CYCLISATION PROCESS OF FORMING A MULTIPLE RING COMPOUND
申请人:Loh Teck Peng
公开号:US20100228058A1
公开(公告)日:2010-09-09
The present invention relates to a cyclisation process of forming a multiple ring compound from an isoprenoid compound. The cyclisation process involves reacting the isoprenoid compound with an acetal initiator under conditions sufficient to form the multiple ring compound. The isoprenoid compound is contacted with an initiator an optionally with a catalyst. Cyclisation occurs by reaction of the initiator with the isoprenoid compound. Cyclic acetal compounds wherein the acetal forms part of 6-membered unsaturated ring are also defined.
Olefin polymerization catalyst and process for preparing polyolefin
申请人:SHOWA DENKO KABUSHIKI KAISHA
公开号:EP0644206A1
公开(公告)日:1995-03-22
An olefin polymerization catalyst and a process for preparing a polyolefin using the catalyst. The catalyst comprises: (a) an addition product of an organoaluminum oxy-compound with an organic polar compound having at least one atom selected from the group consisting of a phosphorus atom, a nitrogen atom, a sulfur atom, and an oxygen atom per molecule and free of active hydrogen; and (b) a metallocene.
Polycarbonate resin composition stabilized against radiation
申请人:MITSUBISHI ENGINEERING-PLASTICS CORPORATION
公开号:EP0794218A2
公开(公告)日:1997-09-10
The present invention relates to a polycarbonate resin composition comprising 100 parts by weight of a polycarbonate resin; 0.01 to 5 parts by weight of a compound containing oxymethylene unit, a compound containing oxymethylene unit having substituent or a cyclic ether compound having substituent.
A thermoplastic resin composition comprising:
a transparent aromatic thermoplastic resin (a) and
a copolyester resin (b) comprising at least two kinds of dicarboxylic acid moieties and one kind of diol moiety, 1 to 50 mol % of the dicarboxylic acid moieties being a naphthalenedicarboxylic acid moiety,
the ratio of (a) to the combined amount of (a) and (b) being 55 to 99.99% by weight, and the ratio of (b) being 0.01 to 45% by weight.