VIBRATION DAMPING THERMOPLASTIC ELASTOMER BLENDS
Embodiments of the present disclosure are directed to thermoplastic elastomer blends comprising at least one non-hydrogenated styrene isoprene block copolymer (SIS) having a Weight Average Molecular Weight (Mw) greater than or equal to 50,000 g/mol and a Tan Delta Peak Temperature greater than or equal to 15° C. and less than or equal to 25° C. at least one of: at least one hydrogenated SIS having an Mw greater than or equal to 75,000 g/mol and a Tan Delta Peak Temperature less than or equal to 20° C.; and a styrene-ethylene/butylene-styrene block copolymer (SEBS) having a Mw greater than or equal to 75,000 g/mol and a Tan Delta Peak Temperature less than or equal to 20° C.; and a tackifier having a softening point greater than or equal to 80° C.
1 . A thermoplastic elastomer blend comprising:
at least one non-hydrogenated styrene isoprene block copolymer (SIS) having a Weight Average Molecular Weight (Mw) greater than or equal to 50,000 g/mol and a Tan Delta Peak Temperature greater than or equal to 15° C. and less than or equal to 25° C.;
at least one of:
at least one hydrogenated SIS having an Mw greater than or equal to 75,000 g/mol and a Tan Delta Peak Temperature less than or equal to 20° C.;
a styrene-ethylene/butylene-styrene block copolymer (SEBS) having a Mw greater than or equal to 75,000 g/mol and a Tan Delta Peak Temperature less than or equal to 20° C.; and
a tackifier having a softening point greater than or equal to 80° C.
2 . The thermoplastic elastomer blend of claim 1 , wherein the thermoplastic elastomer blend comprises the at least one hydrogenated SIS.
3 . The thermoplastic elastomer blend of claim 1 , wherein the thermoplastic elastomer blend comprises the SEBS.
4 . The thermoplastic elastomer blend of claim 1 , wherein the hydrogenated SIS comprises a polyisoprene soft block; and wherein the polyisoprene soft block is a vinyl-polyisoprene soft block.
5 . (canceled)
6 . The thermoplastic elastomer blend of claim 1 , wherein the thermoplastic elastomer blend further comprises a styrene-isobutylene styrene block copolymer (SIBS) having a Mw greater than or equal to 50,000 g/mol and a Tan Delta Peak Temperature less than or equal to 20° C.
7 . The thermoplastic elastomer blend of claim 1 , wherein the thermoplastic elastomer blend further comprises a styrene-(ethylene/propylene)-styrene block copolymer (SEEPS) having a Mw greater than or equal to 100,000 g/mol and a Tan Delta Peak Temperature less than or equal to 20° C.
8 . The thermoplastic elastomer blend of claim 1 , wherein the Mw of the non-hydrogenated SIS greater than or equal to 75,000 g/mol; the Mw of the hydrogenated SIS is greater than or equal to 100,000 g/mol; and the Mw of the SEBS is greater than or equal to 100,000 g/mol.
9 . (canceled)
10 . (canceled)
11 . The thermoplastic elastomer blend of claim 1 , wherein the softening point of the tackifier is greater than or equal to 80° C. and less than or equal to 150° C.
12 . The thermoplastic elastomer blend of claim 1 , wherein the thermoplastic elastomer blend has a Tan Delta Peak temperature greater than or equal to 20° C.
13 . The thermoplastic elastomer blend of claim 1 , wherein the thermoplastic elastomer blend has a Tan Delta Peak Height greater than or equal to 0.55; and wherein the thermoplastic elastomer blend has a Tan Delta Peak Width greater than or equal to 55° C.
14 . (canceled)
15 . The thermoplastic elastomer blend of claim 1 , wherein a ratio by weight of the thermoplastic elastomer blend of the non-hydrogenated SIS to the hydrogenated SIS is from 1:1 to 4:1.
16 . (canceled)
17 . The thermoplastic elastomer blend of claim 1 , wherein a ratio by weight of the thermoplastic elastomer blend of the non-hydrogenated SIS to the SEBS is from 1:1 to 4:1.
18 . (canceled)
19 . The thermoplastic elastomer blend of claim 1 , wherein the thermoplastic elastomer blend comprises:
greater than or equal to 15 wt. % and less than or equal to 75 wt. % of the non-hydrogenated SIS;
greater than or equal to 5 wt. % and less than or equal to 50 wt. % of the hydrogenated SIS, and
greater than or equal to 1 wt. % and less than or equal to 40 wt. % of the tackifier.
20 . (canceled)
21 . The thermoplastic elastomer blend of claim 1 , wherein the thermoplastic elastomer blend comprises:
greater than or equal to 15 wt. % and less than or equal to 75 wt. % of the non-hydrogenated SIS;
greater than or equal to 1 wt. % and less than or equal to 20 wt. % of the SEBS, and
greater than or equal to 1 wt. % and less than or equal to 40 wt. % of the tackifier.
22 . (canceled)
23 . The thermoplastic elastomer blend of claim 1 , wherein
greater than or equal to 15 wt. % and less than or equal to 75 wt. % of the non-hydrogenated SIS;
greater than or equal to 10 wt. % and less than or equal to 40 wt. % of the hydrogenated SIS;
greater than or equal to 1 wt. % and less than or equal to 20 wt. % of the SEBS, and
greater than or equal to 1 wt. % and less than or equal to 40 wt. % of the tackifier.
24 . The thermoplastic elastomer blend of claim 1 , wherein the thermoplastic elastomer blend further comprises greater than 0 wt. % and less than or equal to 15 wt. % of high density polyethylene, polypropylene, or combinations thereof.
25 . The thermoplastic elastomer blend of claim 1 , wherein the thermoplastic elastomer blend further comprises greater than 0 wt. % and less than or equal to 25 wt. % of a plasticizer.
26 . The thermoplastic elastomer blend of claim 1 , wherein the thermoplastic elastomer blend further comprises greater than 0 wt. % and less than or equal to 15 wt. % of a filler.
27 . The thermoplastic elastomer blend of claim 1 , wherein the at least one non-hydrogenated SIS is cross-linked.
28 . A foam comprising the thermoplastic elastomer blend of claim 1 , and a foaming agent to form a foam and the foam comprises a density of less than or equal to 0.4 g/cm 3 .
29 . (canceled)