| 主权项 |
1. A composition comprising:
a Michael acceptor-terminated sulfur-containing prepolymer, wherein the Michael acceptor-terminated sulfur-containing prepolymer comprises a Michael acceptor-terminated polythioether prepolymer of Formula (11a), a Michael acceptor-terminated polythioether prepolymer of Formula (11b), or a combination thereof:
R6—S—R1—[—S—(CH2)p—O—(R2—O)m—(CH2)2—S—R1—]n—S—R6 (11a){R6—S—R1—[—S—(CH2)p—O—(R2—O)m—(CH2)2—S—R1—]n—S—V′—}zB (11b) wherein:
each R1 independently is selected from C2-10 alkanediyl, C6-8 cycloalkanediyl, C6-10 alkanecycloalkanediyl, C5-8 heterocycloalkanediyl, and —[(—CHR3—)s—X—]q—(—CHR3—)r—, wherein:
s is an integer from 2 to 6;q is an integer from 1 to 5;r is an integer from 2 to 10;each R3 is independently selected from hydrogen and methyl; andeach X is independently selected from —O—, —S—, —NH—, and —N(—CH3)—;each R2 is independently selected from C1-10 alkanediyl, C6-8 cycloalkanediyl, C6-14 alkanecycloalkanediyl, and —[(—CHR3—)s—X—]q—(—CHR3—)r—, wherein s, q, r, R3, and X are as defined for R1;m is an integer from 0 to 50;n is an integer from 1 to 60;p is an integer from 2 to 6;B represents a core of a z-valent, polyfunctionalizing agent B(—V)z wherein:
z is an integer from 3 to 6; andeach V is a group comprising a terminal group reactive with a thiol group; andeach —V′— is derived from the reaction of —V with a thiol; andeach R6 independently has the structure of Formula (13a):
—CH2—CH2—S(O)2—R10—CH(—OH)—R10—S(O)2—CH═CH2 (13a)wherein each R10 is independently selected from C1-3 alkanediyl; a thiol-terminated sulfur-containing prepolymer, wherein the thiol-terminated sulfur-containing prepolymer comprises a thiol-terminated polythioether selected from a thiol-terminated polythioether polymer of Formula (7a), a thiol-terminated polythioether polymer of Formula (7b), or a combination thereof:
HS—R1—[—S—(CH2)p—O—(R2—O)m—(CH2)2—S—R1—]n—SH (7a){HS—R1—[—S—(CH2)p—O—(R2—O)m—(CH2)2—S—R1—]n—S—V′—}zB (7b) wherein:
each R1 independently is selected from C2-10 alkanediyl, C6-8 cycloalkanediyl, C6-14 alkanecycloalkanediyl, C5-8 heterocycloalkanediyl, and —[(—CHR3—)s—X—]q—(—CHR3—)r—, wherein:
s is an integer from 2 to 6;q is an integer from 1 to 5;r is an integer from 2 to 10;each R3 is independently selected from hydrogen and methyl; andeach X is independently selected from —O—, —S—, —NH—, and —N(—CH3)—; each R2 is independently selected from C1-10 alkanediyl, C6-8 cycloalkanediyl, C6-14 alkanecycloalkanediyl, and —[(—CHR3—)s—X—]q—(—CHR3—)r—, wherein s, q, r, R3, and X are as defined for R1;
m is an integer from 0 to 50;n is an integer from 1 to 60;p is an integer from 2 to 6;B represents a core of a z-valent, polyfunctionalizing agent B(—V)z wherein:
z is an integer from 3 to 6; andeach —V is a group comprising a terminal group reactive with thiol groups; andeach —V′— is derived from the reaction of —V with a thiol; and a phosphine catalyst. |
