US 2024/0368345 A1 · AROMATIC POLYCARBONATE, AROMATIC POLYCARBONATE PRODUCTION METHOD, AND CONTAINER

Abstract

Provided is an aromatic polycarbonate wherein indicators of change in elongational viscosity measured at an elongation rate of 0.005 sec−1 for a specimen 127 mm long, 12.7 mm wide, and 0.8 mm thick under a condition of 280° C. satisfy conditions (i) and (ii), and MFR at 300° C. under a load of 1.2 kg is 1.5 to 4.5 (g/10 min): <condition (i)> an indicator of change in elongational viscosity of the following formula (1): ( log 10 ( Elongational ⁢ viscosity [ Pa · s ] ⁢ at 0.8 seconds ) - log 10 ( Elongational ⁢ viscosity [ Pa · s ] ⁢ at 0.3 seconds ) ) ⁠ / ( log 10 0.8 - log 10 0.3 ) formula ⁢ ( 1 ) in interval A (interval from 0.30 to 0.80 seconds after the start of elongation) is 0.10 to 0.30; and <condition (ii)> an indicator of change in elongational viscosity of the following formula (2): ( log 10 ( Elongational ⁢ viscosity [ Pa · s ] ⁢ at 8. seconds ) - log 10 ( Elongational ⁢ viscosity [ Pa · s ] ⁢ at 3. seconds ) ) ⁠ / ( log 10 8. - log 10 3. ) formula ⁢ ( 2 ) in interval B (interval from 3.0 to 8.0 seconds after the start of elongation) is 0.70 to 1.1.

Claims21

Dependent claims

An aromatic polycarbonate wherein

indicators of change in elongational viscosity measured at an elongation rate of 0.005 sec− for a specimen 127 mm long, 12.7 mm wide, and 0.8 mm thick under a temperature condition of 280° C. satisfy the following <condition (i)> and <condition (ii)>, and
MFR measured at a temperature of 300° C. under a load of 1.2 kg is 1.5 to 4.5 (g/10 min):
<condition (i)>
a value of an indicator of change in elongational viscosity represented by the following formula (1):
(
log
10
(
Elongational
⁢
viscosity
[
Pa
·
s
]
⁢
at
0.8
seconds
)
-
log
10
(
Elongational
⁢
viscosity
[
Pa
·
s
]
⁢
at
0.3
seconds
)
)
/
(
log
10
0.8
-
log
10
0.3
)
formula
⁢
(
1
)
in interval A (interval from 0.30 seconds to 0.80 seconds after the start of elongation) is 0.10 to 0.30;
and
<condition (ii)>
a value of an indicator of change in elongational viscosity represented by the following formula (2):
(
log
10
(
Elongational
⁢
viscosity
[
Pa
·
s
]
⁢
at
8.
seconds
)
-
log
10
(
Elongational
⁢
viscosity
[
Pa
·
s
]
⁢
at
3.
seconds
)
)
/
(
log
10
8.
-
log
10
3.
)
formula
⁢
(
2
)
in interval B (interval from 3.0 seconds to 8.0 seconds after the start of elongation) is 0.70 to 1.1.

106 more elements

Dependencies are inferred from the claim text.

Aromatic polycarbonate, aromatic polycarbonate production method, and container

Life of this patent

Aromatic polycarbonate, aromatic polycarbonate production method, and container

Life of this patent

Abstract

Claims21