide (a4); and silica (a5), the fluororesin layer (B) being formed of a fluoropolymer composition containing a fluoropolymer (b1) having a copolymer unit derived from chlorotrifluoroethylene.

The invention provides a laminate in which a fluororesin layer and a rubber layer are firmly bonded to each other and the fluororesin layer has low fuel permeability and is less likely to suffer solvent cracking. The laminate includes a rubber layer (A) and a fluororesin layer (B). The fluororesin layer (B) contains a copolymer containing a chlorotrifluoroethylene unit, a tetrafluoroethylene unit, and a perfluoroalkyl vinyl ether unit. The copolymer contains 96.0 to 97.4 mol % of the chlorotrifluoroethylene unit and the tetrafluoroethylene unit relative to all the monomer units constituting the copolymer and 2.6 to 4.0 mol % of the perfluoroalkyl vinyl ether unit relative to all the monomer units constituting the copolymer.

Laminate and copolymer

Provided is a fiber-reinforced composite material having a greater maximum stress, maximum elongation, and tensile modulus, which are determined by a tensile test, than conventional fiber-reinforced composite materials containing a fluororesin as a matrix. The invention relates to a fiber-reinforced composite material including a fluororesin and a reinforcing fiber, the fluororesin containing a tetrafluoroethylene unit and a vinylidene fluoride unit, the tetrafluoroethylene unit representing 55 to 95 mol % of all the monomer units constituting the fluororesin, the vinylidene fluoride unit representing 45 to 5 mol % of all the monomer units constituting the fluororesin.

Fiber-reinforced composite material, laminate, pipe, riser pipe, and flow line

A laminate including: a rubber layer (A); and a fluororesin layer (B) laminated on the rubber layer (A), the rubber layer (A) being formed of a rubber composition for vulcanization containing: at least one unvulcanized rubber (a1) selected from acrylonitrile-butadiene rubber and its hydride, styrene-butadiene rubber, chloroprene rubber, butadiene rubber, natural rubber, isoprene rubber, ethylene-propylene-termonomer-copolymer rubber, silicone rubber, butyl rubber, and acrylic rubber; at least one compound (a2) selected from 1,8-diazabicyclo(5.4.0)undec-7-ene salts, 1,5-diazabicyclo(4.3.0)-non-5-ene salts, 1,8-diazabicyclo(5.4.0)undec-7-ene, and 1,5-diazabicyclo(4.3.0)-non-5-ene; at least one compound (a3) selected from dithiocarbamic acid copper salts, aldehyde-amine compounds, and metal hydrates; magnesium oxide (a4); and silica (a5), the fluororesin layer (B) being formed of a fluoropolymer composition containing a fluoropolymer (b1) having a copolymer unit derived from chlorotrifluoroethylene.

The present invention provides a flexible pipe having excellent blister resistance in a high-temperature and high-pressure environment even though including a thick resin pipe. The flexible pipe includes a resin pipe having a thickness of greater than 5 mm. The resin pipe is formed from a resin having a COpermeability coefficient P(CO) of 20&#xd7;10cm&#xb7;cm/cm&#xb7;s&#xb7;cmHg or lower at 150&#xb0; C., a CHpermeability coefficient P(CH) of 10&#xd7;10cm&#xb7;cm/cm&#xb7;s&#xb7;cmHg or lower at 150&#xb0; C., a ratio D(CO)/S(CO) between a COdiffusion coefficient D(CO) and a COsolubility coefficient S(CO) of 3&#xd7;10Pa&#xb7;m/s or higher at 150&#xb0; C., and a ratio D(CH)/S(CH) between a CHdiffusion coefficient D(CH) and a CHsolubility coefficient S(CH) of higher than 15&#xd7;10Pa&#xb7;m/s at 150&#xb0; C.

Flexible pipe

A laminate of a rubber layer (A) and a fluororesin layer (B) on the rubber layer (A), wherein the rubber layer (A) is a layer made of a rubber composition for vulcanization, the rubber composition for vulcanization contains an unvulcanized rubber (a1); at least one compound (a2) selected from the group consisting of a 1,8-diazabicyclo(5.4.0)undec-7-ene salt, a 1,5-diazabicyclo(4.3.0)-non-5-ene salt, 1,8-diazabicyclo(5.4.0)undec-7-ene, and 1,5-diazabicyclo(4.3.0)-non-5-ene; magnesium oxide (a3); and silica (a4), the amount of the compound (a2) is larger than 1.0 part by mass and not larger than 5.0 parts by mass, for each 100 parts by mass of the unvulcanized rubber (a1), the fluororesin layer (B) is a layer made of a fluoropolymer composition, and the fluoropolymer composition contains a fluoropolymer (b1) having a copolymer unit derived from chlorotrifluoroethylene.

It is an object of the present invention to provide a laminated resin molding which comprises a layer of a thermoplastic polymer such as a thermoplastic elastomer and a layer of a thermoplastic resin such as a fluorine-containing ethylenic polymer, is excellent in liquid chemical impermeability, chemical resistance and bacteria resistance, among others, and can be molded by coextrusion without causing foaming or deterioration of the thermoplastic elastomer and, further, has good interlaminar adhesive strength. The invention provides a laminated resin molding comprising a thermoplastic polymer layer (A), a polyamide-based resin layer (B) and a thermoplastic resin layer (C), wherein said thermoplastic polymer layer (A), said polyamide-based resin layer (B) and said thermoplastic resin layer (C) are laminated in that order and firmly adhered to one another, said thermoplastic polymer is to adhere to the polyamide-based resin by thermal fusion bonding, said polyamide-based resin has an amine value of 10 to 60 (equivalents/10g), said thermoplastic resin contains a functional group and is to thereby firmly adhere to said polyamide-based resin by thermal fusion bonding, said functional group contains carbonyl group.

Laminated resin formed body, method for producing laminated resin formed body, and multilayer article

The present invention provides a laminate having an environmental cracking resistance for a fuel and a fuel impermeability and, in addition, higher in productivity. The present invention is a laminate including a chlorotrifluoroethylene copolymer layer (C) and a fluorine-free organic material layer (K), wherein the chlorotrifluoroethylene copolymer has a melt flow rate of 15.0 to 40.0 (g/10 minutes) and contains 15.0 to 25.0 mole percent of chlorotrifluoroethylene units relative to all monomer units.

The present invention provides a fuel tank excellent in strength, low fuel permeability and durability in spite of its being light in weight as well as a method of producing such fuel tank by which the tank can be molded in a complicated shape with ease and at low production cost. The present invention is a fuel tank, produced by joining of at least two discrete parts of a tank and each having a laminate structure comprising a fluororesin layer and a thermoplastic resin layer in such a manner that at least the fluororesin layers of the parts are joined together to form the inner surface layer of the fluororesin layer.

Fuel tank and method for producing the same

A hollow molded article including a polyolefin resin-based layer (A), a modified polyolefin resin-based layer (B) and a fluororesin-based layer (C), wherein the fluororesin-based layer (C) constitutes at least one of the innermost and outermost layers of the hollow molded article.

Blow molded body

The present invention is to provide a method of producing multilayer laminates comprising a polyamide and a fluorine-containing ethylenic polymer laminated together and being excellent in interlayer adhesion strength by multilayer coextrusion in an easy and simple manner without need of any additional step or without being limited to some or other particular adhesive material. The present invention is a production method of a multilayer laminate which comprises laminating at least a polyamide (A) and a fluorine-containing ethylenic polymer (B) by simultaneous multilayer coextrusion using a coextrusion apparatus to obtain the laminate comprising said polyamide (A) and said fluorine-containing ethylenic polymer (B), said coextrusion apparatus comprising a die and a plurality of extruders for feeding resins to said die, and the temperature of said die being set within the range exceeding 260&#xb0; C. but not higher than 310&#xb0; C.

Process for producing multilayered product

The present invention is to provide a laminated resin molding comprising a polyamide-based resin composition as an outer layer and being excellent in interlayer adhesion strength, in particular a laminated resin molding comprising a fluorine-containing resin as an inner layer. The present invention is a laminated resin molding which comprises a layer (A) comprising a polyamide-based resin composition and a layer (B) laminated to said layer (A), said layer (B) comprising a fluorine-containing ethylenic polymer having a carbonyl group, and said polyamide-based resin composition having a functional group, in addition to an amide group, selected from the group consisting of hydroxyl group, carboxyl group, ester group and sulfonamide group in a total amount of 0.05 to 80 equivalent percent relative to the amide group.

Growing community of inventors

Settsu, Japan

Takeshi Inaba