Carbon black-containing bimodal foam structures and process for

Details Carbon black-containing bimodal foam structures and process for Carbon black-containing bimodal foam structures and process for

1992-12-14

1993-08-31

Foelak, Morton

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

521 81, 521 82, 521 841, 521 99, 521138, 521139, 521147, 521148, 521149, C08J 900

Patent

active

052409686

ABSTRACT:
Disclosed is a a bimodal, insulative, styrenic polymer foam structure comprising a foam of a styrene polymer material of greater than 50 percent by weight of styrenic monomeric units, the foam having relatively larger primary cells with a cell size range of 0.05 to 1.2 millimeters and relatively smaller secondary cells ranging in cell size from about 5 percent to about 50 percent of the average cell size of the primary cells. The primary and secondary cells constitute at least about 90 percent of the total cell volume within the foam structure. The bimodal structure has an amount of carbon black sufficient to reduce the thermal conductivity of the structure below that of a corresponding bimodal structure without carbon black. Further disclosed is a process for making the foam structure.

REFERENCES:
patent: 4795763 (1989-01-01), Gluck
patent: 5137930 (1992-08-01), Soukup
patent: 5149722 (1992-09-01), Soukup

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