Liquid foam systems and ASTM E-84 class 1 rated rigid,...

Details Liquid foam systems and ASTM E-84 class 1 rated rigid,... Liquid foam systems and ASTM E-84 class 1 rated rigid,...

2004-11-08

2011-11-01

Cooney, John (Department: 1765)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

C521S099000, C521S128000, C521S129000, C521S130000, C521S131000, C521S164000, C521S167000, C521S172000, C521S173000

Reexamination Certificate

active

08048935

ABSTRACT:
An all-liquid foam-forming system contains:a first part (A) containing at least one liquid isocyanate or polyisocyanate; anda second part (B) containing: at least one liquid aromatic polyester polyol having an hydroxyl value of at least 110 mg KOH/gram and an average hydroxyl functionality of at least 2, at least two liquid halogenated flame retardants and water;the foam-forming system having an NCO/OH ratio of from about 0.9:1 to about 1.3:1;wherein the first and second parts are such that reaction therebetween forms a rigid polyurethane foam having a density of at least about 5 pcf and an ASTM E-84 Class 1 rating.Resultant polyurethane foams can be used to make articles, particularly for use in commercial decorative molding applications.

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“Standard Test Method for Surface Burning Characteristics of Building Materials”, An American National Standard, Designation E-84-03; dated Apr. 2003, 19 pages.

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