Plasticizer, composition, and tire
The present invention provides plasticizers, compositions, and tires which can vary tire performance in response to temperature changes. The present invention relates to a plasticizer for resins and/or elastomers, containing a group that changes hydrophilicity with changes in temperature.
1 . A tire, comprising a tire component comprising a composition comprising:
a polymer component; and
a plasticizer for at least one of resins or elastomers, the plasticizer comprising a group that changes hydrophilicity with changes in temperature,
wherein the amount of the plasticizer is 10 to 50 parts by mass per 100 parts by mass of the polymer component,
wherein the plasticizer is an oil, an ester plasticizer, or a liquid or solid resin, and a polymer that shows a lower critical solution temperature in water is introduced into the plasticizer such that the plasticizer is graft-bonded to the polymer that shows a lower critical solution temperature in water, and
wherein the polymer component is a diene rubber.
2 . The tire according to claim 1 ,
wherein the tire component is a tread.
3 . The tire according to claim 1 ,
wherein the group shows a lower critical solution temperature in water.
4 . The tire according to claim 1 ,
wherein the group is represented by the following formula (I):
wherein n represents an integer of 1 to 1000; and R 1 , R 2 , and R 3 each independently represent a hydrogen atom or a hydrocarbyl group, provided that at least one of R 1 or R 2 is not a hydrogen atom, and R 1 and R 2 together may form a ring structure.
5 . The tire according to claim 1 ,
wherein the group is poly (N-isopropylacrylamide).
6 . The tire according to claim 1 ,
wherein the solid resin is at least one resin which is solid at 25° C. selected from the group consisting of terpene resins (including rosin resins), styrene resins, C5 resins, C9 resins, C5/C9 resins, coumarone indene resins (including resins based on coumarone or indene alone), olefin resins, urethane resins, acrylic resins, p-t-butylphenol acetylene resins, and dicyclopentadiene resins (DCPD resins),
wherein the solid resin does not contain poly (N-isopropylacrylamide),
wherein the liquid resin is at least one resin which is liquid at 25° C. selected from the group consisting of terpene resins (including rosin resins), styrene resins, C5 resins, C9 resins, C5/C9 resins, coumarone indene resins (including resins based on coumarone or indene alone), olefin resins, urethane resins, acrylic resins, p-t-butylphenol acetylene resins, and dicyclopentadiene resins (DCPD resins), and
wherein the liquid resin does not contain poly (N-isopropylacrylamide).