Phosphorous flame retardant including nsp
AssigneeNational Taiwan University
InventorsJiang-Jen Lin, Ying-Nan Chan, Jau-Yu Chiou
Life of this patent
Estimating the term…
Abstract
A phosphorous flame retardant including nanosilicate platelets (NSP) is made by first reacting hexachlorotriphosphazene (HCP) with poly(oxyalkylene)amine, then mixing the HCP product with nano silicate platelets (NSP) to obtain the phosphorous flame retardant including NSP. The phosphorous flame retardant can be further applied to an epoxy resin as a curing agent.
Claims10
A method for producing a phosphorous flame retardant including NSP, comprising steps of:
- (a) mixing hexachlorocyclotriphosphazene (HCP), alkaline and poly(oxyalkylene)amine in a first solvent to perform a replacement reaction so that at least one chlorine of HCP is replaced with poly(oxyalkylene)amine to form HCP-poly(oxyalkylene)amine, wherein poly(oxyalkylene)amine includes at least two end amino groups (—NH2), the molar ratio of HCP to poly(oxyalkylene)amine ranges from 1/1 to 1/12, and the replacement reaction is performed at a temperature from 35° C. to 85° C.;
- (b) mixing the HCP-poly(oxyalkylene)amine of step (a) and nanosilicate platelets (NSP) in a second solvent to produce the phosphorous flame retardant including NSP (HCP-poly(oxyalkylene)amine/NSP), wherein the NSP is in the form of individual platelets or layers exfoliated from layered clay and the weight ratio of HCP-poly(oxyalkylene)amine to NSP ranges from 1/20 to 10/1.
A phosphorous flame retardant including NSP, comprising HCP-poly(oxyalkylene)amine and nanosilicate platelets (NSP) in a weight ratio of 1/20 to 10/1;
- wherein HCP-poly(oxyalkylene)amine is hexachlorocyclotriphosphazene (HCP) having at least one chlorine substituted with poly(oxyalkylene)amine which includes at least two end amino groups (—NH2), and the NSP is in the form of individual platelets or layers exfoliated from layered clay.
A flame retardant resin, comprising the phosphorous NSP flame retardant of claim 10 and epoxy, wherein the end amino groups (—NH2) of poly(oxyalkylene)amine crosslink with epoxy, and the phosphorous NSP flame retardant is present in an amount of 0.1 to 50 wt % in the flame retardant resin.
Dependencies are inferred from the claim text.