JPS54118491A - Preparation of high polymeric material having water absorption - Google Patents

Preparation of high polymeric material having water absorption

Info

Publication number
JPS54118491A
JPS54118491A JP2712078A JP2712078A JPS54118491A JP S54118491 A JPS54118491 A JP S54118491A JP 2712078 A JP2712078 A JP 2712078A JP 2712078 A JP2712078 A JP 2712078A JP S54118491 A JPS54118491 A JP S54118491A
Authority
JP
Japan
Prior art keywords
polymeric material
polyvinyl alcohol
water absorption
high polymeric
carboxyl groups
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
JP2712078A
Other languages
Japanese (ja)
Other versions
JPS6142721B2 (en
Inventor
Toshihiko Yoshitake
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.)
Kuraray Co Ltd
Original Assignee
Kuraray 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 Kuraray Co Ltd filed Critical Kuraray Co Ltd
Priority to JP2712078A priority Critical patent/JPS54118491A/en
Publication of JPS54118491A publication Critical patent/JPS54118491A/en
Publication of JPS6142721B2 publication Critical patent/JPS6142721B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)

Abstract

PURPOSE: To prepare a high polymeric material having high water absorption, by heat-treating a modified polyvinyl alcohol having soluble carboxyl groups.
CONSTITUTION: Polyvinyl alcohol having a polymerization degree of 100W5,000 and a saponification degree of 50W100 mol % is reacted with a cyclic acid anhydride, e.g. maleic or phthalic anhydride, in an anhydrous state at 30W150°C for 30 min W 10 hr tp gove a modified polyvinyl alcohol having soluble carboxyl groups, which is then dried and heat-treated at 80W250°C, preferably 100W200°C, for 1secW2hr, preferably 1 minW1 hr to give a crosslinking density of about one bond per high polymer molecule.
EFFECT: According to the method, a high polymeric material capable of adsorbing water in an amount of 50W500 times its own weight even in a short time of 1W 10 min can be obtained.
COPYRIGHT: (C)1979,JPO&Japio
JP2712078A 1978-03-07 1978-03-07 Preparation of high polymeric material having water absorption Granted JPS54118491A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2712078A JPS54118491A (en) 1978-03-07 1978-03-07 Preparation of high polymeric material having water absorption

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2712078A JPS54118491A (en) 1978-03-07 1978-03-07 Preparation of high polymeric material having water absorption

Publications (2)

Publication Number Publication Date
JPS54118491A true JPS54118491A (en) 1979-09-13
JPS6142721B2 JPS6142721B2 (en) 1986-09-24

Family

ID=12212192

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2712078A Granted JPS54118491A (en) 1978-03-07 1978-03-07 Preparation of high polymeric material having water absorption

Country Status (1)

Country Link
JP (1) JPS54118491A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56155203A (en) * 1980-04-30 1981-12-01 Kuraray Co Ltd Production of carboxyl group-containing polymer material

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56155203A (en) * 1980-04-30 1981-12-01 Kuraray Co Ltd Production of carboxyl group-containing polymer material

Also Published As

Publication number Publication date
JPS6142721B2 (en) 1986-09-24

Similar Documents

Publication Publication Date Title
JPS5675451A (en) Method for treating composition containing carboxylic acid
JPS5265597A (en) Preparation of high polimeric materials with improved water absorption
JPS5223001A (en) Process for elimination of formyl group
ATE86262T1 (en) PROCESS FOR THE PREPARATION OF COPOLYMERISATS FROM ETHYLENICALLY UNSATURATED DICARBONIC ACID ANHYDRIDES AND ALKYLVINYL ETHERS.
JPS5340760A (en) Preparation of unsaturated imide esters
JPS56155203A (en) Production of carboxyl group-containing polymer material
JPS54118491A (en) Preparation of high polymeric material having water absorption
JPS57128711A (en) Resin solution for magnetic coating material
JPS5227455A (en) Process for preparing a high polymer material having water absorption properties
JPS5437188A (en) Preparation of water-absorbing resin
JPS56139580A (en) Modified polyvinyl alcohol soil conditioner
JPS54118490A (en) Preparation of modified polyvinyl alcohol
JPS5616524A (en) Purification of crude polytetramethylene glycol
GB2137637B (en) Polymers containing anhydride groups
JPS5512156A (en) Copolymerization of epoxy compound with carbon dioxide
JPS5565223A (en) Production of polyester
JPS5560523A (en) Preparation of unsaturated polyester
JPS5411994A (en) Preparation of polymer ic material having excellent water absorption properties
JPS5382666A (en) Preparation for hydrogel having high water absorbing property
JPS52107096A (en) Preparation of water absorbing high polymer materials
JPS52147696A (en) Preparation of unsaturated polyester resin from waste liquor containing maleic acid
JPS5296694A (en) Addition of acid anhydride group to polymer
JPS5391090A (en) Concentrating or drying method
JPS56109277A (en) Heat medium
JPS5781405A (en) Material for dental use