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(19)

(11)

2 576 622

(13)

(51)

IPC

C08F290/14(2006-01-01)

C08F230/06(2006-01-01)

C08L51/08(2006-01-01)

G02C7/04(2006-01-01)

G02B1/04(2006-01-01)

(21) (22)

Application

2013108695/04, 2011-07-29

(24)

Start date

2011-07-29

(22)

Actual filing date

2011-07-29

(45)

Published

2016-03-10

(72)

Inventor

Chan FrenkSkott RobertKhuan TszinjuMedina Arturo N.Smit Don A.Sanders Lora EnnPruitt Dzhon Dallas

(73)

Holder

Novartic Ag

AMPHIPHILIC POLYSILOXANE PREPOLYMERS AND THEIR APPLICATION Russian patent published in 2016 - IPC C08F290/14 C08F230/06 C08L51/08 G02C7/04 G02B1/04

Abstract RU 2576622 C2

FIELD: chemistry.

SUBSTANCE: invention relates to amphiphilic polysiloxane prepolymers, applicable for manufacturing hydrogel contact lenses. Claimed is amphiphilic polysiloxane prepolymer, which contains hydrophilic monomer units, formed at least from one hydrophilic vinyl monomer, polysiloxane cross-linking units, formed from at least one polysiloxane cross-linking agent, containing not fewer than two terminal ethylene-unsaturated groups; dangling polysiloxane chains, each of which contains terminal ethylene-unsaturated group; and units - chain transfer agents, formed from reagent - chain transfer agent, which is not reagent of radical polymerisation with reversible chain transfer. Also claimed are hydrogel contact lenses, made of claimed amphiphilic polysiloxane prepolymer, claimed in present invention, and method for their obtaining, as well as intermediate product of obtaining claimed preolymer - polysiloxane, partly functionalised with ethylene.

EFFECT: claimed prepolymer is capable of sufficiently fast hardening in mould in obtaining contact lenses without significant shrinkage.

21 cl, 7 tbl, 10 ex

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RU 2 576 622 C2

Authors

Chan Frenk

Skott Robert

Khuan Tszinju

Medina Arturo N.

Smit Don A.

Sanders Lora Enn

Pruitt Dzhon Dallas

Dates

2016-03-10—Published

2011-07-29—Filed