Prepolymers containing silyl groups, the production thereof,...

C - Chemistry – Metallurgy – 08 – G

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C08G 18/76 (2006.01) C08G 18/28 (2006.01) C08G 18/80 (2006.01) C08J 9/04 (2006.01) C09J 175/04 (2006.01) C08K 5/00 (2006.01) C08K 5/521 (2006.01)

Patent

CA 2503952

The invention relates to a prepolymer containing at least one group of general formula (I) -X-A-Si(Z)n(OR)3-n (I), and optionally at least one group of general formula (II) -N(R1)-C(O)-Y-R2 (II), wherein R1 represents H or a linear or branched, saturated or unsaturated alkyl radical comprising between 1 and 18 C atoms; the radical R2 respectively represents a linear or branched, saturated or unsaturated alkyl radical comprising between 1 and 44 C atoms or a radical of general formula (III) R3-(O)-CHR4-CHR4)n- (III) wherein R3 represents a linear or branched, saturated or unsaturated alkylene radical comprising between 1 and 44 C atoms, and the radicals R4 independently represent H or a linear or branched alkyl radical comprising between 1 and 4 C atoms; n represents a number between 1 and 1000; and Y represents O, S or NR2, R2 having the cited designation. The total number of functional groups I and II in the prepolymers amounts to more than 2. The invention also relates to compositions containing such prepolymers, to methods for the production thereof, and to the use of the same.

L'invention concerne un prépolymère qui contient au moins un groupe de formule générale -X-A-Si(Z)¿n?(OR)¿3-n? (I) et éventuellement au moins un groupe de formule générale -N(R?1¿)-C(O)-Y-R?2¿ (II), le nombre total des groupes fonctionnels I et II dans le prépolymère étant supérieur à 2. Dans la formule (II), R?1¿ représente H ou un reste alkyle linéaire ou ramifié, saturé ou insaturé, ayant 1 à 18 atomes de carbone, le reste R?2¿ représente respectivement un reste alkyle linéaire ou ramifié, saturé ou insaturé, ayant 1 à 44 atomes de carbone ou un reste de formule générale R?3¿-(O-CHR?4¿-CHR?4¿)¿n?- (III), et Y représente O, S ou NR?2¿, R?2¿ ayant la signification donnée ci-avant. Dans la formule (III), R?3¿ représente un reste alcylène linéaire ou ramifié, saturé ou insaturé, ayant 1 à 44 atomes de carbone et les restes R?4¿ représentent, indépendamment l'un de l'autre, H ou un reste alkyle linéaire ou ramifié, ayant 1 à 4 atomes de carbone. n vaut 1 à 1000. L'invention concerne également des compositions contenant de tels prépolymères, ainsi que des procédés pour leur production et leur utilisation.

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