Aromatic polysulfone

Patent metadata

Field	Value
Publication number	US-10400069-B2
Application number	US-201615556703-A
Country	US
Kind code	B2
Filing date	Mar 15, 2016
Priority date	Mar 17, 2015
Publication date	Sep 3, 2019
Grant date	Sep 3, 2019

Abstract

An aromatic polysulfone produced by polymerizing a dihalogeno compound represented by general formula (A) shown below, and a dihydric phenol represented by general formula (B) shown below, the aromatic polysulfone having a value (Mw/Mn) for the ratio between the weight average molecular weight (Mw) and the number average molecular weight (Mn) of less than 1.8, and having a number average molecular weight (Mn) of at least 6,000 but less than 14,000.

(In the formula, each of X and X′ independently represents a halogen atom; each of R 1 , R 2 , R 3 and R 4 independently represents an alkyl group having a carbon number of 1 to 4 or an alkoxy group having a carbon number of 1 to 4; each of n 1 , n 2 , n 3 and n 4 independently represents an integer of 0 to 4; and when n 1 , n 2 , n 3 or n 4 is an integer of 2 to 4, the plurality of R 1 , R 2 , R 3 or R 4 groups may be the same as, or different from, each other).

First claim

The invention claimed is:

1. An aromatic polysulfone produced by polymerizing a dihalogeno compound represented by general formula (A) shown below, and a dihydric phenol represented by general formula (B) shown below, the aromatic polysulfone having:
a value (Mw/Mn) for a ratio between a weight average molecular weight (Mw) and a number average molecular weight (Mn) of less than 1.8,
a number average molecular weight (Mn) of at least 6,000 but less than 14,000, and
a reduction viscosity of at least 0.22 to 0.36 dL/g:

wherein each of X and X′ independently represents a halogen atom; each of R 1 , R 2 , R 3 and R 4 independently represents an alkyl group having a carbon number of 1 to 4 or an alkoxy group having a carbon number of 1 to 4; each of n 1 , n 2 , n 3 and n 4 independently represents an integer of 0 to 4; and when n 1 , n 2 , n 3 or n 4 is an integer of 2 to 4, a plurality of R 1 , R 2 , R 3 or R 4 groups may be the same as, or different from, each other.

2. The aromatic polysulfone according to claim 1 , wherein a 5% weight reduction temperature of the aromatic polysulfone is at least 498° C.

3. The aromatic polysulfone according to claim 1 , wherein the dihalogeno compound is bis(4-chlorophenyl)sulfone and the dihydric phenol is bis(4-hydroxyphenyl)sulfone.

4. The aromatic polysulfone according to claim 1 , wherein the number average molecular weight (Mn) is 7,000 to 12,000.

5. The aromatic polysulfone according to claim 2 , wherein the 5% weight reduction temperature of the aromatic polysulfone is at least 498° C. but not more than 530° C.

6. The aromatic polysulfone according to claim 1 , wherein the value (Mw/Mn) for a ratio between a weight average molecular weight (Mw) and a number average molecular weight (Mn) is 1.5 to 1.79.

Assignees

• Sumitomo Chemical Co

Inventors

• Ohtomo Shinji
• Matsubara Masanobu

Classifications

• C08G75/23 Primary

  Polyethersulfones · CPC title

• C08G65/40 Primary

  from phenols (I) and other compounds (II), e.g. OH-Ar-OH + X-Ar-X, where X is halogen atom, i.e. leaving group · CPC title

• C08G75/205 Primary

  Copolymers of sulfur dioxide with unsaturated organic compounds · CPC title

• G01N2030/486

  Physics · mapped topic

• B01J20/291

  Gel sorbents · CPC title