Insulating alkenyl aromatic polymer foam

Details Insulating alkenyl aromatic polymer foam Insulating alkenyl aromatic polymer foam

C - Chemistry, Metallurgy

08

J

18/666

C08J 9/06 (2006.01) B29C 47/00 (2006.01) C07C 19/08 (2006.01) C08F 112/08 (2006.01) C08J 9/14 (2006.01)

Patent

CA 2027756

Dimensionally stable alkenyl aromatic thermoplastic synthetic resinous elongate foam bodies having closed noninterconnecting gas-containing cells having an average cell size of 0.05 to 2.0 millimeters, a minimum cross-sectional dimension of at least 0.25 inch, a cross-sectional area of at least 8 square inches, a water vapor permeability not greater than 1.8 perm inch, a density of from 1.0 to 5.0 pounds per cubic foot (16 to 80 g/l), and an absolute dimensional stability of less than 4 percent in any direction when measured by the test designated ASTM D2126/C578 are prepared using 1,1-difluoro-1-chloroethane as a blowing agent and extruding at controlled temperatures.

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