Modified polyphenylene ether, process for preparing the same and

Details Modified polyphenylene ether, process for preparing the same and Modified polyphenylene ether, process for preparing the same and

1994-04-29

1996-03-12

Seidleck, James J.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528 86, 528210, 528212, 525397, C08G 6538

Patent

active

054986893

DESCRIPTION:

BRIEF SUMMARY
This application is a continuation of PCT/JP93/01050 filed Dec. 7, 1994.


FIELD OF THE INVENTION

The present invention relates to a novel modified polyphenylene ether comprising repeating units in which a methyl group at 2- and/or 6-position of a phenylene group in the polyphenylene ether is substituted with an aminomethyl group, and a process for preparing the same.
The present invention also relates to a novel thermo-plastic resin composition which can be used, for example, in the production of a molded article by injection molding or extrusion molding.


PRIOR ART

In general, a polyphenylene ether is a resin having various good properties such as heat resistance, hot water resistance, dimensional stability and mechanical and electrical properties. On the other hand, has some drawbacks such as its molding property is not good because of its high melt viscosity, its chemical resistance is not good and its impact resistance is low. To improve such drawbacks of the polyphenylene ether, it has been alloyed with another resin or modified.
For example, Japanese Patent KOKAI Publication No. 897/1977 discloses a process for modifying a polyphenylene ether using an aliphatic secondary amine as one component of a polymerization catalyst. Japanese Patent KOKAI Publication No. 68024/1992 discloses a process for preparing a polyphenylene ether having a terminal secondary amino group comprising reacting a polyfunctional isocyanate with the polyphenylene ether, and Japanese Patent KOKAI Publication No. 313523/1989 discloses a process for preparing a polyphenylene ether having a terminal functional group containing a secondary or tertiary amino group. Japanese Patent KOKAI Publication No. 297428/1989 discloses a polyphenylene ether copolymer having an alkyl-substituted tertiary amine on a methylene group at the 2-position. Japanese Patent KOKAI Publication No. 234421/1989 relates to a polyphenylene ether copolymer having a partly aryl-substituted tertiary amine on a side methylene group at the 2-position.
Japanese Patent KOKAI Publication No. 503464/1988 relates to a polyphenylene ether having a polyalkylene dicarboxylate. Japanese Patent KOKAI Publication No. 37365/1990 discloses a polyphenylene ether having a primary amino group on a propylene group in a side chain.
Different from a crystalline polymer such as polyethylene terephthalate or polybutylene terephthalate, a liquid crystalline polyester does not suffer from tangling of molecules in a molten state since the molecules are stiff, forms a polydomain having a crystal state, and molecular chains are highly orientated in a flow direction at a low shear. Then, the liquid crystalline polyester is generally called a thermotropic liquid crystal polymer. Because of such specific behaviors, its melt flowability is excellent and it can easily provide a thin-wall molded article having a thickness of about 0.2 to 0.5 mm, and the molded article advantageously has a high strength and high stiffness, while the drawbacks are that its anisotropy is large and its weld strength is very low.
In addition, the liquid crystalline polyester is expensive, which is another problem. In the market, it is highly desired to provide a liquid crystalline polyester resin composition which maintains good heat resistance and mechanical properties of the liquid crystalline polyester, has improved weld strength and is cheap.
To improve the molding processability and strength of the liquid crystalline polyester by the addition of an amorphous polymer to the liquid crystalline polyester, Japanese Patent KOKAI Publication No. 115357/1981 describes the improvement of melt processability of the liquid crystalline polyester by the addition of a polymer such as a polyphenylene ether to the liquid crystalline polyester.
Further, Japanese Patent KOKAI Publication No. 97555/1990 describes the blending of various polyallylene oxides in the liquid crystalline polyester to improve the soldering heat resistance.
However, some of the modified polyphenylene ethers prepared by the above described processes are

REFERENCES:
patent: 4054553 (1977-10-01), Olander
patent: 4098846 (1978-07-01), Olander
patent: 4647297 (1987-03-01), Zampini
Database WPI, Derwent Publications Ltd., London, GB; AN 93-224360(28) & JP A-5 148 357, 15 Jun. 1993 (Abstract).

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