Production of low molecular weight polyanhydrides

Details Production of low molecular weight polyanhydrides Production of low molecular weight polyanhydrides

1976-11-05

1978-02-14

Wong, Jr., Harry

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

260 47UA, 260837R, 526237, 526272, 526284, 526292, 526293, 526296, 526309, 526317, C08F 412, C08F21206, C08F22008

Patent

active

040740366

ABSTRACT:
In a process for the production of a low molecular weight polyanhydride having a softening point within the range of about 111.degree. to 156.degree. C. by the mass polymerization reaction of a maleic monomer and at least one alkyl-substituted styrene at a temperature in the range of about 140.degree. to 200.degree. C., the improvement comprising employing an alkali metal bifluoride, preferably potassium bifluoride, as catalyst for the reaction.

REFERENCES:
patent: 3732332 (1973-05-01), Curtis et al.
patent: 3789038 (1974-01-01), Curtis et al.
patent: 3929738 (1975-12-01), Curtis et al.

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