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US3935342A
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Hydrophilization of non-polar surfaces
Assignee: Merck Patent GmbH
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Filing: 1973-12-04
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Granted: 1976-01-27
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Expires: 1993-12-04
Abstract
Abstract A hydrophobic polymer is hydrophilized by polymerizing thereon a compound having the formula R4R1 ¦¦ (1) R5CH=C-COO(R6O)n-Si--R2 or ¦ R3 R4R1 ¦¦ (2) R5CH=C-COOR7 -OSi--R2 m ¦ R3 where R5 is hydrogen or lower alkyl, R4 is hydrogen, lower alkyl, halogen of atomic weight 9 to 80, phenyl or cyano, R6 is alkylene or haloalkylene of 2 to 4 carbon atoms, R7 is alkylene of 3 to 6 carbon atoms, n is an integer of 1 to 4, m is an integer of 2 to 5 and R1, R2 and R3 are lower alkyl, phenyl or tolyl and thereafter hydrolyzing off the silyl groups. Silylated copolymers can also be prepared to form the hydrophilic coating.
Inventors
- 👤 Drahoslav Lim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:00
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/12; C08J7/16; A; A61; A61K; A61K39/00; A61K39/35; A61K39/36; A61K41/00; A61K41/0028; C08F; C08F255/00; C08F255/02; C08F255/04; C08F257/00; C08F257/02; C08F283/00; C08F283/12; C08F291/00; C08F291/02; C08F8/00; C08F8/12; C08F2810/00; C08F2810/20
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
159 words
A process for preparing a hydrophobic polymer substrate having a coating thereon of a hydrophilic polymer selected from the group consisting of homopolymers and copolymers comprising (A) coating said substrate with material selected from the group consisting of (1) a silylated monomer having the formula: ##EQU10## or ##EQU11## and (2) a mixture of said silylated monomer and a copolymerizable monomer; wherein R 5 is hydrogen or lower alkyl; R 4 is hydrogen, lower alkyl, halogen of atomic weight 9 to 80, phenyl or cyano, R 6 is alkylene or haloalkylene of 2 to 4 carbon atoms; R 7 is alkylene of 3 to 6 carbon atoms; n is an integer of 1 to 4; m is an integer of 2 to 5; and R 1 , R 2 and R 3 are lower alkyl, pehnyl, or tolyl; (B) hydrolyzing the polymerized monomer or mixtures of monomers to form the hydrophilic polymer by replacing the ##EQU12## groups by hydrogen atoms.
Claim 2
Dependent Claim
159 words
A process for preparing a hydrophobic polymer substrate having a coating thereon of a hydrophilic polymer selected from the group consisting of homopolymers and copolymers comprising (A) coating said substrate with material selected from the group consisting of (1) a silylated monomer having the formula: ##EQU10## or ##EQU11## and (2) a mixture of said silylated monomer and a copolymerizable monomer; wherein R 5 is hydrogen or lower alkyl; R 4 is hydrogen, lower alkyl, halogen of atomic weight 9 to 80, phenyl or cyano, R 6 is alkylene or haloalkylene of 2 to 4 carbon atoms; R 7 is alkylene of 3 to 6 carbon atoms; n is an integer of 1 to 4; m is an integer of 2 to 5; and R 1 , R 2 and R 3 are lower alkyl, pehnyl, or tolyl; (B) hydrolyzing the polymerized monomer or mixtures of monomers to form the hydrophilic polymer by replacing the ##EQU12## groups by hydrogen atoms.
Claim 3
Dependent Claim
9 words
The product prepared by the process of claim 1.
Claim 4
Dependent Claim
17 words
The process of claim 1, where R 5 is hydrogen and R 4 is hydrogen or methyl.
Claim 5
Dependent Claim
9 words
The product prepared by the process of claim 3.
Claim 6
Dependent Claim
13 words
The process of claim 1, wherein the hydrophilic polymer formed is a homopolymer.
Claim 7
Dependent Claim
9 words
The product prepared by the process of claim 5.
Claim 8
Dependent Claim
30 words
The process of claim 1, wherein the hydrophilic polymer is a copolymer prepared by copolymerizing the silylated monomer with 0.1 to 50% on a molar basis of a copolymerizable monomer.
Claim 9
Dependent Claim
9 words
The product prepared by the process of claim 7.
Claim 10
Dependent Claim
29 words
The process of claim 7, wherein the copolymerizable monomer is present in an amount of 0.1 to 20% on a molar basis and is an ethylenically unsaturated cross-linking material.
Claim 11
Dependent Claim
12 words
The process of claim 1, wherein the silylated monomer has formula (1).
Claim 12
Dependent Claim
26 words
The process of claim 10 wherein R 5 is hydrogen, R 4 is hydrogen or methyl, n is 2 to 3 and R 6 is alkylene.
Claim 13
Dependent Claim
28 words
The process of claim 11, wherein two of the R 1 , R 2 , and R 3 members are from the group consisting of methyl and ethyl.
Claim 14
Dependent Claim
14 words
The process of claim 1, wherein the hydrophobic polymer substrate is a hydrocarbon polymer.
Claim 15
Dependent Claim
9 words
The product prepared by the process of claim 13.
Claim 16
Dependent Claim
28 words
The process of claim 13, wherein the hydrocarbon polymer is natural rubber, polyisobutylene, polystyrene, polyethylene, polypropylene, ethylene-propylene copolymer, ethylene-propylene-non-conjugated polyene terpolymer, butyl rubber, butadiene-styrene copolymer or cis-isoprene polymer.
Claim 17
Dependent Claim
14 words
The process of claim 1, wherein the hydrophobic polymer substrate is a silicone rubber.
Claim 18
Dependent Claim
9 words
The product prepared by the process of claim 16.
Claim 19
Dependent Claim
36 words
The process of claim 1, wherein the hydrophobic polymer substrate is a butadiene-acrylonitrile copolymer, a perfluorinated hydrocarbon polymer, a polyester, an acrylonitrile polymer, nylon, a vinyl chloride polymer, a polymer of an alkyl acrylate or methacrylate.
Claim 20
Dependent Claim
9 words
The product prepared by the process of claim 18.
Claim 21
Dependent Claim
14 words
The process of claim 1, wherein the pH is other than 5.5 to 8.5.
Claim 22
Dependent Claim
20 words
A process according to claim 1 wherein the composition employed for said coating consists essentially of said monomer or monomers.
Claim 23
Dependent Claim
26 words
A process according to claim 21 wherein the composition employed for said coating consists of (1) said monomer or monomers and (2) a free radical initiator.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-01-26 | 1979-07-28 | 1980-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-26 | 1983-07-28 | 1984-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-26 | 1987-07-28 | 1988-01-27 | $7700.00 | Window Closed / Lapsed |