초록 ▼

Rheology modifiers useful in water-based and organic solvent-based compositions are derived from the reaction of polyalkylene oxide, polyfunctional material, diisocyanate, water and a monofunctional active hydrogen-containing compound or monoisocyanate. The modifiers are characterized by having a br

Rheology modifiers useful in water-based and organic solvent-based compositions are derived from the reaction of polyalkylene oxide, polyfunctional material, diisocyanate, water and a monofunctional active hydrogen-containing compound or monoisocyanate. The modifiers are characterized by having a branched structure, urea linkages and terminal hydrophobic groups.

대표청구항 ▼

A urethane rheology modifier characterized in having a branched structure and terminal hydrophobic groups, derived from the reaction of: (a) for each 8 moles of a polyalkylene oxide having a molecular weight of from about 2,000 to about 20,000; (b) from about 0.1 moles to about 3 moles of a polyfun

A urethane rheology modifier characterized in having a branched structure and terminal hydrophobic groups, derived from the reaction of: (a) for each 8 moles of a polyalkylene oxide having a molecular weight of from about 2,000 to about 20,000; (b) from about 0.1 moles to about 3 moles of a polyfunctional material, said material being a compound having at least 3 active hydrogens capable of reacting with isocyanate or a polyisocyanate having at least 3 isocyanate groups; (c) from about 7 moles to about 30 moles of a diisocyanate; (d) from about 3 moles to about 14 moles water; and (e) sufficient monofunctional active hydrogen-containing compound or monoisocyanate to end-cap substantially all free isocyanate or hydroxy groups. A coating composition consisting essentially of a film-forming polymeric resin and about 0.1% to about 10%, based on the film-forming polymeric resin solids, of a rheology modifier, said modifier characterized in having a branched structure, terminal hydrophobic groups and derived from the reaction of: (a) for each 8 moles of a polyalkylene oxide having a molecular weight of from 2,000 to about 20,000; (b) from about 0.1 moles to about 3 moles of a polyfunctional material, said material being a compound having at least 3 active hydrogens capable of reacting with isocyanates or is a polyisocyanate having at least 3 isocyanate groups; (c) from about 7 moles to about 30 moles of a diisocyanate; (d) from about 3 moles to about 14 moles water; and (e) sufficient monofunctional active hydrogen-containing compound or monoisocyanate to end-cap substantially all free isocyanate or hydrogen groups.