 Laminated transparent assembly with edge sealing means |
| According to the present invention, laminated transparencies are provided with improved edge seal ... |
|
| Reflector |
| OF INVENTION The present invention relates to a reflector suitable for use in illumination such as ... |
|
| Fluoride ion as a curing catalyst for silicon-containing resins |
| OF THE INVENTION A composition of the invention contains (A) a silicon-containing resin having in ... |
|
| Sucrose fatty acid ester compositions and shortenings and margarines made therefrom |
| OF THE INVENTION It has now been discovered that it is possible to increase the rate at which ... |
|
| Method for lining a pipe or main |
| OF THE PRESENTLY PREFERRED EMBODIMENTS Referring to FIG. 1, a rig 1 comprises a heater tube 2 ... |
|
| Method for grounding pole structures in thin film magnetic heads |
| In the present invention, the above-described problems due to stray capacitance and noise ... |
|
| Heat-stabilized vinyl chloride polymers |
| OF THE INVENTION More particularly, a major object of this invention is the provision of PVC ... |
|
| Thermoplastic molding materials based on polyphenylene ethers, nylons and styrene copolymers |
| We claim: 1. A thermoplastic molding material comprising: (A) not less than 5% by weight of ... |
|
| Heat shrinkable polyvinyl chloride film with methyl methacrylate polymer additive |
| OF THE PREFERRED EMBODIMENTS When a uniaxially heat shrinkable film is prepared, the film ... |
|
|
Perfluoroalkylether macromer having two polymerizable groups
| Details |
Inventors: Meijs, Gordon Francis; Laycock, Bronwyn Glenice; Griffiths, Madeleine Clare; Cheong, Edith;
Assignee: Novartis AG (Basel, CH); Commonwealth Scientific and Industrial Research Organisation (Campbell, AU)
Primary Examiner: Lipman; Bernard
Assistant Examiner: Sarofim; N.
Attorney, Agent or Firm: Lee; Michael U.
A macromer of formula (I) is described: Q-(PFPE-L).sub.n-1 -PFPE-Q, wherein n>1.0; PFPE may be the same or different and is a perfluorinated polyether of formula (II): --OCH.sub.2 CF.sub.2 O(CF.sub.2 CF.sub.2 O).sub.x (CF.sub.2 O).sub.y CF.sub.2 CH.sub.2 O--, wherein the CF.sub.2 CF.sub.2 O and CF.sub.2 O units may be randomly distributed or distributed as blocks throughout the chain and wherein x and y may be the same or different such that the molecular weight of the PFPE is in the range of from 242 to 4,000; L is a difunctional linking group; and Q may be the same or different and is a polymerizable group. The macromer may be used preferably in the production of contact lenses. |
|
DETAILED DESCRIPTION The claims defining the invention are as follows: 1.
A macromonomer of the formula I: Q-(PFPE-L).
sub.
n-1 -PFPE-Q (I) wherein n>1.
0; PFPE may be the same or different and is a perfluorinated polyether of formula II: --OCH.
sub.
2 CF.
sub.
2 0(CF.
sub.
2 CF.
sub.
2 0)X(CF.
sub.
2 0)yCF.
sub.
2 CH.
sub.
2 0-- (II) wherein the CF2CF20 and CF20 units may be randomly distributed or distributed as blocks throughout the chain and wherein x and y may be the same or different such that the molecular weight of the PFPE is in the range of from 242 to 4,000; L is a difunctional linking group; and Q may be the same or different and is a ethylenically unsaturated polymerizable group, wherein said macromer is free of polyalkylether segments.
2.
A macromonomer according to claim 1 wherein n is in the range of from 2 to 5.
3.
A macromonomer according to claim 1 wherein n is in the range of from 2 to 4.
4.
A macromonomer according to claim 1 wherein Q is a polymerizable group which comprises an ethylenically unsaturated moiety.
5.
A macromonomer according to claim 1 wherein Q is selected from the group consisting of acryloyl, methacryloyl, styryl, acrylamido, acrylamidoalkyl, urethanemethacrylate, or any substituted derivatives thereof.
6.
A macromonomer according to claim 1 wherein L is a bivalent residue (--C(O)--NH--R--NH--C(O)--) of a diisocyanate wherein R is a divalent organic radical having up to 20 carbon atoms.
7.
A macromonomer according to claim 6 wherein the bivalent residue is derived from a diisocyanate selected from the group consisting of trimethylhexamethylenediisocyanate (TMHMDI), isophorone diisocyanate (IPDI), methylenediphenyl diisocyanate (MDI) and 1,6-hexamethylenediisocyanate (HMDI).
8.
A macromonomer according to claim 1 wherein x is in the range of from 0 to 20.
9.
A macromonomer according to claim 8 wherein x is in the range from 8 to 12.
10.
A macromonomer according to claim 1 wherein y is in the range of from 0 to 25.
11.
A macromonomer according to claim 10 wherein y is in the range from 10 to 14
|
| Related patents |
|
|
Silicon-on-silicon hybrid wafer assembly
According to the present invention, a technique for applying a thin film of silicon material to a target, or handle, wafer is provided. This technique separates thin ...
|
|
|
Polarized optical fiber and method of forming same
In accordance with the present invention, an optical fiber having an oriented microcrystalline structure causing inherent, fixed birefringence is provided without ...
|
|
|
Contrast enhancement filter
It has been found that a contrast enhancement filter having desirable antistatic and antireflection properties can be provided in the form of a plastic article which ...
|
|
|
Circularly polarized multi-bandpass interference contrast enhancement filter
It is a object of the present invention to provide a light filter which enhances the contrast of visual display devices. It is a feature of the present invention to ...
|
|
|
Video display terminal filter
OF THE INVENTION An understanding of certain important aspects of the present invention may be facilitated by the following brief review of some basic concepts of color ...
|
|
|
Polymeric anti-reflection coatings and coated articles
This invention provides devices comprising a reflective substrate having deposited thereon as an anti-reflection coating a thin film of copolymer of fluorine-containing ...
|
|
|
Method of imaging through a scattering medium using coherent light
What is claimed is: 1. A method of recording an image of an object obscured by a light-scattering medium, comprising storing said image in a spectral hole-burning ...
|
|
|
Material having antireflection, hydrophobic and abrasion resistance properties and process for depositing an antireflection, hydrophobic and abrasion resistant coating on a substrate
Consequently the object of the invention is to obviate these disadvantages and bring about the deposition of an abrasion-resistant, antireflection coating on a non-...
|
|
|
Light absorptive antireflector
What is claimed is: 1. A light absorptive antireflector consisting essentially of a substrate, a light absorbing film formed on the substrate and a silica film formed on ...
|
|
|
Polarizer plate with anti-stain layer
Generally speaking, in accordance with the invention, a polarizer plate is provided in which an anti-staining layer including a fluorine-containing silane compound is ...
|
|
|
Manufacturing Materials 
