[EN] HYDROGENATION OF BENZENE POLYCARBOXYLIC ACIDS OR DERIVATIVES THEREOF<br/>[FR] HYDROGENATION D'ACIDES POLYCARBOXYLIQUES DE BENZENE OU DE LEURS DERIVES
申请人:EXXONMOBIL CHEM PATENTS INC
公开号:WO2004046078A1
公开(公告)日:2004-06-03
A process for hydrogenating benzenepolycarboxylic acids or derivatives thereof, such as esters and/or anhydrides, by bringing one or more benzenepolycarboxylic acids or one or more derivatives thereof into contact with a hydrogen-containing gas in the presence of one or more catalytically active metal, such as platinum, palladium, ruthenium or mixtures thereof, deposited on a catalyst support comprising one or more ordered mesoporous materials.
Modified copolyesters and optical films including modified copolyesters
申请人:Hebrink J. Timothy
公开号:US20060084780A1
公开(公告)日:2006-04-20
Modified copolyesters having relatively low refractive indices and relatively high glass transition temperatures are disclosed. These modified copolyesters can be used in forming one or more layers in an optical film, such as a multilayer polymer film.
MODIFIED COPOLYESTERS AND OPTICAL FILMS INCLUDING MODIFIED COPOLYESTERS
申请人:Hebrink Timothy J.
公开号:US20080145666A1
公开(公告)日:2008-06-19
Modified copolyesters having relatively low refractive indices and relatively high glass transition temperatures are disclosed. These modified copolyesters can be used in forming one or more layers in an optical film, such as a multilayer polymer film.
An optical film comprising at least one compound represented by formula (1) is disclosed. In the formula, Y
11
, Y
12
and Y
13
each independently represent methine or a nitrogen atom; R
11
, R
12
and R
13
each independently represent formula (A), (B) or (C) or a hydrogen atom, provided that at least two of R
11
, R
12
and R
13
each independently represent formula (A), (B) or (C). In three formulae, L
12
, L
22
and L
32
each represent a
5
-membered heterocyclic group.
Thermoplastic wholly aromatic copolyimide ester and process for producing the same
申请人:IDEMITSU PETROCHEMICAL CO. LTD.
公开号:EP0342652A2
公开(公告)日:1989-11-23
A thermoplastic wholly aromatic copolyimide ester consisting essentially of the recurring unit (I) represented by the following formula:
the recurring unit (II) represented by the following general formula:
wherein
n is an integer of 0 or 1;
the recurring unit (III) represented by the following formula:
wherein the two carbonyl groups are present at para position or meta position of the benzene nucleus to each other;
and the recurring units (IV 1) or (IV 2) represented respectively by the following formulas:
wherein
-Q- is -0- or -CO-
and each Q is present at para position or meta position of the benzene nucleus respectively to the imide group,
or
with the proviso that the recurring units (I), (II), (III), and (IV) are bonded to form ester bonds,
and wherein the thermoplastic wholly aromatic copolyimide ester has a melt viscosity of from 1.0 to 1.0 x 105 Pa•s as measured at a shear stress of 0.025 Mpa and at a temperature of from 300 to 400° C