Chemically modified hydrophilic prepolymers and polymers

Details Chemically modified hydrophilic prepolymers and polymers Chemically modified hydrophilic prepolymers and polymers

1988-11-02

1990-07-10

Welsh, Maurice J.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

521129, 521159, 521905, 524839, 524591, 524498, 528 53, 528 57, 528 59, 528904, C08G 1814

Patent

active

049407376

ABSTRACT:
A class of modified hydrophilic prepolymers and polymers is disclosed which are characterized by their specific reactivity. Isocyanate-capped oxyethylene-based prepolymers are modified by reacting with a compound having an isocyanate-reactive group which is a sulfhydryl group, an amino group, a hydroxyl group or a carboxyl group, and a non-isocyanate-reactive group, in quantities sufficient to modify at least a portion of the isocyanate groups of the prepolymer. Where said first functional group is an amino group contained in a diamine or polyamine compound or is a carboxyl group, the modifying compound is present in quantities sufficient to modify all or substantially all of the isocyanate groups of the prepolymer.

REFERENCES:
patent: 3723393 (1973-03-01), Kistner
patent: 3939123 (1976-02-01), Matthews et al.
patent: 4137200 (1979-01-01), Wood et al.
patent: 4177038 (1979-12-01), Biebricher et al.
patent: 4182827 (1980-01-01), Jones
patent: 4226935 (1980-10-01), Fusee
patent: 4293679 (1981-10-01), Cogliano
patent: 4439585 (1984-03-01), Gould et al.
patent: 4485227 (1984-11-01), Fox
patent: 4499233 (1985-02-01), Tetenbaum et al.
patent: 4569981 (1986-02-01), Wenzel et al.
patent: 4681851 (1987-07-01), Baumgarten et al.
Smith et al., "Urethans of 2-Mercaptoethanol", J. Amer. Chem. Soc., vol. 81 (1959) pp. 161-163.
Ulrich et al., "Base-Catalyzed Reactions of Isocyanates. The Synthesis of 2,4-Dialkylallophanates", J. Org. Chem., vol. 32, (1967) pp. 3938-3941.
Farkas et al., "Catalytic Effects in Isocyanate Reactions", Advan. Catalysis, vol. 13 (1962) pp. 434-439.

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