1,3,2-Dioxaphospholanes as lubricant additives and lubricants containing same

A compound of formula I ##STR25## wherein R.sub.1 and R.sub.2 independently of one another are each C.sub.1 -C.sub.18 -alkyl, C.sub.5 -C.sub.12 -cycloalkyl, phenyl, phenyl substituted by one or two C.sub.1 -C.sub.12 alkyl groups, C.sub.7 -C.sub.9 aralkyl, C.sub.7 -C.sub.9 aralkyl substituted by one or two C.sub.1 -C.sub.12 alkyl groups;

• or R.sub.1 and R.sub.2 are each C.sub.2 -C.sub.10 alkoxyalkyl, C.sub.3 -C.sub.20 alkoxycarbonylalkyl;
• or R.sub.1 and R.sub.2 together form a bivalent radical of the formula II ##STR26## wherein R.sub.3, R.sub.4, R.sub.5 and R.sub.6 independently of one another are each hydrogen, C.sub.1 -C.sub.4 -alkyl, cyclohexyl or phenyl, R.sub.7 and R.sub.8 independently of one another are each hydrogen, C.sub.1 -C.sub.4 -alkyl, cyclohexyl, phenyl, nitro, cyano, C.sub.2 -C.sub.19 -alkoxycarbonyl, C.sub.2 -C.sub.18 -alkanoyl, a group of the formula (R.sub.9 --O).sub.2 --P(O)--, in which R.sub.9 is C.sub.1 -C.sub.18 -alkyl, or R.sub.7 and R.sub.8 together are 2-pentenylene or 2-butenylene, n is nought or 1, one of the radicals X.sub.1 or X.sub.2 is oxygen and the other is oxygen or sulfur, with the proviso that X.sub.1 and X.sub.2 independently can either be oxygen or sulfur when R.sub.1 and R.sub.2 together are a radical of formula II, m is nought or 1, and Y is hydrogen, halogen, --OR.sub.10, --SR.sub.10, --N(R.sub.11)R.sub.12, --OH.NH.sub.3, --SH.NH.sub.3, OH.(R.sub.11)N(R.sub.12)R.sub.13 or --SH.(R.sub.11)N(R.sub.12)R.sub.13, in which R.sub.10 is hydrogen, C.sub.1 -C.sub.18 alkyl, C.sub.5 -C.sub.12 cycloalkyl, phenyl, phenyl substituted by one or two C.sub.1 -C.sub.12 alkyl groups, phenyl substituted by a C.sub.3 -C.sub.20 alkoxycarbonylalkyl group or phenyl substituted by a mixture of alkyl and alkoxycarbonylalkyl groups;
• C.sub.7 -C.sub.9 aralkyl, C.sub.7 -C.sub.9 aralkyl substituted by one or two C.sub.1 -C.sub.12 alkyl groups, C.sub.7 -C.sub.9 aralkyl substituted by a C.sub.3 -C.sub.20 alkoxycarbonylalkyl group or C.sub.7 -C.sub.9 aralkyl substituted by a mixture of alkyl and alkoxycarbonylalkyl groups;
• C.sub.3 -C.sub.10 alkoxyalkyl or C.sub.3 -C.sub.20 alkoxycarbonylalkyl, and R.sub.11, R.sub.12 and R.sub.13 independently of one another are each hydrogen, C.sub. 1 -C.sub.30 -alkyl, C.sub.1 -C.sub.30 -alkenyl or C.sub.1 -C.sub.30 -alkoxyalkyl, whereby at least one of the radicals R.sub.11, R.sub.12 and R.sub.13 contains 1-30 C atoms.