POLYMER COMPOSITION FOR PREPARING FACE COATING OF ARTIFICIAL LEATHER Russian patent published in 2007 - IPC C09D175/06 D06N3/14 

FIELD: polymer materials.

SUBSTANCE: polymer composition for preparing face coating of artificial leather for upper containing 54.8-59.5% of 25% dimethylformamide solution of polyurethane "Vitur P-0112" and 14.2-15.5% of dimethylformamide further contains additive: powdered interpolymer complex based on polyacrylic acid, sodium polyphosphate and monobasic dipyridyl (9.5-16.8%) and, additionally, isopropyl alcohol (14.2-15.5%). Once applied onto substrate, composition is hardened with 10-30% aqueous dimethylformamide solution. Coating increases hygroscopicity from 2.1 to 16.5%, wettability from 106.2 to `60% for 2 h and from 149.8 to 175% for 24 h.

EFFECT: considerably improved hygienic properties of material, achieved rather high vapor-permeability characteristics and physicomechanical properties at satisfactory percentage of shrinkage during drying of face coating.

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