The present invention provides a siloxane-modified cyclotriphosphazene halogen-free flame retardant, and a preparation method and a use thereof. The siloxane-modified cyclotriphosphazene halogen-free flame retardant has the structural formula as shown in Formula I. In the siloxane-modified cyclotriphosphazene halogen-free flame retardant of the present invention, three kinds of structures of siloxane, aryl phosphorus oxygen compound and cyclotriphosphazene are built in one molecular formula, which combines the advantages of three structures, improves the compatibility between the flame retardant and resins, has a high flame retardant efficiency and a better char formation and can greatly increase the flame retardancy and stability of resin cured products.

A compound of the formula (1), and lubricant, and magnetic disk each using the same
A-OCH.sub.2RfCH.sub.2B(1)
wherein A is a group of the formula (a) below, B is a group of the formula (b) or (c) or (d) below, p is 0, 1 or 2, q is a real number of 2 to 10, R is C.sub.1-4 fluoroalkyl, Ar is unsubstituted or substituted aromatic group with C.sub.1-30 alkyl or C.sub.1-30 alkoxyl, Rf is CF.sub.2CF.sub.2O(CF.sub.2CF.sub.2CF.sub.2O).sub.xCF.sub.2CF.sub.2 or CF.sub.2CF.sub.2CF.sub.2O(CF.sub.2CF.sub.2CF.sub.2CF.sub.2O).sub.yCF.sub.2CF.sub.2CF.sub.2, x and y are each a real number of 0 to 50. ##STR00001##

A compound of the formula (1), and lubricant, and magnetic disk each using the same
A-OCH.sub.2RfCH.sub.2B(1)
wherein A is a group of the formula (a) below, B is a group of the formula (b) or (c) or (d) below, p is 0, 1 or 2, q is a real number of 2 to 10, R is C.sub.1-4 fluoroalkyl, Ar is unsubstituted or substituted aromatic group with C.sub.1-30 alkyl or C.sub.1-30 alkoxyl, Rf is CF.sub.2CF.sub.2O(CF.sub.2CF.sub.2CF.sub.2O).sub.xCF.sub.2CF.sub.2 or CF.sub.2CF.sub.2CF.sub.2O(CF.sub.2CF.sub.2CF.sub.2CF.sub.2O).sub.yCF.sub.2CF.sub.2CF.sub.2, x and y are each a real number of 0 to 50. ##STR00001##

The phosphazene covalent organic framework (COF) is a material with high efficiency to improve the removal of iodine from nuclear waste. The COF can be obtained by a solvothermal reaction of hexa(4-formyl-phenoxy)cyclotriphosphazene and 1,3,6,8-tetra(aminophenyl)pyrene. The resulting three-dimensional phosphazene COF has iodine uptakes as high as 9.4 g g.sup.1 due to its 3D framework with higher specific surface areas and interconnected channels.

The phosphazene covalent organic framework (COF) is a material with high efficiency to improve the removal of iodine from nuclear waste. The COF can be obtained by a solvothermal reaction of hexa(4-formyl-phenoxy)cyclotriphosphazene and 1,3,6,8-tetra(aminophenyl)pyrene. The resulting three-dimensional phosphazene COF has iodine uptakes as high as 9.4 g g.sup.1 due to its 3D framework with higher specific surface areas and interconnected channels.

The present invention relates to a phosphazene compound comprising cyano group having a molecular structure of Formula (I); wherein, Y and Y are independently selected from organic groups; M.sub.1 and M.sub.2 are independently selected from phosphazene groups, and M.sub.1 contains m.sub.1 phosphorus atoms, and M.sub.2 contains m.sub.2 phosphorus atoms; X.sub.1, X.sub.1, X.sub.2, X.sub.3 and X.sub.4 are independently selected from any one of the sixth main-group elements; R and R are independently selected from divalent organic groups; a is an integer greater than or equal to 0; b is an integer greater than or equal to 1; and c is an integer greater than or equal to 0; and a+b=2m.sub.1, d+2=2m.sub.2. The present invention achieves a synergistic effect with P and N of phosphazene group by introducing cyano group to the phosphazene group, and thus improves thermal stability and flame retardancy of the phosphazene compound, and the compatibility thereof with other components is excellent. The resin composition comprising the phosphazene compound of the present invention has good heat resistance, water resistance, adhesive properties and mechanical properties, and thus the application thereof is widened.

The present invention relates to a phosphazene compound comprising cyano group having a molecular structure of Formula (I); wherein, Y and Y are independently selected from organic groups; M.sub.1 and M.sub.2 are independently selected from phosphazene groups, and M.sub.1 contains m.sub.1 phosphorus atoms, and M.sub.2 contains m.sub.2 phosphorus atoms; X.sub.1, X.sub.1, X.sub.2, X.sub.3 and X.sub.4 are independently selected from any one of the sixth main-group elements; R and R are independently selected from divalent organic groups; a is an integer greater than or equal to 0; b is an integer greater than or equal to 1; and c is an integer greater than or equal to 0; and a+b=2m.sub.1, d+2=2m.sub.2. The present invention achieves a synergistic effect with P and N of phosphazene group by introducing cyano group to the phosphazene group, and thus improves thermal stability and flame retardancy of the phosphazene compound, and the compatibility thereof with other components is excellent. The resin composition comprising the phosphazene compound of the present invention has good heat resistance, water resistance, adhesive properties and mechanical properties, and thus the application thereof is widened.

The present invention relates to a phosphazene compound and a prepreg and a composite metal laminate. The phosphazene compound has a structure as shown in Formula (I). The present invention obtains a phosphazene compound using an M group having specific components. The composite metal laminates prepared by the epoxy resin composition comprising the phosphazene compound have low dielectric properties, good heat resistance and mechanical properties and is a low dielectric material also having great economic properties and being environmental friendly.

The present invention relates to a phosphazene compound and a prepreg and a composite metal laminate. The phosphazene compound has a structure as shown in Formula (I). The present invention obtains a phosphazene compound using an M group having specific components. The composite metal laminates prepared by the epoxy resin composition comprising the phosphazene compound have low dielectric properties, good heat resistance and mechanical properties and is a low dielectric material also having great economic properties and being environmental friendly.

The present invention relates to a phosphazene compound and a composite metal laminate. The phosphazene compound with a partial structure of carboxylic esters has a structure as shown in Formula (I). The present invention obtains a phosphazene compound with a partial structure of carboxylic esters using an M group having specific components. The cured products of the phosphazene compound have good flame retardancy, heat resistance, mechanical properties, flame retardancy, and low dielectric constant, and are a low dielectric flame retardant material having great economic properties and being environmental friendly.