| 摘要 |
In this process, a polyurethane foam web with a thickness of 5 mm to 30 mm is passed continuously through a dipping bath and is thereby impregnated with 10% to 1000% by weight of a polymer dispersion consisting of the components A) and B) defined below: A) 30% to 65% by weight, preferably 40% to 60% by weight and particularly preferably 45% to 50% by weight of a cationic styrene/butadiene copolymer latex containing about 50% of dry substance, or of an anionic butadiene/acrylonitrile copolymer latex, and B) 10% to 50% by weight, preferably 15% to 40% by weight and particularly preferably 25% to 35% by weight of an inorganic and/or organic pulverulent filler, and the foam web treated in this way is compressed to remove excess liquid and then dried in a drying oven at temperatures of 80 DEG C. to 120 DEG C.
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