| 摘要 |
<p>A polythioether includes a structure having the formula I (see formula) wherein R1 denotes a divalent C2-6 n-alkyl, C3-6 branched alkyl, C6-8 cycloalkyl or -C6-10 alkylcycloalkyl group, -((-CH2-)p- X-(q -(CH2-)r-, -((-CH2_)p- X-(q -(-CH2-)r- in which at least one -CH2- unit is substituted with a methyl group, R2 denotes methylene, a divalent C2-6 n-alkyl, C2-6 branched alkyl, C6-8 cycloalkyl or C6-10 alkylcycloalkyl group, -((CH2-)p-X-(q -(-(CH2-)r-, or ((-CH2-)p-X-(q -(-CH2-)r- in which at least one -CH2- unit is substituted with a methyl group, X denotes one selected from the group consisting of O, S and -NR6, R6 denotes H or methyl, m is a rational number from 0 to 10, n is an integer from 1 to 60, p is an integer from 2 to 6, q is an integer from 0 to 5, and r is an integer from 2 to 10. The polythioether is a liquid at room temperature and pressure.</p> |
