JPH0442422B2 - - Google Patents

Description

[Detailed description of the invention]

[Technical Field of the Invention] The present invention relates to a resin composition having excellent heat resistance and mechanical strength. [Technical background of the invention and its problems] Resins made of cyanoaryl ether polymers have excellent heat resistance and mechanical strength, as well as good flame retardancy and solvent resistance. It is used for a purpose. However, in recent years, as the range of uses of such resins has expanded further, even higher heat resistance and mechanical strength are often required than in the past. Therefore, there is a strong demand for the development of resin materials with even better heat resistance and mechanical strength. [Object of the Invention] In response to this demand, the present invention aims to provide a resin composition containing a cyanoaryl ether polymer as a resin skeleton and having excellent heat resistance and mechanical strength. [Summary of the Invention] The resin composition of the present invention has the following formula (): (In the formula, Ar is

[expression] or

[Embodiments of the invention]

Example 1 (1) Production of cyanoaryl ether polymer In a separable flask with an internal volume of 1 equipped with a stirring device, a rectification device, and an argon gas blowing tube,
34.4 g (0.2 mol) of 2,6-dichlorobenzonitrile, 21.58 g (0.196 mol) of hydroquinone,
400 ml of sulfolane, 100 ml of toluene, and 30.4 g (0.22 mol) of potassium carbonate were charged, and the reaction was carried out with stirring at 160° C. for 1.5 hours and at 190° C. for 3.5 hours while blowing argon gas.
The water produced during the reaction was constantly distilled off along with the toluene. After the reaction is complete, the product is cooled to room temperature and poured into methanol, and the precipitated polymer is pulverized with a Warning blender, and then washed with 2 parts of hot water and 2 parts of methanol, to obtain the following formula () 41.4 g (yield: 100%) of a cyanoaryl ether polymer represented by the following formula was obtained. When this polymer was dissolved in p-chlorophenol to a concentration of 0.2 g/dl, the reduced viscosity [ηSP/C] was 1.46 dl/g at 60°C. (2) Production of resin composition Carbon fibers with a total length of 3 mm are blended as a fibrous reinforcing material into the cyanoaryl ether polymer powder obtained in (1) above so that the content thereof is 10% by weight, The mixture was melt-kneaded using an extruder at 400°C to form pellets. This pellet was injection molded to prepare a test piece. Next, this test piece was annealed at 200°C for 2 hours, and then thermal properties were measured and a tensile test [Shimadzu Corporation: Autograph IS
-5000 at a tensile speed of 1 mm/mm], and the tensile modulus, strength at break, and elongation at break were measured. The results are shown in Table 1. Examples 2 and 3 The carbon fiber content was 20% and 30% by weight, respectively.
A resin composition was produced in the same manner as in Example 1 above, except that the weight % was changed, and the same tests as in Example 1 were conducted on the obtained resin composition. The results are also listed in Table 1. Examples 4 to 6 Instead of carbon fiber as the fibrous reinforcement material, total length 3
mm glass fiber is used, and its content is
A resin composition was produced in the same manner as in Example 1, except that the amounts were 10, 20, and 30% by weight, and the same tests as in Example 1 were conducted on the resulting resin composition. The results are also listed in Table 1. Comparative Example 1 A test piece was prepared by adding no fibrous reinforcing material to the cyanoaryl ether polymer represented by the above formula (), and the same tests as in Example 1 were conducted on the test piece. The results are shown in Table 1.

[Table] Example 7 (1) Production of cyanoaryl ether polymer In a 500 ml separable flask similar to Example 1, 20.88 g of 2,6-difluorobenzonitrile was added.
(0.15 mol) and 27.9 g of 4,4'-biphenol
(0.15 mol), chlorobenzene 30ml, sulfolane
Pour 120ml, stir while blowing in argon gas, raise the temperature to 200℃, and add 21.15g of potassium carbonate.
(0.15 mol) was added. Then, 1 at 25℃
The reaction was carried out at 280°C for 0.5 hour. Water produced during this reaction was distilled off together with chlorobenzene. After the reaction is completed, the polymer is cooled and poured into methanol to recover, pulverized in a Warning blender, washed with 2 parts of hot water and 2 parts of methanol, respectively, to obtain a cyano compound represented by the following formula (V). 42.9 g (yield: 100%) of an aryl ether polymer was obtained. The reduced viscosity [ηSP/C] of a p-chlorophenol solution of this polymer at a concentration of 0.2 g/dl was 1.16 dl/g at 60°C. (2) Production of resin composition Carbon fiber similar to that used in Example 1 was added to the cyanoaryl ether polymer powder obtained in (1) above to a content of 10% by weight as a fibrous reinforcing material. % and melt-kneaded using an extruder at 400°C to form pellets. This pellet was injection molded to prepare a test piece, which was annealed at 200° C. for 2 hours, and then measured for thermal properties and subjected to a tensile test in the same manner as in Example 1. The results are shown in Table 2. Examples 8 and 9 Carbon fiber content was 20% and 30% by weight, respectively.
A resin composition was produced in the same manner as in Example 7 except that the weight % was used, and the same tests as in Example 7 were conducted on the obtained composition, and the results are shown in Table 2. Examples 10 to 12 The same procedure as above was carried out except that the same glass fiber as used in Example 4 was used instead of carbon fiber as the fibrous reinforcing material, and the content was 10, 20, and 30% by weight, respectively. A resin composition was produced in the same manner as in Example 7, and the same tests as in Example 7 were conducted on the resulting resin composition. The results are also listed in Table 2. Comparative Example 2 A test piece was prepared by adding no fibrous reinforcing material to the cyanoaryl ether polymer represented by the above formula (V), and the same test as in Example 7 was conducted on it. It is shown in Table 2.

〔Effect of the invention〕

As is clear from the above explanation, the resin composition of the present invention has improved heat resistance and mechanical strength compared to conventional compositions by blending an appropriate amount of fibrous reinforcing material with the cyanoaryl ether polymer. Therefore, it is useful in fields that require high heat resistance and mechanical strength, such as electronic and electrical equipment and various mechanical materials.

Claims (1)

[Claims] Primary formula (): (In the formula, Ar represents [Formula] or [Formula]) Consisting of the repeating unit shown by
It is characterized by consisting of a cyanoaryl ether-based crystalline polymer having a reduced viscosity [ηsp/c] of 0.3 dl/g or more at °C, and a fibrous reinforcing material dispersed in the polymer in an amount of 1 to 70% by weight. A resin composition. 2. The resin composition according to claim 1, wherein the fibrous reinforcing material is glass fiber or carbon fiber.