TW374774B - Process for preparing polyacetal copolymer - Google Patents
Process for preparing polyacetal copolymerInfo
- Publication number
- TW374774B TW374774B TW085108339A TW85108339A TW374774B TW 374774 B TW374774 B TW 374774B TW 085108339 A TW085108339 A TW 085108339A TW 85108339 A TW85108339 A TW 85108339A TW 374774 B TW374774 B TW 374774B
- Authority
- TW
- Taiwan
- Prior art keywords
- copolymerization
- polyacetal copolymer
- principal monomer
- prepolymerization mixture
- comonomer
- Prior art date
Links
Landscapes
- Polyoxymethylene Polymers And Polymers With Carbon-To-Carbon Bonds (AREA)
Abstract
A process for preparing a polyacetal copolymer by copolymerization of trioxane a principal monomer with a cyclic ether or cyclic formal having at least one carbon-carbon bond as a comonomer, comprising the steps of: (a) forming a liquid prepolymerization mixture comprised of at least a part of the entirety of said comonomer with between 0.05 to 100 ppm, based on the total weight of the monomers, of a heteropoly-acid polymerization catalyst or an acid salt thereof according to the following formula: Hx[MmMnO1]yH2O, wherein M represents an element selected from the group consisting of P and Si; M1 represents a coordinating element selected from W, Mo or V; 1 is 10 to 100; m is 1 to 10; n is 6 to 40; x is an integer of at least 1; and y is 0 to 50; (b) introducing the prepolymerization mixture with the principal monomer; and thereafter (c) conducting copolymerization of the prepolymerization mixture and the principal monomer under polyacetal copolymerization conditions. According to such the process, the polymerization yield and the degree of polymerization (molecular weight) are enhanced, and a polyacetal copolymer having an improved stability can be obtained.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17722595 | 1995-07-13 | ||
| JP15219896A JP2958270B2 (en) | 1995-07-13 | 1996-06-13 | Method for producing polyacetal copolymer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| TW374774B true TW374774B (en) | 1999-11-21 |
Family
ID=26481182
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| TW085108339A TW374774B (en) | 1995-07-13 | 1996-07-10 | Process for preparing polyacetal copolymer |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP2958270B2 (en) |
| MY (1) | MY113921A (en) |
| TW (1) | TW374774B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3037612B2 (en) * | 1996-04-12 | 2000-04-24 | ポリプラスチックス株式会社 | Method for producing polyacetal copolymer |
-
1996
- 1996-06-13 JP JP15219896A patent/JP2958270B2/en not_active Expired - Lifetime
- 1996-07-10 TW TW085108339A patent/TW374774B/en not_active IP Right Cessation
- 1996-07-12 MY MYPI96002892A patent/MY113921A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0987348A (en) | 1997-03-31 |
| MY113921A (en) | 2002-06-29 |
| JP2958270B2 (en) | 1999-10-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MK4A | Expiration of patent term of an invention patent |