Polycarbonate polymer from tetra arylene triphenol

• US 4,894,432 A
• Filed: 08/03/1988
• Issued: 01/16/1990
• Est. Priority Date: 10/08/1985
• Status: Expired due to Term

• Current Assignee: Mitsui Chemicals Incorporated (Mitsui Chemicals)
• Original Assignee: Mitsui Petrochemical Industries, Ltd.
• Inventors: Jujo, Yozo, Mizuno, Kenichi, Oyoshi, Hajime
• Primary Examiner(s): ANDERSON, HAROLD
• Application Number:
  US07/227,773
• Time in Patent Office: 531 Days
• Field of Search: 528/204, 528/196
• US Class Current: 528/204
• CPC Class Codes: C07C 39/15 with all hydroxy groups on non-condensed rings , e.g. phenylphenol
• CPC Class Codes: C07C 43/23 containing hydroxy or O-metal groups

Abstract

A triphenol type compound represented by the following formula: ##STR1## wherein R₁, R₂, R₃, R₄, R₅ and R₆ independently represent hydrogen, a halogen, a C₁ -C₅ alkyl group or a C₁ -C₅ alkoxy group.

The triphenol type compound can be used, as a branching agent, for the production of a polycarbonate comprising (A) a carbonic acid component unit, (B) a divalent phenol component unit, and (C) a triphenol type compound component unit derived from the above-mentioned triphenol type compound. The triphenol type compound unit (C) is used in an amount of 0.01 to 10 mole %, based on the divalent phenol component unit (B) and the intrinsic viscosity [η], determined at 25° C. in methylene chloride, of the polycarbonate is 0.4 to 1.0 dl/g and the glass transition temperature (Tg), determined by a differential scanning type calorimeter is 150° C. to 300° C.

Claims

1. A polycarbonate comprising (A) a carbonic acid component unit, (B) a divalent phenol component unit, and (c) a triphenol compound component unit derived from the triphenol compound having the formula (I):

##STR13## wherein R₁, R₂, R₃, R₄, R₅, and R₆, independently, represent hydrogen, a halogen, a C₁ -C₅ alkyl group or a C₁ -C₅ alkoxy group, the amount of the triphenol compound unit (C) being 0.01 to 10 mol%, based on the divalent phenol component (b) and the intrinsic viscosity, determined at 25°

C. in methylene chloride, of the polycarbonate being 0.4 to 1.0 dl/g and the glass transition temperature (Tg), determined by a differential scanning calorimeter, being 150°

C. to 300°

C.

2. A polycarbonate as claimed in claim 1, wherein the triphenol compound is 1-[α

-methyl-α

-(4'"'"'-hydroxyphenyl)ethyl]-4-[α

'"'"',α

'"'"'-bis(4"-hydroxyphenyl)ethyl]benzene.

3. A polycarbonate as claimed in claim 1, wherein the triphenol compound is 1-[α

-methyl-α

-(4'"'"'-hydroxyphenol)ethyl]-3-[α

'"'"',α

'"'"'-bis(4"-hydroxyphenyl)ethyl]benzene.

4. A polycarbonate as claimed in claim 1, wherein the triphenol compound is 1-[α

-methyl-α

-(3'"'"'-methyl-4'"'"'-hydroxyphenyl)ethyl]-4-[α

'"'"',.alpha.'"'"'-bis(3"-methyl-4"-hydroxyphenyl)ethyl]benzene.

5. A polycarbonate as claimed in claim 1, wherein the triphenol compound is 1-[α

-methyl-α

-(3'"'"',5'"'"'-dimethyl-4'"'"'-hydroxyphenyl)ethyl]-4-[.alpha.'"'"',α

'"'"'-bis(3",5"-dimethyl-4"-hydroxyphenyl)ethyl]benzene.

6. A process for producing the polycarbonate of claim 1 comprising reacting a divalent phenol, a carbonic acid derivative, and the triphenol compound of Formula (I).