High refractive index, high Abbe compositions
US-12071497-B2 · Aug 27, 2024 · US
Amphiphilic polysiloxane prepolymers and uses thereof
US8987403B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8987403-B2 |
| Application number | US-201314014631-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 30, 2013 |
| Priority date | Jul 30, 2010 |
| Publication date | Mar 24, 2015 |
| Grant date | Mar 24, 2015 |
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Abstract
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The present invention provides an amphiphilic polysiloxane prepolymer which comprises hydrophilic monomeric units derived from at least one hydrophilic vinylic monomer, polysiloxane crosslinking units derived from at least one polysiloxane crosslinker having at least two terminal ethylenically-unsaturated groups, dangling polysiloxane chains each of which is terminated with one ethylenically unsaturated group, and chain-transfer units derived from a chain transfer agent other than a RAFT agent. A prepolymer of the invention is suitable for making hydrogel contact lenses. The present invention is also related to hydrogel contact lenses made from an amphiphilic polysiloxane prepolymer of the invention and to processes for preparing an amphiphilic polysiloxane prepolymer of the invention and for making silicone hydrogel contact lenses.
First claim
Opening claim text (preview).
What is claimed is: 1. A partially ethylenically-functionalized polysiloxane, which is a mixture of reaction products obtained by reacting an ethylenically functionalizing vinylic monomer having a first reactive functional group with a linear functional polysiloxane compound having two terminal second reactive functional groups at a molar equivalent ratio, R Equivalent , of from about 40% to about 97%, wherein each first reactive functional group reacts with one second reactive fun…
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Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
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- What does patent US8987403B2 cover?
- The present invention provides an amphiphilic polysiloxane prepolymer which comprises hydrophilic monomeric units derived from at least one hydrophilic vinylic monomer, polysiloxane crosslinking units derived from at least one polysiloxane crosslinker having at least two terminal ethylenically-unsaturated groups, dangling polysiloxane chains each of which is terminated with one ethylenically un…
- Who is the assignee on this patent?
- Novartis Ag
- What technology area does this patent fall under?
- Primary CPC classification G02B1/043. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Mar 24 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).