Process for the manufacturing of a polymer with urethane groups

A curable composition, comprising:

• A) a five-membered cyclic monothiocarbonate,
• B) a compound comprising at least two amino groups, selected from primary or secondary amino groups, and
• C) a compound comprising at least one carbon-carbon triple bond or at least two functional groups that react with a —SH group;
• selected from the group consisting of non-aromatic, ethylenically unsaturated groups, isocyanate groups, groups with a non-aromatic carbon-nitrogen double bond, carbonyl groups and halides, or
• a reaction product of A) and B), and C),
• wherein
• A) is a monothiocarbonate of formula I
• wherein R1, R2, R3, and R4 each independently represent hydrogen or an organic group comprising up to 50 carbon atoms, and
• R2 and R4 and the two carbon atoms to which R2 and R4 are bonded optionally form a five to ten membered carbon ring.

A two-component curable system, comprising;

• a first component of A) and C) and a second component B), wherein
• A) is a five-membered cyclic monothiocarbonate,
• B) is a compound comprising at least two amino groups, selected from primary or secondary amino groups, and
• C) is a compound comprising at least one carbon-carbon triple bond or at least two functional groups that react with a —SH group, selected from the group consisting of non-aromatic, ethylenically unsaturated groups, isocyanate groups, groups with a non-aromatic carbon-nitrogen double bond, carbonyl groups and halides
• wherein
• A) is a monothiocarbonate of formula I
• wherein R1, R2, R3, and R4 each independently represent hydrogen or an organic group comprising up to 50 carbon atoms, and
• R2 and R4 and the two carbon atoms to which R2 and R4 are bonded optionally form a five to ten membered carbon ring.