The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 17, 2015
Filed:
Jan. 30, 2012
Sergio Alberto Moctezuma Espiricueto, Altamira, MX;
Enrique María Montero Carnerero, Santander, ES;
Gabriel Hernández Zamora, Tampico, MX;
Alejandro Claudio Esquivel DE LA Garza, Madero, MX;
Martha Belem Mendieta García, Madero, MX;
Gabriela Elizabeth Blanco Reyes, Madero, MX;
Sergio Alberto Moctezuma Espiricueto, Altamira, MX;
Enrique María Montero Carnerero, Santander, ES;
Gabriel Hernández Zamora, Tampico, MX;
Alejandro Claudio Esquivel De la Garza, Madero, MX;
Martha Belem Mendieta García, Madero, MX;
Gabriela Elizabeth Blanco Reyes, Madero, MX;
Dynasol Elastómeros, S.A. de C.V., Altamira, MX;
Abstract
A tapered triblock copolymer having controlled vinyl distribution, enlarged middle block with intermediate composition and microstructure, increased compatibility between its adjacent blocks, good processing characteristics and a peak average molecular weight between 25,000 and 300,000 is made by anionically polymerizing conjugated diene and monovinyl aromatic monomers, polar modifier and initiator to make a first block rich in conjugated diene, forming a second block that is a copolymer of the conjugated diene and the monovinyl aromatic monomer and which is less rich in the conjugated diene than the first block, and forming a third block that is a homopolymer of the monovinyl aromatic monomer. The first, second and third blocks comprise 30 to 60, 20 to 50 wt % and 10 to 40 wt % of the tapered triblock copolymer, respectively. The tapered triblock copolymers may be used as asphalt modifiers, adhesives, sealants, compatibilizers, reinforcing agents and impact modifiers.