This invention relates to novel macromers containing dithiocarbonate (or xanthate) groups, novel preformed stabilizers comprising macromers, and novel polymer polyols comprising the novel macromers and/or novel preformed stabilizers. This invention also relates to processes for the preparation of these materials. Other aspects of this invention include foams comprising the novel polymer polyols and a process for preparing foam comprising the novel polymer polyols.

This invention relates to novel macromers containing dithiocarbonate (or xanthate) groups, novel preformed stabilizers comprising macromers, and novel polymer polyols comprising the novel macromers and/or novel preformed stabilizers. This invention also relates to processes for the preparation of these materials. Other aspects of this invention include foams comprising the novel polymer polyols and a process for preparing foam comprising the novel polymer polyols.

A process for preparing a sulfur copolymer, a sulfur copolymer, and a polymer composition containing one or more sulfur copolymers are provided. The process involves copolymerizing a cyclic monothiocarbonate compound of formula

##STR00001##

wherein
R.sup.1 and R.sup.2 are independently of one another hydrogen, C.sub.1-C.sub.18-alkyl, C.sub.1-C.sub.18-alkyl substituted with halogen or interrupted with O or S; C.sub.6-C.sub.18-aryl or C.sub.6-C.sub.12-aryl substituted with C.sub.1-C.sub.4-alkyl, C.sub.1-C.sub.4-alkoxy, C.sub.1-C.sub.4-alkylthio or halogen; with elemental sulfur in the presence of a polymerization initiator.

A process for preparing a sulfur copolymer, a sulfur copolymer, and a polymer composition containing one or more sulfur copolymers are provided. The process involves copolymerizing a cyclic monothiocarbonate compound of formula

##STR00001##

wherein
R.sup.1 and R.sup.2 are independently of one another hydrogen, C.sub.1-C.sub.18-alkyl, C.sub.1-C.sub.18-alkyl substituted with halogen or interrupted with O or S; C.sub.6-C.sub.18-aryl or C.sub.6-C.sub.12-aryl substituted with C.sub.1-C.sub.4-alkyl, C.sub.1-C.sub.4-alkoxy, C.sub.1-C.sub.4-alkylthio or halogen; with elemental sulfur in the presence of a polymerization initiator.

This invention relates to novel macromers containing dithiocarbonate (or xanthate) groups, novel preformed stabilizers comprising macromers, and novel polymer polyols comprising the novel macromers and/or novel preformed stabilizers. This invention also relates to processes for the preparation of these materials. Other aspects of this invention include foams comprising the novel polymer polyols and a process for preparing foam comprising the novel polymer polyols.

This invention relates to novel macromers containing dithiocarbonate (or xanthate) groups, novel preformed stabilizers comprising macromers, and novel polymer polyols comprising the novel macromers and/or novel preformed stabilizers. This invention also relates to processes for the preparation of these materials. Other aspects of this invention include foams comprising the novel polymer polyols and a process for preparing foam comprising the novel polymer polyols.

A process for preparing a sulfur copolymer, a sulfur copolymer, and a polymer composition containing one or more sulfur copolymers are provided. The process involves copolymerizing a cyclic monothiocarbonate compound of formula ##STR00001##
wherein R.sup.1 and R.sup.2 are independently of one another hydrogen. C.sub.1-C.sub.18-alkyl, C.sub.1-C.sub.18-alkyl substituted with halogen or interrupted with O or S; C.sub.6-C.sub.18-aryl or C.sub.6-C.sub.12-aryl substituted with C.sub.1-C.sub.4-alkyl, C.sub.1-C.sub.4-alkoxy, C.sub.1-C.sub.4-alkylthio or halogen; with elemental sulfur in the presence of a polymerization initiator.

A process for preparing a sulfur copolymer, a sulfur copolymer, and a polymer composition containing one or more sulfur copolymers are provided. The process involves copolymerizing a cyclic monothiocarbonate compound of formula ##STR00001##
wherein R.sup.1 and R.sup.2 are independently of one another hydrogen. C.sub.1-C.sub.18-alkyl, C.sub.1-C.sub.18-alkyl substituted with halogen or interrupted with O or S; C.sub.6-C.sub.18-aryl or C.sub.6-C.sub.12-aryl substituted with C.sub.1-C.sub.4-alkyl, C.sub.1-C.sub.4-alkoxy, C.sub.1-C.sub.4-alkylthio or halogen; with elemental sulfur in the presence of a polymerization initiator.

A polymer obtainable by reacting a compound A) comprising at least one five-membered cyclic monothiocarbonate group and at least one polymerizable, ethylenically unsaturated group, a compound B) comprising at least one amino group, selected from primary or secondary amino groups, optionally a compound C) which is different from compound A) and comprises at least one five-membered cyclic monothiocarbonate group, and optionally a compound D) which is different from compound A) and comprises at least one functional group that reacts with a group SH.

A polymer obtainable by reacting a compound A) comprising at least one five-membered cyclic monothiocarbonate group and at least one polymerizable, ethylenically unsaturated group, a compound B) comprising at least one amino group, selected from primary or secondary amino groups, optionally a compound C) which is different from compound A) and comprises at least one five-membered cyclic monothiocarbonate group, and optionally a compound D) which is different from compound A) and comprises at least one functional group that reacts with a group SH.