An organic EL element, wherein a leak prevention layer having a resistance increased according to the rise of temperature is installed in an organic EL layer held between an anode and a cathode and emitting light, whereby the anode and cathode can be prevented from being short-circuited due to dielectric breakdown.

Organic el element

An inorganic coating film having improved water repellency is provided. The improved surface is provided by treating an inorganic coating film with a material that is reached or adsorbed on the surface of the inorganic coat to increase water repellency. The inorganic coating to be treated may be a silicon dioxide film. The materials used to treat the film include: (1) halogenated silane compounds; (2) silane compounds having a structure including at least one bond selected from Si--H, Si--OH, Si--OR, Si--SH and Si--SR, wherein R is an organic group; (3) silane compounds having a structure including at least one of ##STR1## wherein R1, R2 and R3 are hydrogen or an organic group and (4) reactive organic compounds having a fluorine substituting group, hydrogen fluoride or a metal fluoride.

Synthetic resin ophthalmic lens having an inorganic coating

The present invention relates to a preparation method of a super absorbent polymer. In the preparation method of the super absorbent polymer according to the present invention, (meth)acrylated polyalkylene glycol is used, thereby preparing a super absorbent polymer having more improved absorbency, water holding capacity and absorbency under pressure while improving dispersibility of a monomer composition containing acrylic acid-based monomers.

Preparation method of super absorbent polymer

A method for the production of a particulate hydrated gel polymer, which comprises heating a hydrated gel polymer possessed of a cross-linked structure to a temperature in the range of from 45° to 90°C and extruding the resultant hot hydrated gel polymer through a perforated plate containing holes of a diameter in the range of from 6.5 to 18 mm and an absorbent resin which comprises drying the resultant particulate hydrated gel polymer.

Method for production of particulate hydrated gel polymer and absorbent resin

The present invention is a method for the production of a water absorbent resin, which comprises preparing a monomer component having an ability to form a cross-linked structure, having an acid group-­containing monomer content of at least 50 mol%, and having 10 to 50mol% of the acid group-containing monomer neutralised. This is subjected to aqueous solution polymerisation to form a hydrated gel polymer within a reaction vessel having a plurality of rotary shafts each fitted with stirring blades.

Method for production of water absorbent resin

PURPOSE: After the reverse-phase suspension polymerization of unsaturated carboxylic acid, water is removed from the resultant polymer slurry by azeotripic distillation with an organic solvent to produce granular hydrogel of a specific water content scarcely showing tackiness. CONSTITUTION: The water-in-oil type reverse-phase polymerization of (A) an α,β- unsaturated carboxylic acid/or its alkali metal salt, preferably acrylic acid is carried out in the presence of (B) a dispersing agent and a crosslinking agent such as ethylene glycol, then water is removed from the polymer slurry by azeotropic distillation with (C) an organic solvent, preferably hexane until the water content comes down to 10W43wt%. Further, the remaining water is removed by drying to give the objective hydrogel. EFFECT: The stages of the production process are reduced to increase its productivity and permit the economical production of the hydrogel. COPYRIGHT: (C)1982,JPO&Japio

Production of hydrogel

PURPOSE: To produce the titled polymeric material having a small particle diameter and a high water absorption rate, by subjecting an α,β-unsaturated carboxylic acid monomer (metal salt) to a water-in-oil reversed phase suspension polymerization in the presence of a specified dispersant. CONSTITUTION: A highly water-absorbing polymeric material, average particle diameter 1W40μ, is prepared by adding an organic solvent (e.g., n-hexane) to an aqueous solution, concentration 5W40wt%, containing an α,β-unsaturated carboxylic acid monomer[e.g., (meth)acrylic acid) and/or its metal salt so that the ratio of solvent to aqueous monomer solution is 1:1W4, adding further, to the resulting solution, 0.1W20wt%, based on organic solvent, nonionic surfactant, HLB6W9, (e.g., sorbitan monolaurate) as a dispersant and 0W10wt%, based on monomer, crosslinking agent (e.g., diallyl phthalate) and subjecting the final solution to a water-in-oil reversed phase suspension polymerization at 200°C in the presence of a radical polymerization initiator. COPYRIGHT: (C)1982,JPO&Japio

Production of highly water-absorbing polymeric material having improved water-absorption rate

PURPOSE: To produce a heat-treated polyimide having high electrical conductivity, and capable of being graphitized easily while keeping its shape, by heat-treating an aromatic polyimide in an inert atmosphere at a specific temperature. CONSTITUTION: Preferably a film or fiber of an aromatic polyimide [preferably poly-N,N'-(p,p'-hydroxydiphenylene)pyromellitic imide] is heat-treated in an inert atmosphere at 2,000W3,500°C to obtain the objective heat-treated product. A composition having further improved electrical conductivity can be produced by doping the heat-treated product with an electron acceptor or an electron donor. COPYRIGHT: (C)1985,JPO&Japio

Production of heat-treated polyimide having high electrical conductivity, and its composition

Sheet for cultivating plant

PURPOSE: To increase the thixotropy of soil, to reduce the frictional force of pressure, and to lessen the frictional force between the soil and a device, by adding a high water-absorbing high polymer which becomes a spherical elastic material after water absorption to dug soil and blending them with stirring. CONSTITUTION: A highly water-absorbing high polymer having absorbed liquid is injected to the inside of the partition wall 2 of the shielding digging machine 1 equipped with the soil discharging device 4, the high polymer is blended with dug earth and soil with stirring, the frictional resistance in a cutter is reduced, the dug soil is received once by a hopper in a pit while stopping the supply of pressurized water in the cutter and the soil discharging device 4, and it is sent by pressure to the hopper or dump truck 10 on the ground by the pressure pump 5. A saponified copolymer obtained by subjecting (A) ethylene, (B) a vinyl ester, and (C) an ethylenic unsaturated carboxylic acid (derivative) as main components in a molar ratio of A:(B+C)=(0:100)W(15:85) and a molar ratio B:C of (20:80)W (80:20) to suspension polymerization, etc. may be cited as the preferable example of the high water-absorbing high polymer. COPYRIGHT: (C)1983,JPO&Japio

Murase Kazumoto

Papers

Production of hydrogel

Production of highly water-absorbing polymeric material having improved water-absorption rate

Production of heat-treated polyimide having high electrical conductivity, and its composition

Sheet for cultivating plant

Transportation of soil