JPS60171112A - Phenol resin molded article - Google Patents

Abstract

PURPOSE:To obtain the titled molded article that is tough and suitable for an electric appliance, motorcar, ship and communicating appliance, etc. by a method wherein rubber modified phenol resin molding material that contains vulcanizing agent is molded in heating and under pressure, then, heated and hardened. CONSTITUTION:Rubber such as terminal carboxylic nitril rubber compartible with phenol and vulcanizing agent such as sulfur, zinc oxide, etc. and, if desired, vulcanization accelerator, antioxidant are mixed with phenol resin obtained from single or combined phenol such as phenol, crezol, xylenol, etc., molded in heating and under pressure, then, heated to obtain the desired molded article.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to phenolic resin molded products that require toughness and are used in electrical equipment, automobiles, ships, communications equipment, and the like.

[Background technology]

Conventionally, molded products made from phenol-V resin, which require high toughness, could not be obtained using molding materials made of phenol resin alone, but instead were made by mixing phenol resin with rubber or by co-condensing phenol, epoxy, and rubber. However, in each case, the toughness was insufficient and the distortion was large.

[Purpose of the invention]

An object of the present invention is to provide a pheno-V resin molded article having toughness.

[Disclosure of the invention]

The present invention is a phenolic resin molding material which is produced by heat-pressing molding a rubber-modified phenolic resin molding material containing a vulcanizing agent, and then heat-treating the molded product to post-cure it. It is possible to obtain a phenolic resin molded product that exhibits sufficient toughness and has a toughness that is not found in conventional products.The present invention will be explained in detail below.Vulcanizing agent-containing rubber used in the present invention Modified pheno-V
The resin molding material must contain a vulcanizing agent that corresponds to the rubber to be added.The rubber may be one that is compatible with the phenol and the reactive acid, such as nitrile rubber or carboxylic acid-terminated nitric V rubber. Although not particularly limited, it is preferable to use a terminal carboxylic acid nitrile rubber with better compatibility.

Further, the amount of rubber added is not particularly limited as it can be adjusted depending on the required degree of toughness. As the vulcanizing agent, ordinary sulfur, zinc oxide, etc. can be used as is.

Furthermore, vulcanization accelerators, antioxidants, etc. can be used as necessary. The amount of vulcanizing agent to be added is not particularly limited, but it is desirable to use 0.5 to 5 times as much vulcanizing agent as the double bond. Pheno-v resin is pheno-v
Phenol resins consisting of phenols such as xylenol or mixtures, especially phenol-V
It may also be a phenol resin compatible with naphthalene, molasses, epoxy, etc. The above rubber, vulcanizing agent,
As additives other than phenol fat removal, commonly used curing agents such as hexamine, mold release agents, clouding agents, reinforcing agents, and fillers can be used as they are, and can be mixed, kneaded, crushed, and granulated if necessary. , a rubber-modified fumono resin molding material containing a vulcanizing agent is used. Next, the above-mentioned molding material can be molded under heat and pressure using a conventional method, and the molded product can be made into a tough molded product by post-curing the molded product by heat treatment. The heat treatment conditions are not particularly limited, and the optimum heat treatment conditions can be selected depending on the molding material.

The present invention will be explained below using examples.

Example 1 A molded product was obtained by molding a pheno-JVA fat type material containing 20% of terminal strength I leponate nitrile rubber containing sulfur and zinc oxide as a vulcanizing agent at a molding pressure of 9f/cd at 170°C for 90 seconds. Further heat treatment was performed at 120° C. for 2 hours to complete post-curing, and a resin molded product was obtained using phenol.

Example 2 An epoxy-modified phenolic resin molding material containing powdered 11M carboxylic acid nitric V rubber containing sulfur and zinc oxide as a vulcanizing agent + o % was molded at a molding pressure of xso Kgf/c 4.175°C
The molded product obtained by molding for 120 seconds was further heat-treated at 160° C. for 6 hours to avoid post-curing, and a pheno-A/resin molded product was obtained.

Conventional example A 20% nitrite rubber mixed phenol M resin molding material containing no vulcanizing agent was molded at a pressure of 1so 11g f/ctl, 1
A phenol resin molded product was obtained by molding at 70° C. for 90 seconds.

Comparative Example The same molding material as Example 2 was used at a molding pressure of 150 K9 f/
Cd and molded at 175° C. for 120 seconds to obtain a phenol resin molded product.

〔Effect of the invention〕

Examples 1 and 2, conventional example and comparison 11/lj pheno-M
As for the properties of the resin molded products, as is clear from Table 1, the phenol resin molded products of the present invention had great strength<ffl properties, confirming that the present invention is superior.

Happy 1 table

Claims (1)

[Claims] (1) A pheno-V resin molded article, which is obtained by heat-pressing molding a rubber-modified phenolic resin molding material containing a vulcanizing agent, and then heat-treating and post-curing the molded article.