Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Patent
1992-03-30
1993-11-16
Bleutge, John C.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
524386, 524391, 524379, 524383, 524609, 524606, 525420, 525537, 525540, C08K 554
Patent
active
052624617
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to an improved polyarylene sulfide resin composition and a method of preparing the same.
More particularly, the present invention relates to a polyarylene sulfide resin composition having excellent impact resistance and heat resistance and which is produced by blending specific amounts of alkoxysilane compound, water and the like to a resin component comprising a polyarylene sulfide resin and a polyamide resin, and heat melting and kneading the resultant blend, and to the method of preparing same.
BACKGROUND OF THE INVENTION
Recently, a thermoplastic resin having high heat and chemical resistance and excellent flame retardance has been demanded as the material of construction for the components of electrical or electronic appliances, automobile devices or chemical instruments.
Polyarylene sulfide resin, represented by polyphenylene sulfide, is one of the resins satisfying this demand and is inexpensive relative to the excellent properties thereof, such that the demand for polyarylene sulfide resin has increased. However, polyarylene sulfide resin has critical disadvantages in that it is inferior to other engineering plastics such as nylon, polycarbonate, polyacetal, polybutylene terephthalate, and the like, because polyarylene sulfide resin has poor ductility and is therefore brittle.
As a means for overcoming these problems, it is known that blending a fibrous reinforcement material such as glass fiber or carbon fiber and other fillers improves the properties of polyarylene sulfide resin such as strength, rigidity, toughness, heat resistance and the like. However, even by blending such reinforcement materials with polyarylene sulfide resin, the resin still has poor toughness compared with the engineering plastics described above, and the application polyarylene sulfide resin for a great number of uses may be limited in some cases, even though the resin has excellent chemical resistance, heat resistance and nonflammability.
The present inventors have made thorough investigations of polyarylene sulfide resin compositions having high toughness and impact resistance and the method for preparing the same, and examined a reactive substance capable of reacting with both polyarylene sulfide resin and polyamide resin. Consequently, it has been found that a silane compound having a alkoxysilane group within the molecule thereof provides an improvement in impact strength of the blend. The inventors have applied for patents as Japanese Patent Laid-open Nos. 320140/1989, 44140/1990 and 110839/1990 on such composition and the method for preparing same. The improved blend realizes good toughness and impact strength, but the physical properties thereof may vary occasionally. Accordingly improvement has been desired.
SUMMARY OF THE INVENTION
The present inventors have found that to stably produce a polyarylene sulfide resin composition with still more improved toughness and impact strength, the presence of water and the like is influential. Accordingly blending an alkoxysilane compound and a specific amount of water or alcohols with a boiling point of 100.degree. C. or more, with a blend of polyarylene sulfide resin and polyamide resin, and processing and kneading the resultant blend at a specific temperature for a specific period of time, a molding material with remarkably high toughness and utility can be produced in a stable fashion. The present invention therefore relates to a method of preparing a polyarylene sulfide resin composition, comprising mixing (C) 0.01 to 5 parts by weight of at least one silane compound selected from the group consisting of vinylalkoxysilane, epoxyalkoxysilane, aminoalkoxysilane, mercaptoalkoxysilane and allylalkoxysilane, and (D) 0.03 to 5 moles per mole of the component (C) of water, or at least one alcohol selected from alcohols with a boiling point of 100.degree. C. or more, or a mixture thereof, with 100 parts by weight of a resin component comprising (A) 97 to 20 parts by weight of a polyarylene sulfide resin and (B) 3 to 80
REFERENCES:
patent: 5070127 (1991-12-01), Auerbach
patent: 5070151 (1991-12-01), Mizuno et al.
patent: 5149731 (1992-09-01), Uota et al.
Kubota Masaru
Sano Hiroyuki
Serizawa Hajime
Uoda Katsumi
Bleutge John C.
Polyplastics Co. Ltd.
Sweet Mark
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