JPS5589306A - Preparation of starch polyvinyl alcohol graet copolymer having reduced viscosity - Google Patents
Preparation of starch polyvinyl alcohol graet copolymer having reduced viscosityInfo
- Publication number
- JPS5589306A JPS5589306A JP16250378A JP16250378A JPS5589306A JP S5589306 A JPS5589306 A JP S5589306A JP 16250378 A JP16250378 A JP 16250378A JP 16250378 A JP16250378 A JP 16250378A JP S5589306 A JPS5589306 A JP S5589306A
- Authority
- JP
- Japan
- Prior art keywords
- starch
- copolymer
- polyvinyl alcohol
- graet
- preparation
- 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
Links
Landscapes
- Preparation Of Compounds By Using Micro-Organisms (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Paper (AREA)
Abstract
PURPOSE: To prepare a copolymer useful as a sizing agent for paper, etc. and having reduced molecular wight and viscosity, by treating a polyvinyl alcohol-grafted starch with an acid or an enzyme or by roasting the starch to effect mild hydrolyzation.
CONSTITUTION: A starch-vinyl ester graft copolymer is prepared by a conventional grafting method, e.g. addition of a catalyst such as a peroxide, etc. to an aqueous solution of a mixture of a vinyl ester (e.g. vinyl acetate, etc.) and starch (e.g. tapioca starch, etc.) followed by graft polymerization. The copolymer is saponified in an aqueous solution of a base, e.g. sodium hydroxide, etc., and thereafter moderately hydrolyzed by treating the product with an acid, e.g. hydrochloric acid, etc., or an enzyme, e.g. amylase, etc., or by roasting and dehydrating the product at about 150°C with an evaporator, to give the desired copolymer.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16250378A JPS5589306A (en) | 1978-12-26 | 1978-12-26 | Preparation of starch polyvinyl alcohol graet copolymer having reduced viscosity |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16250378A JPS5589306A (en) | 1978-12-26 | 1978-12-26 | Preparation of starch polyvinyl alcohol graet copolymer having reduced viscosity |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5589306A true JPS5589306A (en) | 1980-07-05 |
JPS6210242B2 JPS6210242B2 (en) | 1987-03-05 |
Family
ID=15755848
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16250378A Granted JPS5589306A (en) | 1978-12-26 | 1978-12-26 | Preparation of starch polyvinyl alcohol graet copolymer having reduced viscosity |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5589306A (en) |
-
1978
- 1978-12-26 JP JP16250378A patent/JPS5589306A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS6210242B2 (en) | 1987-03-05 |
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