Long chain branched syndiotactic vinyl aromatic polymers
First Claim
1. A long chain branched syndiotactic vinyl aromatic polymer, having a molecular weight of from 125,000 to 3,000,000, produced by polymerizing a vinyl aromatic monomer in the presence of from 10 to 1000 ppm of a multifunctional monomer having more than one olefinic functionality, based on the amount of vinyl aromatic monomer, under conditions sufficient to produce a syndiotactic vinyl aromatic polymer, wherein the long chain branched syndiotactic vinyl aromatic polymer contains extensions of at least 10 monomer repeating units of syndiotactic vinyl aromatic polymer chain attached to the polymer backbone.
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Abstract
Long chain branched syndiotactic vinyl aromatic polymers can be obtained by polymerizing the vinyl aromatic monomer in the presence of a small amount of a multifunctional monomer under conditions such that a syndiotactic vinyl aromatic polymer is produced.
6 Citations
14 Claims
- 1. A long chain branched syndiotactic vinyl aromatic polymer, having a molecular weight of from 125,000 to 3,000,000, produced by polymerizing a vinyl aromatic monomer in the presence of from 10 to 1000 ppm of a multifunctional monomer having more than one olefinic functionality, based on the amount of vinyl aromatic monomer, under conditions sufficient to produce a syndiotactic vinyl aromatic polymer, wherein the long chain branched syndiotactic vinyl aromatic polymer contains extensions of at least 10 monomer repeating units of syndiotactic vinyl aromatic polymer chain attached to the polymer backbone.
Specification