Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Patent
1992-04-30
1993-07-20
Kight, III, John
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
528129, 528171, C08G 804, C08G 7500
Patent
active
052294838
ABSTRACT:
A stain-resist agent for polyamides fibers, its preparation and use are disclosed. The stain-resist agent is the condensation product of a phenolic of which at least 67 weight percent is bis-hydroxyphenylsulfone and the remainder p-cresol, p-phenolsulfonic acid or methyl-p-hydroxybenzoate, with from about 0.4 to 2.3 moles, per mole of the phenolic of a mercapto-substituted carboxylic acid selected from mercaptosuccinic acid, mercaptoacetic acid or mercaptopropionic acid; and about 1.4 to about 3.7 moles per mole of mercapto-substituted carboxylic acid of formaldehyde and sufficient base to neutralize all of the mercapto-substituted carboxylic acid groups and part but not all of the phenolic groups. The product contains about 3 to about 6 phenolic moieties with a molecular weight of 1500 to 2500 being preferred. Generally the reaction is carried out at reflux temperature (100.degree. to 103.degree. C.) for a period of 24 to 72 hours. Generally the stain-resist is applied to the polyamide fibers at a pH of 1.8 to 5.0 for a period of 1 to 60 minutes.
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E. I. Du Pont de Nemours and Company
Kight III John
Mosley T.
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