Polycarbonate resin

Details Polycarbonate resin Polycarbonate resin

2001-09-12

2003-06-10

Buttner, David J. (Department: 1712)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From silicon reactant having at least one...

C528S025000, C528S201000, C528S204000, C525S464000, C525S474000

Reexamination Certificate

active

06576735

ABSTRACT:

BACKGROUND OF THE INVENTION
1) Field on the Invention
The present invention relates to a polycarbonate resin with excellent molding. The polycarbonate resin is suitably applicable to uses such as medical instrument parts, table wares, cooking wares and uses such as optical recording media including optical discs, compact discs, laser discs, optical cards, MO discs and digital video discs, electrophotography, spectacle lenses, toys etc.
2) Prior Art
A polycarbonate resin (bisphenol A type polycarbonate resin) obtainable by reaction of 2,2-bis(4-hydroxyphenyl)propane with a carbonic acid ester-forming compound is excellent in transparency, heat resistance, mechanical properties and dimension stability and used widely as engineering plastics. Further, in recent years, polycarbonate resins having various bisphenol skeletons other than the bisphenol A type polycarbonate resins have been suggested and applied to binders for electrophotography, optical recording media such as optical discs, heat resistance films, polarizing films, table wares, cooking wares, etc. As the above-mentioned uses, prior polycarbonates with a fluorene skeleton (Japanese Patent Kokai Nos. 6-145317, 6-25398, 6-216078, 6-322094 and 8-134199) exhibited inferior molding since it had a rigid skeleton and prior polycarbonates with a polysiloxane skeleton (Japanese Patent Kokai No.3-79626 and Japanese Patent No.2662310) also did not exhibit sufficient molding. Thus, there was room of improvement of molding.
SUMMARY OF THE INVENTION
An object of the present invention is to provide a polycarbonate resin with excellent molding.
As a result of extensive studies to solve the above-mentioned prior art problems, the inventors have found that a polycarbonate resin obtained from a bisphenol compound having a specific fluorene structure and a bisphenol compound having a specific polysiloxane structure possesses good molding, and have accomplished the present invention.
That is, the present invention provides a polycarbonate resin obtained by reaction of a carbonic acid ester-forming compound with bisphenols consisting of 9,9-bis(4-hydroxy-3-methylphenyl)fluorene and a bisphenol compound(s) having a structure represented by the following general formula (A), an intrinsic viscosity of said polycarbonate resin being 0.2 to 2.0 dl/g;
wherein R
1
and R
2
are, each independently, hydrogen, fluorine, chlorine, bromine, iodine, an alkyl group having 1 to 5 carbon atoms, an aryl group having 6 to 12 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, an alkoxy group having 1 to 5 carbon atoms, an aralkyl having 7 to 17 carbon atoms, an alkyl group having 1 to 5 carbon atoms with a substituent(s) of an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, an alkoxy group having 1 to 5 carbon atoms, fluorine, chlorine, bromine or iodine, an aryl group having 6 to 12 carbon atoms with said same substituent(s), an alkenyl group having 2 to 5 carbon atoms with said same substituent(s), an alkoxy group having 1 to 5 carbon atoms with said same substituent(s) or an aralkyl having 7 to 17 carbon atoms with said same substituent(s); R
3
, R
4
, R
5
and R
6
are, each independently, an alkyl group having 1 to 5 carbon atoms, an aryl group having 6 to 12 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, an alkoxy group having 1 to 5 carbon atoms, an aralkyl having 7 to 17 carbon atoms, an alkyl group having 1 to 5 carbon atoms with a substituent(s) of an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, an alkoxy group having 1 to 5 carbon atoms, fluorine, chlorine, bromine or iodine, an aryl group having 6 to 12 carbon atoms with said same substituent(s), an alkenyl group having 2 to 5 carbon atoms with said same substituent(s), an alkoxy group having 1 to 5 carbon atoms with said same substituent(s) or an aralkyl having 7 to 17 carbon atoms with said same substituent(s); R
7
is an alkylene group having 1 to 6 carbon atoms, an alkylidene group having 1 to 6 carbon atoms or absent; X is —Si(R
8
)(R
9
)O—, —Si(R
10
)(R
11
)O—, a homopolymer of —Si(R
8
)(R
9
)O— or —Si(R
10
)(R
11
)O— having an average polymerization degree of more than 0 and 200 or below or a random copolymer of —Si(R
8
)(R
9
)O— and —Si(R
10
)(R
11
)O— having an average polymerization degree of more than 0 and 200 or below; R
8
, R
9
, R
10
and R
11
are, each independently, hydrogen, fluorine, chlorine, bromine, iodine, an alkyl group having 1 to 5 carbon atoms, an aryl group having 6 to 12 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, an alkoxy group having 1 to 5 carbon atoms, an aralkyl having 7 to 17 carbon atoms, an alkyl group having 1 to 5 carbon atoms with a substituent(s) of an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, an alkoxy group having 1 to 5 carbon atoms, fluorine, chlorine, bromine or iodine, an aryl group having 6 to 12 carbon atoms with said same substituent(s), an alkenyl group having 2 to 5 carbon atoms with said same substituent(s), an alkoxy group having 1 to 5 carbon atoms with said same substituent(s) or an aralkyl having 7 to 17 carbon atoms with said same substituent(s).
DETAILED DESCRIPTION OF THE INVENTION
That is, the present invention is a polycarbonate resin obtained by reacting a carbonic acid ester-forming compound with bisphenols consisting of 9,9-bis(4-hydroxy-3-methylphenyl)fluorene and a bisphenol compound(s) having a structure represented by the general formula (A), an intrinsic viscosity of said polycarbonate resin being 0.2 to 2.0 dl/g;
wherein R
1
and R
2
are, each independently, hydrogen, fluorine, chlorine, bromine, iodine, an alkyl group having 1 to 5 carbon atoms, an aryl group having 6 to 12 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, an alkoxy group having 1 to 5 carbon atoms, an aralkyl having 7 to 17 carbon atoms, an alkyl group having 1 to 5 carbon atoms with a substituent(s) of an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, an alkoxy group having 1 to 5 carbon atoms, fluorine, chlorine, bromine or iodine, an aryl group having 6 to 12 carbon atoms with said same substituent(s), an alkenyl group having 2 to 5 carbon atoms with said same substituent(s), an alkoxy group having 1 to 5 carbon atoms with said same substituent(s) or an aralkyl having 7 to 17 carbon atoms with said same substituent(s); R
3
, R
4
, R
5
and R
6
are, each independently, an alkyl group having 1 to 5 carbon atoms, an aryl group having 6 to 12 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, an alkoxy group having 1 to 5 carbon atoms, an aralkyl having 7 to 17 carbon atoms, an alkyl group having 1 to 5 carbon atoms with a substituent(s) of an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, an alkoxy group having 1 to 5 carbon atoms, fluorine, chlorine, bromine or iodine, an aryl group having 6 to 12 carbon atoms with said same substituent(s), an alkenyl group having 2 to 5 carbon atoms with said same substituent(s), an alkoxy group having 1 to 5 carbon atoms with said same substituent(s) or an aralkyl having 7 to 17 carbon atoms with said same substituent(s); R
7
is an alkylene group having 1 to 6 carbon atoms, an alkylidene group having 1 to 6 carbon atoms or absent; X is —Si(R
8
)(R
9
)O—, —Si(R
10
)(R
11
)O—, a homopolymer of —Si(R
8
)(R
9
)O— or —Si(R
10
)(R
11
)O— having an average polymerization degree of more than 0 and 200 or below or a random copolymer of —Si(R
8
)(R
9
)O— and —Si(R
10
)(R
11
)O— having an average polymerization degree of more than 0 and 200 or below R
8
, R
9
, R
10
and R
11
are, each independently, hydrogen, fluorine, chlorine, bromine, iodine, an alkyl group having 1 to 5 carbon atoms, an aryl group having 6 to 12 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, an alkoxy group having 1 to 5 carbon atoms, an aralkyl having 7 to 17 carbon atoms, an alkyl group having 1 to 5 carbon atoms with a substituent(s) of an alkyl group having 1 to 5 carbon atoms, an alkenyl grou

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