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US 11,447,619 B2Granted
Thermoplastic elastomer composition
AssigneePolymax Tpe LLC
InventorsYun Martin Lu, Xin Zhang, Xiaofeng Zheng, Qianqian Li
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Abstract
A thermoplastic elastomer composition and method of making the thermoplastic elastomer are disclosed. The thermoplastic elastomer may comprise a polymer blend. The polymer bland may comprise a non-crosslinked elastomer, oil, polyethylene, and antioxidant. The oil may be from about 15 wt. % to about 50 wt. % oil. The polyethylene may be from about 3 wt. % to about 30 wt. %. The antioxidant may be from about 0 to about 0.5 wt. %.
Claims24
A thermoplastic elastomer composition, comprising,
- a polymer blend comprising a sole non-crosslinked elastomer, wherein the non-cross-linked elastomer comprises styrenic block copolymer is selected from a group consisting of styrene-butadiene-styrene polymer (SBS), styrene-ethylene butylene-styrene (SEBS), styrene-isoprene-styrene (SIS), styrene-isoprene-butadiene-styrene (SIBS), styrene-ethylene propylene-styrene (SEPS), styrene-ethylene propylene (SEP) block copolymer, styrene-ethylene ethylene propylene-styrene (SEEPS), hydrogenated polybutadiene, hydrogenated polyisoprene, hydrogenated styrene-isoprene random copolymer, poly (styrene-[(butadiene)1-x-(ethylene-co-butylene)x]-styrene), wherein x is the hydrogenated fraction of the molecule, and hydrogenated styrene-butylene random, wherein the non-crosslinked elastomer total molecular weight is from about 100,000 to about 440,000 g/mol;
- from about 25 wt. % to about 50 wt. % oil, wherein the oil comprises mineral oil, wherein the mineral oil comprises paraffinic oil;
- from about 3.0 wt. % to about 20 wt. % polyethylene, wherein the polyethylene comprises at least one of linear low density polyethylene (LLDPE) low density polyethylene (LDPE) or high density polyethylene (HDPE), wherein polyethylene has melt flow index of about 0.5 g/10 min to about 10.0 g/10 min, measured at 190° C., employing 2.15 kilogram (kg) weight;
- and
- from about 0 to about 0.5 wt. % anti-oxidant, wherein the thermoplastic elastomer composition has a weight percent ratio of non-crosslinked elastomer to oil from about 0.8:1 to about 1.1:1, wherein the thermoplastic elastomer composition exhibits compression set from about 30% to about 48%, measured at about 70° C. for about 22 hours per ASTM D359B, wherein the thermoplastic elastomer composition has a melt viscosity of 67 1/s of about 200 to about 2000 Pa·s, measured at 200° C.
2 more elements
A thermoplastic elastomer composition, comprising,
- a polymer blend comprising a styrenic block copolymer, wherein the styrenic block copolymer is selected from a group consisting of styrene-butadiene-styrene polymer (SBS), styrene-ethylene butylene-styrene (SEBS), styrene-isoprene-styrene (SIS), styrene-isoprene-butadiene-styrene (SIBS), styrene-ethylene propylene-styrene (SEPS), styrene-ethylene propylene (SEP) block copolymer, styrene-ethylene ethylene propylene-styrene (SEEPS), hydrogenated polybutadiene, hydrogenated polyisoprene, hydrogenated styrene-isoprene random copolymer, poly (styrene-[(butadiene)1-x-(ethylene-co-butylene)x]-styrene), wherein x is the hydrogenated fraction of the molecule, and hydrogenated styrene-butylene random, wherein the styrenic block copolymer total molecular weight is from about 100,000 to about 440,000 g/mol;
- from about 30 wt. % to about 50 wt. % oil, wherein the oil comprises mineral oil, wherein the mineral oil comprises paraffinic oil;
- from about 3.0 wt. % to about 20 wt. % polyethylene, wherein the polyethylene comprises at least one of linear low density polyethylene (LLDPE) low density polyethylene (LDPE) or high density polyethylene (HDPE), wherein polyethylene has melt flow index of about 0.5 g/10 min to about 10.0 g/10 min, measured at 190° C., employing 2.15 kilogram (kg) weight;
- and
- from about 0 to about 0.5 wt. % anti-oxidant, wherein the thermoplastic elastomer composition has a weight percent ratio of styrenic block copolymer to oil from about 0.8:1 to about 1.1:1, wherein the thermoplastic elastomer composition does not comprise thermoplastic vulcanizate or olefin block copolymer, wherein the thermoplastic elastomer composition exhibits compression set from about 30% to about 48%, measured at about 70° C. for about 22 hours per ASTM D359B, wherein the thermoplastic elastomer composition has a melt viscosity of 67 1/s of about 200 to about 2000 Pa·s, measured at 200° C.
2 more elements
Dependencies are inferred from the claim text.