Phosphazene compound containing ester group, preparation method and use thereof
AssigneeGuangdong Guangshan New Material Co., Ltd.
InventorQingchong PAN
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Abstract
The present invention relates to a phosphazene compound containing an ester group having a structure of formula (I). The present invention grafts ester groups to phosphazene compounds and makes terminal grafted hydroxyl and carboxyl groups reacted with polymer matrix, producing an improvement of flame retardancy and a reduction of dielectric constant at the same time when the phosphazene compound is introduced into polymer matrix. Since N and P atoms are directly bonded into the polymer matrix by a reaction rather than addition and combination means in the prior art, there is no reduced mechanical properties of the matrix due to the addition of flame retardants.
Claims13
A phosphazene compound-containing ester group, comprising a structure of formula (I):
- in formula (I), Y, Z1 and Z2 are inert nucleophilic groups;
- M is any one of phosphazene compounds or a combination of at least two of them;
- R′1 is —X—R′3—;
- R′2 is —X—R′4—;
- R′3 and R′4 are organic groups having two broken bonds;
- X is oxygen atom, nitrogen atom or sulfur atom;
- a is an integer greater than or equal to 1;
- b is an integer greater than or equal to 0;
- c is an integer greater than or equal to 0;
- d is an integer greater than or equal to 0;
- the sum of b and a is two times of the number of phosphorus atoms in M;
- the sum of c+2 is two times of the number of phosphorus atoms in M;
- the sum of d+2 is two times of the number of phosphorus atoms in M;
- m is an integer less than or equal to 10.
Dependencies are inferred from the claim text.