Hitachi Chemical Company, Ltd.

Hitachi, Ltd.

Asahi Denka Kogyo K.k.

Fuji Fiber Glass Co., Ltd.

Atsushi Fujioka

Yasuo Miyadera

Tomio Fukuda

Akihiro Kobayashi

Kiyotaka Mashita

Fumiaki Kanega

Tetsuo Kumazawa

Takayuki Saitoh

Takayuki Saito

Tohru Haruna

Takashi Takeuchi

Masami Arai

Hiroaki Doi

Ikuo Hoshi

Yuji Kobayashi

Tadashi Nagai

Kiyoshi Yokochi

Takehisa Nakagawa

Doi Hiroaki

A macromolecular material composition which comprises a macromolecular material and a modifier which comprises a polyvinyl cyclohexane compound having hydroindane structure. The modifier improves melt flow characteristics, flexibility at a low temperature, and mechanical characteristics, such as bending modulus and bending strength, of the material, and do not bleed or give bad smell.

Macromolecular material composition and a modifier for macromolecular

A method for preparing a trimer of .alpha.-methyl styrene or derivatives thereof, wherein .alpha.-methyl styrene or derivatives thereof is added to an organic solvent comprising Lewis acid is provided. According to the method, the trimer of .alpha.-methyl styrene or derivatives thereof can be obtained in high yield.

Method for preparing trimer of .alpha.-methyl styrene or derivatives

A brominated 1,3-dimethyl-3-phenyl-1-(2-methyl-2-phenylpropyl) indane herein disclosed is represented by the following general formula (I): ##STR1## (wherein x and z each independently represents an integer ranging from 0 to 5, y represents an integer ranging from 0 to 4, provided that x+y+z&gt;1). The compound can be prepared by a method which comprises the step of reacting 1,3-dimethyl-3-phenyl-1-(2-methyl-2-phenylpropyl) indane with a bromination agent. The brominated indane is excellent in flame-resistance, has a high thermal decomposition temperature and never generates brominated dioxine and/or brominated dibenzofuran when burning at a specific temperature. Therefore, the compound is suitably used for imparting flame-resistance to a variety of thermoplastic and thermosetting resins.

Brominated 1,3-dimethyl-3-phenyl-1-(2-methyl-2-phenylpropyl)-indane and

A polyamino-bis-maleimide prepolymer solution obtained by the reaction of 1 mol of N,N'-4,4'-diphenyl methane-bis-maleimide with 0.25 to 0.4 mol of 4,4'-diaminodiphenyl methane in an alkyleneglycol monoalkyl ether as a solvent at elevated temperatures. This solution can be impregnated with a substrate to form a prepreg. The prepreg can be laminated to form heat resistant laminate.

Polyamino-bis-maleimide prepolymer, method for manufacture thereof, and

A polyamino-bis-maleimide prepolymer solution obtained by the reaction of 1 mole of N,N'-4,4'-diphenyl methane-bis-maleimide with 0.25 to 0.4 mol of 4,4'-diaminodiphenyl methane in an alkyleneglycol monoalkyl ether as a solvent at elevated temperatures. This solution can be impregnated with a substrate to form a prepreg. The prepreg can be laminated to form heat resistant laminate.

Composite fibrous products such as composite cloth, composite strings, composite knitted goods, etc., produced by using combination yarns obtained by twisting one or more aromatic polyamide continuous filament yarns and one or more continuous glass yarns have high rigidity and excellent reinforcing effects.

Composite fibrous product

A curable polyamino-bis-imide resin, obtained by the thermal reaction of:

Polyamino-bis-imide resin

Copper-clad laminates for printed wiring boards with almost no warpage can be produced continuously without using a solvent by continuously running a continuous, fibrous substrate, supplying partially and intermittently a solventless thermosetting resin mixture to the running substrate, laminating a copper foil at least one surface of the running substrate, pressure molding with heating the copper foil laminated substrate in a mold comprising a pair of flat plates at least one of which has projecting portions tapered to the center of the flat plate at the periphery thereof, taking off and cutting the molded laminate.

Continuous production of copper-clad laminate

A laminate produced by molding under heat and pressure a plurality of prepregs obtained by impregnating a resin into a composite fabric, either woven or nonwoven, comprising aromatic polyamide fibers and glass fibers has a low linear expansion coefficient and excellent interlaminar strength.

Growing community of inventors

Shimodate, Japan

Atsushi Fujioka