Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1996-12-12
1999-06-29
Buffalow, E. Rollins
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
525191, 525205, 525207, 525216, 525227, 525241, C08L 3314
Patent
active
059169729
ABSTRACT:
Disclosed are mixtures of two or more polymers of which at least one is cross-linked. Interpenetrating polymer networks are on hand. The polymers mix below a certain temperature and demix above this temperature (LCST behavior). Below the demixing temperature, such interpenetrating polymer networks are optically clear, above the demixing temperature they are milky, turbid and have reduced light transmission due to the light scattering of the phaseseparated system' if the refractive indices of the components do not coincide. The demixing process is fully reversible below the demixing temperature.
REFERENCES:
patent: 4722506 (1988-02-01), Chang
patent: 4881798 (1989-11-01), Yuasa et al.
patent: 5047481 (1991-09-01), Siol et al.
patent: 5104954 (1992-04-01), Mueller
Cantow Hans-Joachim
Eck Wolfgang
Wittwer Volker
BASF - Aktiengesellschaft
Buffalow E. Rollins
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