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US 12,460,040 B2Granted
Isocyanate-based polymer foam having improved flame retardant properties
AssigneeProprietect L.P.
InventorsHerbert Schmidt, George Ng, Le Tang, Petar Pepic, Dorota Ulman
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Abstract
There is described an isocyanate-based polymer foam having a V-0 rating according to Underwriters' Laboratories Standard 94 Flammability Test after aging of separate samples of the foam (i) for 168 hours at 150° C., and (ii) for 600 hours at 120° C. The foam may be in the form of a molded foam or a slabstock foam. The foam may be used in vehicular applications, such as an under hood application.
Claims35
A polyurethane foam produced from a reaction mixture comprising:
- (i) at least one isocyanate;
- (ii) a mixture of polyols comprising:
- (a) an aromatic polyester polyol, and (b) at least one additional polyol other than the aromatic polyester polyol;
- (iii) red phosphorus in an amount in the range of from about 18 to about 25 parts by weight per 100 parts by weight of component (ii);
- (iv) expandable graphite in an amount in the range of from about 15 to about 20 parts by weight per 100 parts by weight of component (ii);
- and
- (v) a blowing agent consisting essentially of water.
4 more elements
A polyurethane foam produced from a reaction mixture comprising:
- (i) at least one isocyanate;
- (ii) a mixture of polyols comprising:
- (a) an aromatic polyester polyol, and (b) at least one additional polyol, wherein the additional polyol comprises a polyether polyol;
- iii) a flame retardant component consisting essentially of a combination of (a) red phosphorus in an amount in the range of from about 18 to about 25 parts by weight per 100 parts by weight of component (ii), and (b) expandable graphite in an amount in the range of from about 15 to about 20 parts by weight per 100 parts by weight of component (ii);
- and
- (iv) a blowing agent consisting essentially of water.
3 more elements
Dependencies are inferred from the claim text.