US3637416A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of treating synthetic plastic and elastomeric materials and articles produced thereby
Assignee: Mbt Corp
•
Filing: 1970-02-04
•
Granted: 1972-01-25
•
Expires: 1990-02-04
Abstract
Abstract A method of improving the surface characteristics of plastics and elastomers which in its preferred aspects includes the steps of forming a bonding or coupling film of an organic silicon compound on the surface of a plastic or elastomeric material and thereafter contacting the film with a compound or a mixture of compounds, or a solution thereof, capable of forming a deposit or coating of silica or silica gel thereon, and articles produced in accordance with the method.
Inventors
- 👤 Robert D Misch
- 👤 Donald A Daus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:51
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/04; C08J7/043; A; A61; A61C; A61C13/00; A61C13/01; A61C13/02; A61K; A61K6/00; A61K6/80; A61K6/884; A61K6/891; A61K6/896; B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B27/30; B32B27/302; B32B27/308; B32B27/36; B32B27/365; C08J7/0427; C08J7/044; C08J7/046; C08J7/056; G; G02; G02B; G02B5/00; G02B5/04; B32B2255/00; B32B2255/10; B32B2307/00; B32B2307/40; B32B2307/412; B32B2307/70; B32B2307/728; B32B2551/00; C08J2483/00; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31507; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
33 words
A method as claimed in claim 1 wherein the bonding film or layer and the silica or silica gel deposit are formed in an atmosphere having a relative humidity above about 10 percent.
Claim 2
Dependent Claim
28 words
A method as claimed in claim 1 wherein formation of the bonding film or layer and the silica or silica gel deposit are effected in the vapor phase.
Claim 3
Dependent Claim
32 words
A method as claimed in claim 1 wherein the organic silicon compounds are applied to the surface of a plastic or elastomeric material in the form of dilute organic solvent solutions thereof.
Claim 4
Dependent Claim
29 words
A method as claimed in claim 4 wherein the concentration of the organic silicon compounds in the solvent solutions, basis weight, is from 1 percent to about 10 percent.
Claim 5
Dependent Claim
42 words
A method as claimed in claim 1 wherein the treatment is carried out with a solution comprising a mixture of bonding film or layer forming compound and a silica or silica gel forming compound, said compounds having different evaporation and hydrolyzation rates.
Claim 6
Dependent Claim
27 words
A method as claimed in claim 6 wherein the treatment is carried out with an organic solvent solution comprising a minor proportion of silicon tetrachloride and gamma-mercaptopropyltrimethoxysilane.
Claim 7
Dependent Claim
55 words
A method as claimed in claim 1 wherein the bonding film or layer is formed from a reaction mixture comprising a silane containing an amino group and a silane containing an epoxy group, said silanes being present in the reaction mixture in approximately stoichiometric proportions to effect a reaction between the amino and epoxy groups.
Claim 8
Dependent Claim
23 words
A method as claimed in claim 8 wherein the reaction mixture comprises gamma-aminopropyltriethoxysilane and beta-(3, 4epoxycyclohexyl)-ethyltrimethoxy silane in about a 1:2 mol ratio.
Claim 9
Dependent Claim
22 words
A method as claimed in claim 8 wherein the reaction mixture comprises n-(trimethoxysilylpropyl)-ethylene diamine and gamma-glycidoxypropyltrimethoxysilane in about a 1:3 mol ratio.
Claim 10
Dependent Claim
61 words
A method as claimed in claim 1 wherein the silica or silica gel deposit is formed from a solution comprising a silicic ester and from 1 percent to 6 percent, by weight of the solution, of a silicon halide, and a silane having an organic group bonded directly to silicon through a carbon-silicon bond and three hydrolyZable groups bonded to silicon.
Claim 11
Dependent Claim
17 words
A method as claimed in claim 11 wherein the solution comprises tetraethylorthosilicate and silicon tetrachloride and gamma-glycidoxypropyltrimethoxysilane.
Claim 12
Dependent Claim
16 words
A method as claimed in claim 11 wherein the solution comprises tetraethylorthosilicate, silicon tetrachloride and vinyltriacetoxy.
Claim 13
Dependent Claim
23 words
A method as claimed in claim 11 wherein the solution comprises tetraethylorthosilicate, silicon tetrachloride and a reaction mixture comprising gamma-aminopropyltriethoxysilane and beta-3,4(epoxycyclohexyl) ethyltrimethoxysilane.
Claim 14
Dependent Claim
45 words
A method as claimed in claim 1 wherein the bonding film or layer forming organic silicon compound and the second silicon compound are applied to the surface of a plastic or elastomeric material in the form of a vapor carried by a substantially inert gas.
Claim 15
Dependent Claim
18 words
A method as claimed in claim 15 wherein the substantially inert gas comprises air, nitrogen, argon or helium.
Claim 16
Dependent Claim
33 words
A method as claimed in claim 1 wherein a minor proportion of a colloidal silica is utilized to augment formation on the bonding film or layer of the silica or silica gel deposit.
Claim 17
Dependent Claim
121 words
A synthetic plastic or elastomeric material having improved surface characteristics comprising a synthetic plastic or elastomeric inner substrate, an intermediate polymeric bonding film or layer on the surface of the inner substrate comprising a polymer formed of an organic silicon compound, said compound being characterized by having an organic group with functionality in one or more positions bonded directly to the silicon through a carbon-silicon bond and three hydrolyzable groups bonded to silicon, and an exposed, outer deposit on the polymeric bonding film or layer of a silica or silica gel which is stabilized at said film or layer, said deposit being hydrophilic, oleophobic when wet, and harder and more electrically conductive or antistatic than the synthetic plastic or elastomeric material.
Claim 18
Dependent Claim
13 words
A material as claimed in claim 18 wherein the substrate is polymethyl methacrylate.
Claim 19
Dependent Claim
15 words
A material as claimed in claim 18 wherein the substrate is diethyleneglycol bis (allyl carbonate).
Claim 20
Dependent Claim
14 words
A material as claimed in claim 18 wherein the substrate is a polycarbonate resin.
Claim 21
Dependent Claim
12 words
A material as claimed in claim 18 wherein the substrate is polystyrene.
Claim 22
Dependent Claim
73 words
A material as claimed in claim 18 wherein the bonding film or layer comprises a polymer of a compound selected from the group consisting of: a. R-Si Cl3 b. R-Si (OR'')3 or wherein R is vinyl, allyl, or alkyl, the alkyl having at least one of methacryloxy, amino, epoxy or mercapto groups thereon, and having at least two carbon atoms and being bonded directly to the silicon, and -OR'' is alkoxy or beta-methoxy-ethoxy.
Claim 23
Independent Claim
181 words
A method of preparing a synthetic plastic lens having a substantially permanent outer coating which is hydrophilic, clear and transparent comprising applying to the surface of a synthetic plastic lens a hydrolyzable bonding film-forming organic silicon compound characterized by having an organic group with functionality in one or more positions bonded directly to the silicon through a carbon-silicon bond and three hydrolyzable groups bonded to silicon to effect formation of a bonding film or layer on the surface of said lens, applying to said bonding film or layer an essentially water free composition consisting essentially of a second hydrolyzable silicon compound characterized by having four halogen groups bonded to silicon, or a silicic ester characterized in that the functional group is bonded to silicon through an oxygen atom and there is no direct carbon-silicon bond, in a moisture containing atmosphere thereby to effect formation on said bonding film or layer of a coating of silicon dioxide to provide the lens with a clear, transparent coating which is hydrophilic and has substantially no effect on the light transmitting characteristics of the lens.
Claim 24
Dependent Claim
21 words
A method as claimed in Claim 24 wherein the bonding film-forming compound is allyltrichlorosilane and said second silicon compound is tetrachlorosilane.
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) | 1975-01-24 | 1975-07-26 | 1976-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-24 | 1979-07-26 | 1980-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-24 | 1983-07-26 | 1984-01-25 | $7700.00 | Window Closed / Lapsed |