Method of producing a flexible polyurethane foam article
AssigneeBASF SE
InventorsSteven E. Wujcik, Rajesh Kumar, Christopher J. Milantoni
Life of this patent
Estimating the term…
Abstract
A flexible polyurethane foam article exhibiting flame resistance comprises the reaction product of an isocyanate and an isocyanate-reactive component comprising a polyol reactive with the isocyanate. The isocyanate and the isocyanate-reactive component are reacted in the presence of a blowing agent and a phospholene oxide. A method of producing the flexible polyurethane foam article includes the step of reacting the isocyanate and the isocyanate-reactive component in the presence of the blowing agent and an effective amount of the phospholene oxide to form the flexible polyurethane foam article which is flame resistant.
Claims19
A method of producing a flexible polyurethane molded foam article which exhibits flame resistance, said method comprising the step of reacting:
- (A) an isocyanate comprising toluene diisocyanate;
- and
- (B) an isocyanate-reactive component comprising a first polyol;
- wherein (A) and (B) are reacted in the presence of a blowing agent and a phospholene oxide component, said phospholene oxide component present in an amount of from 0.05 to 6.0 parts by weight based on 100 parts by weight of total polyol present in said isocyanate-reactive component, and optionally a halogen free flame retardant in an amount of less than 13 parts by weight based on 100 parts by weight of total polyol present in said isocyanate-reactive component,
- wherein the phospholene oxide component is a solution comprising 3-methyl-1-phenyl-2-phospholene oxide and triethyl phosphate in a weight ratio of from 1:3 to 1:1,
- wherein (A) and (B) are reacted at an isocyanate index of from 90 to 120, and the flexible polyurethane molded foam article produced by the method meeting at least one of the following two requirements for flame resistance:
- (1) an average burn resistance of less than 4 inches per minute when measured according to 49 C.F.R. § 571.302, Standard No. 302;
- and
- (2) before and after aging for 24 hours at 220° F. (104° C.) when measured according to State of California Technical Bulletin 117, Section A, Part I,
- an average char length of less than or equal to 6 inches, and
- a maximum char length of less than or equal to 8 inches, and
- an average afterflame of less than or equal to 5 seconds, and
- a maximum afterflame of less than or equal to 10 seconds, and
- an average afterglow of less than or equal to 15 seconds.
A flexible polyurethane molded foam article exhibiting flame resistance comprising the reaction product of:
- (A) an isocyanate comprising toluene diisocyanate;
- and
- (B) an isocyanate-reactive component comprising a first polyol;
- wherein (A) and (B) are reacted in the presence of a blowing agent and a phospholene oxide component, said phospholene oxide component present in an amount of from 0.05 to 6.0 parts by weight based on 100 parts by weight of total polyol present in said isocyanate-reactive component, and optionally a halogen free flame retardant in an amount of less than 13 parts by weight based on 100 parts by weight of total polyol present in said isocyanate-reactive component,
- wherein the phospholene oxide component is a solution comprising 3-methyl-1-phenyl-2-phospholene oxide and triethyl phosphate in a weight ratio of from 1:3 to 1:1,
- wherein (A) and (B) are reacted at an isocyanate index of from 90 to 120, and the flexible polyurethane molded foam article meeting at least one of the following two requirements for flame resistance:
- (1) an average burn resistance of less than 4 inches per minute when measured according to 49 C.F.R. § 571,302, Standard No. 302;
- and
- (2) before and after aging for 24 hours at 220° F. (104° C.) when measured according to State of California Technical Bulletin 117, Section A, Part I,
- an average char length of less than or equal to 6 inches, and
- a maximum char length of less than or equal to 8 inches, and
- an average afterflame of less than or equal to 5 seconds, and
- a maximum afterflame of less than or equal to 10 seconds, and
- an average afterglow of less than or equal to 15 seconds.
Dependencies are inferred from the claim text.