Disclosed is a non-thermofusible phenol resin powder having an average particle diameter of not more than 20 μm and a single particle ratio of not less than 0.7. This non-thermofusible phenol resin powder preferably has a chlorine content of not more than 500 ppm. This non-thermofusible phenol resin powder is useful as an organic filler for sealing materials for semiconductors and adhesives for semiconductors. The non-thermofusible phenol resin powder is also useful as a precursor of functional carbon materials such as a molecular sieve carbon and a carbon electrode material.

Non-thermofusible phenol resin powder, method for producing the same, thermosetting resin composition, sealing material for semiconductor, and adhesive for semiconductor

A phenolic resin composition for fiber-reinforced composite material, comprising at least the following constituent A and thermoplastic resin B. A : phenolic resin, and B : at least one thermoplastic resin selected from among polyvinyl formal, polyvinyl acetal, polyvinyl butyral, polyvinylpyrrolidone, polyvinyl acetate, polyvinyl alcohol, polyethylene glycol, copolymer nylon, and dimer acid polyamide. A prepreg for fiber-reinforced composite material is produced by coating a film with the resin composition and impregnating the film with reinforcing fibers under heat and pressure.

Phenolic resin composition for fiber-reinforced composite material, prepreg for fiber-reinforced composite material, and process for producing prepreg for fiber-reinforced composite material

Extending sections are positioned along X and Y directions by engagement sections, and positioned along Y direction of a vehicle by positioning sections using mounts of a rear bumper. This makes it possible to accurately indicate a forming position of a vehicular-part mounting hole, which is needed to mount a rear under spoiler, with respect to the rear bumper based on a scribed mark if the extending sections are positioned by using the engagement sections and the positioning sections. Therefore, a worker can form a vehicular-part mounting hole in an appropriate position by merely making a hole in the position of the scribed mark, without requiring a work of removing the rear bumper.

Positioning jig for vehicular-part mounting hole

A superabsorbent polymer which has excellent initial absorbency and keeps water from flowing out under pressure even after the passage of a long period of time, in which the superabsorbent polymer keeps water from flowing out under pressure even after the passage of a long period of time to exhibit excellent absorbency, and also has an anti-caking property under conditions of high temperature and high humidity to improve storage stability, is provided The superabsorbent polymer composition of the present invention may be used to improve physical properties of a variety of diapers, potty training pants, incontinence pads, etc, thereby being applied to production of personal absorbent hygiene products having high absorbency and excellent storage stability under conditions of high temperature and high humidity

Superabsorbent polymer composition

The purpose of the present invention is to provide: a dispersant having the excellent property of dispersing nanocarbon materials, in particular, CNTs and the like; and a dispersion composition. This dispersant is characterized by comprising a polyalkylene oxide having a structural unit of the chemical formula (1). In formula (1), L1 and L2 each represent an optionally substituted, linear alkylene group, Z is a linking group with which L1 and Ar are bonded, or Z may be absent so that L1 and Ar have been directly bonded, and Ar is represented by the chemical formula (1a), (1b), or (1c).

Dispersant, dispersion composition, and fibrous sheet

PURPOSE: To obtain the subject web having small spring back force, capable of carrying out low pressure molding, not generating void in carbonization and suitable for production of a carbon fiber-reinforced carbon composite material. CONSTITUTION: This web contains (A) a carbon fiber (having preferably 5-70mm fiber length), (B) pulp and (C) a powdery thermosetting phenolic resin (preferably having high residual carbon ratio) and aggregate of the component C is enclosed with the component B. The web is obtained by retaining a dispersion obtained by dispersing the components B and C into a liquid containing a surfactant (preferably polyethylene glycol/polypropylene glycol copolymer) for certain time, aggregating the component C in a form enclosed with the component B, dispersing the component A into a liquid, mixing an aggregate dispersion of the resultant components B/C with a dispersion of the component A and eliminating the liquid of the mixed dispersion by a web-making method.

Composite web composed of carbon fiber and phenolic resin and its production

PURPOSE:To obtain paper of inorganic fibers excellent in formation through easily, rapidly and homogeneously dispersing inorganic fibers, by disintegrating such inorganic fibers neutrally in water incorporated with a specific dispersant followed by adding a polyacrylamide-based dispersant in the system to accomplish the dispersion of the fibers followed by conducting papermaking operation. CONSTITUTION:Inorganic fibers pref. 5-20mum in single fiber diameter and <=100mum in single fiber length (e.g. glass fibers, carbon fibers) are neutrally disaggregated in water incorporated with a polyethylene oxide-based dispersant (pref. 3000000-5000000 in molecular weight and 100-5000cps in 1% aqueous solution viscosity) followed by adding a polyacrylamide-based dispersant (pref. an anionic modification 100-300cps in 0.1% aqueous solution viscosity) to the system at pref. 2-25wt.% based on the fibers and at pref. 1-100ppm based on the water to be used for fiber dispersion to conduct the dispersion followed by performing papermaking operation, thus obtaining the objective paper.

Production of paper of inorganic fiber

PURPOSE: To produce a polylactate by polymerizing a polymerizing raw material composed of an L-lactide, etc., in the presence of a tin compound under specific conditions, having a high molecular weight, a small amount of remaining lactide, useful for clothing, a medical treatment material, etc. CONSTITUTION: This polylactate is obtained by subjecting a polymerizing raw material composed of an L-lactide or a D-lactide having >=97% optical purity to ring opening polymerization in the presence of a tin compound such as tin 2-ethyl hexanoate at 120-200 deg.C and successively keeping the reaction mixture at 110-140 deg.C. The polymerizing raw material is preferably mixed with one or more compounds selected from the group consisting of a polyalkylene glycol, a polyhydric alcohol, a hydroxycarboxylic acid, a lactone, a lactam and a cyclic carbonate.

Production of polylactate

PURPOSE:To obtain a glass fiber-reinforced phenol resin molding material comprising glass fibers opened without being cut uniformly blended with a phenol resin by combining a rotor having low peripheral speed with one having high peripheral speed and blending a phenol resin of a specific shape with glass fibers in the presence of water and grinding. CONSTITUTION:(A) Powdery or granular phenol resin is combined with (B) glass fibers and (C) 0.5-1.5 pt.wt. water based on 1 pt.wt. total amounts of the components A and B by combining of a rotor 2 having low peripheral speed of 2-8m/second with a rotor 3 having high peripheral speed of >=30m/second and ground to give the objective material. The rotor 2 having low peripheral speed is preferably equipped with large blades 4 of a blade face having a given angle in the revolution direction and small auxiliary blades 5 on the same shaft of the blades 4. The rotor 3 having high peripheral speed is preferably provided with plural blades 6 in a multiple stage on one revolving shaft wherein the blades 6 have no angle in the revolution direction and are lamellar. Both the rotors are installed in one blender to carry out blending and grinding at the same time.

Production of molding material of glass fiber-reinforced pheonol resin

PURPOSE:To produce the title resin solution which is excellent in storage stability, workability and thermosetting properties, and suitable as molding material and laminating material and gives a molded product and the like excellent in heat resistance, flame retardance, mechanical strength and electric properties, by dissolving a thermosetting phenolic resin having specific properties in an organic solvent. CONSTITUTION:Phenol and/or a phenol derivative such as m-cresol is added to a hydrochloric acid/HCHO bath having a hydrochloric acid concentration of 5-28wt.%, and an HCHO concentration of 8-25wt.% with the total concentration of the hydrochloric acid and the HCHO being 15-40wt.% so that the bath ratio of the weight of the bath to that to phenols may be 8 or more and they are brought into contact with each other at 45 deg.C or below to produce a thermosetting phenolic resin having a weight-average molecular weight of 1,000 or more (measured bY G.P.C.) in terms of PS, a free phenol content of 500ppm or below and containing as main linkage units trifunctional residues of methylene, methylol and phenols. The obtained resin is dissolved in a polar organic solvent such as alcohols, esters, ketons or amides so that the concentration may be 5-80wt.%.

Kubota Yoshiaki

Papers

Composite web composed of carbon fiber and phenolic resin and its production

Production of paper of inorganic fiber

Production of polylactate

Production of molding material of glass fiber-reinforced pheonol resin

Thermosetting phenolic resin solution and manufacture thereof