Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Patent
1990-07-03
1993-11-23
Kight, III, John
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
528 86, 528126, 528128, 528170, 528172, 528174, 528190, 528211, 528216, 528220, 528226, 528228, C08G 802, C08G 1400
Patent
active
052645207
ABSTRACT:
This invention is a process for the preparation of poly(aryl ethers) from cyclic poly(aryl ether) oligomers. These low melt viscosity cyclic oligomers undergo ring opening and chain extension upon heating in the presence of a catalyst, forming high molecular weight linear polymers with no coproduct formation. Finished thermoplastic parts and composites may be prepared using this technology with processing techniques normally restricted to thermosetting monomers.
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Cella, et al., Ring Opening Polymerization of Cyclic Ethers & Thioethers, Imides, Sulfones via Aromatic Ether-Ether Exchange; Amer. Chem. Soc. Polymer Prep. vol. 30, No. 2 (1989), pp. 142-143.
Cella, et al., Poly. Prepr. 30(2), 581.varies.582, (Sep. 1989).
Mullins Michael J.
Woo Edmund P.
Hampton-Hightower P.
Kight III John
The Dow Chemical Company
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