JPH04216860A - Alloyed resin composition - Google Patents

Abstract

PURPOSE:To prepare the title compsn. consisting of a polyphenylene sulfide resin and a polyamide resin and giving an improved weld. CONSTITUTION:100 pts.wt. resin mixture consisting of 5-95wt.% polyphenylene sulfide resin and 95-5wt.% polyamide resin is compounded with 0. 001-10 pts.wt. alkoxylated compd.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an alloyed resin composition of polyphenylene sulfide resin/bolyamide resin, which has improved mechanical properties.

0002

[Prior Art] Polyphenylene sulfide resin is known as a resin with excellent heat resistance, chemical resistance, and flame retardancy, but it has the major drawback of being extremely brittle when used alone. The current situation is that its uses are limited. On the other hand, polyamide resin has excellent properties such as excellent moldability and extremely toughness, so it is used in a wide range of applications, but it has drawbacks such as dimensional changes due to water absorption and a decrease in rigidity. are doing. Therefore, in order to compensate for the above-mentioned drawbacks and obtain an excellent molding material with high practicality, several compositions consisting of polyphenylene sulfide resin and polyamide resin have been proposed (for example, JP-A-53-69255, Japanese Unexamined Patent Publication 1986-15
5462, Japanese Patent Application Laid-open No. 1-174562, etc.)
.

However, in these compositions, the miscibility of polyphenylene sulfide resin and polyamide resin is still insufficient, and the mechanical properties of these compositions have not reached a practically satisfactory level when used as molded products. Ta.

0004

[Problems to be Solved by the Invention] The present invention aims to improve the moldability and toughness of polyphenylene sulfide resin and polyamide resin by blending polyamide resin without losing the excellent properties of polyphenylene sulfide resin. Solved the problem of improving the deterioration in physical properties of weld parts, which is a major problem especially when trying to use it as a molded product, among the significant deterioration in mechanical properties that occurs when resins with completely different properties are blended. It is something to do.

[0005]

[Means for Solving the Problems] As a result of repeated research into alloying polyphenylene sulfide resin and polyamide resin, the present inventor has conducted research in order to obtain a resin composition with excellent mechanical properties, particularly physical properties of weld parts. An alloyed resin composition is prepared by blending 0.001 to 0.001 parts by weight of an alkoxy group-containing compound to 100 parts by weight of a resin mixture consisting of 5 to 95% by weight of polyphenylene sulfide resin and 95 to 5% by weight of polyamide resin. , mechanical properties,
It was discovered that the physical properties of the weld part were particularly excellent, and the present invention was completed.

The polyphenylene sulfide resin used in the present invention has the general formula:

[0007]

[Chemical formula 1]

60 mol% or more of the structural unit represented by
Preferably, it is a polymer containing 80 mol% or more, for example, Japanese Patent Publication No. 44-27671, Japanese Patent Publication No. 45-33
The method disclosed in Japanese Patent Publication No. 68, Japanese Patent Publication No. 52-12240, etc. can be arbitrarily selected for production. Other structural units of the above polymer include, for example

0009
]

[Case 2]

40 m of structural units selected from [0010] etc.
It may be contained in a range of ol% or less, preferably 20 mol% or less. The melt viscosity of the polyphenylene sulfide resin used in the present invention is preferably 100 to 200,
000 poise (measurement temperature 320℃, shear rate 103
/sec), more preferably 200 to 50,000
It's poise.

Polyamide resins used in the present invention include nylon 4, nylon 6, nylon 8, and nylon 9.
, nylon 10, nylon 11, nylon 12, nylon 46, nylon 66, nylon 610, nylon 61
2. Aliphatic polyamide resins such as nylon 636 and nylon 1212, nylon 4T (T: terephthalic acid),
Examples include aromatic polyamide resins such as nylon 4I (I: isophthalic acid), nylon 6T, nylon 6I, nylon 12T, and nylon 12I, and copolymers and blends thereof.

These polyamide resins preferably have a number average molecular weight of 5,000 to 100,000, with a number average molecular weight of 8.0 to 100,000.
00 to 50,000 is more preferable, and 10,00
0 to 30,000 is most preferred. The alkoxy group-containing compound used in the present invention has the general formula (RO
)n -X- (R represents an alkyl group, an aryl group, or a molecular unit derived from these; n represents an integer of 1 to 4; X represents an element selected from silicon, titanium, and aluminum It is a compound that contains a molecular structure consisting of .) in its molecule. Examples of these compounds include vinyltris(β-methoxyethoxy)silane, vinyltriethoxysilane, vinyltrimethoxysilane, γ-methacryloxypropyltrimethoxysilane, and β-(3,4-epoxycyclohexyl)ethyltrimethoxysilane. , γ-glycidoxypropyltrimethoxysilane, γ-glycidoxypropylmethyldiethoxysilane, N-β(aminoethyl)γ-aminopropyltrimethoxysilane, N-β(aminoethyl)γ-aminopropyldimethoxysilane , γ-aminopropyltriethoxysilane, N-phenyl-γ-aminopropyltrimethoxysilane, γ-mercaptopropyltrimethoxysilane, γ-chloropropyltrimethoxysilane, isopropyl tristearoyl titanate, isopropyl tris(dioctylpyrophosphate) titanate ,
Isopropyl tri(N-aminoethyl-aminoethyl)
Titanate, Tetraoctylbis(ditridecylphosphite) titanate, Tetra(2,2-diallyloxymethyl-1-butylbis(ditridecyl)phosphite titanate, Bis(dioctylpyrophosphate)
Oxyacetate titanate, bis(dioctyl pyrophosphate) ethylene titanate, isopropyltrioctanoyl titanate, isopropyl dimethacrylylisostearoyl titanate, isopropyl tridodecylbenzenesulfonyl titanate, isopropyl isostearoyl diacryl titanate, isopropyl tri(
Examples include dioctyl phosphate) titanate, isopropyl tricumylphenyl titanate, tetraisopropyl bis(dioctyl phosphite) titanate, and acetalkoxyaluminum diisopropylate.

These alkoxy group-containing compounds are preferably blended in an amount of 0.001 to 10 parts by weight per 100 parts by weight of a resin mixture consisting of 5 to 95% by weight of polyphenylene sulfide resin and 95 to 5% by weight of polyamide resin. It is particularly preferable to blend 0.01 to 5 parts by weight. If the amount is less than 0.001 parts by weight, no effect will be seen and the weld strength will not improve, and if it is more than 10 parts by weight, undesirable results such as foaming and coloring will occur.

[0014] The composition of the present invention may optionally contain additives that are added to ordinary thermoplastic resins, such as heat stabilizers, light stabilizers, ultraviolet absorbers, lubricants, nucleating agents, antioxidants, dyes,
Pigments, plasticizers, colorants, reinforcing agents such as glass fiber, carbon fiber, rock wool, ceramic fiber, potassium titanate, kaolin, clay, wollastonite, talc, mica, carbon black, montmorillonite,
There is no particular restriction on the addition of ferrite or other thermoplastic resins in an amount of 50 parts by weight or less.

[0015] The preparation of the composition of the present invention can be carried out using Brabender, Brabender,
This can be accomplished by conventionally known techniques such as a kneader, Banbury mixer, and extruder.

[0016]

[Examples] Examples of the present invention are shown below, but the present invention is not limited to the following examples unless it exceeds the gist thereof. The raw materials and test methods used in the present invention are shown below. [1] Raw material ■ PPS; Polyphenylene sulfide resin: Linear type (manufactured by Toray Phillips Petroleum Co., Ltd. M2588
]■ PA; Nylon 66 [Leona 1300 manufactured by Asahi Kasei Industries, Ltd.
S (registered trademark)] ■ CP; γ-Aminopropyltriethoxysilane (A1100, manufactured by Nippon Unicar Co., Ltd.) [2] Test method ■ Tensile test (1/8 inch); The test was conducted according to ASTM D638. ■ Bending test (1/8 inch); The test was conducted according to ASTM D790. ■ Izod impact test; The test was conducted according to ASTM D256. ■ Tensile properties of the weld part: As shown in Figure 1, the lengths are 165 mm (a in the figure),
b) in the figure, width 19mm (c in the figure), 13mm (d in the figure)
A molded piece was made using a mold having a thickness of 3 mm, in which molten resin flowed from both ends and a weld portion 1 was formed in the center. This molded piece is ASTM D638
A tensile test was conducted according to the tensile test method of 2003, and the tensile strength and tensile elongation were measured. In the figure, 2 indicates a sprue, 3 indicates a runner, and 4 indicates a test piece.

[0017]

[Examples 1 to 4, Comparative Examples 1 to 2] PPS, PA, and CP were prepared in a PCM45 (L/D = 33.5) twin-screw extruder manufactured by Ikegai Tekko Co., Ltd. with the compositions shown in Table 1.
Melt and knead at a cylinder temperature of 290 to 310°C,
The mixture was further pelletized to obtain a composition. This composition is applied to the cylinder at a set temperature of 290 to 300°C and a mold temperature of 90 to 120°C.
Table 2 shows the results of injection molding at ℃ and measurement of physical properties.

[0018]

[Table 1]

[0019]

[Table 2]

[0020]

[Effect of the invention] The alloyed resin composition of the present invention has
It has excellent weld properties, as well as excellent mechanical properties, heat resistance, and chemical resistance. , delivery pipes, air ducts, etc.).

[Brief explanation of the drawing]

FIG. 1 is a plan view of a mold for producing a test piece used in an example of the present invention.

Claims (1)

[Claims] [Claim 1] Polyphenylene sulfide resin 5-
An alloyed resin composition prepared by blending 0.001 to 10 parts by weight of an alkoxy group-containing compound to 100 parts by weight of a resin mixture consisting of 95% by weight and 95 to 5% by weight of polyamide resin.