MICHAEL ADDITION CURING CHEMISTRIES FOR SULFUR-CONTAINING POLYMER COMPOSITIONS EMPLOYING BIS(SULFONYL)ALKANOLS

摘要

The use of Michael addition curing chemistries in compositions comprising sulfur-containing polymers such as polythioethers and polysulfides useful in aerospace sealant applications are disclosed. Sulfur-containing adducts comprising terminal Michael acceptor groups are also disclosed. In particular, sulfur-containing polymers and sulfur containing Michael acceptor adducts having terminal 1-(ethylenesulfonyl)-n-(vinylsulfonyl)alkanol groups are disclosed.

主权项

1. A polythioether Michael acceptor adduct comprising a polythioether Michael acceptor adduct of Formula (3), a polythioether Michael acceptor adduct of Formula (3a), or a combination thereof:
R6—S—R1—[—S—(CH2)p—O—(R2—O)m—(CH2)2—S—R1—]n—S—R6  (3) {R6—S—R1—[—S—(CH2)p—O—(R2—O)m—(CH2)2—S—R1—]n—S—V′—}zB  (3a) wherein:
R1 is —(CH2)2—O—(CH2)2—O—(CH2)2—;p is 2;R2 is —(CH2)2—;m is 2;n is an integer from 1 to 60;B represents a core of a z-valent, vinyl-terminated polyfunctionalizing agent B(—V)z wherein:
z is an integer from 3 to 6; andeach V is a group comprising a group reactive with thiol groups; andeach —V′— is derived from the reaction of —V with a thiol; andeach R6 is independently a moiety comprising a terminal 1-(ethylenesulfonyl)-n-(vinylsulfonyl)alkanol group.