Daikin Industries, Ltd.

Daikin Kogyo Co., Ltd.

Agency of Industrial Science and Technology

Daiken Industries, Ltd.

Diakin Kogyo Co., Ltd.

Sinji Tamaru

Motonobu Kubo

Nobuyuki Tomihashi

Akira Ohmori

Tsuguo Yamaoka

Takahiro Tsunoda

Masayoshi Tatemoto

Masato Kashiwagi

Kanenaga Fujii

Hiroshi Yamashita

Takayuki Deguchi

Toru Komiyama

Junji Hayakawa

Tsuneo Fujii

A diallyl aromatic dicarboxylate derivative of the formula ##STR1## wherein Y is hydrogen atom or perfluoroalkenyl group having 6 to 14 carbon atoms, is a novel compound. The compound (1) is a starting material for a prepolymer containing a repeating unit derived from diallyl aromatic fluorine-containing dicarboxylate and represented by the formula ##STR2## wherein X is perfluoroalkenyl group having 6 to 14 carbon atoms. Further, the present invention provides a curable resin composition which comprises a prepolymer having at least one carbon-carbon double bond in the molecule and diallyl aromatic fluorine-containing dicarboxylate represented by the formula ##STR3##

Aromatic dicarboxylic acid diallyl ester derivatives, prepolymer derived

A diallyl aromatic dicarboxylate derivative of the formula ##STR1## wherein Y is hydrogen atom or perfluoroalkenyl group having 6 to 14 carbon atoms, is a novel compound. The compound (1) is a starting material for a prepolymer containing a repeating unit derived from diallyl aromatic fluorine-containing dicarboxylate and represented by the formula ##STR2## wherein X is prefluoroalkenyl group having 6 to 14 carbon atoms. Further, the present invention provides a curable resin composition which comprises a prepolymer having at least one carbon-carbon double bond in the molecule and diallyl aromatic fluorine-containing dicarboxylate represented by the formula ##STR3##

Aromatic dicarboxylic acid diallyl ester derivative, prepolymer derived

The present invention provides a fluroine-containing novolak resin or its derivative having a repeating unit of the formula ##STR1## wherein R.sup.1 is hydrogen atom, OH or ##STR2## R.sup.2 is hydrogen atom or alkyl group having 1 to 4 carbon atoms, X is fluorine-containing monovalent organic group having 2 to 20 carbon atoms. The present invention also provides a perfluoroalkenyloxphenol or its derivative of the formula ##STR3## wherein R.sup.10 is OH or ##STR4## R.sup.11 is H, OH, alkyl group having 1 to 4 carbon atoms or ##STR5## Y is perfluoroalkenyl group having 6 to 14 carbon atoms.

Fluorine-containing novolak resin and derivative thereof

A tricyclodecane derivative represented by formula (I): ##STR1## wherein R.sup.1 represents a group X.sup.1 O-- or a hydrogen atom;

Tricyclodecane derivative

4,4'-(Perfluoroisopropylidene)dicyclohexanol or its organic acid ester of the formula ##STR1## wherein R' is hydrogen atom or acyl group having 1 to 10 carbon atoms, is useful as a starting material of a curable resin, cross-linking agent or the like.

4,4'-(perfluoroisopropylidene)dicyclohexanol, derivative thereof and

The present invention provides a perfluoroalkenyloxybenzoic acid derivative of the formula ##STR1## wherein X is perfluoroalkenyl group having 6 to 14 carbon atoms, and process for preparing the same. Further, the present invention provides a prepolymer of a perfluoroalkenyloxybenzoic acid derivative comprising a repeating unit of the formula ##STR2## wherein X is same as above, and a repeating unit having one double bond and derived from the cleavage of double bond of a diene compound.

Perfluoroalkenyloxybenzoic acid derivative, process for preparing the

Etchant composition

This invention provides a branch structure for a rod-type optical transmission line having a quartz rod core, characterized in that two quartz rod branch members bent to a substantially L-shaped form and having a circular cross section are combined together with the axes of longitudinal portions of the members in parallel and with the horizontal portions thereof bifurcated, the combined longitudinal portions being ground to a planar surface each at the opposed faces thereof so as to conjointly form a circular cross section in a predetermined cross sectional area ratio, the combined longitudinal portions being adhered together at the ground planar surfaces, conjointly having the same diameter as the quartz rod core and being coaxially connected to the core at a straight portion of the transmission line. The branch structure of the present invention can divide light for transmission into a branch line at a desired ratio with a reduced transmission loss.

Branch structures for rod-type optical transmission lines

An original plate for dry offset printing comprising a substrate suitable for preparation of an offset printing plate and a film formed on the substrate. The film consists essentially of a copolymer formed from at least 40% of a monomer of the formula: ##STR1## wherein n is an integer of 2 to 7 and R is hydrogen or methyl; and at least one other ethylenically unsaturated monomer.

Films of a copolymer of an ester derived from a fluorine-containing

A copolymer comprising (a) units of a fluorine-containing acrylic monomer having a general formula ##STR1## wherein X is F or CF.sub.3, Y is H or CH.sub.3, n is an integer of 2 to 7, and (b) units of an ethylenically unsaturated monomer having a photosensitive group. The copolymer has an excellent photosensitivity and excellent water and oil repellent properties, and is useful for example as a photosensitive material for dry offset printing plate or resist and as a photo-curable, water and oil repelling coating material.

Novel copolymer and photosensitive material containing the same

A fluoroalkyl acrylate copolymer comprising recurring units of the general formula (I): ##STR1## wherein R.sub.1 is hydrogen atom or methyl group, R.sub.2 is a bivalent hydrocarbon group and R.sub.f is a C.sub.2 to C.sub.6 straight or branched perfluoroalkyl group or a C.sub.2 to C.sub.6 straight or branched fluoroalkyl group having hydrogen atoms of not less than one and of not more than half of the number of the carbon atoms, and recurring units of the general formula (II): ##STR2## wherein R.sub.3 is hydrogen atom or methyl group and R.sub.4 is a bivalent hydrocarbon group or a mono-substituted bivalent hydrocarbon group with hydroxyl group or a halogen except fluorine. The copolymer is curable with light and energy rays, and is suitable as a material sensitive thereto for use in resist, dry lithographic printing plate and paint.

Fluoroalkyl acrylate copolymer and composition containing the same

Ion exchanger comprising a water-insoluble copolymer prepared by post-polymerizing at least one fluoroolefin monomer to a perfluorovinylacetic acid-vinylidene fluoride copolymer containing not less than 25% by mole of the perfluorovinylacetic acid unit in an aqueous solution of said copolymer in the presence of an organic or inorganic peroxide. The ion exchanger has excellent heat and chemical resistances and dimensional stability.

Growing community of inventors

Suita, Japan

Sinji Tamaru