[EN] METHOD OF PURIFYING DIANHYDRIDES, THE DIANHYDRIDES FORMED THEREBY, AND POLYETHERIMIDES FORMED THEREFROM<br/>[FR] PROCÉDÉ DE PURIFICATION DES DIANHYDRIDES, DIANHYDRIDES AINSI OBTENUS, ET POLYÉTHERIMIDES FORMÉS À PARTIR DE CEUX-CI
申请人:SABIC INNOVATIVE PLASTICS IP
公开号:WO2009120212A1
公开(公告)日:2009-10-01
A method for purifying an oxydiphthalic anhydride comprises diluting a first mixture comprising an oxydiphthalic anhydride, a solvent, a catalyst, and an inorganic salt with a solvent, to provide a second mixture having a solids content of 10 to 30 percent based on total weight of the second mixture; filtering and washing the solids of the second mixture at a temperature below the crystallization point temperature of the oxydiphthalic anhydride to provide a third mixture; hydrolyzing the third mixture by adding water and a water-soluble acid to form a fourth mixture; heating the fourth mixture; then cooling to provide a solid-liquid mixture, optionally decanting a portion of the liquid, re diluting the remaining solid-liquid mixture, then filtering to provide a solid component; washing the solid component with water to provide a fifth mixture of oxydiphthalic tetra acid and water; ring closing the oxydiphthalic tetra acid to provide oxydiphthalic anhydride, and filtering the oxydiphthalic anhydride.
A composition containing a novel vinyl-group-containing compound. This composition contains a vinyl-group-containing compound represented by general formula (1). In the formula: W
1
and W
2
represent a group represented by general formula (2) (where a ring (Z) is an aromatic hydrocarbon ring, X is a single bond or —S—, R
1
is a single bond or a C1-4 alkylene group, R
2
is a specific substituent group such as a monovalent hydrocarbon, and m is an integer equal to 0 or higher), a group represented by general formula (4) (where the ring (Z), X, R
1
, R
2
, and m are as previously stated), a hydroxyl group, or a (meth)acryloyloxy group; rings (Y
1
, Y
2
) are aromatic hydrocarbon rings; R represents a single bond or a specific divalent group; R
3a
and R
3b
represent a cyano group, a halogen atom, or a monovalent hydrocarbon group; and n1 and n2 are integers of 0-4.
NOVEL TETRACARBOXYLIC DIANHYDRIDE, POLYIMIDE RESIN AND METHOD FOR PRODUCING THE SAME, PHOTOSENSITIVE RESIN COMPOSITIONS, PATTERNING PROCESS, METHOD FOR FORMING CURED FILM, INTERLAYER INSULATING FILM, SURFACE PROTECTIVE FILM, AND ELECTRONIC PARTS
申请人:SHIN-ETSU CHEMICAL CO., LTD.
公开号:US20190169211A1
公开(公告)日:2019-06-06
The present invention has been made in view of the circumstances herein. An object of the present invention is to provide: a tetracarboxylic dianhydride which can lead to a polyimide usable as a base resin of a photosensitive resin composition capable of forming a fine pattern and obtaining high resolution without impairing excellent characteristics such as mechanical strength and adhesiveness; a polyimide resin obtained by using the tetracarboxylic dianhydride; and a method for producing the polyimide resin. The tetracarboxylic dianhydride is shown by the following general formula (1).
Amidate compound, catalyst for polyurethane production, and method for producing polyurethane resin
申请人:KOEI CHEMICAL COMPANY, LIMITED
公开号:US10689478B2
公开(公告)日:2020-06-23
Provided is an amidate compound represented by the formula (1):
wherein A is a substituted or unsubstituted hydrocarbon group, n is an integer of 1 or more, and D is a nitrogen-containing organic group represented by the formula (2):
wherein R1, R2, and R3 are the same or different, and are each a hydrocarbon group that may contain a heteroatom; some or all of R1, R2, and R3 may be bonded together to form a ring structure; X is a nitrogen atom, an oxygen atom, or a sulfur atom; and a is 0 or 1, wherein a is 1 when X is a nitrogen atom, and a is 0 when X is an oxygen atom or a sulfur atom.
[EN] PHOTOALIGNING MATERIALS<br/>[FR] MATÉRIAUX DE PHOTOALIGNEMENT
申请人:ROLIC AG
公开号:WO2013050121A1
公开(公告)日:2013-04-11
The present invention relates to polymer, homo- or copolymer or oligomer for the photoalignment of liquid crystals, especially for the planar orientation of liquid crystals, comprising a main chain and a side chain, wherein the side chain and/or main chain comprises a polar group, compositions thereof, and its use for optical and electro optical devices, especially liquid crystal devices (LCDs).