US3779774A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silicone surfactants for vesicular films
Assignee: Xidex Corp
•
Filing: 1972-05-09
•
Granted: 1973-12-18
•
Expires: 1992-05-09
Abstract
Abstract Silicone surfactants are added to vesicular film vehicles to improve the sensitivity thereof, while further maintaining very small vesicle size in the development image which results in films of improved resolution. Preferred silicone surfactants are polysiloxane-hydroxy substituted alkylenes and polysiloxanehydroxy substituted oxyalkylenes in which the alkylene and oxyalkylene groups terminate with an amine function.
Inventors
- 👤 O Cope
- 👤 S Chaikin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:38
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/60
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
29 words
A vesicular film according to claim 1, wherein said silicone surfactant reduces the surface tension of water below about 24 dynes/cm at one weight percent concentration at 25* C.
Claim 2
Dependent Claim
25 words
A vesicular film according to claim 1, wherein said silicone surfactant has a hydrophobic polysiloxane group and a hydrophilic group which is a polyoxyalkylene group.
Claim 3
Dependent Claim
19 words
A vesicular film according to claim 3, wherein said hydrophilic group is an aminohydroxy substituted alkyl or alkoxyalkyl group.
Claim 4
Dependent Claim
16 words
A vesicular film according to claim 4, wherein said amino group is a quaternary ammonium group.
Claim 5
Dependent Claim
16 words
A vesicular film according to claim 4, wherein said amino group is a dialkyl amino group.
Claim 6
Dependent Claim
152 words
In a vesicular film including a film base having a polymeric vehicle for a vesicular film coated thereon, wherein said polymeric vehicle is an addition or condensation polymer, selected from the group consisting of homopolymer or copolymer addition polymers formed from vinylidene chloride, acrylonitrile and methacrylonitrile; poly(vinyl formal) homopolymers and copolymers; and poly (hydroxy ether) condensation polymers derived from dihydroxyphenols and epichlorohydrin, and a light sensitive material uniformly dispeRsed through said vehicle which decomposes to give nitrogen gas upon exposure to light, the improvement which comprises: including in said polymeric vehicle from 0.01 to 5 weight percent of a silicone surfactant for increasing the film sensitivity and resolution, said silicone surfactant having a hydrophobic polysiloxane group, and a hydrophilic group which is a polyoxyalkylene group, an aminohydroxy substituted alkyl or alkoxyalkyl group, or a combination thereof, wherein said surfactant reduces the surface tension of water at 25* C below about 24 dynes/cm.
Claim 7
Dependent Claim
15 words
A vesicular film according to claim 7, wherein said polymeric vehicle is a polyhydroxy ether.
Claim 8
Dependent Claim
15 words
A vesicular film according to claim 7, wherein said polymeric vehicle is a polyvinyl formal.
Claim 9
Dependent Claim
22 words
A vesicular film according to claim 7, wherein said silicone surfactant is a block or copolymer of a polysiloxane and a polyoxyalkylene.
Claim 10
Dependent Claim
21 words
A vesicular film according to claim 7, wherein said silicone surfactant is a polysiloxane substituted with at least one aminohydroxyalkyl group.
Claim 11
Dependent Claim
13 words
A vesicular film according to claim 11, wherein said amino group is quaternary.
Claim 12
Dependent Claim
21 words
A vesicular film according to claim 7, wherein said silicone surfactant is a polysiloxane substituted by at least one aminohydroxyalkoxyalkyl group.
Claim 13
Dependent Claim
13 words
A vesicular film according to claim 13, wherein said amino group is quaternary.
Claim 14
Dependent Claim
128 words
In a vesicular film including a film base having having a polymeric vehicle, which is a linear poly(hydroxy ether) of an epichlorohydrin and a dihydric phenol, coated thereon and a light sensitive material uniformly dispersed through said vehicle which decomposes to give nitrogen gas upon exposure to light, the improvement which comprises having an effective amount of a silicone surfactant which reduces the surface tension of water at a concentration of one weight percent at 25* C to below about 24 dynes/cm, wherein said silicone surfactant is of the formula A-B, and A is a polysiloxane group and B is a polyoxyalkylene group; an amine substituted polyoxyalkylene group having the amine substituent as dialkyl amino, quaternary ammonium or amine salt; or an aminohydroxy substituted alkyl or alkoxyalkyl group.
Claim 15
Dependent Claim
21 words
A vesicular film according to claim 15, wherein said silicone surfactant is a polysiloxane substituted by at least one polyoxyalkylene group.
Claim 16
Dependent Claim
21 words
A vesicular film according to claim 15, wherein said silicone surfactant is a polysiloxane substituted by at least one quaternary(ammonium)hydroxyalkyl group.
Claim 17
Dependent Claim
22 words
A vesicular film according to claim 15, wherein said silicone surfactant is a polysiloxane substituted by at least one dialkyl aminohydroxyalkyl group.
Claim 18
Dependent Claim
21 words
A vesicular film according to claim 15, wherein said silicone surfactant is a polysiloxane substituted by at least one ammoniumhydroxyalkyl group.
References Cited (Backward Citations)
US2598453A
Cited
US2703756A
Cited
US2834748A
Cited
US3108872A
Cited
US3260599A
Cited
US3389160A
Cited
GB1141591A
Cited
US3505377A
Cited
US3520683A
Cited
US3549376A
Cited
US3549368A
Cited
US3498786A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-17 | 1977-06-18 | 1977-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-17 | 1981-06-18 | 1981-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-17 | 1985-06-18 | 1985-12-18 | $7700.00 | Window Closed / Lapsed |