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US 9,518,137 B2Granted
Ethylene propylene-diene interpolymer composition
AssigneeDow Global Technologies LLC
InventorsBrian W. Walther, Susan M. Song, Paul J. Caronia, Lin Fu
Life of this patent
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Abstract
The present disclosure is directed to a composition and articles containing the composition. The composition includes an ethylene-propylene-diene interpolymer (EPDM) having a rheology ratio greater than 33. The EPDM also has a molecular weight distribution greater than 3.0. The composition has a dissipation factor less than or equal to 0.01 radians as measured in accordance with ASTM D 150 (130° C., 60 Hz).
Claims18
A composition comprising:
- an ethylene-propylene-diene interpolymer with from 0.1 wt % to 1.0 wt % units derived from diene, the interpolymer having a rheology ratio greater than 33;
- and a molecular weight distribution greater than 3.0;
- the composition having a dissipation factor less than or equal to 0.01 radians as measured in accordance with ASTM D 150 at a temperature of 130° C., and a frequency of 60 Hz after one week of vacuum oven heating at 60° C.
A composition comprising:
- an ethylene-propylene-diene interpolymer comprising
- (i) from 60 wt % to 75 wt % units derived from ethylene;
- (ii) from 15 wt % to 30 wt % units derived from propylene;
- (iii) from 0.1 wt % to 1.0 wt % units derived from diene;
- and
- (iv) from 1.0 ppm to less than 3.5 ppm aluminum;
- and from 0.1 ppm to less than 0.3 ppm zirconium
- wherein the ethylene-propylene-diene interpolymer has
- a rheology ratio greater than 33;
- a dissipation factor less than or equal to 0.01 radians as measured in accordance
- with ASTM D 150 at a temperature of 130° C. and a frequency of 60 Hz after one week of vacuum oven heating at 60° C.;
- and
- a molecular weight distribution greater than 3.0;
- and
- the composition has a dissipation factor less than or equal to 0.01 radians after one week as measured in accordance with ASTM D 150 at a temperature of 130° C., and a frequency of 60 Hz.
12 more elements
Dependencies are inferred from the claim text.