Reaction product of a phosphorous acid with ethyleneamines, formaldehyde, and amine for flame resistance
OwnerRobert Kasowski, Maya Kasowskiinventors
Life of this patent
Estimating the term…
Abstract
Flame retardants, and compositions containing the flame retardants are disclosed. The flame retardants are prepared reacting ethylene diamine with polyphosphoric acid; or reacting an ethyleneamine or a mixture of ethyleneamines with phosphoric acid, polyphosphoric acid, pyrophosphoric acid, or a mixtures thereof. A 10% by weight solution of the product in water has a pH between about 3.5 to 6.5. The flame retardants are non-halogen containing flame retardants that do not gas undesirably during processing at temperatures of 235° C. or even higher.
Claims21
1-20. (canceled)
A flame retardant composition prepared by a method of either (a) reacting ethylene diamine with polyphosphoric acid, or (b) reacting an ethyleneamine or a mixture of ethyleneamines with an acid selected from the group consisting of phosphoric acid, polyphosphoric acid, pyrophosphoric acid, and mixtures thereof;
- in which the ratio of the acid or acid mixture to the ethylene diamine, the ethyleneamine, or the mixture of ethyleneamines is such that a 10% solution of the flame retardant composition in water has a pH between about 2.02 to 6.5.
A flame retardant containing composition comprising:
- a) 30 to 99.75 percent by weight of a polymer;
- and
- b) 0.25 to 70 percent by weight of the flame retardant composition,
- the flame retardant composition prepared by a method of either (a) reacting ethylene diamine with polyphosphoric acid, or (b) reacting an ethyleneamine or a mixture of ethyleneamines with an acid selected from the group consisting of phosphoric acid, polyphosphoric acid, pyrophosphoric acid, and mixtures thereof;
- in which the ratio of the acid or acid mixture to the ethylene diamine, the ethyleneamine, or the mixture of ethyleneamines is such that a 10% solution of the flame retardant composition in water has a pH between about 2.02 to 6.5.
Dependencies are inferred from the claim text.