Mitsubishi Gas Chemical Company, Inc.

Shuta Kihara

Jitsuo Oishi

Takaaki Kutsuna

Ko Kedo

Tsuyoshi Bito

Takashi Makinoshima

Shinichi Yonehama

Hiroki Oguro

Kiichiro Seki

Takashi Kashiba

Masahiro Harada

Takakiyo Mine

Kazumi Tanaka

Sotaro Hiramatsu

Toshiaki Nishimura

Wataru Ueno

Masahito Ohkido

Kichiro Seki

The present invention provides a metal-clad white laminate including: a white resin layer which is composed of a resin composition obtained by mixing a polyimide having a repeating unit as represented by a particular chemical structural formula with a white pigment; and at least one metal layer, the white resin layer being an adhesive layer for the metal layer. The metal-clad white laminate of the present invention uses a white resin composition which has high reflectance and whiteness and excellent light resistance, and is easy to be reduced in thickness and weight.

Metal-clad white laminate

A polyimide resin which is satisfactory in solvent solubility and heat resistance, has a low coefficient of water absorption and is excellent in adhesive properties and a method for manufacturing the same, a film containing the subject polyimide resin and a metal-clad laminate including an adhesive layer composed of the subject polyimide resin are provided. The polyimide resin is a polyimide resin containing a molecule having a repeating unit represented by a structure of any one of the following formulae (1) to (3) in a specified proportion, whose molecular end is capped by an end-capping agent. 

Polyimide resin

A method for producing a colorless transparent resin film by a solution flow casting method containing: flow-casting an organic solvent solution of a polyamic acid or a polyimide on a support; and drying, the method containing at least the following step (1), step (2) and step (3) in this order, and an apparatus therefor:

Process and apparatus for production of colorless transparent resin film

A polyimide resin composed of a repeating unit represented by the following formula (1): or composed of the repeating unit represented by the formula (1) and at least one repeating unit represented by the following formula (2): wherein X is the same as defined in the specification, exhibits a good thermoplastic property, a high solubility in solvents and a good heat resistance as well as a low water absorption and an excellent adhesion property. The polyimide resin is useful as the material for the adhesive layer of a metal-clad laminate which is composed of an insulating substrate, a metal layer and an adhesive layer disposed between the insulating substrate and the metal layer.

Polyimide resin, polyimide film, and polyimide laminate

It relates to a highly heat resistant thermosetting polyimide resin composition that is cured at a temperature of 150&#xb0; C. or less, and provides a cured product that generates a less amount of decomposed gas even under heating to 250&#xb0; C., and has flexibility and adhesiveness. A two-component thermosetting polyimide resin composition containing a liquid A containing a polyimide (a) having a main chain constituted by a repeating unit having a polyoxyalkylenediamine structure with amino groups on both ends thereof, and a liquid B containing a bismaleimide compound, and a cured product of a thermosetting polyimide resin composition obtained by mixing these two liquids and curing the mixture under heating.

Two-part thermocurable polyimide resin composition and cured product thereof

A polyimide resin which is soluble in an organic solvent and which has a low coefficient of water absorption, thermosetting properties, high heat resistance and excellent adhesive properties, a method for manufacturing the same, an adhesive and a film each containing the subject polyimide resin and a metal-clad laminate including an adhesive layer composed of the subject polyimide resin are provided. The polyimide resin is a polyimide resin containing a repeating unit represented by the following formula (1) and a repeating unit represented by the following formula (2), with a proportion of a group presented by the following formula (3) being 50% by mole or more of the whole of X. 

The invention is directed to a process for producing polyimide film, including stretching, at 150&#xb0; C. to 380&#xb0; C. and a stretch ratio of 1.2 to 4.0, an unstretched polyimide film which is formed from a polyimide having a repeating unit represented by formula (1): (wherein R represents a tetravalent group derived from cyclohexane; and &#x3a6; represents a divalent aliphatic, alicyclic, or aromatic group, or a combination thereof that has a total number of carbon atoms of 2 to 39 and may have at least one connecting group selected from the group consisting of &#x2014;O&#x2014;, &#x2014;SO&#x2014;, &#x2014;CO&#x2014;, &#x2014;CH&#x2014;, &#x2014;C(CH)&#x2014;, &#x2014;OSi(CH)&#x2014;, &#x2014;CHO&#x2014;, and &#x2014;S&#x2014;) and which has an organic solvent content of 0.5 wt. % or more and less than 30 wt. %. The produced polyimide film exhibits transparency, excellent heat resistance, and reduced dimensional changes.

Process for producing polyimide film

The flexible metal-clad laminate of the present invention comprises at least one polyimide layer made of a polyimide having repeating units represented by the following formula I: wherein R and &#x3a6; are as defined in the specification, and at least one metal layer. The polyimide is soluble in solvents and excellent in heat resistance and adhesion property, and shows a low dielectric constant even in a high frequency range.

Metal-clad laminate

A polyimide resin is produced by the reaction of a compound selected from 1,2,4,5-cyclohexanetetracarboxylic acid, dianhydride thereof and reactive derivatives thereof and a compound selected from diamines and diisocyanates each containing at least one phenylene group and at least one isopropylidene group. The polyimide resin is colorless and exhibits a high heat resistance, a high transparency and a low water absorption.

Low water-absorptive polyimide resin and method for producing same

The present invention provides an adhesive for laminates containing, as a main component, an epoxy resin composition comprising an epoxy resin and an epoxy resin-curing agent, the epoxy resin composition being formed into an epoxy resin cured product containing a skeleton structure represented by the formula (1): in an amount of at least 40% by weight. Since the adhesive of the present invention reveals not only a suitable adhesion to various film materials but also a high gas-barrier property, only a single layer formed therefrom can realize both an excellent gas-barrier property and an excellent adhesion property in combination, so that it is possible to produce a high gas-barrier laminated film for a packaging material without forming a separate gas-barrier layer therein.

Adhesive of epoxy resin and curing agent with xylylene diamine structure

A composition for coating having a gas barrier property comprising coating-forming components of an epoxy resin and an amine curing agent, wherein said amine curing agent is a reaction product of (A) methaxylylenediamine or paraxylylenediamineand (B) polyfunctional compound having at least one acyl group which is capable of forming amide group moiety by reaction with a polyamine to form an oligomeror or (A), (B) and (C)monocarboxylic acid having 1 to 8 carbon atoms and/or derivative thereof and a coating and a coated film a gas barrier property the same.

Composition for coating having a gas barrier property, coating and coated film having a gas barrier property used the same

A composition for coating having a gas barrier property comprising coating-forming components of an epoxy resin and an amine curing agent, wherein said amine curing agent is a reaction product of (A) methaxylylenediamine or paraxylylenediamineand (B) polyfunctional compound having at least one acyl group which is capable of forming amide group moiety by reaction with a polyamine to form an oligomeror or (A), (B) and (C) monocarboxylic acid having 1 to 8 carbon atoms and/or derivative thereof and a coating and a coated film a gas barrier property the same.

The metal foil-clad laminate of the present invention comprises at least one polyimide layer made of a polyimide having repeating units represented by the following formula I: wherein R and &#x3a6; are as defined in the specification, at least one insulating substrate, and at least one metal foil layer. The polyimide is excellent in thermopress-bonding property, solubility in solvents and heat resistance, and exhibits a low dielectric constant. The metal foil-clad laminate having the polyimide layer is suitably applicable to high-frequency printed wiring boards, etc.

Metal foil-clad laminate

In the process of the present invention, a solvent-soluble polyimide is produced by polycondensing at least one tetracarboxylic acid component with at least one diamine component in a solvent in the presence of a tertiary amine. The tetracarboxylic acid component is selected from the group consisting of tetracarboxylic dianhydrides represented by the following formula 1: wherein R is as defined in the specification, and tetracarboxylic acids and their derivatives represented by the following formula 2: wherein R and Yto Yare as defined in the specification. Unlike the conventional techniques using an excessively large amount of a chemical imidation agent such as acetic anhydride and a chemical imidation catalyst such as triethylamine, in the process of the present invention, the solvent-soluble polyimide having a high polymerization degree is easily produced in a solvent with good productivity by using only a catalytic amount of the tertiary amine.

Process for producing solvent-soluble polyimide

Provided are an organic coated steel having an epoxy resin layer coated on the surface of the steel product, which is formed by curing an epoxy resin composition comprising an epoxy resin and an epoxy resin curing agent as principal components and which has an oxygen permeability coefficient of 2 ml-mm/m&#xb7;day&#xb7;MPa or less at a temperature of 23&#xb0; C. and a relative humidity of 60% RH, an organic coated steel having the above epoxy resin layer and a polymer resin layer laminated in order on the surface of a steel product and a rust preventing method for metal in which a coating layer of the above epoxy resin layer is formed on the surface of metal. The above epoxy resin layer has a high gas barrier property and a good adhesive property even under wide temperature and humidity environment, and therefore the organic coated steel and the rust preventing method for metal according to the present invention make it possible to provide a steel product having a high rust preventive and corrosion preventive effect even under severe environment and extend the life of the steel product.

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Kanagawa, Japan

Shuta Kihara