Process for the preparation of a crosslinkable binder for paints

Details Process for the preparation of a crosslinkable binder for paints Process for the preparation of a crosslinkable binder for paints

1991-12-12

1993-04-06

Schofer, Joseph L.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

524379, 524545, 525 60, 525 61, 526250, 528497, 528501, C08K 000

Patent

active

052004422

ABSTRACT:
A process is described for the preparation of a crosslinkable paint binder by working up a solution of a fluorine-containing copolymer composed of copolymerized units of a perfluoroolefin, a vinyl ester of a short-chain, saponifiable carboxylic acid and a vinyl ester of a strongly branched carboxylic acid which resists saponification. In this process, the bulk of the solvent and the residual monomers are first removed by distillation, the residual highly viscous copolymer is then dissolved in a mixture of alkanol and another solvent which is also capable of dissolving the saponified copolymer to form a homogeneous solution, and the alkaline saponification is subsequently carried out. If desired, the solvent is removed and exchanged for a paint solvent and this solution is finally filtered. A mild saponification is achieved in this manner.

REFERENCES:
patent: 4584343 (1986-04-01), Lohr et al.

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