[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).
Bis(azobenzene) diamines and photomechanical polymers made therefrom
申请人:The United States of America, as represented by the Secretary of the Air Force
公开号:US09644071B1
公开(公告)日:2017-05-09
Bis(azo-benzene) diamine monomers and a method of synthesizing the monomers are provided. The bis(azo-benzene) diamine monomers, in combination with amine reactive monomers, form polymers, such as polyimides and copolyimides, having photomechanical and thermomechanical properties.
Aromatic polyamides and polyesters containing ortho-ether groups
申请人:University of Liverpool
公开号:US05834620A1
公开(公告)日:1998-11-10
Described herein are polyesters and polyamides which contain repeat units derived from novel dicarboxylic acids comprising arylene groups having ortho ethers substituted thereon. Also disclosed are novel compounds from which these polymers can be made. The polymers are especially useful for molding resins and coatings.
Multifunctional crosslinking agent, crosslinked polymer, and method of making same
申请人:The United States of America, as represented by the Secretary of the Air Force
公开号:US10294255B1
公开(公告)日:2019-05-21
A multifunctional crosslinking agent, a crosslinked polymer, and a method of making the same are disclosed. The multifunctional crosslinking agent, which may be used to crosslink amine-terminated polyamides, polyimides, or poly(amide-imide)s, includes three or four anhydride functional groups. The multifunctional crosslinking agent may be defined by a general chemical formula (I): (Z—Ar—)n—W, wherein W represents an anhydride functional group that is directly or indirectly bonded to Ar; Ar represents an aryl group that is directly bonded to W; and n is equal to 3 when W is P═O or N, or n is equal to 4 when W is Si or a carbon moiety.
BLOCK COPOLYMERIZED POLYIMIDE INK COMPOSITION FOR PRINTING
申请人:Win Maw Soe
公开号:US20090229870A1
公开(公告)日:2009-09-17
The object is to provide a polyimide ink composition having good printing properties and good continuous printing properties, which composition can be dried at a low temperature of not higher than 220° C., and which composition gives a coating film, after being dried, having excellent dimensional stability, heat resistance, low modulus of elasticity, flexibility, resistance to warping, chemical resistance, adhesiveness with substrates, and plating resistance. This object is accomplished by a polyimide ink composition for printing, comprising a mixed solvent containing an benzoic acid ester solvent and a glyme solvent, and a polyimide soluble in the mixed solvent; wherein the polyimide is obtained by polycondensing a polyimide oligomer with a tetracarboxylic dianhydride component(s) and/or a diamine component(s) having no siloxane bond in molecular skeleton thereof, the polyimide oligomer being prepared by polycondensing a tetracarboxylic dianhydride component(s) and a diamine component(s) having siloxane bonds in molecular skeleton thereof in the presence of a base catalyst(s), or a mixed catalyst including a lactone(s) and/or an acidic compound(s) and a base(s); the content of the diamine component(s) having siloxane bonds based on the total diamine components being 15 to 85% by weight.