Polythiol compositions and their process of preparation

Polythiol composition A obtained from a cycloaliphatic polyene containing x C═C double bonds, said composition comprising:

• the polythiol corresponding to said cycloaliphatic polyene comprising x-SH functions;
• and
• the thiol(s) corresponding to said cycloaliphatic polyene comprising (x-1)—SH functions;
• and
• in which the
• polythiol
• (
• x
• -
• 1
• )
• ⁢
• thiol
• (
• s
• )
• ratio by weight is of between 10.1:1 and 50,000:1;
• x being an integer greater than or equal to 3.

Polythiol composition B obtained from an isocyanurate of following general formula (I):

• in which R is a linear or branched hydrocarbon chain comprising at least one C═C double bond, which can optionally comprise one or more heteroatom(s), such as oxygen, nitrogen, sulfur and/or phosphorus, and which can optionally comprise one or more chemical group(s);
• said composition comprising:
• the polythiol corresponding to said isocyanurate comprising x-SH functions;
• and
• the thiol(s) corresponding to said isocyanurate comprising (x-1)—SH functions;
• in which the
• polythiol
• (
• x
• -
• 1
• )
• ⁢
• thiol
• (
• s
• )
• ratio by weight is of between 2:1 and 50,000:1;
• and
• x being an integer greater than or equal to 3.