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US 2003/0120012 A1Published application
Alpha olefin/vinyl or vinylidene aromatic interpolymer product and process for making same using multiple catalyst systems
AssigneeThe Dow Chemical Company
InventorsYunwa W. Cheung, Martin J. Guest, Robert K. Rosen, Brian W. Kolthammer
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Abstract
A process for making an interpolymer product that includes contacting at least one α-olefinic monomer and at least one vinyl or vinylidene monomer in the presence of at least a first single site catalyst and second single site catalyst in a reactor system, and effectuating the polymerization of the monomers in the reactor.
Claims21
An interpolymer product comprising an α-olefin interpolymerized with at least one vinyl or vinylidene aromatic monomer wherein the interpolymer product is characterized as having:
- A) a melting point, as determined using differential scanning calorimetry, equal to or greater than the product of the equation:
- melting point=128−1.3333×total weight percent interpolymerized vinyl and/or vinylidene aromatic monomer,
- or
- B) a glass transition temperature range or width at half peak temperature height of greater than or equal to 15° C., preferably greater than or equal to 20° C., more preferably greater than or equal to 25° C., most preferably greater than or equal to 30° C., as determined using dynamic mechanical spectroscopy (DMS) loss modulus (G″) data.
1 more element
A process for making an interpolymer product, comprising:
- a) contacting at least one α-olefinic monomer and at least one vinyl or vinylidene monomer in the presence of at least a first single site catalyst and second single site catalyst in a reactor system;
- b) effectuating the polymerization of the monomers in the reactor.
Dependencies are inferred from the claim text.