	US 12,460,082 B2
	Counter tapered thermoplastic elastomers
Sergio Alberto Moctezuma Espiricueto, Tampico (MX); Mariana Díaz Vejo, Santander (ES); Gabriela Elizabeth Blanco Reyes, Tampico (MX); Gabriel Hernández Zamora, Tampico (MX); Jesús Eduardo Ibarra Rodríguez, Tampico (MX); and Jessica Nolasco Santiago, Altamira (MX)
Assigned to Dynasol Elastómeros, S.A. de C.V., Altamira (MX)
Filed by Dynasol Elastómeros, S.A. de C.V., Altamira (MX)
Filed on Jun. 20, 2022, as Appl. No. 17/844,201.
Application 17/844,201 is a continuation in part of application No. 15/417,193, filed on Jan. 26, 2017, granted, now 11,370,873.
Prior Publication US 2022/0411637 A1, Dec. 29, 2022
Int. Cl. C08L 95/00 (2006.01); C08F 297/04 (2006.01); C09J 153/02 (2006.01)

CPC C08L 95/005 (2013.01) [C08L 2201/52 (2013.01); C08L 2207/04 (2013.01); C08L 2555/84 (2013.01)]

77 Claims

1. An asphalt and/or bituminous composition comprising:

(a) asphalt and/or bitumen; and

(b) a first counter tapered thermoplastic elastomer (first CTTE) composition, wherein the asphalt and/or bituminous composition includes from 0.5 to 25 percent weight of the first CTTE composition, and wherein the first CTTE composition comprises:

units of at least one monovinyl aromatic monomer A polymerized with units of at least one conjugated diene monomer B to form a counter tapered diblock A-[A/B] copolymer, wherein the A block comprises a polymer of the monovinyl aromatic monomer units, wherein the [A/B] block is a copolymer of the monovinyl aromatic monomer units and the conjugated diene monomer units, and wherein the [A/B] block is counter tapered such that the ratio of B to A is lower proximal to the A block relative to the ratio of B to A distal to the A block.