Production process for hydroxyalkyl (meth) acrylate
申请人:Nippon Shokubai Co., Ltd.
公开号:US20040030180A1
公开(公告)日:2004-02-12
There is disclosed a novel production process for a hydroxyalkyl (meth)acrylate in which: the diffusion of harmful substances due to disposal of catalysts can be reduced; and also the amount of the catalyst as used can be greatly saved in the entire production process. This production process comprises the step of carrying out a reaction between (meth)acrylic acid and an alkylene oxide in the presence of a catalyst in order to produce the hydroxyalkyl (meth)acrylate; with the production process being characterized by further comprising the step of recovering the catalyst as has been used for the reaction.
Modified polyamides, polyamide compositions, and method for making same
申请人:——
公开号:US20040030057A1
公开(公告)日:2004-02-12
The invention concerns modified polyamides, and more particularly polyamides comprising units of the type obtained by reacting a diacid on a diamine, modified by a multifunctional compound. Finished articles formed from said polyamides or from compositions based on said polyamides exhibit excellent mechanical properties, as well as a very good surface appearance. The inventive modified polyamide is obtained by mixing in melted state polyamides of different types, in the presence of a multifunctional compound.
Stretched film structure of the poly-1,3-phenylene terephthalate type
申请人:MITSUI PETROCHEMICAL INDUSTRIES, LTD.
公开号:EP0052927A2
公开(公告)日:1982-06-02
A monoaxially or biaxially stretched film structure, or a heat-set structure thereof, of an unstretched film of an aromatic polyester having an intrinsic viscosity, determined in p-chlorophenol at 50°C, of 0.4 to 2.0 and composed of [A] polybasic carboxylic acid component units consisting of terephthalic acid units (a1) and units (a2) of a polybasic carboxylic acid otherthan terephthalic acid, the proportion of the units (a2) being up to 25 mole% based on the units (a,) and units (a2) combined, and [B] polyol component units consisting of resorcinol units (b1) and units (b2) of a polyol other than resorcinol, the proportion of the units (b2) being up to 25 mole% based on the units (b1) and (b2) combined.
The use of thermoplastic polyester resin composition for UV-screening
申请人:MITSUBISHI KASEI CORPORATION
公开号:EP0263705A2
公开(公告)日:1988-04-13
A thermoplastic polyester resin composition for use in forming containers, films, sheets, comprises a thermoplastic polyester resin and an amount effective in ultraviolet screening of at least one of naphthalenetetracarboxylic acids, acid anhydrides thereof, imides thereof and esters thereof.
Method of manufacturing alkali metal salt of 2,3,6,7-naphthalenetetracarboxylic acid
申请人:NKK CORPORATION
公开号:EP0359098A1
公开(公告)日:1990-03-21
A method of manufacturing an alkali metal salt of 2,3,6,7-naphthalenetetracarboxylic acid. Either a sodium salt or a mixture of sodium salt and potassium salt of at least one naphthalenecarboxylic acid selected form the group consisting of naphthoic acids and naphthalenepolycarboxylic acids is heated to an elevated temperature in an inert-gas atmosphere in the presence of a Henkel reaction catalyst and halogenated sodium.