Patent ID: 7563859

Claim:
A mono component hydrosetting sealant containing as the base compound a silane terminated polymer obtained by addition reaction between an organic derivative of silicon and the terminal functional groups of linear or branched polymers obtained by the Michael polyaddition reaction of sulphydric acid (H 2 S) with organic compounds which can contain a repeating unit and hence have variable molecular weigh which have at least two alkenyl double bonds activated by the presence, in the alpha position with respect to each alkylenic bond, of an electronegative group and selected from the group consisting of: W′[—C(R 7 )═CH 2 ] 2 (9) Q[—W—C(R 7 )═CH 2 ] 2 (9a) Q[—W—C(R 7 )═CH 2 ] 3 (9b) Q[—W—C(R 7 )═CH 2 ] 4 (9c) wherein: W′= electron-attractor group selected from the group consisting of: —SO—, —SO 2 —, —O—, —CO—, W= electron-attractor group selected from the group consisting of: —SO—, —SO 2 —, —O—, —CO—, —O—CO—; R 7 =—H or —CH 3 ; Q =divalent, trivalent or tetravalent group selected from the group consisting of hydrocarbon radicals, hetero-hydrocarbon radicals, polyethers, polyesters; n =an integer greater than or equal to 1; thereby obtaining: i) in case (n+1) moles of the compound of formula (9) are reacted with n moles of H 2 S, the following linear polymer (9′) CH 2 ═C(R 7 )—[W′—CH(R 7 )—CH 2 -S—CH 2 —CH(R 7 )] n —W′—C(R 7 )═CH 2 (9′) ii) in case n moles of the compound of formula (9) are reacted with (n+1) moles of H 2 S, the following linear polymer (9″) HS—[CH 2 CH(R 7 )—CH 2 —W′—CH(R 7 )—CH 2 —S—] n —H (9″) iii) in case (n+1) moles of the compound of formula (9a) are reacted with n moles of H 2 S, the following linear polymer (9a′) CH 2 ═C(R 7 )—[W-Q-W—CH(R 7 )—CH 2 —S—CH 2 —CH(R 7 )] n —W-Q-W—C(R 7 )═CH 2 (9a′) iv) in case n moles of the compound of formula (9a) are reacted with (n+1) moles of H 2 S, the following linear polymer (9a″) HS—[CH 2 —CH(R 7 )—W-Q-W—CH(R 7 )—CH 2 —S] n —H (9a″) v) in case (n+1) moles of the compound of formula (9b) are reacted with n moles of H 2 S, the following polymer (9b′) vi) in case n moles of the compound of formula (9b) are reacted with (n+1) moles of H 2 S, the following polymer (9b″) vii) in case (n+1) moles of the compound of formula (9c) are reacted with n moles of H 2 S, the following polymer (9c′) viii) in case n moles of the compound of formula (9c) are reacted with (n+1) moles of H 2 S, the following polymer (9c″)