High molecular weight polycondensates from solid phase condensat

Details High molecular weight polycondensates from solid phase condensat High molecular weight polycondensates from solid phase condensat

1975-11-26

1978-03-21

Lee, Lester L.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 47C, 260 75M, C08G 6314, C08G 6318, C08G 6326

Patent

active

040803171

ABSTRACT:
Polyester precondensates are catalytically polycondensed in solid phase at a constant temperature with a linear increase (during polycondensation) in intrinsic viscosity. The linear increase makes possible an accurate advance determination of reaction time required to produce thermoplastic polycondensate of the desired intrinsic viscosity.

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patent: 3544525 (1970-12-01), Balint et al.
patent: 3551386 (1970-12-01), Berkau et al.
patent: 3657388 (1972-04-01), Schweizer et al.
patent: 3801547 (1974-04-01), Hoeschele
patent: 3816377 (1974-06-01), Okuzumi

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