JPS60190447A - Phenolic resin composition and its production - Google Patents

Abstract

PURPOSE:To provide the titled composition compounded with fibers having specific length, giving a molded article having remarkably improved strength, and suitable for the parts of vehicle, etc. CONSTITUTION:All components of a phenolic resin composition except for fibers are kneaded and crushed, and fibers (e.g. asbestos, glass fibers, etc.) having a fiber length of 2-9omega are added to the mixture and lightly mixed. As an alternative method, a composition compounded with fibers having fiber length of longer than 2-9mm. is mixed and crushed to break the fibers to 2-9mm. length. The amount of the fiber is preferably 20-70wt% based on the whole composition.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field 1] The present invention relates to a 7-el/I (fat composition) containing #&fiber and a method for producing the same.

[Background technology 1 Aluminum alloys have traditionally been used as vehicle parts due to their light weight, toughness, and rust resistance, but recently, the use of plastic parts is being considered in order to further reduce weight. . Among these, phenolic resin molded products are expected to be used because they are inexpensive and meet various performance requirements. By the way, in order to increase the strength of 7-mol resin molded product compositions, fibers such as asbestos, glass fibers, cloth, etc. have been included in the past, but these M&
Since the fiber length of each fiber is less than 1.1 m and is used simply as a powder filler, there is a problem that the strength is not sufficient.

[Object of the Invention 1 The present invention has been made in view of the above α, and
The object of the present invention is to provide a phenolic resin #11 composition that can effectively increase the strength of a 7-7-l resin molded product by adding navy blue and a method for producing the same.

[Disclosure 1 of the Invention That is, the 7-7-l resin composition of the present invention
It is characterized by containing fibers with a length of 2 to 9+ nm, and by using fibers with a good fiber length,
- In order to increase the strength of the resin molded product, the method for producing the phenol resin composition includes kneading and pulverizing the compound excluding fibers, and then adding and mixing fibers with a fiber length of 2 to 9 m+n. Fiber length 2 to 9 III 11 or more] A mixture of two fibers is mixed and crushed, and the fibers are cut and am
It is characterized by mixing and pulverizing the blend so that the fiber length is 2 to 9 + n + n, and the fiber length of the final fiber after mixing and pulverization is 2 to 9 IfllG. The purpose has been achieved.

The present invention will be described in detail below based on illustrated embodiments.

Fibers used in the present invention include asbestos, glass fiber,
Both inorganic and organic fibers such as cloth can be used. The i chores of these fibers are 2 to 91flll.
If the fiber length is less than 2m+n, high-strength molded products cannot be obtained, and if the fiber length exceeds 9mm, the filling properties during molding will decrease. The appearance also deteriorates. Particularly preferably 6+nm
degree is preferred. A phenol resin composition is obtained by adding all of these fibers to a phenol resin, and adding and mixing a catalyst such as hexamethylenetetramine, a filler colorant, a mold release agent, a stabilizer, etc. as necessary. It is. Here, as the phenol resin, resins such as phenol, cresol, xylenol, and modified phenol resins with molasses, naphthalene, xylene, lignin, etc. can be used. Furthermore, both a resol type phenol resin and a novolac type 7 ether resin can be used. The amount of fiber blended is 20~20% of the total amount of the composition.
It is preferably 70% by weight; if it is less than 20% by weight, the strength will not be sufficient, and if it exceeds 70% by weight, the filling properties and appearance during molding will deteriorate. When blending fibers, -
After thoroughly cross-pulverizing the mixture excluding the fibers described in 1., N&fibers are added and lightly mixed to prevent the fibers from being cut during cross-crossing.

3- Therefore, the obtained phenolic resin composition has i slenderness 2
~9m+n of ram is blended, and it is possible to increase the strength of the phenol resin molded product obtained by molding this composition. In the above example, after mixing and pulverizing the resin mixture, fibers of 41 fibers and 2 rams = 9 ram were added and mixed. It may be added and cross-pulverized so that the fiber length becomes 2 to 9+ nm. In that case, the aIlt is cut simultaneously with the crushing of the resin compound to obtain WL fibers with a fiber length of 2 to 9+ nm, and the fiber length is adjusted by adjusting the crushing time of the compound, etc. According to this method, the production time can be shortened by simultaneously pulverizing the compound and cutting the fibers.

Next, the present invention will be specifically explained based on conventional examples and examples.

Conventional example - 35 parts (hereinafter simply referred to as parts) of 7-borac type phenolic resin with a melting point of 90°C, 4 parts of hexamine, 1 part of 4-zinc stearate, and 20 parts of 1 m glass fiber 40 parts of calcium carbonate were simultaneously kneaded and ground to obtain a phenol resin composition.

26 parts of novolac type 7-el resin at 90°C,
After mixing and pulverizing 3 parts of hexamine and 1 part of zinc stearate, 70 parts of asbestos having a fiber length of 3/n was added and mixed to obtain a 7-7-l resin composition.

``Dog 1 Remains'' - 31 parts of 7-borac type phenolic resin with a melting point of 90°C, 4 parts of hexamine, and 1 part of zinc stearate were mixed and pulverized, followed by 25 parts of asbestos with a fiber length of 3111111 and glass fibers with a fiber length of 9 mm. 20 parts and 19 parts of calcium carbonate were added and mixed to obtain a phenol resin composition.

Example 1 - 35 parts of 7-borac type phenolic resin with a melting point of 90°C, 4 parts of hexamine, and 1 part of zinc stearate were mixed and pulverized, and then 20 parts of glass fiber with a fiber length of 9 mm and 40 parts of calcium carbonate were each mixed. The mixture was added and mixed to obtain a phenol resin composition.

1 example - (31 parts of novolac type phenolic resin with a melting point of 90°C,
4 parts of hexamine, 1 part of zinc stearate, 20 parts of glass fiber with a fiber length of 15 mm, and 40 parts of calcium carbonate.
Knead and crush each portion at the same time, and when the fiber length of the glass fibers reaches a range of 2 to 9+ nm, stop mixing and mix.
A 7-1 resin composition was obtained.

Example 1 was melted and 31 parts of 7volac type 7er resin at 90℃ was added.
4 parts of hexamine, 1 part of zinc stearate, and 25 parts of asbestos with a fiber length of 5+nl11, i fiber 1.5 m
20 parts of +o glass fiber and 19 parts of calcium carbonate were kneaded and crushed at the same time to form asbestos and glass N.
When the fiber length of the fibers was in the range of 2 to 9111+11, the mixing was stopped to obtain a 7-el fj (fat composition).

Next, the resin compositions obtained in the above conventional examples and examples were molded for 5 minutes at a molding pressure of 150 kg/cI at 112.degree. The fiber length was measured.

The strength of the molded product was expressed by the number of rotations at which the molded product broke when rotated at 250°C.

As mentioned above, all of the products in this example have a slenderness of 2 to 9.
It can be seen that the strength of the molded product is excellent within the range of +am.

[Effects of the Invention] As mentioned above, since the 7271 resin composition of the present invention contains fibers with an R & fiber length of 2 to 9+ nm, it is possible to increase the strength of the 7271 component by -E. It can be used as an excellent automobile part. Further, as a second invention, the method for producing the phenolic resin composition of the present invention is such that after mixing and pulverizing the compound excluding fibers, the fiber length is 2 to 9+.
Since the i-fibers with a fiber length of 2 to 9 TQIQ are added and mixed, it is possible to reliably contain fibers with a fiber length of 2 to 9 TQIQ.
The blend containing the above T&fibers is mixed and crushed to have a fiber length of 2.
Since the delicate fibers are cut so as to have ~916 Ill, even fibers with long p and nm fibers can be used by cutting the M and fibers at the same time when mixing the 7-7 resin composition. Moreover, a phenol resin composition can be obtained in a short time and with good productivity.

Agent Patent Attorney Ishi 1) Ai Shichi -day-

Claims (4)

[Claims] (1) A phenolic resin composition characterized by containing fibers having a fiber length of 2 to 916,111. (2) The phenolic fat composition according to claim 1, wherein the fiber is blended in an amount of 20 to 70% by weight based on the total amount. (3) A method for producing a phenolic resin composition, which comprises mixing and pulverizing the blend excluding fibers, and then adding and mixing fibers having a fiber length of 2 to 9+ nm. (4) Cross-mixing and pulverizing a blend containing fibers of m<2-9+n+n or more, cutting the fibers and reducing the fiber length to 2-9
A method for producing a 7-el resin composition, which comprises mixing and pulverizing the blend so that m + n.