Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Patent
1982-05-20
1984-05-01
Nielsen, Earl A.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
560 87, C08G 6368
Patent
active
044463065
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: 4134839 (1979-01-01), Marshall
patent: 4190545 (1980-02-01), Marshall et al.
patent: 4192754 (1980-03-01), Marshall et al.
patent: 4193880 (1980-03-01), Marshall
patent: 4209610 (1980-06-01), Mares et al.
patent: 4252982 (1981-02-01), Oxenrider
patent: 4283292 (1981-08-01), Marshall et al.
patent: 4317736 (1982-03-01), Marshall
patent: 4321403 (1982-03-01), Oxenrider et al.
patent: 4329489 (1982-05-01), Saunders et al.
Application of Thomas et al., Ser. No. 350,544, filed Feb. 19, 1982.
Allied Corporation
Doernberg Alan M.
Fuchs Gerhard H,.
Massengill Roy H.
Nielsen Earl A.
LandOfFree
Oligomer-containing mixtures useful as fiber surface treating ag does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Oligomer-containing mixtures useful as fiber surface treating ag, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Oligomer-containing mixtures useful as fiber surface treating ag will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2033057