Hybrid organosilicon thermoplastic elastomer and preparation method therefor

1. A hybrid organic silicon thermoplastic elastomer, characterized by having a structural formula as shown in formula I:

wherein,

m is a positive integer in the scope of 4˜100;

n is a positive integer in the scope of 4˜100;

h is a positive integer in the scope of 1˜40;

k is a positive integer in the scope of 0˜40;

l is a positive integer in the scope of 0˜40;

R 1 ˜R 4 are identical or different alkane, olefin and aromatic radicals containing 1˜10 carbon atoms;

R 5 ·R 14 are H or

radicals, and R 5 ˜R 14 are not all H;

R 15 is at least one of a linear or branched polymer containing 1˜100 carbon atoms and a linear or branched organic silicon polymer containing 2˜100 silicon atoms;

X is alkylene, arylidene, alkylene aryl or arylidene alkyl with 1˜10 carbon atoms;

Z is alkylene, arylidene, alkylene aryl or arylidene alkyl with 1˜10 carbon atoms;

Y 1 is alkylene, arylidene, alkylene aryl or arylidene alkyl with 1˜20 carbon atoms;

Y 2 is alkylene, arylidene, alkylene aryl or arylidene alkyl with 1˜20 carbon atoms;

and Y 3 is alkylene, arylidene, alkylene aryl or arylidene alkyl with 1˜20 carbon atoms.

2. The hybrid organic silicon thermoplastic elastomer according to claim 1 , characterized in that, Y 1 is any one of 2,6-toluylene, 4,4′-methylene diphenylene, 3,3′-dimethoxy-4,4′-biphenylene, tetramethyl-m-diphenyl, 4,4′-methylene dicyclohexylidene, 3,5,5-trimethyl-3-methylene cyclohexylidene, 1,6-hexylidene, 1,4-cyclohexylidene and 2,2,4-trimethylhexylidene; Y 2 is any one of 2,6-toluylene, 4,4′-methylene diphenylene, 3,3′-dimethoxy-4,4′ -biphenylene, tetramethyl-m-diphenyl, 4,4′-methylene dicyclohexylidene, 3,5,5-trimethyl-3-methylene cyclohexylidene, 1,6-hexylidene, 1,4-cyclohexylidene and 2,2,4-trimethylhexylidene;; and Y 3 is any one of 2,6-toluylene, 4,4′-methylene diphenylene, 3,3′-dimethoxy-4,4′-biphenylene, tetramethyl-m-diphenyl, 4,4′-methylene dicyclohexylidene, 3,5,5-trimethyl-3-methylene cyclohexylidene, 1,6-hexylidene, 1,4-cyclohexylidene and 2,2,4-trimethylhexylidene.

3. A preparation method of a hybrid organic silicon thermoplastic elastomer, characterized in that, a main body polymer system formed by organopolysiloxane with two functionalized ends, a compound with a structural formula of CN—Y—NCO, a branched compound with a structural formula of

and a compound with a structural formula of NH 2 —Z—NH 2 , which be added or not, performs a condensation reaction;

wherein, the organopolysiloxane with two functionalized ends is organopolysiloxane with two amino-ends or a mixture of the organopolysiloxane with two amino-ends and organopolysiloxane with two hydroxy-ends;

in the compound with a structural formula of OCN—Y—NCO, Y is alkylene, arylidene, alkylene aryl or arylidene alkyl with 1˜10 carbon atoms;

in a branched compound with a structural formula of

R is at least one of a linear or branched polymer containing 1˜100 carbon atoms and a linear or branched organic silicon polymer containing 2˜100 silicon atoms;

and in the compound with a structural formula of NH 2 —Z—NH 2 , Z is alkylene, arylidene, alkylene aryl or arylidene alkyl with 1˜10 carbon atoms.

4. The preparation method of the hybrid organic silicon thermoplastic elastomer according to claim 3 , characterized in that, the main body polymer system is added with an organic solvent, and the organic solvent can fully dissolve and mix the organopolysiloxane, the compound with a structural formula of OCN—Y—NCO, the branched compound with a structural compound of

and the compound with a structural formula of NH 2 —Z—NH 2 .

5. The preparation method of the hybrid organic silicon thermoplastic elastomer according to claim 3 , characterized in that, the organopolysiloxane with two functionalized ends has a polymerization degree of 4˜100.

6. The preparation method of the hybrid organic silicon thermoplastic elastomer according to claim 3 , characterized in that, the compound with the structural formula of OCN—Y—NCO is at least one of toluene diisocyanate, benzhydryl-4,4′-diisocyanate, hexamethylene diisocyanate, sophorone diisocyanate, xylylene diisocyanate, 4,4′-cyclohexylmethane diisocyanate, phenylene diisocyanate and isomers thereof, and halogen substituted benzhydryl-4,4′-diisocyanate.

7. The preparation method of the hybrid organic silicon thermoplastic elastomer according to claim 3 , characterized in that, the organic silicon polymer of the branched compound with a structural formula of

is one of polymethylsiloxane, polyphenylsiloxane, polymethylphenyl siloxane or polymethylvinylsiloxane with a silicon atom number of 2˜80.

8. The preparation method of the hybrid organic silicon thermoplastic elastomer according to claim 3 , characterized in that, mass ratio of the compound with a structural formula of OCN—Y—NCO to the organopolysiloxane with two functionalized ends is 0.01˜0.4; the mass ratio of the branched compound with a structural formula of

to the organopolysiloxane with two functionalized ends is 0.001˜0.15.

9. The preparation method of the hybrid organic silicon thermoplastic elastomer according to claim 3 , characterized in that, compound with a structural formula of NH 2 —Z—NH 2 is at least one of ethane diamine, propane diamine, butane diamine, pentamethylene diamine, hexamethylenediamine, p-phenylenediamine, m-phenylenediamine and o-phenylenediamine.

10. The preparation method of the hybrid organic silicon thermoplastic elastomer according to claim 3 , characterized in that, mass ratio of the compound with a structural formula of NH 2 —Z—NH 2 to the organopolysiloxane with two functionalized ends is 0˜0.15.