Polymer foams containing blocking agents

Details Polymer foams containing blocking agents Polymer foams containing blocking agents

1995-04-24

1996-05-14

Seidleck, James J.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521155, C08J 902, C08G 1800, C08L 2506, C08L 7504

Patent

active

055168116

ABSTRACT:
An improved closed-cell polymer foam involves the use of a polyfluorocarbon forming agent (e.g., HCFC-22) in combination with an effective amount of a hydrogen bond forming blocking agent (e.g., organic ether, ester or ketone). The presence of the blocking agent is shown to significantly reduce the escape of blowing agent from and entry of air into the foam resulting in low thermal conductivity over a longer period of time and improved thermal insulation value.

REFERENCES:
patent: 3222304 (1965-12-01), Ingram
patent: 3671470 (1972-06-01), Case
patent: 4789690 (1988-12-01), Milovanovic-Lerik et al.
patent: 4972002 (1990-11-01), Volkert
patent: 4972003 (1990-11-01), Grunbauer et al.
patent: 4997706 (1991-03-01), Smits et al.
Bartlett; Polyurethane Foam Blowing Agents, 430, Research Disclosure, Jul. 1987.

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