Patent US4919972A successfully refreshed from Google Patents.
US4919972A
Expired / Lapsed
US
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Process for surface modification of polymer articles
Assignee: M&T Chemicals Inc
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Filing: 1988-07-28
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Granted: 1990-04-24
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Expires: 2008-07-28
Abstract
Abstract A composition and process for modifying the surface region of a polymer article. The composition is a mixture of a resin surface modifier ingredient, a resin-swellable organic solvent and a surfactant additive. The composition is contacted with the surface of a resin article, while the article is immersed in a liquid which may also contain a surfactant which is non-aggressive toward the article and immiscible with the solvent. The surfactant alters the wetting characteristics of the air-liquid, or liquid-surface modifier interfaces, or both interfaces, so that a film of the modifier ingredient does not form on the surface of the liquid layer.
Inventors
- 👤 Neal Conrad
- 👤 Michael T. Burchill
- 👤 Joseph Silbermann
- 👤 Thomas Hoffman
- 👤 Maurice Bourrel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:06
CPC Classifications
B; B05; B05D; B05D7/00; B05D7/02; B05C; B05C3/00; B05C3/18; B05C9/00; B05C9/02; B05D1/00; B05D1/18; B05D1/20; C; C08; C08J; C08J7/00; C08J7/04; C08J7/06; C08J7/065; C08J2327/00; C08J2327/02; C08J2327/04; C08J2327/06
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
45 words
A modifier composition for incorporating a modifier ingredient into the surface region of a resinous article, consisting essentially of: (a) about 1-60% by weight of a U.V. stabilizer dissolved in, (b) a resin-swellable organic solvent, and (c) about 0.1-6% by weight of a surfactant additive.
Claim 2
Dependent Claim
45 words
A modifier composition for incorporating a modifier ingredient into the surface region of a resinous article, consisting essentially of: (a) about 1-60% by weight of a U.V. stabilizer dissolved in, (b) a resin-swellable organic solvent, and (c) about 0.1-6% by weight of a surfactant additive.
Claim 3
Dependent Claim
40 words
A modifier composition according to claim 1 consisting essentially of: (a) about 10-40% by wt. of a U.V. stabilizer dissolved in (b) a resin swellable, water-immiscible organic solvent, and (c) about 1-3% by wt. of a surfactant additive dissolved therein.
Claim 4
Dependent Claim
15 words
A modifier composition according to claim 2 wherein said surfactant additive is a non-ionic surfactant.
Claim 5
Dependent Claim
17 words
A modifier composition according to claim 3 wherein said surfactant additive has an HLB of about 3-10.
Claim 6
Dependent Claim
14 words
A modifier composition according to claim 1, wherein said organic solvent is methylene chloride.
Claim 7
Dependent Claim
24 words
A modifier composition according to claim 1 wherein said organic solvent is selected from the group consisting of halogenated hydrocarbons, ketones, esters and ethers.
Claim 8
Dependent Claim
40 words
A modifier composition according to claim 1 wherein said organic solvent is selected from the group consisting of halogenated hydrocarbons having up to two carbon atoms in the chain, aliphatic and cycloaliphatic ketones, aliphatic esters and aliphatic and cycloaliphatic ethers.
Claim 9
Dependent Claim
16 words
A modifier composition according to claim 3 wherein said surfactant additive is an ethoxylated alkyl phenol.
Claim 10
Dependent Claim
15 words
A modifier composition according to claim 3 wherein said surfactant additive is an ethoxylated alkanol.
Claim 11
Dependent Claim
21 words
A modifier composition according to claim 1, wherein said U.V. stabilizer is present in an amount of about 10-40% by weight.
Claim 12
Dependent Claim
21 words
A modifier composition according to claim 10, wherein said surfactant additive is present in an amount of about 1-3% by weight.
Claim 13
Dependent Claim
21 words
A modifier composition according to claim 11, wherein said surfactant additive is a non-ionic surfactant with an HLB of about 3-10.
Claim 14
Dependent Claim
14 words
A modifier composition according to claim 12, wherein said organic solvent is methylene chloride.
Claim 15
Dependent Claim
103 words
A process of incorporating a modifier ingredient into the surface region of a resinous article, comprising: immersing said article in a solvent-immiscible liquid composition, which is non-aggressive toward said article, and contacting the immersed article with a modifier composition comprising a modifier ingredient in a solvent, wherein a surfactant is present in at least either said liquid composition or said modifier composition, or both, in a concentration sufficient to affect the wetting characteristics of said liquid composition or said modifier composition, without causing emulsification thereof, whereby formation of a film of modifier ingredient on the surface of said liquid composition is substantially eliminated.
Claim 16
Dependent Claim
103 words
A process of incorporating a modifier ingredient into the surface region of a resinous article, comprising: immersing said article in a solvent-immiscible liquid composition, which is non-aggressive toward said article, and contacting the immersed article with a modifier composition comprising a modifier ingredient in a solvent, wherein a surfactant is present in at least either said liquid composition or said modifier composition, or both, in a concentration sufficient to affect the wetting characteristics of said liquid composition or said modifier composition, without causing emulsification thereof, whereby formation of a film of modifier ingredient on the surface of said liquid composition is substantially eliminated.
Claim 17
Dependent Claim
65 words
A process according to claim 14 wherein said liquid is water present as an upper layer, and said modifier composition is present as a lower layer, wherein said modifier composition is pumped from said lower layer into said upper layer and directed onto the surface of said article which is immersed in said upper layer whereby said modifier ingredient is incorporated into the contacted surface.
Claim 18
Dependent Claim
23 words
A process according to claim 14 wherein said surfactant is present in said liquid composition in a concentration of about 0.001-0.2 weight %.
Claim 19
Dependent Claim
25 words
A process according to claim 14 wherein said surfactant is present in said modifier composition in a concentration of about 0.1 to 6 weight %.
Claim 20
Dependent Claim
13 words
A process according to claim 17 wherein said surfactant is a non-ionic surfactant.
References Cited (Backward Citations)
US3076723A
Cited
GB1024342A
Cited
US3297462A
Cited
US3519462A
Cited
US3870519A
Cited
US4319016A
Cited
US4396644A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-04-23 | 1993-10-23 | 1994-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-23 | 1997-10-23 | 1998-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-23 | 2001-10-23 | 2002-04-24 | $7700.00 | Window Closed / Lapsed |