Spherical colored polyester particles, process for their preparation, and their use for powder coatings
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United States of America Patent
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Jul 17, 2001
Grant Date -
N/A
app pub date -
Aug 13, 1999
filing date -
Feb 17, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention relates to homogeneously colored polyester particles having a mean particle size <50 .mu.m and a monomodal particle size distribution with a span (=d90-d10/d50).ltoreq.2.5, which can be melted at temperatures <200.degree. C. to form a continuous coating, to a process for their preparation and to their use for powder coatings. In a preferred embodiment the particles comprise units of formulae (1) and (2) --CO--X--CO (1) --O--D--O-- (2) where X is a substituted or unsubstituted C.sub.6 to C.sub.14 aromatic radical or an alkylene, polymethylene, cycloalkane or dimethylene-cycloalkane group or a straight-chain or branched, saturated or unsaturated alkanediyl group and D is an alkylene, polymethylene, cycloalkane or dimethylene-cycloalkane group or a straight-chain or branched, saturated or unsaturated alkanediyl group.
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