Flame retardant urea-bio based urethane compositions
View Patent ↗Flame retardant urethane compositions of this invention are produced by reacting a urea and/or urea condensate, a bio based compound and a polyisocyanate. The urea condensation compositions are produced by heating urea or heating urea to produce isocyanic acid and/or cyanic acid which reacts with urea to form urea condensates. The bio based compound are environmentally friendly, replaceable compound such as vegetable oils, molasses, sugar, lignin and hemi-cellulose. The urea and/or urea condensation compounds may be mixed with or reacted with carbonization auxiliaries. For example, polyurethane foams can be rendered less flammable with urea and/or urea condensation compounds and utilized as insulating and sound proofing materials.
1. A flame retardant polyurethane composition produced by the process consisting of mixing and reacting the following components:
Component B consisting of
(A) urea and/or urea condensates, in the amount of 50 to 200 parts by weight;
(B) soy oil, in the amount of 50 to 200 parts by weight;
(C) water, in the amount of 0 to 200 parts by weight;
(D) blowing agent, in the amount of 0 to 50 parts by weight;
(E) urethane catalyst, in the amount of 0 to 20 parts by weight;
(F) carbonization auxiliaries, in the amount of 0 to 50 parts by weight;
(G) surfactant, 0 to 20 parts by weight;
(H) compound with an active hydrogen that will react with a polyisocyanate, in the amount of 0 to 100 parts by weight;
Component A consisting of:
(I) polylsocyanate, selected from the group consisting of 4,4 diphenylmethane diisocyanate 2,4 diphenylmethane diisocyanate and mixtures thereof, in the amount of 50 to 400 parts by weight;
Component A and Component B are mixed and reacted.
2. A flame retardant polyurethane composition produced by the process comprising of mixing and reacting the following components:
Component B consisting of
(A) urea and/or urea condensates, in the amount of 50 to 200 parts by weight;
(B) bio based compound selected from the group consisting of molasses, corn syrup, sugar and mixtures thereof,
(C) water, in the amount of 0 to 200 parts by weight;
(D) blowing agent, in the amount of 0 to 50 parts by weight;
(E) urethane catalyst, in the amount of 0 to 20 parts by weight;
(F) carbonization auxiliaries, in the amount of 0 to 50 parts by weight;
(G) surfactant, 0 to 20 parts by weight;
(H) compound with an active hydrogen that will react with a polyisocyanate, in the amount of 0 to 100 parts by weight;
Component A consisting of:
(I) polyisocyanate, selected from the group consisting of 4,4 diphenylmethane diisocyanate, 2,4 diphenylmethane disocyanate and mixtures thereof, in the amount of 50 to 400 parts by weight;
Component A and Component B are mixed and reacted.
3. A method for producing flame retardant urethane compositions consisting of mixing and reacting the following components;
Component B consisting of:
(A) urea and/or urea condensate, in the amount of 50 to 200 parts by the weight;
(B) bio based compound selected from the group consisting of vegetable oil, molasses, corn syrup, sugar and mixtures thereof, in the amount of 50 to 200 parts by weight,
(C) water, in the amount of 0 to 200 parts by weight;
(D) blowing agent, in the amount of 0 to 200 parts by weight;
(E) urethane catalyst, in the amount of 0 to 20 parts by weight;
(F) carbonization auxiliaries: 0 to 50 parts by weight;
(G) surfactant, 0 to 20 parts by weight;
(H) compound with an active hydrogen that will react with a polyisocyanate, in the amount of 0 to 100 parts by weight;
Component A consisting of:
(I) polyisocyanate, selected from the group consisting of 4,4 diphenylmethane diisocyanate, 2,4 diphenylmethane diisocyanate and mixtures thereof, in the amount of 50 to 400 parts by weight;
Component A and Component B are mixed and reacted.