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
1989-02-28
1990-11-13
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...
524425, 524431, 524443, 524445, 524449, 524451, 524454, 524508, 525109, 525133, 525148, 525176, C08L 6900, C08L 6703, C08L 6702
Patent
active
049702564
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
This invention relates to a resin composition having excellent impact properties.
TECHNICAL BACKGROUND
It is known that a composition comprising 1 to 99% by weight of a polyarylene ester and 99 to 1% by weight of a polycarbonate or polyalkylene terephthalate is an excellent composition having both impact resistance and heat distortion resistance and excellent processability, barrier properties, chemical resistance and heat resistance [cf. Japanese Patent Second Publication (Kokoku) No. 27061/1975, Japanese Patent First Publication (Kokai) Nos. 54159/1973 and 34342/1975].
Although the composition shows excellent impact properties under certain conditions, it still has very low impact resistance under other conditions. That is, when a shaped article prepared from the composition has a large radius of notched part, it shows very high impact strength, but when the shaped article has a small radius of notched part, it shows very low impact strength.
Thus, it has been desired to obtain an improved resin composition which has improved impact properties with less dependency on the radius of notched part and can show excellent impact properties even in articles having a small radius of notched part.
DESCRIPTION OF THE INVENTION
Under the above circumstances, the present inventors have intensively studied and have found that by incorporating an ethylene copolymer consisting of ethylene, an .alpha.,.beta.-unsaturated carboxylic acid alkyl ester and maleic anhydride into a composition comprising a polyarylene ester and a polycarbonate or a polyalkylene terephthalate, there can be obtained an improved resin composition having excellent impact properties while maintaining the original excellent impact properties of the composition comprising a polyarylene ester and a polycarbonate or a polyalkylene terephthalate.
That is, an object of the present invention is to provide a composition having improved impact properties with less dependency on the radius of notched part without deteriorating the excellent properties such as heat distortion resistance of the composition comprising an polyarylene ester and a polycarbonate or a polyalkylene terephthalate.
The composition of this invention comprises
(A) 60 to 99% by weight of a composition comprising 1 to 99% by weight of a polyarylene ester and 99 to 1% by weight of a polycarbonate or a polyalkylene terephthalate, and
(B) 40 to 1% by weight of an ethylene copolymer consisting of 50 to 90% by weight of ethylene, 5 to 49% by weight of an .alpha.,.beta.-unsaturated carboxylic acid alkyl ester and 0.5 to 10% by weight of maleic anhydride.
The polyarylene ester used in this invention includes polyesters produced from a diphenol or a derivative thereof and an aromatic dicarboxylic acid or a derivative thereof.
The diphenols are specifically compounds of the formula: ##STR1## wherein Ar is an aromatic nucleus such as a phenylene nucleus, a biphenylene nucleus, or a napthylene nucleus,
R is a hydrogen atom, an alkyl group (C.sub.1 -C.sub.4 alkyl group, e.g. methyl or ethyl, etc.), a halogenated C.sub.1 -C.sub.4 alkyl group, an aryl group (e.g. phenyl, naphthyl), a halogenated aryl group, an aralkyl group (e.g. benzyl, phenylethyl), a halogenated aralkyl group, a C.sub.1 -C.sub.4 alkylsubstituted aryl group, a halogenated C.sub.1 -C.sub.4 alkylsubstituted aryl group, an alicyclic group, or a halogenated alicyclic,
X is a C.sub.1 -C.sub.4 alkylene or C.sub.1 -C.sub.4 alkylidene group (e.g. methylene, ethylene, propylene, ethylidene, propylidene, isopropylidene, etc.); or two or more C.sub.1 -C.sub.4 alkylene or C.sub.1 -C.sub.4 alkylidene groups which are mutually bound via an aromatic group, a tertiary amino group i.e. [--N(alkyl)--], an ether group (i.e. --O--), a carbonyl group (i.e. --CO--), or a sulfur-containing group such as sulfide (--S--), sulfoxide (--SO--) or sulfonyl (--SO.sub.2 --); or X may be a divalent alicyclic group, or a sulfur-containing group such as sulfide, sulfoxide or sulfonyl, an ether group, a carbonyl group, or a tertiary amino group,
REFERENCES:
patent: 4324869 (1982-04-01), Robeson
Asai Kuniaki
Inoue Masakazu
Suzuki Yasuro
Bleutge John C.
Buttner David
Sumitomo Chemical Company Limited
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