JPS608356A - Resin composition - Google Patents

Abstract

PURPOSE:To obtain a composition having excellent impact resistance, high heat-resistance and flame-retardance, etc., and improved moldability, by compounding specific two kinds of polycarbonates. CONSTITUTION:The objective composition is obtained by compounding (A) 1-99pts.wt. of 1,1-bis(4-hydroxyphenyl)-1-phenylethane carbonate and (B) 99- 1pts.wt. of 2,2-bis(4-hydroxyphenyl)propane carbonate. The defects of the component A such as poor moldability and low impact resistance, etc. can be improved, and the resultant composition has higher heat-resistance and flame-retardance than the component A.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to 1,1-bis-(4-hydroxyphenyl)-
Polycarbonate from 1-phenyl-ethane (hereinafter i
''c-1) is blended with polycarbonate made from 2,2-bis-(4-hydroxyphenyl)-propane (hereinafter abbreviated as P'C-2).
The present invention relates to a novel resin composition having improved processability and physical properties compared to PC-1 or PC-2 itself.

The present inventors found that PC-1 has a higher heat distortion temperature than PC-2.
Although it is a resin with excellent flame retardancy and tensile strength, it was discovered that it had drawbacks such as poor moldability and poor impact resistance, and after intensive consideration of improvements to PC-t,
By blending PC-2 with PC-1, the processability of PC-1 is improved, resulting in an excellent resin composition with high impact resistance and higher heat resistance and flame retardancy than PC-1. The present invention was achieved by discovering that a product can be obtained.

That is, in the present invention, PC-299 to PC-11 to 99 parts by weight are added to PC-11 to 99 parts by weight.
This is a resin composition containing 1 part by weight.

The composition of the present invention shares most of the advantages of PC-1 and PC-2, has improved processability, and has properties superior to each product alone.

The blending of PC-1 and PC-2 is 1 to 99 parts by weight of PC-1 and 99-1 parts by weight of PC-2, but preferably Pc
-1 is 5 to 96 parts by weight, and Pa-2 is 95-5 parts by weight.

PC-1 used in the present invention is obtained from 1,1-bis-(4-hydroxyphenyl-ethane and diallyl carbonate or phosgene).

PC-2 is 2,2-bis-(4-hydroxyphenyl)
- Obtained from propane and diallyl carbonate or phosgene. Polymerization methods include bulk polycondensation and interfacial main condensation.
Any method can be used.

PC-1 may be co-condensed with other bisphenols as long as it has the characteristics of PC-1. Minor parts of bisphenols, such as resorcinol, hydroquinone, 2.2
-bis-(4-hydroxyphenyl)propane and its brominated derivatives, his-(4-hydroxyphenyl)sulsington, diphenols, and the like. PC3-2 is also P
A small amount of other bisphenols may be co-condensed as long as it has the characteristics of C2. Specific examples include brominated derivatives of 2,2-bis(4-hydroxyphenyl)propane.

In producing each of the compositions of the present invention, commonly used mixing methods can be used.

For example, after mixing powders or granules of PC-1 and PC-2 in a mixer such as a super shiba mixer, a Henschel mixer, or a tumbler,
They may be mixed in a molten state using a mixed wire roll or the like, or a solution blending method may be used.

The composition of the present invention may contain additives that are added to plastics, such as dyes, pigments, fillers, photostabilizers, antistatic agents, etc., to the extent that they do not impair the properties of the composition. Furthermore, the mechanical strength can be increased by adding glass fiber to the extent that the characteristics of the composition of the present invention can be utilized.

The composition of the present invention can be used as engineering plastics such as mechanical parts, electrical parts, automobile parts, various containers, and packaging materials in the form of sheets, films, and other molded products by methods such as press molding, injection molding, and extrusion molding. As is clear from Table 1, which requires performance, the isot impact strength and processability (flow temperature) of PC-1 are higher than that of PC-2.
It is improved by adding.

Also, from the viewpoint of PC-2, the addition of PC-1 improves the tensile strength and heat distortion temperature without decreasing the Izot impact strength.

Example 2 170 parts of PC-2 and 280 parts of PC-2 used in Example 1 were triblended, dried with hot air at 120°C for 8 hours, and granulated at 800°C using a twin-screw presser. Injection molding was performed using a Sumitomo Nestal injection molding machine (Neomat 47/28), injection pressure 1600 Kf/'', injection speed 12 (gauge value),
The test was carried out at a cylinder temperature of 880°C.

The impact resistance of this item is l9K with the isotto notch.
It was gcx/arm.

The flammability was ranked ■-0. Note that PC・-2 alone was v-2.

Claims (1)

[Claims] 1.1-bis-(4-hydroxyphenyl)-1-phenyl-ethane to 1-99 it parts of polycarbonate from 2.2-bis-(4-hydroxyphenyl)-propane from 99 to 1 heavy parts A resin composition made by blending.