Polysiloxane prepolymers for biomedical devices

C - Chemistry – Metallurgy – 08 – G

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Details

C08G 18/61 (2006.01) C08F 290/06 (2006.01) C08F 290/14 (2006.01) C08F 299/06 (2006.01) C08F 299/08 (2006.01) C08G 18/67 (2006.01) G02B 1/04 (2006.01)

Patent

CA 2592206

A polysiloxane prepolymer that is useful for forming biomedical devices comprises blocks (I) and (II) and is terminated at each end with an ethylenic unsaturated radical: (*Dii*Diol*Dii*PS)x (I) (*Dii*PS)y (II) wherein: each Dii is independently a diradical residue of a diisocyanate; each Diol is independently a diradical residue of a diol having 1 to 10 carbon atoms; each PS is independently a diradical residue of a polysiloxane-containing diol or diamine; each * is independently -NH-CO-NH-, -NH-COO- or -OCO-NH-: x represents the number of blocks (I) and is at least 2, and y represents the number of blocks (II) and is at least 1.

L'invention concerne un pré-polymère polysiloxane utilisable pour la fabrication de dispositifs biomédicaux. Le pré-polymère polysiloxane comprend des séquences (I) et (II) et il se termine à chaque extrémité par un radical éthylénique insaturé : (*Dii*Diol*Dii*PS)x (I) (*Dii*PS)y (II). Dans ces séquences : chaque Dii est indépendamment un résidu diradical de diisocyanate ; chaque Diol est indépendamment un résidu diradical d'un diol ayant de 1 à 10 atomes de carbone ; chaque PS est indépendamment un résidu diradical d'un diol ou d'une diamine contenant un polysiloxane ; chaque * est indépendamment un -NH-CO-NH-, un -NH-COO- ou un -OCO-NH- ; x représente le nombre de séquences (I) et est au moins égal à 2 et y représente le nombre de séquences (II) et est au moins égal à 1.

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