Phosphorous-containing flame retardants for polyurethane foams
AssigneeDow Global Technologies LLC
InventorsYudong Qi, Xiangyang Tai
Life of this patent
Estimating the term…
Abstract
Embodiments of the invention include a phosphorus containing flame retardant which may be the reaction product of a reaction mixture where the reaction mixture includes at least one active hydrogen-containing compound and at least one phosphorus containing compound. The at least one active hydrogen-containing compound is selected from the group of a first polyol having a hydroxyl functionality of at least 3, a polyamine having an amine functionality of at least 2, and an amino alcohol having a combined amine and hydroxyl functionality of at least 2. The at least one phosphorus containing compound has the general formula (1), (2) or combination thereof:
Claims15
A phosphorus containing flame retardant comprising the reaction product of a reaction mixture, comprising:
- (1) at least one active hydrogen-containing compound that is:
- (a) a first polyol having a hydroxyl functionality of at least 5,
- (b) a polyamine having an amine functionality of 2 and the structure as given in Formula (II):
- H2N—(CH2)n—[N(R)—(CH2)p]y—NH2 (II)
- wherein n and p are independently integers from 2 to 6, R is a hydroxyalkyl having 2-6 carbons, and y is 1;
- (2) at least one phosphorus containing compound having the general formula (1), (2) or combination thereof:
- wherein X is a leaving group, R1 and R2 are, independently of one another, a C1-C8-alkyl, C1-C4-alkoxyethyl, C1-C4-alkyl-substituted C6-C10-aryl radical, alkyl substituted aryl, aryl substituted alkyl, nitro alkyl, hydroxyl alkyl, alkoxy alkyl, hydroxyl alkoxyalkyl, or R1 and R2 together form R in a six-membered ring, wherein the six membered ring has the general formula (3), (4) or combination thereof:
- wherein R is a linear or branched divalent alkylene group containing from 3 to about 9 carbon atoms.
A method of making a phosphorus containing flame retardant, the method comprising:
- reacting at least:
- (1) at least one active hydrogen-containing compound that is:
- (a) a first polyol having a hydroxyl functionality of at least 5,
- (b) a polyamine having an amine functionality of 2 and the structure as given in Formula (II):
- H2N—(CH2)n—[N(R)—(CH2)p]yNH2 (II)
- wherein n and p are independently integers from 2 to 6, R is a hydroxyalkyl having 2-6 carbons, and y is 1;
- (2) at least one phosphorus containing compound having the general formula (1), (2) or combination thereof:
- wherein X is a leaving group, R1 and R2 are, independently of one another, a C1-C8-alkyl, C1-C4-alkoxyethyl, C1-C4-alkyl-substituted C6-C10-aryl radical, alkyl substituted aryl, aryl substituted alkyl, nitro alkyl, hydroxyl alkyl, alkoxy alkyl, hydroxyl alkoxyalkyl, or R1 and R2 together form R in a six-membered ring, wherein the six membered ring has the general formula (3), (4) or combination thereof:
- wherein R is a linear or branched divalent alkylene group containing from 3 to about 9 carbon atoms.
The phosphorus containing flame retardant of 1, wherein the phosphorus containing flame retardant has a capping index such that the at least one first polyol has on average substantially all of its polyol OH sites capped by the at least one phosphorus containing compound.
Dependencies are inferred from the claim text.