Process for the use of oligomer as fiber surface treating agent

Details Process for the use of oligomer as fiber surface treating agent Process for the use of oligomer as fiber surface treating agent

1983-12-01

1984-07-31

Page, Thurman K.

Coating processes

With post-treatment of coating or coating material

Heating or drying

4273934, B05D 302

Patent

active

044630379

ABSTRACT:
A reaction between pyromellitic dianhydride (PMDA) and less than two moles of fluoroalcohol produces an intermediate with ester, free acid and anhydride groups. Reaction with an oxirane compound such as epichlorohydrin reacts at the acid sites to produce pendant hydroxyls which react with anhydride on adjacent molecules to produce oligomers. Products with fluoroalcohol:PMDA ratios of, for example, about 1:0.6 to about 1:0.85 produce treated fibers with improved retention of oil repellancy, especially when annealed at 100.degree.-130.degree. C.

REFERENCES:
patent: 4192754 (1980-03-01), Marshall et al.
patent: 4193880 (1980-03-01), Marshall
patent: 4209610 (1980-06-01), Mares et al.
patent: 4219625 (1980-08-01), Mares et al.
patent: 4264484 (1981-04-01), Patel
patent: 4329489 (1982-05-01), Saunders et al.
patent: 4346141 (1982-08-01), Remington

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