Process for improving thermoformability of methyl methacrylate p

Details Process for improving thermoformability of methyl methacrylate p Process for improving thermoformability of methyl methacrylate p

1974-06-17

1976-04-13

Wong, Jr., Harry

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 808, 260 8081, 260 861R, 260 861E, 260 861N, 260 867, 260 895A, 260885, C08F12014, C08F22014

Patent

active

039503143

ABSTRACT:
Compositions comprising methyl methacrylate polymers and copolymers containing about 0.0002 to 0.004 moles, based on metal, per 1000 grams of polymer, of a compound of certain metal compounds effective to prevent bubble formation at thermoforming temperatures. Also disclosed is a process for improving the thermoformability of methyl methacrylate polymers comprising introducing said compound in the monomer system before polymerization.

REFERENCES:
patent: 2347320 (1944-04-01), Hiltner
patent: 2888435 (1959-05-01), Wallace
patent: 3534121 (1970-10-01), Eggensperger
patent: 3562305 (1971-02-01), Hoch

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