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US 8,912,282 B2Granted
Oil based blends of interpolymers of ethylene/alpha-olefins
AssigneeDow Global Technologies LLC
InventorsMahalia Soediono, Patricia Ansems Bancroft, Caroline Woelfle, Stephen M. Hoenig, Yunwa W. Cheung
Life of this patent
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Abstract
Polymer blends comprise at least one ethylene/α-olefin interpolymer and one or more oil. The oil can be an aromatic oil, napththenic oil, paraffinic oil or a combination thereof. The ethylene/α-olefin interpolymers are random block copolymers comprising at least a hard block and at least a soft block. The resulting blends can be used to make flexible molded articles.
Claims20
A polymer blend comprising:
- (i) an ethylene/α-olefin block interpolymer, wherein the ethylene/α-olefin block interpolymer:
- (a) has a Mw/Mn from about 1.7 to about 3.5, at least one melting point, Tm, in degrees Celsius, and a density, d, in grams/cubic centimeter, wherein the numerical values of Tm and d correspond to the relationship:
- Tm≧−2002.9+4538.5(d)−2422.2(d)2;
- or
- (b) has a Mw/Mn from about 1.7 to about 3.5, and is characterized by a heat of fusion, ΔT in J/g, and a delta quantity, ΔT, in degrees Celsius defined as the temperature difference between the tallest DSC peak and the tallest CRYSTAF peak, wherein the numerical values of ΔT and ΔH have the following relationships:
- ΔT>−0.1299(ΔH)+62.81 for ΔH greater than zero and up to 130 J/g,
- ΔT 48° C. for ΔH greater than 130 J/g,
- wherein the CRYSTAF peak is determined using at least 5 percent of the cumulative polymer, and if less than 5 percent of the polymer has an identifiable CRYSTAF peak, then the CRYSTAF temperature is 30° C.;
- or
- (c) is characterized by an elastic recovery, Re, in percent at 300 percent strain and 1 cycle measured with a compression-molded film of the ethylene/α-olefin interpolymer, and has a density, d, in grams/cubic centimeter, wherein the numerical values of Re and d satisfy the following relationship when the ethylene/α-olefin interpolymer is substantially free of a cross-linked phase:
- Re>1481−1629(d);
- or
- (d) has a molecular fraction which elutes between 40° C. and 130° C. when fractionated using TREF, characterized in that the fraction has a molar comonomer content, of at least 5 percent higher than that of a comparable random ethylene interpolymer fraction eluting between the same temperatures, wherein said comparable random ethylene interpolymer has the same comonomer(s) and has a melt index, density, and molar comonomer content (based on the whole polymer) within 10 percent of that of the ethylene/α-olefin interpolymer;
- or
- (e) is characterized by a storage modulus at 25° C., G′(25° C.), and a storage modulus at 100° C., G′(100° C.), wherein the ratio of G′(25° C.) to G′(100° C.) is from about 1:1 to about 10:1;
- (ii) an oil;
- and
- (iii) a polyolefin.
15 more elements
A polymer blend comprising:
- (i) an ethylene/α-olefin block interpolymer, wherein the ethylene/α-olefin block interpolymer:
- (a) has a Mw/Mn from about 1.7 to about 3.5, at least one melting point, Tm, in degrees Celsius, and a density, d, in grams/cubic centimeter, wherein the numerical values of Tm and d correspond to the relationship:
- Tm≧−2002.9+4538.5(d)−2422.2(d)2;
- or
- (b) has a Mw/Mn from about 1.7 to about 3.5, and is characterized by a heat of fusion, ΔT in J/g, and a delta quantity, ΔT, in degrees Celsius defined as the temperature difference between the tallest DSC peak and the tallest CRYSTAF peak, wherein the numerical values of ΔT and ΔH have the following relationships:
- ΔT>−0.1299(ΔH)+62.81 for ΔH greater than zero and up to 130 J/g,
- ΔT 48° C. for ΔH greater than 130 J/g,
- wherein the CRYSTAF peak is determined using at least 5 percent of the cumulative polymer, and if less than 5 percent of the polymer has an identifiable CRYSTAF peak, then the CRYSTAF temperature is 30° C.;
- or
- (c) is characterized by an elastic recovery, Re, in percent at 300 percent strain and 1 cycle measured with a compression-molded film of the ethylene/α-olefin interpolymer, and has a density, d, in grams/cubic centimeter, wherein the numerical values of Re and d satisfy the following relationship when the ethylene/α-olefin interpolymer is substantially free of a cross-linked phase:
- Re>1481−1629(d);
- or
- (d) has a molecular fraction which elutes between 40° C. and 130° C. when fractionated using TREF, characterized in that the fraction has a molar comonomer content, of at least 5 percent higher than that of a comparable random ethylene interpolymer fraction eluting between the same temperatures, wherein said comparable random ethylene interpolymer has the same comonomer(s) and has a melt index, density, and molar comonomer content (based on the whole polymer) within 10 percent of that of the ethylene/α-olefin interpolymer;
- or
- (e) is characterized by a storage modulus at 25° C., G′(25° C.), and a storage modulus at 100° C., G′(100° C.), wherein the ratio of G′(25° C.) to G′(100° C.) is from about 1:1 to about 10:1;
- (ii) an oil;
- and
- (iii) a filler selected from the group consisting of silica, glass, and fumed silica.
15 more elements
A polymer blend comprising:
- (i) an ethylene/α-olefin block interpolymer, wherein the ethylene/α-olefin block interpolymer:
- (a) has a Mw/Mn from about 1.7 to about 3.5, at least one melting point, Tm, in degrees Celsius, and a density, d, in grams/cubic centimeter, wherein the numerical values of Tm and d correspond to the relationship:
- Tm≧−2002.9+4538.5(d)−2422.2(d)2;
- or
- (b) has a Mw/Mn from about 1.7 to about 3.5, and is characterized by a heat of fusion, ΔT in J/g, and a delta quantity, ΔT, in degrees Celsius defined as the temperature difference between the tallest DSC peak and the tallest CRYSTAF peak, wherein the numerical values of ΔT and ΔH have the following relationships:
- ΔT>−0.1299(ΔH)+62.81 for ΔH greater than zero and up to 130 J/g,
- ΔT 48° C. for ΔH greater than 130 J/g,
- wherein the CRYSTAF peak is determined using at least 5percent of the cumulative polymer, and if less than 5 percent of the polymer has an identifiable CRYSTAF peak, then the CRYSTAF temperature is 30° C.;
- or
- (c) is characterized by an elastic recovery, Re, in percent at 300 percent strain and 1 cycle measured with a compression-molded film of the ethylene/α-olefin interpolymer, and has a density, d, in grams/cubic centimeter, wherein the numerical values of Re and d satisfy the following relationship when the ethylene/α-olefin interpolymer is substantially free of a cross-linked phase:
- Re>1481−1629(d);
- or
- (d) has a molecular fraction which elutes between 40° C. and 130° C. when fractionated using TREF, characterized in that the fraction has a molar comonomer content, of at least 5 percent higher than that of a comparable random ethylene interpolymer fraction eluting between the same temperatures, wherein said comparable random ethylene interpolymer has the same comonomer(s) and has a melt index, density, and molar comonomer content (based on the whole polymer) within 10 percent of that of the ethylene/α-olefin interpolymer;
- or
- (e) is characterized by a storage modulus at 25° C., G′(25° C.), and a storage modulus at 100° C., G′(100° C.), wherein the ratio of G′(25° C.) to G′(100° C.) is from about 1:1 to about 10:1;
- (ii) an oil;
- and
- (iii) a lubricant comprising a wax.
15 more elements
Dependencies are inferred from the claim text.