PURIFIED β-HYDROXY ETHOXYACETIC ACID SALT, METHOD FOR PRODUCING THE SAME, PURIFIED 2-p-DIOXANONE AND METHOD FOR PRODUCING THE SAME

Title:

PURIFIED β-HYDROXY ETHOXYACETIC ACID SALT, METHOD FOR PRODUCING THE SAME, PURIFIED 2-p-DIOXANONE AND METHOD FOR PRODUCING THE SAME

Document Type and Number:

Japanese Patent JP2001288180

Kind Code:

A

Abstract:

To provide purified 2-p-dioxanone (2) without repurification of purified β-hydroxyethoxyacetic acid salts (1) being precursor and to provided a poly-p- dioxanone not containing a carboxyl group at molecular, having a high- molecular weight and a narrow molecular weight distribution obtained by polymerization of purified 2-p-dioxanone.

[1] Purified β-hydroxyethoxyacetic acid salts having chemical formula (1) (n is 1-2; M is Na and/or Mg when n is 2 and M is Ca and/or Mg when n is 2) is characterized as a melt peak top temperature of 206.5°C measured by a differential scanning calorimetry (DSC). [2] Purified 2-p-dioxyanone having chemical formula (2) is obtained from purified β-hydroxyethoxyactic acid salts.

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Inventors:

NAKATANI SATORU
MATSUMOTO TAKUJI
NAKAHARA YOSHINORI
AKIEDA HIDEYUKI
ISHITOKU TAKESHI

Application Number:

JP2000098225A

Publication Date:

October 16, 2001

Filing Date:

March 31, 2000

Export Citation:

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Assignee:

MITSUI CHEMICALS INC
DAIWA KASEI KOGYO KK

International Classes:

C07C51/43; C07C51/47; C07C59/125; C07D319/12; (IPC1-7): C07D319/12; C07C51/43; C07C59/125

Domestic Patent References:

JPS6036785B2

1985-08-22

Foreign References:

US3631189A

1971-12-28

Attorney, Agent or Firm:

Shinichi Naemura (1 person outside)

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