JPS5730706A - Preparation of polyvinyl acetal - Google Patents
Preparation of polyvinyl acetalInfo
- Publication number
- JPS5730706A JPS5730706A JP10614280A JP10614280A JPS5730706A JP S5730706 A JPS5730706 A JP S5730706A JP 10614280 A JP10614280 A JP 10614280A JP 10614280 A JP10614280 A JP 10614280A JP S5730706 A JPS5730706 A JP S5730706A
- Authority
- JP
- Japan
- Prior art keywords
- pva
- polyvinyl acetal
- aqueous solution
- reaction system
- reaction
- 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
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
PURPOSE: To obtain the titled polymer, useful as a coating material, etc., and having good transparency and solubility industrially and advantageously, by reacting PVA with an aldehyde in the aqueous phase in the presence of an acidic catalyst, at a specific temperature, and further adding an aqueous solution of PVA to the reaction system during the time just before to just after the deposition of precipitates.
CONSTITUTION: In preparing polyvinyl acetal by condensing PVA with an aldehyde, e.g. n-butylaldehyde, in the aqueous phase in the presence of an acidic catalyst, e.g. hydrochloric acid, the condensing reaction is carried out in a reaction system at a temperature of 20°C or above, and an aqueous solution of PVA is added to the reaction system during the time just before to just after the deposition of polyvinyl acetal precipitates. Thus, the reaction is continued to give the aimed polymer. The concentration of the aqueous solution of PVA is 3W15wt%, and the amount of the solution is preferably 0.5W20wt% based on the total weight.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10614280A JPS6056723B2 (en) | 1980-07-31 | 1980-07-31 | Method for producing particulate polyvinyl butyral |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10614280A JPS6056723B2 (en) | 1980-07-31 | 1980-07-31 | Method for producing particulate polyvinyl butyral |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5730706A true JPS5730706A (en) | 1982-02-19 |
| JPS6056723B2 JPS6056723B2 (en) | 1985-12-11 |
Family
ID=14426106
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10614280A Expired JPS6056723B2 (en) | 1980-07-31 | 1980-07-31 | Method for producing particulate polyvinyl butyral |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6056723B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4751266A (en) * | 1984-08-10 | 1988-06-14 | Hoechst Aktiengesellschaft | Polyvinylbutyral of reduced tackiness and improved tensile strength |
| US5100957A (en) * | 1986-12-26 | 1992-03-31 | Tosoh Corporation | Protective dust cover for photomask or reticle |
| JP2010538132A (en) * | 2007-09-05 | 2010-12-09 | クラレイ ユーロップ ゲゼルシャフト ミット ベシュレンクテル ハフツング | Process for the production of polyvinyl acetal with low residual aldehyde content in wastewater |
-
1980
- 1980-07-31 JP JP10614280A patent/JPS6056723B2/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4751266A (en) * | 1984-08-10 | 1988-06-14 | Hoechst Aktiengesellschaft | Polyvinylbutyral of reduced tackiness and improved tensile strength |
| US5100957A (en) * | 1986-12-26 | 1992-03-31 | Tosoh Corporation | Protective dust cover for photomask or reticle |
| JP2010538132A (en) * | 2007-09-05 | 2010-12-09 | クラレイ ユーロップ ゲゼルシャフト ミット ベシュレンクテル ハフツング | Process for the production of polyvinyl acetal with low residual aldehyde content in wastewater |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6056723B2 (en) | 1985-12-11 |
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