S-EB-S block copolymer/oil aqueous dispersion and its use in forming articles
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United States of America Patent
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Jul 2, 2002
Issued Date -
N/A
app pub date -
Sep 11, 2001
filing date -
Aug 12, 1996
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Abstract
A dispersion has particles dispersed in a continuous aqueous dispersion medium. The particles, preferably no more than about 2 micrometers in size, are formed of a mixture of styrene-ethylene/butylene-styrene (S-EB-S) block copolymer having end blocks each with a weight average molecular weight of more than about 15,000 Daltons and an oil such as a mineral oil. The dispersion medium is a mixture of water and a surfactant. Articles are prepared by dipping a form into the dispersion and withdrawing the form to leave a film of the dispersion on the form. The water is evaporated from the film, leaving a coherent extensible film on the form.
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