JPH0339345A - Poly 4-methyl-1-pentene resin composition - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a poly-4-methyl-1-pentene resin composition, and more specifically to a poly-4-methyl-1-pentene resin composition having excellent rigidity, heat resistance, surface peeling resistance, etc. -1-Regarding a pentene resin composition.

[Conventional technology]

Poly-4-methyl-1-pentene resin has excellent transparency and chemical resistance, and is used in a wide range of applications such as medical equipment, physical and chemical laboratory equipment, microwave tableware, and baking cartons. However, it has poor strength and rigidity. Because of its inferiority, its uses are often restricted, so a method of incorporating an inorganic filler into poly-4-methyl-1-pentene resin has been used to improve its rigidity. However, when an inorganic filler is mixed, there are problems such as a marked deterioration in the appearance of the molded product.

Furthermore, in Japanese Patent Application Laid-open No. 59-223749, 4,4'
- A surface peeling resistant polycarbonate resin composition containing a dioxydiphenylalkane polycarbonate resin and an unsaturated carboxylic acid modified polyolefin is disclosed However, it is still insufficient.

[Problem to be solved by the invention]

The purpose of the present invention is to improve the rigidity and heat resistance of poly-4-methyl-1-pentene resin, and to create a poly-4-methyl-1-pentene resin composition that has excellent surface peeling resistance and gives beautiful appearance to molded products. It is to provide.

[Means to solve the problem]

The present invention provides hydroxyl group-containing (meth)acrylate modified poly(4)
-4.4'- to 100 parts by weight of methyl-1-pentene resin
Dioxydiphenylalkane polycarbonate resin 5
Poly 4 characterized by containing ~lOO parts by weight
-Methyl-1-pentene resin composition.

Hydroxyl group-containing (meth)acrylate-modified poly-4-methyl-1-pentene resin (hereinafter referred to as modified poly-4-pentene resin) used in the present invention
-Methyl-1-pentene resin) is a poly-4-methyl-1-pentene resin modified with a hydroxyl group-containing (meth)acrylate.

Poly4 before being modified with hydroxyl group-containing (meth)acrylate
-Methyl-1-pentene resin (hereinafter referred to as unmodified poly-4-methyl-1-pentene resin) is a homopolymer of 4-methyl-1-pentene or 4-methyl-1-pentene resin.
- pentenes and other α-olefins, such as ethylene, propylene, 1-butene, l-hexene, l-octene,
A copolymer with an α-olefin having 2 to 20 carbon atoms such as l-decene, 1-tetradecene, and ■-octadecene, and usually contains 4-methyl-1-pentene in an amount of 85 mol% or more, preferably 91 mol% or more. It is a polymer mainly composed of 4-methyl-1-pentene. Melt flow rate of unmodified poly-4-methyl-1-pentene resin (load: 5 kg, temperature:
260°C) is preferably in the range of 0.5 to 500 g/lO min, particularly preferably in the range of 5 to 150 g/10 min.

As the above-mentioned unmodified poly-4-methyl-1-pentene resin, commercially available poly-4-methyl-1-pentene resin may be used.
Pentene resin can be used.

Examples of the hydroxyl group-containing (meth)acrylate that modifies the unmodified poly-4-methyl-1-pentene resin include 2-hydroxyethyl acrylate, 2-hydroxyethyl methacrylate, 2-hydroxypropyl acrylate, 2-hydroxypropyl methacrylate, Examples include 3-hydroxypropyl acrylate and 3-hydroxypropyl methacrylate. Among these, 2
-Hydroxypropyl acrylate is preferred.

The proportion of water a group-containing (meth)acrylate contained in the modified poly-4-methyl-1-pentene resin is 0.
1 to 10% by weight, preferably 0.5 to 5% by weight is preferred.

In order to produce a modified poly-4-methyl-1-pentene resin, for example, an unmodified poly-4-methyl-1-pentene resin and a hydroxyl group-containing (meth)acrylate may be reacted while being heated and melted, or both may be reacted in an appropriate manner. There are methods of reacting after dissolving in a solvent, and methods of reacting both in a solid state such as powder. Through these modification reactions, the hydroxyl group-containing (meth)acrylate is graft-polymerized onto the unmodified poly-4-methyl-1-pentene resin to obtain a modified poly-4-methyl-1-pentene resin.

The temperature of the modification reaction is usually 250 to 300°C, preferably 2
70-280°C is preferred. Further, in order to accelerate the reaction, it is preferable to carry out the reaction in the presence of a radical initiator.

Examples of the radical initiator include benzoyl peroxide, dicumyl peroxide, α,α-bis(t-butylperoxydiisopropyl)benzene, and 2,5-dimethyl-2,5-di(t-butylperoxy)hexyne. -3, cumene hydroperoxide, lauryl peroxide, 2,5-dimethyl-2,5-di(t-butylperoxy)hexane, di-t-butyl peroxide,
Organic peroxides such as t-butyl hydroperoxide; azobis compounds such as azobisisobutyronitrile; and the like. The amount of the radical initiator added is not particularly limited, but it is usually 0.0i to 20 parts by weight, preferably 0.02 to 5 parts by weight, based on 100 parts by weight of the unmodified poly-4-methyl-1-pentene resin. .

The degree of modification can be controlled by adjusting the amount of hydroxyl group-containing (meth)acrylate used, reaction temperature, reaction time, type and amount of radical initiator used, etc.

In the present invention, by modifying an unmodified poly-4-methyl-1-pentene resin with a hydroxyl group-containing (meth)acrylate, it is possible to improve uniform dispersibility and interface with the 4,4'-dioxydiphenylalkane-based polycarbonate resin described below. Adhesion can be improved.

Examples of the 4,4'-dioxydiphenylalkane-based polycarbonate resin used in the present invention include 4,4'-dioxydiphenylalkane-based polycarbonate resin.
, 4'-dioxydiphenylalkane polycarbonate resin, 4.4'-dioxyhalogenated diphenylalkane polycarbonate resin, combination of 4,4'-dioxydiphenylalkane polycarbonate and 4°4'-dioxyhalogenated diphenylalkane Alkanes constituting the polycarbonate resins include condensed polycarbonate resins, and examples thereof include methane, ethane, propane, butane, and halogens include chlorine, bromine, and iodine.

The above-mentioned 4,4'-dioxydiphenylalkane polycarbonate resins can be used alone or in combination of two or more.

The blending ratio of the modified poly-4-methyl-1-pentene resin and the 4,4'-dioxydiphenylalkane-based polycarbonate resin in the poly-4-methyl-1-pentene resin composition of the present invention is as follows: The amount of the 4.4'-dioxydiphenylalkane polycarbonate resin is 5 to 100 parts by weight, preferably 10 to 70 parts by weight, per 100 parts by weight of the methyl-1-pentene resin.

By setting the blending ratio of modified poly-4-methyl-1-pentene resin and 4,4'-dioxydiphenylalkane-based polycarbonate resin within the above range, the poly4-methyl-1-pentene resin originally has It is possible to improve rigidity, heat resistance, surface peeling resistance, etc. while maintaining excellent properties such as transparency and appearance.

Although there is no particular problem in blending unmodified poly-4-methyl-1-pentene resin into the poly-4-methyl-1-pentene resin composition of the present invention, the amount of modified poly-4-methyl-1-pentene resin It is generally preferable to use 100 parts by weight or less per 100 parts by weight of the resin.

The poly-4-methyl-1-pentene resin composition of the present invention includes modified poly-4-methyl-1-pentene resin, 4.4'-
Dioxydiphenylalkane polycarbonate resin,
In addition to the unmodified poly-4-methyl-1-pentene resin, glass fibers, inorganic fillers such as talc, etc. can be blended.

The amount of the inorganic filler added is preferably 100 parts by weight or less per 100 parts by weight of the modified poly-4-methyl-1-pentene resin.

As a method for producing the poly-4-methyl-1-pentene resin composition of the present invention, known methods can be applied.
Methyl-1-pentene resin and 4,4'-dioxydiphenylalkane-based polycarbonate resin and other components added as necessary are extruded.

A method of mechanically blending using a kneader, Panbury mixer, roll, Brabender plastogram, etc., or a method of dissolving each component in a suitable good solvent, or a method of dissolving each component separately and then mixing, and removing the solvent. , and a method that combines these two methods.

The poly-4-methyl-1-pentene resin composition thus obtained has excellent rigidity, heat resistance, surface peeling resistance, etc., and the appearance of molded products is good.

Therefore, the poly4-methyl-1-pentene resin composition of the present invention can be used as a raw material for manufacturing medical instruments, physical and chemical laboratory instruments, microwave tableware, baking cartons, small motor parts, connectors, electronic component packages, etc. .

〔Effect of the invention〕

The poly-4-methyl-l-pentene resin composition according to the present invention is a poly-4-methyl-l-pentene resin composition modified with a hydroxyl group-containing (meth)acrylate.
-Since 4,4'-dioxydiphenylalkane-based polycarbonate resin is blended with methyl-1-pentene resin, both components have good uniform dispersibility and interfacial adhesion, resulting in rigidity, heat resistance, and surface peeling resistance. It has excellent properties such as properties, and also has an excellent appearance of molded products.

〔Example〕

EXAMPLES The present invention will be described below with reference to Examples, but the present invention is not limited to these Examples.

The following poly-4-methyl-1-pentene resin and 4,4'-dioxydiphenylalkane-based polycarbonate resin were used.

Poly 4-methyl-l-pentene resin manufactured by Nimitsui Petrochemical Industries, Ltd., TPX RT18. Product name: Melt Flowry 126g/10min (260°C), hereinafter sometimes abbreviated as TPX.

4.4'-Dioxydiphenylalkane-based polycarbonate resin: Teijin Chemical Co., Ltd. il! , Panlight L-12
50, Product name, Meltflow-18g/10 minutes (28
0°C), hereinafter sometimes abbreviated as PC.

Each performance was evaluated by the following method.

(1) Bending stress (FS) Using a 1/8 inch thick test piece, ASTM D-
790.

(2) Flexural Modulus (FM) Using a 178 inch thick test piece, ASTM D-
790.

(3) Heat distortion temperature (HDT) ASTM D-6 under load 18.6kg/a&
Measured according to 48.

(4) Vertical test Measured according to JIS 0202 General Rules for Automotive Parts Coating Films 8-12. As for the results, the presence or absence of adhesion of the surface layer of the molded article to the surface of the adhesive tape was visually determined, and the number of gobbles adhering to the adhesive tape out of 100 gobbles was measured.

Production Example 1 (Production of 2-hydroxypropyl acrylate modified poly 4-methyl-1-pentene resin) Poly 4-methyl-1-
To 100 parts by weight of pentene resin (TPX), 3 parts by weight of 2-hydroxypropyl acrylate (HPA) and 2,5-dimethyl-2,5-di(t-
butylperoxy)hexyne-3 (PH258)O,O
After adding and mixing parts by weight of S, the mixture was supplied to an extruder set at 300°C, and melt-kneaded to form pellets.

The pellets thus obtained were heated and dissolved in xylene at 130°C, and then allowed to cool. Acetone was added to the cooled solution to precipitate the polymer, which was filtered and dried to obtain HPA-modified TPX. As a result of measuring the infrared absorption spectrum of this polymer, it was found that 0.49% by weight of HPA was graft-polymerized in the polymer.

Production Example 2 (Production of maleic anhydride-modified TPX) f (MAR-modified TPX was produced in the same manner as Production Example 1 except that maleic anhydride (MAH) was used instead of PA.

Results of infrared absorption spectrum measurement of this polymer.

It was found that 0.56% by weight of MAH was graft-polymerized in the polymer.

Examples t-3 IPA-modified TPX (obtained in Production Example 1) and polycarbonate resin (PC) were mixed in the ratio shown in the topsoil to prepare a triblend. This triblend product was supplied to a twin screw extruder (L/D=30.44 mφ) set at 300°C to obtain a melt blend product. Thereafter, injection molding was performed under the following conditions to produce a substrate for measuring physical properties.

Cylinder temperature: 300℃ Injection pressure (1st 72nd): (io00kg/cd
)/(800 kg/cd) Mold temperature 250° C. Various physical properties of the specimen obtained as described above were measured. The results are shown in Table 1.

Comparative Examples 1 to 3 Modified TPX or unmodified TPX shown in Table 1, and PC
Specimen was produced in the same manner as in Example 1 using the following. Various physical properties of this specimen were measured. The results are shown in Table 1.

Claims (1)

[Claims] (1) Add 5 to 1 parts of 4,4'-dioxydiphenylalkane-based polycarbonate resin to 100 parts by weight of hydroxyl group-containing (meth)acrylate-modified poly4-methyl-1-pentene resin.
A poly-4-methyl-1-pentene resin composition, characterized in that it contains 00 parts by weight of poly(4-methyl-1-pentene).