US 11,760,868 B2 · Preparation method for a flame retardant polystyrene

Abstract

The present application relates to a field of a flame retardant polystyrene, and specifically discloses a preparation method for a flame retardant polystyrene. The preparation method for a flame retardant polystyrene includes the following steps: predissolving a brominated flame retardant containing a first active functional group in a reaction system of a styrene monomer to form a homogeneous solution; then, performing an end capping reaction by an olefin monomer containing a second active functional group to introduce a double bond at an end of the brominated flame retardant, so that it can be bonded to a polystyrene molecular chain by copolymerizing; performing a prepolymerization in a reactor to obtain a prepolymer; performing a post polymerization in the reactor or by extruding, to obtain a special material or a flame retardant masterbatch of the flame retardant polystyrene.

Claims9

Dependent claims

A preparation method for a flame retardant polystyrene, comprising the following steps:

step 1:
performing an end capping reaction by mixing a styrene monomer, a brominated flame retardant containing a first active functional group, and an olefin monomer containing a second active functional group;
and after the brominated flame retardant containing the first active functional group is dissolved, heating to 90° C.-140° C. while stirring to obtain a mixture containing the brominated flame retardant introduced with a double bond at an end;
step 2:
performing a prepolymerization by adding an initiator to the mixture obtained in step 1 to obtain a prepolymer;
and
step 3:
performing a copolymerization of the prepolymer to obtain the flame retardant polystyrene.

5 more elements

Dependencies are inferred from the claim text.

Preparation method for a flame retardant polystyrene

Life of this patent

Preparation method for a flame retardant polystyrene

Life of this patent

Abstract

Claims9