Rubber composition, heterocycle-modified glycerin fatty acid ester, and production method for heterocycle-modified glycerin fatty acid ester
An object of the present invention is to provide a rubber composition having excellent processability, a heterocycle-modified glycerin fatty acid ester, and a production method for the heterocycle-modified glycerin fatty acid ester. The present invention includes: a rubber composition containing a rubber, silica, and a heterocycle-modified glycerin fatty acid ester, in which an epoxy group is modified with a heterocyclic compound having a heterocycle having at least one H—N< bond, where the heterocycle is at least one selected from the group consisting of a piperazine ring, a morpholine ring, and a thiomorpholine ring, and the heterocycle may have a substituent; the heterocycle-modified glycerin fatty acid ester; and a production method therefor.
1. A rubber composition comprising:
a rubber;
silica; and
a heterocycle-modified glycerin fatty acid ester, in which an epoxy group is modified with a heterocyclic compound having a heterocycle having at least one H—N<bond, wherein
the heterocycle is at least one selected from the group consisting of a piperazine ring, a morpholine ring, and a thiomorpholine ring; and
the heterocycle may have a substituent.
2. The rubber composition according to claim 1 , wherein the heterocycle-modified glycerin fatty acid ester has a group represented by Formula (I) below:
where X 1 represents at least one selected from the group consisting of a nitrogen atom, an oxygen atom, and a sulfur atom,
X 3 represents a hydrocarbon group, and n3 represents from 0 to 4,
in the case where X 1 is a nitrogen atom, n2 is 1, and X 2 represents a hydrogen atom or an organic group, and
in the case where X 1 is an oxygen atom or a sulfur atom, n2 represents 0.
3. The rubber composition according to claim 2 , wherein,
in Formula (I), X 1 is a nitrogen atom,
n2 is 1, and X 2 is at least one selected from the group consisting of a hydrogen atom, a sulfone-based protecting group, a carbamate-based protecting group, and Formula (I-1): —(R—O) n4 —H; and
in Formula (I-1), R each independently represents a divalent hydrocarbon group, and n4 represents from 1 to 10.
4. The rubber composition according to claim 2 , wherein, in Formula (I), X 1 is an oxygen atom or a sulfur atom, and n2 is 0.
5. The rubber composition according to claim 2 , wherein a fatty acid constituting the heterocycle-modified glycerin fatty acid ester has a group represented by Formula (I).