Non-swelling sealing material and method of preparing the same
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United States of America Patent
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Aug 7, 2001
Grant Date -
N/A
app pub date -
Dec 30, 1998
filing date -
Jan 7, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
1 mole of 4,4'-diphenylmethane diisocyanate is mixed with 2 moles of polyoxypropyelene glycol monoether having mean molecular weight of 2800 while adding 0.03% of tin octylate as a catalyst, and reaction is made at 80.degree. C. for three hours for obtaining a synthetic. This synthetic is employed as a main component and blended with a filler and the like for obtaining a sealing material composite. This composite causes no swelling of a gasket forming a flange part of a trunk lid of an automobile.
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