Solvent-containing coating material and the use thereof
申请人:——
公开号:US20040019142A1
公开(公告)日:2004-01-29
Method for making a solvent-containing coating material comprising 5 to 70% by weight of at least one mixture of substances (A). The mixture of substances is obtained by copolymerizing in at least one hydroxy-group containing reactive diluent a mixture (A1) of olefinically unsaturated monomers that contain a1) 1 to 90% by weight, based on mixture (A1), of at least one cycloaliphatic monomer and a2) 0 to 90% by weight, based on mixture (A1), of at least one hydroxy-group containing monomer. The coating material further contains 5 to 70% by weight of at least one hydroxy-group containing polyaddition resin (polyadduct) (B) with a M
n
of 800 to 3,500 and 5 to 70% by weight of at least one cross-linking agent (C) for thermally cross-linking the material. The weight of A, B, and C are based on the solid content of the coating material.
Verfahren zur Herstellung monomerer aromatischer Hydroxyurethane
申请人:BAYER AG
公开号:EP0153642A2
公开(公告)日:1985-09-04
Monomere aromatische Hydroxyurethane werden hergestellt, indem man eine aromatische Verbindung, die pro Molekül mindestens eine direkt an einen aromatischen Kern gebundene Hydroxylgruppe und mindestens eine Nitro-, Nitroso-, Azo- oder Azoxygruppe enthält mit einer organischen Hydroxyverbindung und Kohlenmonoxid in Gegenwart spezieller Katalysatoren umsetzt.
A plastic optical fiber comprising a core and a cladding, wherein the core is made a polymer comprising units of methyl methacrylate and of a methacrylate ester the ester moiety of which has an alicyclic hydrocarbon of 8 to 20 carbon atoms, and the cladding is made of a fluorine-containing polymer comprising units of the formula:
wherein
R1 and R2 are each hydrogen or C, -C3 alkyl, R11 is fluorine or trifluoromethyl, and R12 is C2 - C11 fluoroalkyl, which units (I) are derived from fluoroalkyl a-fluoroacrylate or trifluoromethacrylate, which has short- and long-time heat and humidity resistance as well as low attenuation of light transmission.
Method for producing plastic optical fiber with heat resistance
申请人:SUMITOMO CHEMICAL COMPANY, LIMITED
公开号:EP0190656A2
公开(公告)日:1986-08-13
A plastic optical fiber with excellent heat resistance comprising a core made of a polymer comprising units of methyl methacrylate and a cladding made of a polymer containing at least 20% by weight of fluorine is produced by washing the core polymer with an organic solvent in which the core polymer is substantially insoluble, forming the core from the washed core polymer and forming the cladding around the core.
Methacrylate esters of alcohols having an ether linkage and/or an alicyclic ring can be obtained with no trouble of coloration or polymer formation during the production and for the product. An alcohol having an ether linkage and/or an alicyclic ring is treated with an alkaline substance, and the treated alcohol is caused to react with methyl methacrylate for a transesterification reaction in the presence of an alkaline substance.