Flame retardant polymer compositions
AssigneeAlbemarle Corporation
InventorsAnteneh Z. Worku, Daniel A. De Schryver, Susan D. Landry, Arthur G. Mack
Life of this patent
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Abstract
N,N′-piperazinebis(neopentylglycol)phosphoramidate is used in combination with at least one co-additive which is (i) melamine, (ii) one or more melamine compounds or derivatives, or (iii) both of (i) and (ii) to provide effective flame retardancy in thermoplastic polymers. With polymers that tend to release trace amounts of acid under thermal processing conditions, a hydrotalcite is preferably included in the composition. In acid-sensitive polymers such as polyesters, the N,N′-piperazinebis(neopentylglycol)phosphoramidate should be free or essentially free of acid species as determinable by use of nmr, mass spec, and/or HPLC.
Claims73
A flame retardant additive composition which comprises a blend which is the additive product of the following components (a) N,N′-piperazinebis(neopentylglycol)phosphoramidate;
- and (b) at least one melamine compound which is (i) melamine, (ii) one or more melamine compounds, or (iii) both of (i) and (ii), and any resultant reaction product or products thereof that are present in said composition, said composition having (a) to (b) in an (a):(b) weight ratio in the range of about 0.1:1 to about 5:1.
A flame retardant resin composition comprising:
- A) at least one thermoplastic polymer;
- B) N,N′-piperazinebis(neopentylglycol)phosphoramidate;
- C) at least one melamine compound which is (i) melamine, (ii) one or more melamine compounds, or (iii) both of (i) and (ii);
- and any resultant reaction product or products thereof that are present in said composition.
A flame retardant resin composition comprising a blend of at least the following ingredients:
- A) a poly(1,4-butylene terephthalate);
- B) N,N′-piperazinebis(neopentylglycol)phosphoramidate that is free or essentially free of acid species;
- C) at least one co-additive which is (i) melamine cyanurate, or (ii) melamine pyrophosphate, or (iii) both of (i) and (ii);
- said composition having B) and C) in a weight ratio of B):C) in the range of 0.1:1 to 5:1.
A composition ofclaim 26 in the form of a molded or extruded shape or object.
A method of forming a flame retardant polymer composition which comprises blending together components comprising (1) at least one thermoplastic polymer, and (2) a flame retardant amount of:
- (a) N,N′-piperazinebis(neopentylglycol)phosphoramidate and
- (b) at least one melamine compound which is (i) melamine, (ii) one or more melamine compounds, or (iii) both of (i) and (ii).
In a method of producing a flame retarded molded or extruded shape or object, which method comprises molding or extruding a flame retardant thermoplastic polymer, the improvement which comprises molding or extruding a molten thermoplastic composition made from components comprising (1) at least one thermoplastic polymer, (2) at least one acid neutralizer or acid scavenger, and (3) a flame retardant amount of:
- (a) N,N′-piperazinebis(neopentylglycol)phosphoramidate and
- (b) at least one melamine compound which is (i) melamine, (ii) one or more melamine compounds, or (iii) both of (i) and (ii).
A flame retardant resin composition which is a solidified melt blend of ingredients comprised of:
- A) at least one thermoplastic polymer;
- B) N,N′-piperazinebis(neopentylglycol)phosphoramidate;
- and
- C) at least one melamine compound which is (i) melamine, (ii) one or more melamine compounds, or (iii) both of (i) and (ii).
A flame retardant composition which is the derivative product of ingredients comprising:
- A) at least one thermoplastic polymer when said polymer was in a molten state;
- B) N,N′-piperazinebis(neopentylglycol)phosphoramidate;
- and
- C) at least one melamine compound which is (i) melamine, (ii) one or more melamine compounds, or (iii) both of (i) and (ii).
Dependencies are inferred from the claim text.