US 10,400,173 B2 · Siloxane-modified cyclotriphosphazene halogen-free flame retardant, preparation process and use thereof

Abstract

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.

Claims22

Dependent claims

A siloxane-modified cyclotriphosphazene halogen-free flame retardant, wherein the flame retardant has the structural formula as shown in Formula I:

wherein the groups of X1-X6 are each independently selected from
or —O—R′, and at least two groups therein are
R1 is a substituted or unsubstituted arylene:
R2 is selected from the group consisting of methenyl,
wherein Ra is a substituted or unsubstituted C1-C5 alkyl group;
Rb is a substituted or unsubstituted aryl group;
R3 is a group containing aryl phosphorus oxygen structure;
Rs in the groups of X1-X6 is independently selected from siloxane group or hydrogen, and Rs in the groups of X1-X6 are not hydrogen at the same time;
R′ is a substituted or unsubstituted aryl group.

6 more elements

Dependencies are inferred from the claim text.

Siloxane-modified cyclotriphosphazene halogen-free flame retardant, preparation process and use thereof

Life of this patent

Siloxane-modified cyclotriphosphazene halogen-free flame retardant, preparation process and use thereof

Life of this patent

Abstract

Claims22