Catalysis and regioselectivity in the Michael addition of azoles. Kinetic vs. thermodynamic control
作者:András Horváth
DOI:10.1016/0040-4039(96)00845-3
日期:1996.6
bases, TBD and MTBD were found to be highly efficient catalysts in the Michael addition of azoles with α,β-unsaturated nitriles and esters. The factors influencing regioselectivity have been elucidated, and some new azole-Michael adducts were synthesized. These were shown to be useful starting compounds for the regioselective N-alkylation of the corresponding azoles.
[EN] HIGH HEAT MONOMERS AND METHODS OF USE THEREOF<br/>[FR] MONOMÈRES À CHALEUR ÉLEVÉE ET LEURS PROCÉDÉS D'UTILISATION
申请人:SABIC GLOBAL TECHNOLOGIES BV
公开号:WO2016014536A1
公开(公告)日:2016-01-28
High purity epoxide compounds, methods for preparing the high purity epoxide compounds, and compositions derived from the epoxide compounds are provided. Also provided are materials and articles derived from the epoxide compounds.
Epoxy resin composition for printed circuit board and printed circuit board using the same
申请人:Hitachi Chemical Company, Ltd.
公开号:EP0947532A1
公开(公告)日:1999-10-06
An epoxy resin composition and a printed circuit board using the same are provided, which features a low water absorption property, excellent heat endurance and a good adhesion with a copper foil. The same is comprised of: (a) an epoxy resin; (b) a multi-functional phenol group; (c) a hardening accelerator; and (d) a compound which has a triazine or isocyanurate ring, or a compound which contains nitrogen less than 60 weight % but does not contain any urea derivative. A varnish of the epoxy resin composition is impregnated into a base material, dried to obtain a prepreg. At least one or more sheets of the prepregs are laminated, and then a metal foil is deposited on one or both surfaces thereof, which is heated under pressure to provide for a printed circuit board.
Removable Water-Dispersible Acrylic Pressure-Sensitive Adhesive Composition and Pressure-Sensitive Adhesive Sheet
申请人:Nitto Denko Corporation
公开号:EP2492330A2
公开(公告)日:2012-08-29
A removable water-dispersible acrylic pressure-sensitive adhesive composition according to the present invention includes an acrylic emulsion polymer (A), a water-insoluble crosslinking agent (B), and a carboxylic-acid-containing acrylic polymer (C). The polymer (A) includes a (meth)acrylic alkyl ester and a carboxyl-containing unsaturated monomer as essential constitutive monomers and has a content of the (meth)acrylic alkyl ester of 70 to 99.5 percent by weight and a content of the carboxyl-containing unsaturated monomer of 0.5 to 10 percent by weight, each based on the total amount of constitutive monomers. The polymer (C) includes (meth)acrylic acid as an essential constitutive monomer and has a total content of acrylic acid and methacrylic acid of 11 percent by weight or more based on the total amount of constitutive monomers.
Removable water-dispersible acrylic pressure-sensitive adhesive composition and pressure-sensitive adhesive sheet
申请人:Nitto Denko Corporation
公开号:EP2511357A1
公开(公告)日:2012-10-17
A removable water-dispersible acrylic pressure-sensitive adhesive composition according to the present invention includes an acrylic emulsion polymer (A) including, as essential constitutive monomers, a (meth)acrylic alkyl ester in a content of 70 to 99.5 percent by weight, and a carboxyl-containing unsaturated monomer in a content of 0.5 to 10 percent by weight, each based on the total amount of constitutive monomers; a waterw-insoluble crosslinking agent (B); an acetylenic diol compound (C); and a compound (D) represented by chemical formula CRaO-(PO)l-(EO)m-(PO)n-Rb]. The acetylenic diol compound (C) has a HLB value of less than 13.