Pigment preparations
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United States of America Patent
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Oct 28, 1980
Grant Date -
N/A
app pub date -
Jan 15, 1979
filing date -
Jan 17, 1978
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Pigment preparations containing 2-70 % by weight, relative to the total preparation, of an inorganic or organic pigment dispersed in a solution of 10 to 49% by weight, relative to the total preparation, of a water-insoluble copolymer in an organic solvent, the copolymer containing 40-60% by weight of acrylic acid ethyl ester, 30-50% by weight of methacrylic acid methyl ester and 5-15 % by weight of acrylic acid hydroxyethyl and/or hydroxypropyl ester or methacrylic acid hydroxyethyl and/or hydroxypropyl ester and being prepared at 50.degree.-170.degree. C. in the presence of 0.5-5.0% by weight, relative to the sum of the monomers, of an organic per-compound or an azo compound which supplies free radicals at 50.degree.-170.degree. C., in an organic solvent, and their use for pigmenting dressing agents for leather and imitation leathers.
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