JPS63215764A - Thermoplastic resin composition - Google Patents

Abstract

PURPOSE:To obtain a resin compsn. which has excellent impact and chemical resistance and a high deformation temp. under load, by blending an arom. polycarbonate with an arom. polysulfone and a modified polyolefin copolymer. CONSTITUTION:A compsn. is obtd. by blending 2-90wt.% arom. polycarbonate (A) with 5-95wt.% arom. polysulfone (B) and 1-20wt.% modified polyolefin copolymer (C). The modified polyolefin copolymer (C) is at least one copolymer selected from among those of an alpha-olefin with glycidyl methacrylate and/or glycidyl acrylate and those of an alpha-olefin with ethyl acrylate and/or methyl methacrylate. The compsn. itself has sufficient mechanical strengths and dimensional strength. However, an inorg. filler and an inorg. fiber may be added, if necessary.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a resin composition, more specifically, a resin composition having excellent mechanical properties (impact strength in %), high deflection temperature under load, and chemical resistance. Concerning an excellent resin composition.

<Prior Art> The present invention is a resin composition comprising a three-component mixture of aromatic polycarbonate, aromatic polysulfone, and modified polyolefin.

Aromatic polycarbonate resin is known as a resin with excellent mechanical properties and has various application fields.
Molded products may crack when they come into contact with organic solvents, etc., and impact strength of thick molded products may decrease depending on the shape. Furthermore, in recent years, the number of fields requiring high deflection under load has increased, and improvements are desired.

Aromatic polysulfone has a higher deflection temperature under load than polycarbo*-)K and has excellent mechanical properties, but has the drawback of low Fizot impact strength. Techniques for improving these drawbacks include, for example, two-component mixtures of polycarbonate-polyolefin, bossulfone-polyolefin, and polycarbonate-polysulfone, but each of them has its own drawbacks. Furthermore, a mixture of polycarbonate, polysulfone, and polyolefin (Japanese Unexamined Patent Application Publication No. 126756/1982) was proposed as a three-component mixture, but because the compatibility between the polyolefin and other resins was poor, 7I was added to the gate part etc. during injection molding. : There were defects such as +- marks and layer peeling. In addition, the impact value and mechanical properties of the isotsuto notch at low temperatures are low.

This was not sufficient as a resin composition with well-balanced moldability and chemical resistance. The inventors of the present invention conducted studies to improve these drawbacks and found that a three-component mixture consisting of polycarbonate, polysulfone, and a modified polyolefin copolymer has excellent properties.

<Object of the Invention> An object of the present invention is to provide a resin composition having excellent mechanical properties, heat resistance, and chemical resistance.

<Structure of the Invention> The present invention comprises 2 to 90% by weight of aromatic polycarbonate.
A resin composition containing 5 to 95% by weight of Bl aromatic polysulfone (C) 1 to 20% by weight of modified polyolefin copolymer.

The aromatic polycarbonate prisoner used in the present invention is
Average publication 1110 derived from 2fffi phenol
,000 to 100,000, preferably i 5,000
~60,000 polycarbonate, typically 2
It is produced by a solution method or a melt method using a hydric phenol and a carbonate precursor. Typical examples of dihydric phenols include bisphenol A (2,2-bis(4-hydroxyphenylpropane)), bis(4-hydroxyphenyl)methane, and t,i-his(4-hydroxyphenyl).
Eta: /l 2 t 2-bis(4-hydoxy-3-
methylphenyl)purpan, etc. Favorable dihydric phenols are bis(4-hydroxyphenyl)alkane compounds, 4? and bisphenol A. Dihydric phenols can be used alone or in combination of two or more. Further, the carbonate precursor is carbonyl halide.

Carbonate or 'tt8-formate may be mentioned. Representative examples include phosgene, diphenyl carbonate, dihaloformates of dihydric phenols, and mixtures thereof. When producing aromatic polycarbonate, a suitable molecular weight regulator 9-branching agent,
Catalysts etc. can also be used.

The aromatic polysulfone ((8) in the present invention is a linear thermoplastic poly7-arylene polyether bolysulfone in which an arylene unit has an ether bond and a sulfone bond. Polysulfone is a well-known polymer, and the preferred one is represented by the following formula [wherein R is a divalent hydrocarbon group having 8 or less carbon atoms, and Yl and Y are respectively a furkyl group having 1 to 4 carbon atoms or a flufoxy group having 1 to 4 carbon atoms, and m is O or an integer of 1 to 4. More preferably, in the above formula, ! and m are O, and R is -C- (herein, R'o and R can be the same or different and R", and they are hydrogen, lower (selected from the group consisting of furkyl, lower heptalyl and their hapgone substituents)
It is a thermoplastic aromatic polysulfone. More specifically, the following structural formula may be mentioned. Here, n indicates the degree of unity.

HI Among these, the above (al) polymers are particularly preferred.

The aromatic polysulfone can be produced by a known method. Generally, it is produced by reacting an alkali metal salt of a dihydric phenol with a dihalobenzemade compound. In the above reaction, it is preferable to use a solvent such as dimethyl sulfoxide, dimethyl sulfone, diethyl sulfoxide, diethyl sulfone, diisopropylsulfone, and tetrahydrothiophene-1-dioxide. Aromatic polysulfone is about 0.35 or more, and even about 0.35 or more.
Those having a reduced viscosity of 4 or more are preferred.

The modified polyolefin copolymer tc) in the present invention is
α-olefin and glycidyl methacrylate and/or
or a copolymer consisting of at least lai selected from the group consisting of a copolymer 1a) with glycidyl acrylate and a copolymer +bl of an α-olefin with ethyl acrylate and/or methyl methacrylate.

Specific examples of the α-olefin in the copolymer ta> are ethylene, propylene, butene-1゜inbutylene,
Examples include pentene-1, hexene-1°heptene-1, and the like. Among these five, particularly preferred are ethylene and propylene. Further, the copolymer tal may be any of a random copolymer, a pulsing copolymer, and a graft copolymer. Furthermore, this copolymer tal may contain an α-olefin, glycidyl methacrylate, and a vinyl compound other than glycidyl acrylate as a copolymerization component. Specific examples of copolymerizable vinyl compounds other than α-olefin, glycidyl methacrylate, and glycidyl acrylate include styrene and vinyl acetate! Vinyl chloride t-methyl acrylate.

α-methylstyrene, divinylbenzene, acrylic acid,
Tetrafluoroethylene, difluoroethylene, vinylidene chloride, acrylonitrile.

Examples include acrylic acid 7mide.

Specific examples of the α-olefin in copolymer (b) include ethylene, propylene, and butene-1゜butylene!
Penten-1. Examples include hexene-1°heptene-1. Among these, particularly preferred are ethylene and propylene. Further, the copolymer lb) may be a random copolymer, a block copolymer, or a graft copolymer. Furthermore, this copolymer may contain a vinyl compound other than α-olefin, ethyl acrylate, and methyl methacrylate as a copolymerization component.

Specific examples of copolymerizable vinyl compounds other than α-olefins, ethyl acrylate, and methyl methacrylate include styrene, vinyl acetate, vinyl chloride, methyl heptaacrylate, α-methylstyrene, divinylbenzene, acrylic acid, and tetrafluoride. diethylene, difluoropoethylene and vinylidene chloride.

acrylate) lyl, acrylic acid 7mide, etc.

The resin composition of the present invention comprises the above-mentioned compounds, CB+ and (q
It is manufactured by mixing three types of components. The mixing ratio is 2 to 90% by weight of component (4) and 5 to 9% of component CB+.
5% by weight, and component (C) from 1 to 20% by weight. Sara K
Preferably, the ingredient content is 20 to 5 oz and the component (B) is 15 to 75 oz. The amount of component (C) is 2 to 6% by weight.

The mixing ratio is closely related to mechanical properties, moldability, and chemical resistance, and if any of the components deviates from the above-mentioned mixing ratio, the balance of these properties will be lost, and therefore it is not appropriate. (
Component C) is involved in impact strength and chemical resistance, and as the amount added increases, K shows a higher value, but if it exceeds 20% by weight, the molded product will peel or the thermal properties will deteriorate. Undesirable.

The resin composition consisting of the above-mentioned compound (B) and IQ has sufficient mechanical strength and dimensional properties by itself, but an inorganic filler and an inorganic fiber may be further added thereto.

Inorganic fillers include talc, silica, and diatomaceous earth.

Examples include mica, alumina, and calcium carbonate. Examples of non-molecular fibers include glass Ni fibers, carbon fibers, and voice fibers.

There are no particular limitations on the method for producing the resin composition of the present invention, and nine common known methods can be used.

From an industrial standpoint, the common methods include tri-blending each component using a tumbler, blender, Nauta mixer, etc., and then melt-mixing and extruding the mixture, or kneading it using an extruder equipped with an automatic metering feeder.

In any case, conditions and equipment may be selected so that each component is sufficiently dispersed and mixed.

Specific examples of devices that mix wires include a Henbury mixer, a kneading mill, an extruder, and a kneader. Furthermore, it is also possible to add lubricants, stabilizers, antioxidants, ultraviolet absorbers, etc. within a range that does not impair the purpose of the present invention.
Furthermore, other resins such as polystyrene, ABS resin.

AS resin, polyphenylene oxide, polyamide, polyimide, phenol resin, etc. may be added.

<Effects of the Invention> The resin composition of the present invention thus obtained can be applied to known conventional molding methods such as injection molding, extrusion molding, compression molding, and rotational molding.

The molded product thus obtained has excellent mechanical properties, particularly impact strength, a high deflection temperature under load, and excellent chemical resistance, and is a useful material from an industrial perspective.

EXAMPLES The present invention will be specifically explained below with reference to Examples.

Examples 1-5. Comparative Examples 1 to 3 Polycarbonate, polysulfone, modified polyolefin copolymer <1) l (2) was triblended in a blender at the blending ratio shown in Table 1, and then melted and mixed at a cylinder temperature of 280°C using a 30711φ extruder. did. The obtained pellets were put into an injection molding machine at a cylinder temperature of 28°C.
A physical property test piece was prepared at 0° C., and its tensile strength, impact strength, and heat distortion temperature were measured according to ASTM standards. Furthermore, as a comparative example, a system in which polyethylene was added instead of component (0) was similarly tested.

Furthermore, as a chemical resistance test, a gasoline resistance test was conducted using the method shown below. Surface strain of tensile test piece is 0.75
After fixing the sample in a jig so that the sample was fixed in a horizontal position, the sample was immersed in regular gasoline at 30°C for 10 minutes, air-dried, and then subjected to a tensile test. The presence or absence of cracks, yield strength, and elongation at break were measured.

The results obtained are shown in Table-1.

Procedural amendment April ID day, 1986

Claims (1)

[Claims] 1. Thermoplastic material containing (A) 2-90% by weight of aromatic polycarbonate (B) 5-95% by weight of aromatic polysulfone (C) 1-20% by weight of modified polyolefin copolymer Resin composition. 2. The modified polyolefin copolymer is a copolymer of α-olefin and glycidyl methacrylate and/or glycidyl acrylate, and a copolymer of α-olefin and ethyl acrylate and/or
or methyl methacrylate.