Copolymerization of formaldehyde and cyclic ethers using initiat

Details Copolymerization of formaldehyde and cyclic ethers using initiat Copolymerization of formaldehyde and cyclic ethers using initiat

1998-10-21

2000-06-06

Richter, Johann

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From aldehyde or derivative thereof as reactant

549472, 585422, 528246, 528250, 528405, 528425, C07D31701, C07D32112, C08G 222, C08G 400

Patent

active

060720212

ABSTRACT:
This invention concerns a process for the copolymerization of formaldehyde with cyclic ethers, the process comprising combining in a hydrocarbon solvent a cyclic ether, a cationic initiator comprising an anion formed from tetraphenyl borate derivatives, and mixtures thereof, and a cation, and anhydrous formaldehyde. These initiators provide high activity, high cyclic ether incorporation rates, and stability while minimizing the production of by-products.

REFERENCES:
patent: 3803094 (1974-04-01), Ishi et al.
patent: 5641853 (1997-06-01), Drysdale
Encyclopedia of Polymer Science and Engineering, 2.sup.nd Ed., Wiley, New York, c1985.
Strauss, Chemical Reviews, 93, 927ff, 1993.
Jia et al., Organometallics, 16, 842ff, 1997.
Chen, Journal of Polymer Science, 14, 129ff, 1976.
Kedrina et al., Polymer Science, 33, 799ff, 1991.
Kubisa, Polimery, 21, 393ff, 1976.
Research Disclosure, No. 11513, XP002091374, pp. 13-14, Nov. 1973.

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