Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...
Patent
1992-04-02
1993-10-12
Foelak, Morton
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Cellular products or processes of preparing a cellular...
521 62, 521 63, 521 64, 521150, 521178, C08J 928
Patent
active
052526208
ABSTRACT:
Supercritical drying has distinct advantages in generating microcellular materials. The dimensional stability of the polymer is not affected on drying because the supercritical process does not go through the two phase path and therefore the effect of capillary forces is absent. This helps in maintaining the morphology of the final polymer structure and better control over cell size.
Organic microcellular foams were prepared by polymerizing directly in a near-critical fluid and pursuing the supercritical drying in the same reactor. The critical variables are the choice of a diluent with a strong enough solvent power to stabilize the polymer matrix, but with a low enough critical temperature to permit critical point drying without damage to the polymer matrix.
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"Aerogels, Why They are in Vogue," Chemtech, Jun. 1991, 372-377, by S. J. Teichner.
"Microcellular foams? For What?," Chemtech, Apr. 1991, 234-238, by J. H. Aubert and A. P. Sylwester.
"Microcellular Methacrylates: Effect of Supercritical Drying on Pore Size and Density" Polymer Comm., 32, 10-12 (1991) by J. Richard Elliott Jr., R. Akhaury, G. Srinivasan.
Aiche fall National Meeting, Chicago, Nov. 15, 1990.
Aiche Fall National Meeting, Los Angeles (1991).
Akhaury Ranjan
Dhanuka Manish
Elliott, Jr. Jarrell R.
Srinivasan Gokul
Foelak Morton
University of Akron
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