Chloroprene polymer, chloroprene polymer composition, vulcanization molded body and roll

Patent metadata

Field	Value
Publication number	US-2024158555-A1
Application number	US-202218552801-A
Country	US
Kind code	A1
Filing date	Mar 7, 2022
Priority date	Apr 6, 2021
Publication date	May 16, 2024
Grant date	—

Abstract

A chloroprene polymer having a structural unit derived from chloroprene and a structural unit derived from an unsaturated nitrile, in which the chloroprene polymer has peak tops at 5.80 to 6.00 ppm and 5.10 to 5.30 ppm in a 1H-NMR spectrum as measured in a deuterochloroform solvent, in the 1H-NMR spectrum, a peak area ratio A/B of a peak area A at 5.80 to 6.00 ppm and a peak area B at 4.05 to 6.20 ppm is 0.9/100 to 1.1/100, and the peak area A, the peak area B, and a peak area C at 5.10 to 5.30 ppm satisfy formula “(C−2A)/B≤2.0/100”, and a content of the structural unit derived from an unsaturated nitrile is more than 0% by mass and 23% by mass or less.

First claim

1 . A chloroprene polymer comprising a structural unit derived from chloroprene and a structural unit derived from an unsaturated nitrile, wherein
the chloroprene polymer comprises peak tops at 5.80 to 6.00 ppm and 5.10 to 5.30 ppm in a 1H-NMR spectrum as measured in a deuterochloroform solvent, in the 1H-NMR spectrum, a peak area ratio A/B of a peak area A at 5.80 to 6.00 ppm and a peak area B at 4.05 to 6.20 ppm is 0.9/100 to 1.1/100, and the peak area A, the peak area B, and a peak area C at 5.10 to 5.30 ppm satisfy formula “(C−2A)/B 2.0/100”, and a content of the structural unit derived from an unsaturated nitrile is more than 0% by mass and 23% by mass or less.

2 . The chloroprene polymer according to claim 1 , wherein the chloroprene polymer further comprises a peak top at 4.13 to 4.23 ppm in the 1H-NMR spectrum, and
in the 1H-NMR spectrum, a peak area ratio D/B of a peak area D at 4.13 to 4.23 ppm and the peak area B is more than 0/100 and 0.05/100 or less.

3 . The chloroprene polymer according to claim 2 , wherein the peak area ratio D/B is 0.03/100 to 0.05/100.

4 . A chloroprene polymer composition comprising the chloroprene polymer according to claim 1 .

5 . A vulcanized molded article of the chloroprene polymer composition according to claim 4 .

6 . A roll comprising a vulcanized molded article of a chloroprene polymer composition, wherein
the chloroprene polymer composition comprises a chloroprene polymer, the chloroprene polymer comprises a structural unit derived from chloroprene and a structural unit derived from an unsaturated nitrile, the chloroprene polymer comprises peak tops at 5.80 to 6.00 ppm and 5.10 to 5.30 ppm in a 1H-NMR spectrum as measured in a deuterochloroform solvent, in the 1H-NMR spectrum, a peak area ratio A/B of a peak area A at 5.80 to 6.00 ppm and a peak area B at 4.05 to 6.20 ppm is 0.9/100 to 1.1/100, and the peak area A, the peak area B, and a peak area C at 5.10 to 5.30 ppm satisfy formula “(C−2A)/B≤2.0/100”, and a content of the structural unit derived from an unsaturated nitrile is more than 0% by mass and 23% by mass or less.

7 . The chloroprene polymer according to claim 1 , wherein the peak area A, the peak area B, and the peak area C satisfy formula “0.1/100≤(C−2A)/B≤2.0/100”.

8 . The chloroprene polymer according to claim 1 , wherein the peak area A, the peak area B, and the peak area C satisfy formula “0.8/100≤(C−2A)/B≤2.0/100”.

9 . The chloroprene polymer according to claim 1 , wherein the peak area A, the peak area B, and the peak area C satisfy formula “0.1/100≤(C−2A)/B≤1.2/100”.

10 . The roll according to claim 6 , wherein the peak area A, the peak area B, and the peak area C satisfy formula “0.1/100≤(C−2A)/B≤2.0/100”.

11 . The roll according to claim 6 , wherein the peak area A, the peak area B, and the peak area C satisfy formula “0.8/100≤(C−2A)/B≤2.0/100”.

12 . The roll according to claim 6 , wherein the peak area A, the peak area B, and the peak area C satisfy formula “0.1/100≤(C−2A)/B≤1.2/100”.

Assignees

• Denka Company Ltd

Inventors

• NISHINO Wataru
• Onuki Suguru
• ANDO Ryotaro

Classifications

• C08F236/18 Primary

  containing chlorine · CPC title

• F16C13/00 Primary

  Rolls, drums, discs, or the like (guide rollers in feeding webs B65H27/00; calender rolls, bearings therefor D21G1/02; rotary drums or rollers for heat-exchange or heat-transfer apparatus F28F5/02); Bearings or mountings therefor · CPC title

• F16C2208/00

  Plastics; Synthetic resins, e.g. rubbers · CPC title

• C08F220/44

  Acrylonitrile · CPC title