JPS57117521A - Preparation of stable polyacetal - Google Patents
Preparation of stable polyacetalInfo
- Publication number
- JPS57117521A JPS57117521A JP401381A JP401381A JPS57117521A JP S57117521 A JPS57117521 A JP S57117521A JP 401381 A JP401381 A JP 401381A JP 401381 A JP401381 A JP 401381A JP S57117521 A JPS57117521 A JP S57117521A
- Authority
- JP
- Japan
- Prior art keywords
- concentration
- polyacetal
- polyoxymethylene
- catalyst
- lewis acid
- 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
- Polyoxymethylene Polymers And Polymers With Carbon-To-Carbon Bonds (AREA)
Abstract
PURPOSE: To obtain a polyacetal having improved stability and mechanical properties in high yield, by reacting a polyoxymethylene with an alkylene oxide at a specific limit concentration or below in an organic medium in the presence of a Lewis acid.
CONSTITUTION: (A) A polyoxymethylene having a number-average molecular weight ≥10,000 is reacted with (B) an alkylene oxide, preferably ethylene oxide, kept at the limit concentration of the formula[M is the concentration of the component (B); Mc is the limit concentration; P is the concentration of the component (A)]or below in an organic medium in the presence of (C) a Lewis acid, preferably boron trifluoride dibutyl etherate, as a catalyst and the reaction is then completed by adding NaOH, etc. thereto to give the aimed polyacetal. Preferably, the catalyst (C) is used in a concentration range of 1×10-7W1× 10-1mole/l.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP401381A JPS57117521A (en) | 1981-01-13 | 1981-01-13 | Preparation of stable polyacetal |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP401381A JPS57117521A (en) | 1981-01-13 | 1981-01-13 | Preparation of stable polyacetal |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57117521A true JPS57117521A (en) | 1982-07-22 |
JPS6212927B2 JPS6212927B2 (en) | 1987-03-23 |
Family
ID=11573080
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP401381A Granted JPS57117521A (en) | 1981-01-13 | 1981-01-13 | Preparation of stable polyacetal |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57117521A (en) |
-
1981
- 1981-01-13 JP JP401381A patent/JPS57117521A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS6212927B2 (en) | 1987-03-23 |
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