The present invention is directed to a free radical control agent of the structural formula:
wherein R
1
is a divalent alkyl group of 1 to 12 carbon atoms, R
2
and R
3
are each independently hydrogen or an alkyl group of 1 to 12 carbon atoms, and R
4
is —OH or —COOH, with the proviso that the total carbon atoms of R
1
, R
2
, and R
3
is no greater than 12; and wherein Y represents a functional group that is capable of activating a vinylic carbon toward free radical addition.
The present invention relates to a process for preparing hydroxylated rubber by reacting (a) a rubber having from about 5 to about 75 percent of a 1,2-double bond content with (b) a mercaptan of the formula:
wherein n is an integer of from 3 to 19; and wherein the reaction is conducted in the solid state and is catalyzed by a free radical catalyst.
本发明涉及一种制备羟基化橡胶的工艺,该工艺是将(a)1,2-双键含量为 5%至 75%的橡胶与(b)式硫醇反应:
其中 n 为 3 至 19 的整数;反应在固态下进行,并由自由基催化剂催化。
Hydroxylgruppenhaltige Lösungskautschuke
申请人:Bayer Aktiengesellschaft
公开号:EP0974616A1
公开(公告)日:2000-01-26
Die Erfindung betrifft Kautschukmischungen enthaltend einen oder mehrere hydroxylgruppenhaltige in Lösung polymerisierte Kautschuke aufgebaut aus Diolefinen und vinylaromatischen Monomeren, gekennzeichnet dadurch, daß der oder die hydroxylgruppenhaltigen in Lösung polymerisierten Kautschuke im Bereich von 0,1 bis 5 Gew.-% gebundene Hydroxylgruppen enthält, ein Verfahren zu deren Herstellung, sowie deren Verwendung zur Herstellung von Formkörpern aller Art.
The present invention is directed to a free radical control agent of the structural formula:
wherein R1 is a divalent alkyl group of 1 to 12 carbon atoms, R2 and R3 are each independently hydrogen or an alkyl group of 1 to 12 carbon atoms, and R4 is - OH or -COOH, with the proviso that the total carbon atoms of R1, R2, and R3 is no greater than 12; and wherein Y represents a functional group that is capable of activating a vinylic carbon toward free radical addition.