Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...
Reexamination Certificate
2005-02-15
2005-02-15
Cooney, Jr., John M. (Department: 1711)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Cellular products or processes of preparing a cellular...
C521S131000, C521S137000, C521S170000, C521S174000
Reexamination Certificate
active
06855742
ABSTRACT:
The present invention provides a high support (HS) and high support-high resilience (HS-HR) flexible polyurethane foams prepared by catalyzed reaction of one or more di- or polyisocyanates at an isocyanate index from about 70 to about 130 with:(a) a polyoxyalkylene polyol or polyoxyalkylene polyol blend having an average hydroxyl weight of at least about 1000 and an average primary hydroxyl content of at least about 25%; and(b) an effective amount of a blowing agent containing water;in the presence of from about 0.01 to about 0.5% parts by weight based on 100 parts by weight of said polyol component of a liquid hydrocarbon containing greater than 50% of polymerized butadiene. The high support (HS) and high support-high resilience (HS-HR) flexible polyurethane foams of the present invention have a reduced force to crush (FTC).
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Adhikari Utpal C.
Hager Stanley L.
Bayer Antwerp N.V.
Cooney Jr. John M.
Gil Joseph C.
Mrozinski, Jr. John E.
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