Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1989-12-19
1990-09-04
Lipman, Bernard
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
5253299, 5253301, 5253304, 5253306, 525378, 525379, 525384, C08F 832
Patent
active
049545744
ABSTRACT:
Glutarimide polymers having an acid and anhydride content lower than the acid and/or anhydride content normally present in the glutarimide polymers. Blends of the reduced acid and anhydride glutarimide polymers with thermoplastic materials are disclosed. A process for altering the properties of imide polymers by reducing or substantially removing acid and anhydride levels normally present in the imide polymer is also disclosed.
REFERENCES:
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patent: 3639357 (1972-02-01), Cohen
patent: 4129619 (1978-12-01), Fava
patent: 4157431 (1979-06-01), Fields et al.
patent: 4246374 (1981-01-01), Kopchik
patent: 4423194 (1983-12-01), Lobach et al.
Bortnick Newman M.
Cohen Leslie A.
Freed William T.
Fromuth Harry C.
Hallden-Abberton Michael P.
Lipman Bernard
Rohm and Haas Company
Taylor, III John E.
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