Foamable interpolymer resin particles containing limonene as a blowing aid
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United States of America Patent
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Jun 21, 2005
Grant Date -
Aug 5, 2004
app pub date -
Jan 23, 2004
filing date -
Jan 27, 2003
priority date (Note) -
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Abstract
Interpolymer resin particles comprised of 20% to 80% by weight polyolefin, e.g. polyethylene and 80% to 20% by weight of an in situ polymerized vinyl aromatic resin, e.g. polystyrene or poly(styrene-butyl acrylate) and forming an interpenetrating network of polyolefin and vinyl aromatic resin particles. The interpolymer particles are impregnated with a volatile hydrocarbon blowing agent, and limonene, e.g. d-limonene, ranging from about 0.1 to about 5 parts, preferably 0.1 to 1 part by weight, based on 100 parts by weight of the interpolymer particles, for improved expandability and a pleasant fragrance.
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