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Resin composition for injection molding or compression molding

A resin composition and compression molding technology, which is applied in the field of resin compositions for injection molding or compression molding, can solve problems such as insufficient strength, difficulties in olefin copolymers, and difficulty in polymerization, and achieve excellent long-term durability

Pending Publication Date: 2022-02-08
JAPAN POLYETHYLENE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the molecular structure of the polar group-containing olefin copolymer produced by the high-pressure radical polymerization method is as follows: figure 1 As shown in the schematic diagram of , it is a structure with a large number of long-chain branches and short-chain branches irregularly, and has the disadvantage of insufficient strength.
[0006] On the other hand, although polymerization methods by using catalysts have been explored in the past, such as figure 2 The schematic diagram of the method for producing a polar group-containing olefin copolymer with a linear molecular structure, but the polar group-containing monomer is generally a catalyst poison, so polymerization is difficult. In fact, it has been considered for many years that the industrial It is difficult to obtain polar group-containing olefin copolymers with desired physical properties by cheap and stable methods

Method used

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  • Resin composition for injection molding or compression molding
  • Resin composition for injection molding or compression molding
  • Resin composition for injection molding or compression molding

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0149] (preparation of samples)

[0150] For the sample, a 1 mg / mL solution was prepared using ODCB (0.5 mg / mL of BHT (containing 2,6-di-tert-butyl-4-methylphenol)), and dissolved at 140° C. for about 1 hour.

[0151] (calculation of molecular weight (M))

[0152] It was carried out by the standard polystyrene method, and the conversion from the retention capacity to the molecular weight was performed using a calibration curve based on standard polystyrene prepared in advance. The standard polystyrene used is, for example, commercial products manufactured by Tosoh Corporation (F380, F288, F128, F80, F40, F20, F10, F4, F1, A5000, A2500, A1000), monodisperse polystyrene manufactured by Showa Denko ( S-7300, S-3900, S-1950, S-1460, S-1010, S-565, S-152, S-66.0, S-28.5, S-5.05 each 0.07mg / ml solution), etc. A calibration curve was prepared by injecting 0.2 mL of a solution obtained by dissolving each standard polystyrene in ODCB (containing 0.5 mg / mL of BHT) so as to be 0.5 mg / m...

Embodiment

[0313] Examples and comparative examples are given below to describe the present invention more specifically, but the present invention is not limited to these examples.

[0314] In addition, the measurement and evaluation of the physical property in the Example and the comparative example were implemented by the method shown below.

[0315] In addition, no data in the table means that it has not been determined, and not detected means that it is below the detection limit.

[0316]

[0317] (1) Determination of the phase angle δ (G*=0.1MPa) at the absolute value of the complex modulus G*=0.1MPa

[0318] 1) Preparation and measurement of samples

[0319] Put the sample into a hot press mold with a thickness of 1.0mm, preheat it in a hot press with a surface temperature of 180°C for 5 minutes, and degas the residual gas in the molten resin by repeated pressurization and decompression. Pressurize at MPa and keep it for 5 minutes. Thereafter, it was transferred to a press hav...

manufacture example 1～ manufacture example 5

[0453]

[0454] Using transition metal complexes (B-27DM / Ni complex or B-423 / Ni complex), ethylene / t-butyl acrylate copolymers and ethylene / t-butyl acrylate / norbornene copolymers were produced. Referring to Production Example 1 or Production Example 3 described in Japanese Patent Application Laid-Open No. 2016-79408, the copolymer was produced, and the type of metal catalyst, the amount of metal catalyst, the amount of trioctylaluminum (TNOA), the amount of toluene, and the comonomer Table 1 shows the production conditions and production results with appropriately changed types, comonomer amounts, ethylene partial pressure, polymerization temperature, polymerization time, etc., and Table 2 shows the physical properties of the obtained copolymers.

[0455] [Table 1]

[0456] Table 1

[0457]

[0458] [Table 2]

[0459] Table 2 E / tBA / x copolymerization results

[0460]

[0461]

[0462] 40 g of the obtained copolymers of Production Examples 1 to 5, 0.8 g of p-toluen...

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Abstract

The present invention provides a resin composition for injection molding or compression molding, said resin composition using an ethylene ionomer that has excellent impact strength, heat resistance and long-term durability. The resin composition for injection molding or compression molding, said resin composition being characterized by containing an ionomer that is characterized by being obtained by converting at least some of carboxyl groups and / or dicarboxylic acid anhydride groups in a copolymer (P), which contains, as essential constituent units, a constituent unit (A) derived from ethylene and / or an alpha-olefin having 3 to 20 carbon atoms and a constituent unit (B) derived from a monomer having a carboxyl group and / or a dicarboxylic acid anhydride group, into a metal-containing carboxylic acid salt that contains at least one kind of metal ion selected from among group 1, group 2 and group 12 elements of the periodic table, said ionomer being also characterized in that the phase angle delta at the position where the absolute value G* of the complex elastic modulus is 0.1 MPa as determined by a rotational rheometer is from 50 degrees to 75 degrees.

Description

technical field [0001] The present invention relates to a resin composition for injection molding or compression molding using a novel ionomer. Background technique [0002] As a molding method of the resin, there are injection molding and compression molding. Injection molding is to heat and melt the molding material to make it into a plastic state, inject it into the cavity of a pre-closed mold, and solidify it by cooling (thermoplastic resin) or heating (thermosetting resin) to obtain a molded product. Molded products with good dimensional accuracy can be obtained stably and with high productivity. In compression molding, a molding material is placed in a mold consisting of an upper mold and a lower mold while the mold is open, and the mold is closed while being heated and melted. After shaping and solidifying, the mold is opened and the molded product is taken out. The molding machine and the mold structure are relatively simple and inexpensive, and a large molded prod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F8/42C08F210/02C08F220/18C08F232/08C08F220/06C08L23/26
CPCC08F8/42C08L23/26C08L2201/08C08F210/02C08F220/1804C08F232/08C08F220/06C08F220/04C08L23/0876C08F8/44C08F4/7031C08F2500/27C08F2500/34C08F2500/35C08F2500/02C08F2500/03C08F2500/10B29C43/003B29C45/0001B29K2023/06C08F4/70C08F222/04
Inventor 吉本圭一上松正弘安田薫
Owner JAPAN POLYETHYLENE CORP
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