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
1986-07-15
1988-07-26
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...
524606, 524609, 525420, 525537, C08L 7700, C08L 8104
Patent
active
047601094
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The subject invention relates to novel resin compositions comprising polytetramethylene adipamide and polyarylene sulfide and being superior in mechanical strength, rigidity, chemical resistance, heat resistance and moldability.
2. Description of Prior Art
The various engineering plastics developed lately have found special applications for manufacturing various kinds of automotive, general machinery, electric and electronic parts based on the optimal use of their specific features. Besides technological progress has been made by combining more than two kinds of polymers so that their respective defects are eliminated thanks to their complementary effects. In many cases, however, no compositions having satisfactory characteristics and practical values are obtainable by combining different kinds of polymers because their defects remain uneliminated frequently.
In the case of the combinations of polyamides and polyphenylene sulfide, (PPS), U.S. Pat. No. 4,292,416 describes the blending of small amounts of PPS as nucleating agent in polyamides, to improve the crystallinity and related properties. Less than 3% by weight of PPS is added and suitable polyamides are polyamides derived from terephthalic acid and branched aliphatic diamines containing ten carbon atoms. In the Japanese Patent Application No. 069255/1978 blends of small amounts of nylon-6 and 6.6 with PPS are described in which the impact resistance of the latter is improved.
However until yet no polyamide-PPS blends with polyamide as main component that show outstanding properties for a wide range of applications have been reported.
One reason for this may be the fact that polyamide such as nylon 6 and 6.6 are insufficiently compatible with PPS and no homogeneous mixtures can be obtained.
The object of the invention is therefore to find a combination of polyamide and polyarylene sulfide that can be blended into homogeneous mixtures, in which the superior physical properties of both the components are preserved.
SUMMARY OF THE INVENTION
It has been found by the inventor that polytetramethylene adipamide (nylon 4.6), of which the chemical structure is closely related to that of nylon 6.6, is surprisingly highly miscible with polyarylene sulfide, and that the blends obtained from this polyamide and PPS show the superior physical properties of both components.
The subject invention presents a polyamide resin composition comprising 95 to 50 percent by weight of a polyamide mainly consisting of tetramethylene adipamide and 50 to 5 percent by weight of polyarylene sulfide.
DETAILED DESCRIPTION OF THE INVENTION
The polyamides according to the subject invention are copolymers and mixtures of polyamides containing polytetramethyleneadipamide and tetramethylene adipamide as main components. In principle there exist no limitations concerning the copolymer and mixture components, so that all known amide-forming compounds can be chosen. Representative among the former are 6-aminocaproic, 11-aminoundecanic, 12-aminododecanic, paraminomethylbenzoic and other amino acids; .epsilon.-caprolactam, .omega.-laurolactam and other lactams; hexamethylenediamine, undecamethylenediamine, dodecamethylenediamine, 2.2.4-/2,2,4-trimethylhexamethylenediamine, 5-methylnonamethylenediamine, methaxylirenediamine, paraxylirerediamine, 1,3- and 1,4-bis(aminomethyl)cyclohexanes, 1-amino-3-aminomethyl-3,5,5,-trimethylcyclohexane, bis(4-aminocyclohexyl)methane, bis(3-methyl-4-aminocyclohexyl)methane, 2,2-bis(4-aminocyclohexyl)propane, bis-(aminopropyl)piperazine, aminoethylpiperazine and other diamines and adipic acids; and adipic, suberic, azelaic, dodecane-2, terephthalic, isophthalic, 2-chlorotere-phthalic, 2-methylterephthlatic, 5-methylisophthalic, 5-sodiumsulfoisophthalic, hexahydroterephthalic, hexahydroisophthalic, diglycolic and other dicarboxylic acids. The latter include the polyamides being composed thereof.
Polyamides containing tetramethylene adipamide as main component, for instance more than 80 mole percent, can
REFERENCES:
patent: 4292416 (1981-09-01), Shue
patent: 4446304 (1984-01-01), Gaymans
patent: 4528335 (1985-07-01), Selby
"Van Th-Nylon Tot Stanyl"--THThema 13--Sep. 1984, p. 10.
Chemical and Engineering News--May 21, 1984, pp. 33-34 (Technology).
Bleutge John C.
Carrillo A.
Stamicarbon B. V.
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