Conveniently implantable sustained release drug compositions
申请人:Wong G. Vernon
公开号:US20060073182A1
公开(公告)日:2006-04-06
This invention provides for biocompatible and biodegradable syringeable liquid, implantable solid, and injectable gel pharmaceutical formulations useful for the treatment of systemic and local disease states.
Catalyst composition and process for polymerizing olefins
申请人:MITSUI PETROCHEMICAL INDUSTRIES, LTD.
公开号:EP0086645A2
公开(公告)日:1983-08-24
A process for producing an olefin polymer or copolymer which comprises polymerizing or copolymerizing olefins or copolymerizing an olefin with up to 5 mole% of a diolefin in the presence of a catalyst comprising a titanium catalyst component containing magnesium, titanium, halogen and an electron donor, an organoaluminum catalyst component and a third catalyst component, characterized in that said catalyst is composed of
(A) a titanium catalyst component containing magnesium, titanium, halogen and an electron donor as essential ingredients, said electron donor being selected from the group consisting of
(a) esters of polyfunctional compounds selected from polycarboxylic acids having 5 to 36 carbon atoms, polyhydroxy compounds having 6 to 28 carbon atoms and hydroxy-substituted carboxylic acids having 10 to 28 carbon atoms,
(b) monocarboxylic acid esters of the formula RCOOR' in which each of R and R' represents a hydrocarbyl group having 1 to 20 carbon atoms, and at least one of them represents a branched-chain group, an alicyclic group, or an aryl ring-containing linear group, and
(c) carbonic acid esters having 6 to 18 carbon atoms,
(B) an organoaluminum compound, and
(C) a substituted methylenediamine compound as a third component;
and a catalyst composition used therefor.
Process for polymerizing olefins and catalyst for polymerizing olefins
申请人:MITSUI PETROCHEMICAL INDUSTRIES, LTD.
公开号:EP0385765A2
公开(公告)日:1990-09-05
A catalyst for polymerization of an olefin, said catalyst being formed from
[A] a solid titanium catalyst component comprising magnesium, titanium, halogen and an electron donor as essential ingredients,
[B] an organoaluminum compound catalyst component, and
[C] an electron donor catalyst component comprising at least two electron donors including an electron donor (1) and an electron donor (2), the MFR (a) of homopolypropylene obtained by using the electron donor (1) together with the solid titanium catalyst component [A] and the organoaluminum compound catalyst component [B] has the following relation to the MFR (b) of homopolypropylene obtained by using the electron donor (2) under the same polymerization conditions as in the case of using the electron donor (1)
log [MFR (b)/MFR (a)]≧1.5.
This catalyst can give an olefin polymer having a broad molecular weight. Also provided is a process for polymerizing or copolymerizing an olefin in the presence of the above catalyst.