MODIFIER FOR AROMATIC POLYESTER AND AROMATIC POLYESTER RESIN COMPOSITION COMPRISING THE SAME
申请人:TABATA Masayoshi
公开号:US20110224343A1
公开(公告)日:2011-09-15
The present invention provides a modifier for aromatic polyesters which enhances the melt fluidity of aromatic polyesters without a significant decrease in the heat resistance of the aromatic polyesters, and an aromatic polyester resin composition including the modifier for aromatic polyesters. The present invention relates to a modifier for aromatic polyesters comprising polyhydric phenol residues and residues of aromatic polycarboxylic acid, acid halide or acid anhydride thereof, and the modifier comprises a material having a structure composed of a first residue selected from the group consisting of divalent residues represented by Formula (I): —Ar—W
1
x
—Ar— and by Formula (II): —Ar—, the first residues being bonded to two identical or different second residues selected from the group consisting of monovalent residues represented by Formula (III):
and monovalent residues represented by Formula (IV): —O—C(O)—R
7
—.
Low temperature synthesis of condensation polymers
申请人:SHELL INTERNATIONALE RESEARCH
MAATSCHAPPIJ B.V.
公开号:EP0277907A2
公开(公告)日:1988-08-10
Condensation polymers of high molecular weight, such as polyesters, polyureas, and polyamides, are usually prepared at temperatures of 200°C or greater. However, by utilizing the catalyst systems of the present invention, condensation polymers can be synthesized at much lower temperatures. The polycondensation catalyst systems of the present invention are particularly useful for synthesizing aliphatic polyesters, such as polyethylene terephthalate, from dicarboxylic acids and aliphatic glycols. The present invention more specifically discloses a process for the synthesis of an aliphatic polyester comprising polymerizing at least one dicarboxylic acid with at least one aliphatic glycol in the presence of (1) at least one phosphorus containing compound which contains at least one trivalent or pentavalent phosphorus atom which is bonded directly to at least one phenyl group, (2) an acid acceptor, and (3) at least one halogenated organic compound. It is preferred to utilize a polymeric agent having bound acid acceptor groups as the acid acceptor in the process of the present invention.
申请人:SHELL INTERNATIONALE RESEARCH
MAATSCHAPPIJ B.V.
公开号:EP0292629A2
公开(公告)日:1988-11-30
Condensation polymers of high molecular weight, such as polyesters, polyureas, and polyamides, are usually prepared at temperatures of 200°C or greater. However, by utilizing the catalyst system of the present invention condensation polymers can be synthesized at much lower temperatures. These catalyst systems are comprised of (1) a silicon-phosphorus composition which contains at least one divalent oxygen atom which is bonded directly to a tetravalent silicon atom and a trivalent or pentavalent phosphorus atom; and (2) at least one acid acceptor. For example, P(OSiR₃)₃ wherein R can be an aliphatic or aromatic hydrocarbon radical, can be used in conjunction with a basic solvent as a catalyst system. Polymeric agents having pendant diphenylphosphine dichloride groups can also be used in conjunction with an acid acceptor as a catalyst system.
高分子量缩聚聚合物,如聚酯、聚脲和聚酰胺,通常在 200°C 或更高温度下制备。然而,利用本发明的催化剂体系,缩聚聚合物可以在更低的温度下合成。这些催化剂体系由以下部分组成:(1) 硅磷组合物,其中至少含有一个直接与四价硅原子和三价或五价磷原子键合的二价氧原子;(2) 至少一种酸接受体。例如,P(OSiR₃)₃(其中 R 可以是脂肪族或芳香族烃基)可与碱性溶剂一起用作催化剂体系。具有悬垂二苯基二氯化膦基团的聚合物制剂也可与酸接受体一起用作催化剂体系。
AROMATIC POLYESTER
申请人:Muroran Institute of Technology
公开号:EP2479203A1
公开(公告)日:2012-07-25
The present invention provides an aromatic polyester which is substantially free from the occurrence of coloration and retains significantly high transparency even after being thermally processed at high temperature and which has high flowability. The aromatic polyester contains a polyhydric phenol residue and a residue of any one of aromatic polycarboxylic acid, halide thereof, and anhydride thereof, and terminals of the aromatic polyester have a structure represented by the formula -C(O)-R. The aromatic polyester has an end-capping rate of 90% or higher and a weight average molecular weight (Mw) ranging from 3,000 to 1,000,000.
An agent for hair deforming treatment comprising the following components (A), (B) and (C) :
(A) glyoxylic acid, or a hydrate or a salt thereof,
(B) resorcin, and
(C) water,
wherein the molar ratio of the content of the component (B) to the content of the component (A), (B)/(A), is 0.2 or more and 5 or less.