Product and method for making polyolefin polymer dispersions
AssigneeExxon Chemical Patents Inc.
InventorsSudhin Datta, Charles C. Cozewith, Bruce A. Harrington
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Abstract
This invention relates to polyolefin polymer dispersions having a semicrystalline plastic (SP) component and an amorphous elastomer (AE) component. The polymer dispersions of this invention are characterized by a continuous phase containing a discontinuous phase (dispersed phase) as seen by FIG. 2. Embodiments of this invention include either: 1) a discontinuous phase composed of the SP component dispersed within a continuous phase composed of the amorphous elastomer component and/or, 2) a discontinuous phase composed of the amorphous elastomer dispersed within a continuous phase composed of the SP component.
Claims18
A polymer dispersion essentially free of preformed or added compatibilizer comprising a substantially amorphous elastomer having a weight average MW of at least 20,000, and a semicrystalline plastic having a weight average MW of at least 20,000;
- wherein said polymer dispersion has a dispersed phase comprising said amorphous elastomer or said semicrystalline plastic;
- wherein said amorphous elastomer and said semicrystalline plastic are made from monomers selected from the group consisting of ethylene, C3-C30 higher alpha-olefins, a non-conjugated dienes, and combinations thereof;
- wherein neither said amorphous elastomer nor said semicrystalline plastic has more than 0.2 vinyl groups per chain;
- wherein said amorphous elastomer comprises 0-10 mol % diene;
- wherein said semicrystalline plastic comprises 0-10 mol % diene;
- and
- wherein said polymer dispersion has a value of factor A which is less than 1,
- wherein said factor A is defined as the ratio of the linear dimensions of the dispersed phase of said polymer dispersion to the average linear dimension of the dispersed phase of a corresponding physical blend.
Dependencies are inferred from the claim text.