Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1993-01-12
1994-11-29
Marquis, Melvyn I.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
525537, C08G 7514, C08L 8104
Patent
active
053691911
ABSTRACT:
Disclosed herein are an aromatic thioether ketone/thioether sulfone random copolymer comprising phenylene thioether ketone recurring units (I) and phenylene thioether sulfone recurring units (II), (a) the compositional ratio (I:II) of the recurring units (I) to the recurring units (II) ranging from 98:2 to 65:35, (b) the solution viscosity (.eta..sub.inh) being at least 0.3 dl/g, (c) the melt crystallization time (f) being at least 3 minutes, (d) the melting point (Tm) being 300.degree.-350.degree. C., (e) the glass transition temperature being at least 125.degree. C., (f) the retention (400.degree. C./20 min) of melt crystallization enthalpy (.DELTA.Hmc) being at least 60%, and (g) the average particle size being at least 0.1 mm, and the production process thereof.
REFERENCES:
patent: 4895925 (1990-01-01), Satake et al.
patent: 5008370 (1991-04-01), Kashiwadate et al.
patent: 5120808 (1992-06-01), Satake et al.
Kirk-Othmer "Encyclopedia of Chemical Technology" Third Edition, vol. 6, pp. 798-803.
Kawakami Yukichika
Shiiki Zenya
Kureha Kagaku Kogyo K.K.
Lee Helen F.
Marquis Melvyn I.
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