Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From aldehyde or derivative thereof as reactant
Patent
1998-08-10
2000-03-14
Moore, Margaret G.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From aldehyde or derivative thereof as reactant
528249, C08G 210
Patent
active
06037439&
ABSTRACT:
To provide a process for stable and continuous production of a polyacetal resin, mainly comprising a copolymer of 1,3-dioxolane and trioxane under the presence of a catalyst, in a high yield on an industrial scale for a long period of time. In the continuous production of a polyacetal resin by mixing 1,3-dioxolane with boron trifluoride and/or a coordination compound of boron trifluoride and then, mixing the obtained mixture with trioxane to conduct bulk polymerization in a polymerization machine, 1,3-dioxolane is brought into contact with boron trifluoride and/or a coordination compound of boron trifluoride while feeding both at the same direction and they are mixed together for 0.1 to 30 seconds under the condition of at least 0.1 m/sec of the linear velocity of the mixture and subsequently mixed with trioxane.
REFERENCES:
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patent: 4681927 (1987-07-01), Umemura et al.
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patent: 5929195 (1999-07-01), Kawaguchi et al.
Fukui Yuichi
Kawaguchi Kuniaki
Serizawa Hajime
Tenda Tsugio
Yamamoto Kaoru
Moore Margaret G.
Polyplastics Co. Ltd.
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