Patent ID: 11866538
Assignee: JIANGNAN UNIVERSITY
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C  D | IPC C  D

Claim 13:
14. A hydrophobic fabric, prepared by a process comprising the steps of:
impregnating a fabric in a finishing liquid comprising a polyurethane-acrylate water repellant, and
padding, drying, and curing the fabric to obtain the hydrophobic fabric,
wherein the polyurethane-acrylate water repellant comprises carbon-carbon double bonds introduced in a polyurethane side chain, and has the structure in formula (I):, and wherein:
R1 is an oxime blocking group;
R2 is derived from a diisocyanate monomer;
R3 is selected from alkyl, phenyl, a cyclic group, acyl, an ester group, carbonyl, and an ether group having any number of carbon atoms;
R4 is selected from alkyl, a cyclic group and its derivatives, and phenyl and its derivatives;
R5 is a carbon chain having 1 to 18 carbon atoms;
R6 is derived from polyether or polyol polyorganic compounds;
R7 is derived from a hydrophilic chain extender; and
a and n are natural numbers of 1 to 100.