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
1999-01-11
2000-08-22
Niland, Patrick D.
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...
524538, 524539, 524591, 524839, 524840, 525403, 525424, 525440, 525453, 525454, 525455, C08J 300, C08K 320, C08L 7500, C08L 5100, C08L 7700
Patent
active
061073946
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
This invention relates to polymeric compounds which are useful as thickeners for aqueous compositions, especially emulsion polymer latexes.
BACKGROUND ART
Many aqueous systems require thickeners in order to be useful for various types of applications. Such aqueous-based systems as cosmetics, protective coatings for paper and metal, printing inks, and latex paints all require the incorporation of thickeners in order to have the proper rheological characteristics for their particular uses. Many substances useful as thickeners are known in the art. These include natural polymers such as casein and alginates, and synthetic materials such as cellulose derivatives, acrylic polymers, and polyurethane polymers. Polyurethanes have found particular application as latex paint thickeners.
British Patent No. 1,069,735 teaches a process for making water soluble or water swellable surface active products. One aspect of G.B. 1,069,735 teaches that a polymer of the formula R--Y--A--Y--R wherein R is a hydrocarbon radical having more than 8 carbon atoms, Y is the group --NHCOO--, and A is a polyethylene glycol ether by reaction of a polyethylene glycol ether having a molecular weight of at least 1,000 with a monofunctional isocyanate of the formula RNCO wherein R is a hydrocarbon radical having more than 8 carbon atoms. Another aspect of G.B. 1,069,735 teaches that a polymer of the formula R--Y--(A--T).sub.n --A--Y--R wherein R is a hydrocarbon radical having more than 8 carbon atoms, Y is the group --NHCOO--, A is a polyethylene glycol ether, T is a diisocyanate residue, and n is a whole number .ltoreq.10 can be made by reaction of a polyethylene glycol ether having a molecular weight of at least 1,000 with a monofunctional isocyanate of the formula RNCO wherein R is a hydrocarbon radical having more than 8 carbon atoms. A third aspect taught by G.B. 1,069,735 is that a polymer of the formula R--X--(A--T).sub.n --A--X--R wherein R is a hydrocarbon radical having more than 8 carbon atoms; x is the group --NHCOO--, --SCONH--, --NHCONH--, N--CONH--, or --CONH--; A is a polyethylene glycol ether, T is the diisocyanate residue, and n is a whole number .ltoreq.10 by reaction of a polyethylene glycol ether having a molecular weight of at least 1,000 and a diisocyanate so that an excess of isocyanate groups is present over those needed to react with the hydroxyl groups of the polyethylene glycol and a monofunctional alcohol, mercaptan, phenol, or carboxylic acid or a primary or secondary amine, said monofunctional compound has a hydrocarbon radical having more than 8 carbon atoms; in which process the total amount of hydrocarbon radical which contains more than 8 carbon atoms does not amount to >6% by weight of the reaction product. Japanese Kokai Patent 48-97783 teaches that compounds of the formula ##STR1## wherein Z is a polyether polyol residue derived from a compound containing active hydrogen atoms and alkylene oxide in which the polyether contains 20%-90% by weight oxyethylene groups; m is a number ranging from 2 to 8 and which signifies the number of hydroxyl groups per polyether polyol molecule; A is the residue of a divalent organic group such as a tolylene diisocyanate residue; Y is a residue of a compound containing active hydrogen atoms such as an ethoxylated C.sub.14 aliphatic alcohol; and n is a number equal to at least 3, can be used as thickeners in aqueous media such as in latex paints. U.S. Pat. No. 4,079,028 teaches a latex paint composition containing an emulsion polymer and from 0.1 to about 10% by weight based on emulsion polymer solids of a thickener selected from polymers of Groups A, B, and C. Polymers of group A are linear polymers of the formula A--B.sub.p --E.sub.q --(B--E).sub.m --B.sub.r --E.sub.t --A wherein each of p, q, r, and t independently is zero or 1; at least one of q and r is 1, and t is zero when r is zero; provided that, when q is 1, then: (a) each of p, r, and t is zero; or (b) p is zero and each of r and t is 1; or (c) t is zero and each of r and p is 1; an
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Breindel Kenneth
Broadbent Ronald W.
Drach John E.
Henkel Corporation
Millson Jr. Henry E.
Niland Patrick D.
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