JPS54137092A - Preparation of hydrophilic crosslinked polymer - Google Patents

Preparation of hydrophilic crosslinked polymer

Info

Publication number
JPS54137092A
JPS54137092A JP4797478A JP4797478A JPS54137092A JP S54137092 A JPS54137092 A JP S54137092A JP 4797478 A JP4797478 A JP 4797478A JP 4797478 A JP4797478 A JP 4797478A JP S54137092 A JPS54137092 A JP S54137092A
Authority
JP
Japan
Prior art keywords
polymer
solution
alkali
waste
crosslinked polymer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP4797478A
Other languages
Japanese (ja)
Other versions
JPS5519921B2 (en
Inventor
Koji Tanaka
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Japan Exlan Co Ltd
Original Assignee
Japan Exlan Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Japan Exlan Co Ltd filed Critical Japan Exlan Co Ltd
Priority to JP4797478A priority Critical patent/JPS54137092A/en
Publication of JPS54137092A publication Critical patent/JPS54137092A/en
Publication of JPS5519921B2 publication Critical patent/JPS5519921B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Eyeglasses (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)

Abstract

PURPOSE: To prepare a crosslinked polymer having excellent swellability with water, in one process even at a low concentration of alkali solution, by contacting an acrylonitrile polymer with the aqueous alkali solution containing a specific amount of an electrolytic salt.
CONSTITUTION: An acrylonitrile (AN) polymer is contacted with an aqueous solution of an alkali metal hydroxide (pref. 0.25W6 mol/1,000g solution) containing an electrolytic salt (e.g. sodium nitrate, etc.) (≥0.5 mol/1,000g solution) in the heterogeneous system. The AN polymer is hydrolyzed to the desired hydrosol by the treatment.
EFFECT: Since the alkali concentration is low, there is little harm and danger in the process. An industrial waste, e.g. fibrous waste, polymer waste, etc., can be used as the AN polymer.
USE: Soft contact lenses, sanitary materials, etc..
COPYRIGHT: (C)1979,JPO&Japio
JP4797478A 1978-04-17 1978-04-17 Preparation of hydrophilic crosslinked polymer Granted JPS54137092A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4797478A JPS54137092A (en) 1978-04-17 1978-04-17 Preparation of hydrophilic crosslinked polymer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4797478A JPS54137092A (en) 1978-04-17 1978-04-17 Preparation of hydrophilic crosslinked polymer

Publications (2)

Publication Number Publication Date
JPS54137092A true JPS54137092A (en) 1979-10-24
JPS5519921B2 JPS5519921B2 (en) 1980-05-29

Family

ID=12790278

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4797478A Granted JPS54137092A (en) 1978-04-17 1978-04-17 Preparation of hydrophilic crosslinked polymer

Country Status (1)

Country Link
JP (1) JPS54137092A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61185508A (en) * 1985-02-12 1986-08-19 Nippon Shokuhin Kako Kk Highly water-absorbing material

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60138319A (en) * 1983-12-26 1985-07-23 Matsushita Electric Ind Co Ltd Burner

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61185508A (en) * 1985-02-12 1986-08-19 Nippon Shokuhin Kako Kk Highly water-absorbing material

Also Published As

Publication number Publication date
JPS5519921B2 (en) 1980-05-29

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