Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1991-12-26
1994-03-15
Schofer, Joseph L.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
C08F26900
Patent
active
052946738
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a modified polyolefin type polymer, its manufacturing method and a resin composition containing it. More particularly, it relates to a modified polyolefin type polymer improved in mechanical properties, heat resistance, dyeability, paintability et cetera, its manufacturing method and resin composition containing it.
In the present invention, the word "polyolefin" is used to include not only polyolefins in a narrow sense but also to include polydienes in a broad sense.
BACKGROUND OF THE INVENTION
A method of copolymerizing unsaturated carboxylic acid anhydride is known for improvement of the mechanical properties, heat resistance, dyeability and paintability of a polyolefin type resin, in a narrow sense, such as polyethylene, polypropylene et cetera. As the unsaturated carboxylic acid, anhydrous maleic acid and analogous ones are used generally and the intended polyolefin type polymers are obtained through copolymerization with olefin type monomers or graft polymerization with polyolefin type polymers. The modified polyolefin type polymers manufactured by such a method are not necessarily improved sufficiently and further improvement is required upon commercialization.
Meanwhile, polydienes such as polybutadiene and polychloroprene are being widely used as rubber materials excellent in mechanical properties, heat resistance and oil resistance. These polydienes, however, are generally high in hydrophobic property and problematic about dyeability, paintability, adhesiveness, antistatic property et cetera. In order to break the conventional notion that rubber is bound to be black, needed is an improvement of its dyeability. But so far, no enough improvement of these properties could be achieved and further improvement of these properties have been sought.
A primary object of the present invention is to provide a new modifying agent to thereby modify the aforementioned polyolefin type polymers or polydiene type polymers for improvement of these polymers in mechanical properties, heat resistance, dyeability, paintability, adhesiveness, antistatic property et cetera.
DISCLOSURE OF THE INVENTION
The present invention, in the first aspect, is aimed at providing a modified polyolefin type polymer having one structural unit of glycidyl group represented by the following general formula (I) per 2-1,000 repeating units of olefin: ##STR2## (In the formula, Ar represents an aromatic hydrocarbon group 6-23 in carbon number having at least one glycidyloxy group, and R represents hydrogen atom or methyl group.)
The present invention is, in the second aspect, to provide a method for manufacturing the aforementioned modified polyolefin type polymer comprising a step of subjecting two components, namely a polyolefin (A) and a modifying agent (B) having glycidyl group represented by the following general formula (III): ##STR3## [In the formula, Ar and R are the same as in the general formula (I)], to radical addition by the use of a radical polymerization initiator (C) in the presence or absence of a solvent or a dispersant.
The present invention is, in the third aspect, to provide another method for manufacturing the aforementioned modified polyolefin type polymer comprising a step of copolymerizing an olefin monomer and the modifying agent having glycidyl group represented by the following general formula (III): ##STR4## [In the formula, Ar and R are the same as in the general formula (I)].
The present invention is, in the fourth aspect, to provide a resin composition including the aforementioned modified polyolefin type polymers.
BEST MODE FOR PRACTICING THE INVENTION
An important constituent element of the present invention is a structural unit having a glycidyl group represented by the following general formula (I): ##STR5## [In the formula, Ar represents an aromatic hydrocarbon group 6-23 in carbon number having at least one glycidyloxy group and R represents hydrogen atom or methyl group] and it derives from a modifying agent having at least one
REFERENCES:
patent: 5166273 (1992-11-01), Kobayashi et al.
Deguchi Yoshikuni
Yonezawa Kazuya
Cheng Wu C.
Kanegafuchi Kagaku Kogyo & Kabushiki Kaisha
Schofer Joseph L.
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