Resin composition, stretched film, circularly polarizing plate, and image display device

Patent metadata

Field	Value
Publication number	US-9518150-B2
Application number	US-201514685982-A
Country	US
Kind code	B2
Filing date	Apr 14, 2015
Priority date	Oct 16, 2012
Publication date	Dec 13, 2016
Grant date	Dec 13, 2016

Abstract

The invention relates to a resin composition which comprises a polymer having a divalent oligofluorene as a repeating unit therein, wherein the divalent oligofluorene contains at least two fluorene units optionally having a substituent, and the 9-positioned carbon atoms of the fluorene units bond to each other via a direct bond or via an alkylene group optionally having a substituent, an arylene group optionally having a substituent, or an aralkylene group optionally having a substituent, and a ratio of a retardation measured at a wavelength of 450 nm (Re450) to a retardation measured at a wavelength of 550 nm (Re550) satisfies the following formula (2): Re450/Re550≦1.0.

First claim

The invention claimed is:

1. A resin composition, comprising a polymer having a divalent oligofluorene as a repeating unit, wherein:
the divalent oligofluorene contains at least two fluorene units optionally having a substituent;
9-positioned carbon atoms of the fluorene units bond to each other via a direct bond, via an alkylene group optionally having a substituent, via an arylene group optionally having a substituent, or via an aralkylene group optionally having a substituent; and
a ratio of a retardation measured at a wavelength of 450 nm (Re450) to a retardation measured at a wavelength of 550 nm (Re550) satisfies formula (2):
Re450/Re550<1.0  (2).

2. A resin composition, comprising a polymer having a divalent oligofluorene as a repeating unit, wherein:
the divalent oligofluorene contains at least two fluorene units optionally having a substituent;
9-positioned carbon atoms of the fluorene units bond to each other via a direct bond, via an alkylene group optionally having a substituent, via an arylene group optionally having a substituent, or via an aralkylene group optionally having a substituent;
a molar fraction of the divalent oligofluorene to the polymer is 1% or more; and
the resin composition has a positive refractive index anisotropy.

3. The resin composition according to claim 1 , wherein the polymer is a polycarbonate.

4. A resin composition, comprising a polycarbonate polymer having a divalent oligofluorene as a repeating unit, wherein:
the divalent oligofluorene contains at least two fluorene units optionally having a substituent; and
9-positioned carbon atoms of the fluorene units bond to each other via a direct bond, via an alkylene group optionally having a substituent, via an arylene group optionally having a substituent, or via an aralkylene group optionally having a substituent.

5. The resin composition according to claim 2 or 4 , wherein a ratio of a retardation measured at a wavelength of 450 nm (Re450) to a retardation measured at a wavelength of 550 nm (Re550) satisfies formula (2):
Re450/Re550≦1.0  (2).

6. The resin composition according to any one of claims 1 , 2 and 4 , wherein the divalent oligofluorene is represented by formula (1):

wherein:
R 1 and R 2 each independently represent a direct bond, an optionally-substituted alkylene group having from 1 to 10 carbon atoms, an optionally-substituted arylene group having from 4 to 10 carbon atoms, an optionally-substituted aralkylene group having from 6 to 10 carbon atoms, or a group formed by bonding at least two groups selected from the group consisting of an optionally-substituted alkylene group having from 1 to 10 carbon atoms, an optionally-substituted arylene group having from 4 to 10 carbon atoms, and an optionally-substituted aralkylene group having from 6 to 10 carbon atoms, via an oxygen atom, an optionally-substituted sulfur atom, an optionally-substituted nitrogen atom, or a carbonyl group;
R 3 represents a direct bond, an optionally-substituted alkylene group having from 1 to 10 carbon atoms, an optionally-substituted arylene group having from 4 to 10 carbon atoms, or an optionally-substituted aralkylene group having from 6 to 10 carbon atoms;
R 4 to R 9 each independently represent a hydrogen atom, an optionally-substituted alkyl group having from 1 to 10 carbon atoms, an optionally-substituted awl group having from 4 to 10 carbon atoms, an optionally-substituted acyl group having from 1 to 10 carbon atoms, an optionally-substituted alkoxy group having from 1 to 10 carbon atoms, an optionally-substituted aryloxy group having from 1 to 10 carbon atoms, an optionally-substituted amino group, a substituent-having sulfur atom, a halogen atom, a nitro group, or a cyano group;
at least two adjacent groups of R 4 to R 9 may bond to each other to form a ring; and
n is an integer of from 1 to 5.

7. The resin composition according to any one of claims 1 , 2 and 4 , wherein the polymer further contains a divalent organic group represented by formula (3) as a repeating unit:

wherein R 10 represents an optionally-substituted alkylene group having from 2 to 20 carbon atoms, an optionally-substituted arylene group having from 4 to 20 carbon atoms, an optionally-substituted aralkylene group having from 6 to 20 carbon atoms, an optionally-substituted alkylene-ether group having from 2 to 100 carbon atoms, an optionally-substituted organic group having an alicyclic structure of from 4 to 20 carbon atoms, or an optionally-substituted organic group having heterocyclic structure of from 4 to 20 carbon atoms.

8. The resin composition according to claim 7 , wherein the divalent organic group represented by formula (3) is represented by at least one of formulae (4) to (9):

where R 11 represents an optionally-substituted linear alkylene group having from 0 to 18 carbon atoms;

where R 12 represents an optionally-substituted cycloalkylene group having from 4 to 20 carbon atoms;

where R 13 represents an optionally-substituted alkylene group having from 2 to 10 carbon atoms, and p indicates an integer of from 1 to 40;

where R 14 represents an optionally-substituted alkylene group having from 2 to 10 carbon atoms, and R 15 represents an optionally-substituted arylene group having from 12 to 30 carbon atoms; and

where R 16 represents an optionally-substituted group having an acetal ring of from 2 to 20 carbon atoms.

9. The resin composition according to any one of claims 1 , 2 and 4 , wherein a glass transition temperature of the composition is 90° C. or higher and 170° C. or lower.

10. The resin composition according to any one of claims 1 , 2 and 4 , wherein a melt viscosity of the composition at a measurement temperature of 240° C. and at a shear rate of 91.2 sec −1 is 500 Pa·s or more and 5000 Pa·s or less.

11. The resin composition according to any one of claims 1 , 2 and 4 , wherein a photoelastic coefficient of the composition is 45×10 −12 Pa −1 or less.

12. The resin composition according to any one of claims 1 , 2 and 4 , wherein a molar fraction of the divalent oligofluorene to the polymer is 1% or more and less than 50%.

13. The resin composition according to any one of claims 1 , 2 and 4 , wherein the polymer is produced through melt polycondensation of a dihydroxy compound represented by formula (10a) and a diester carbonate represented formula (11):

where:
R 1 and R 2 each independently represent a direct bond, an optionally-substituted alkylene group having from 1 to 10 carbon atoms, an optionally-substituted arylene group having from 4 to 10 carbon atoms, an optionally-substituted aralkylene group having from 6 to 10 carbon atoms, or a group formed by bonding at least two groups selected from th

Assignees

• Mitsubishi Chem Corp

Inventors

• Uehara Hisatoshi
• Hayashi Hiroyuki
• Sumitani Naoko
• Kusaka Haruhiko
• Namiki Shingo
• Hirami Yuuichi

Classifications

• C08J2369/00

  Characterised by the use of polycarbonates; Derivatives of polycarbonates · CPC title

• C07C205/19

  having nitro groups bound to carbon atoms of six-membered aromatic rings and hydroxy groups bound to acyclic carbon atoms · CPC title

• C08J5/18

  Manufacture of films or sheets · CPC title

• C07C2603/18

  Fluorenes; Hydrogenated fluorenes · CPC title

• C07C211/31

  the six-membered aromatic ring being part of a condensed ring system formed by at least three rings · CPC title