| 主权项 |
1. A polythioether comprising:
(a) a backbone comprising a structure of formula (I):
—R1-[-S—(CH2)2—O-[-R2—O-]m-(CH2)2—S—R1]n— (I) wherein:
(i) each R1 is independently selected from a C2-10 n-alkylene group, a C2-6 branched alkylene group, a C6-8 cycloalkylene group, a C6-10 alkylcycloalkylene group, a heterocyclic group, a -[(-CH2-)p-X-]q-(CH2)r— group, and a -[(-CH2-)p-X-]q-(CH2)r— group in which at least one —CH2— unit is substituted with a methyl group;(ii) each R2 is independently selected from a C2-10 n-alkylene group, a C2-6 branched alkylene group, a C6-8 cycloalkylene group, a C6-14 alkylcycloalkylene group, a heterocyclic group, and a -[(-CH2-)p-X-]q-(CH2)r- group;(iii) each X is independently selected from O, S, and a —NR6— group, in which R6 is selected from H and a methyl group;(iv) m ranges from 1 to 50;(v) n is an integer ranging from 1 to 60;(vi) p is an integer ranging from 2 to 6;(vii) q is an integer ranging from 1 to 5; and(viii) r is an integer ranging from 2 to 10; and (b) at least two groups, per molecule, having the formula: wherein R3, R4, and R5 are each independently selected from a C1-6 n-alkyl group, a C1-6 branched alkyl group, a substituted C1-6 n-alkyl group, and a phenyl group. |
