Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Patent
1995-10-20
1997-09-30
Niland, Patrick
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
524307, 524507, 524591, 525123, 525455, 528 70, C08J 300, C08K 320, C08L 7500, C08G 1828
Patent
active
056726511
ABSTRACT:
This invention provides compositions for treating fibrous substrates to render those substrates durably repellent to water and oil and durably resistant to dry soil comprising a fluorochemical polymer formed by: (a) reacting a tri- or higher order isocyanate with a fluorochemical alcohol; (b) reacting the resulting product with an amount of water sufficient to react with between 5 and 50% of the isocyanate groups present in the product compound; and (c) thereafter reacting the product with a difunctional poly(oxyalkylene)-containing material.
The present invention also provides a method of treating fibrous substrates to render those substrates durably repellent to water and oil and durably resistant to dry soil comprising application of the aforementioned composition to a fibrous substrate with one or more hydrophilic anti-staining compounds such as acrylic and methacrylic acid polymers and copolymers, sulfonated phenol-formaldehyde resins, and styrene-maleic anhydride polymers and copolymers, said application of the composition taking place either coincident with or following application of the hydrophilic anti-staining compound or compounds to the substrate. Fibrous substrates treated according to this method and fibrous substrates treated with the aforementioned compositions are also disclosed.
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Burtis John A.
Griswold Gary L.
Kirn Walter N.
Minnesota Mining and Manufacturing Company
Niland Patrick
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