摘要:
Disclosed herein is a method for preparing a polycondensation resin. The method includes preparing a low degree condensate; and solid phase polymerizing the low degree condensate, wherein a granular molded article is introduced into the solid phase polymerization. The method enables efficient manufacture of high quality resins without problems such as agglomeration or scaling of a low degree condensate in pipes.
摘要:
The method for manufacturing electrically conductive macromolecules of the present invention is provided by reacting at least a monomer and an oxidizing agent to obtain electrically conductive macromolecules by a chemical polymerization method, the method including reacting the monomer and the oxidizing agent at least in a polymerizing vessel that contains a steam atmosphere. With this method, it is possible to obtain flat, electrically conductive macromolecules (10). Thus, it is possible to provide a method and an apparatus for manufacturing electrically conductive macromolecules in which it is possible to combine both low ESR and high capacity in a solid state electrolytic capacitor, realize low losses, and have low current leakage.
摘要:
A free radical polymerization process for the preparation of a thermoplastic resin includes heating a mixture comprised of a free radical initiator, a stable free radical agent, and ethylene at a temperature of from about 40.degree. C. to about 500.degree. C. and at a pressure of from about 500 to about 5,000 bar to form a thermoplastic resin. The thermoplastic resin has a molecular weight distribution of from about 1.0 to about 2.0.
摘要:
The reaction of less than the stoichiometric amount of a methoxymethyl aminotriazine with a linear, hydroxyl-terminated polyester in a mixture of the two wherein the polyester to triazine ratio is from about 97:3 to about 70:30 by weight affords a storage stable coating powder which forms an attractive, pin hole-free film when fused on a substrate at thicknesses of from about 3.9 to about 6.8 mils.
摘要:
Insoluble polymer powders which are only slightly swellable are prepared by polymerization of N-vinylpyrrolidone or a mixture of (a) an N-vinylcarboxamide, acrylamide, methacrylamide, acrylic acid, methacrylic acid, acrylates, methacrylates and/or a vinyl ester and (b) from 0.1 to 10% by weight, based on the total amount of monomers, of, as a crosslinking agent, a compound possessing two or more ethylenically unsaturated double bonds, in a powder bed in the presence of a heat-transfer medium and in the absence of oxygen and polymerization initiators, at from 90.degree. to 220.degree. C., the powder state being maintained, the reaction mass being circulated and the heat-transfer medium evaporated from the polymerization zone.The resulting polymers are used as adsorbents, as formulation assistants for crop protection agents or as ion exchangers.
摘要:
A high solids, organic solvent based, sprayable coating composition which is capable of acid catalyzed crosslinking is composed of an active hydrogen-containing resin, a curing agent present externally and/or internally as a part of the active hydrogen-containing resin, and a catalytic amount of a non-ionic, saturated or unsaturated organic polycyclic ester of a sulfonic acid.