Terminally modified diene-based polymer and method for producing the same
AssigneeToyo Tire Corporation
InventorTaiki Iwachi
Life of this patent
Estimating the term…
Abstract
Provided are a terminally modified diene-based polymer having excellent mechanical properties and also a method for producing the same. The terminally modified diene-based polymer is obtainable by allowing a diene-based polymer terminated with ketone or aldehyde groups to react with an aminophosphonic acid compound represented by general formula (1) or (2): wherein in formulas (1) and (2), R1 and R4 each represent a C1-10 alkanediyl group, R2 and R3 may be the same or different and each represent hydrogen, a C1-3 alkyl group, or a phenyl group, R5, R6, R8, and R9 may be the same or different and each represent hydrogen, a C1-3 alkyl group, or a phenyl group, and R7 represents hydrogen or a hydroxyl group.
Claims8
A terminally modified diene-based polymer obtained by allowing a diene-based polymer terminated with ketone or aldehyde groups to react with an aminophosphonic acid compound represented by general formula (1) or (2):
- wherein in formulas (1) and (2), R1 and R4 each represent a alkanediyl group, R2 and R3 may be the same or different and each represent hydrogen, a C1-3 alkyl group, or a phenyl group, R5, R6, R8, and R9 may be the same or different and each represent hydrogen, a C1-3 alkyl group, or a phenyl group, and R7 represents hydrogen or a hydroxyl group.
A method for producing a terminally modified diene-based polymer, comprising:
- an oxidative decomposition step of adding an oxidizing agent to a diene-based polymer to oxidatively cleave a carbon-carbon double bond, thereby giving an oxidatively decomposed diene-based polymer;
- and
- a terminal modification step of allowing the obtained oxidatively decomposed diene-based polymer to react with an aminophosphonic acid compound represented by general formula (1) or (2):
- wherein in formulas (1) and (2), R1 and R4 each represent a C1-10 alkanediyl group, R2 and R3 may be the same or different and each represent hydrogen, a C1-3 alkyl group, or a phenyl group, R5, R6, R8, and R9 may be the same or different and each represent hydrogen, a C1-3 alkyl group, or a phenyl group, and R7 represents hydrogen or a hydroxyl group.
Dependencies are inferred from the claim text.