Patent US4418162A successfully refreshed from Google Patents.
US4418162A
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Process for treating the surface of polyacetal resin
Assignee: Polyplastics Co Ltd
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Filing: 1981-04-30
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Granted: 1983-11-29
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Expires: 2001-04-30
Abstract
Abstract PCT No. PCT/JP81/00101 Sec. 371 Date Dec. 28, 1981 Sec. 102(e) Date Dec. 28, 1981 PCT Filed Apr. 30, 1981 PCT Pub. No. WO81/03178 PCT Pub. Date Nov. 12, 1981.A method for the surface treatment of polyacetal resin characterized in that the resin is treated with an acidic solution containing chloride ions and sulfuric acid ions can activate the surface so that the shaped article can be easily plated.
Inventors
- 👤 Takuzo Kasuga
- 👤 Yukio Ikenaga
- 👤 Masami Yamawaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:17
CPC Classifications
C; C23; C23C; C23C18/00; C23C18/16; C23C18/18; C23C18/20; C23C18/22; C23C18/24
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
64 words
A method for the surface treatment of polyacetal resin characterized in that the resin is treated with an acidic solution containing chloride ions and sulfuric acid ions, wherein the hydrogen ion content of the solution is about 0.6 to about 1.5 equivalents per 100 grams of the solution and wherein the weight ratio of hydrogen chloride to sulfuric acid is about 1:20 to 20:1.
Claim 2
Independent Claim
64 words
A method for the surface treatment of polyacetal resin characterized in that the resin is treated with an acidic solution containing chloride ions and sulfuric acid ions, wherein the hydrogen ion content of the solution is about 0.6 to about 1.5 equivalents per 100 grams of the solution and wherein the weight ratio of hydrogen chloride to sulfuric acid is about 1:20 to 20:1.
Claim 3
Dependent Claim
21 words
A method for the surface treatment according to claim 1, characterized in that the polyacetal resin is polyacetal containing calcium carbonate.
Claim 4
Dependent Claim
26 words
A method for the surface treatment according to claim 1, characterized in that the acidic solution is a mixed solution of hydrochloric acid and sulfuric acid.
Claim 5
Dependent Claim
27 words
A method for the surface treatment according to claim 1 wherein the hydrogen ion content is about 0.8 to about 1.3 equivalents per 100 grams of solution.
Claim 6
Dependent Claim
26 words
A method for the surface treatment according to claim 1 wherein the weight ratio of hydrogen chloride to sulfuric acid is about 1:10 to about 1:1.
Claim 7
Dependent Claim
37 words
A method for the surface treatment according to claim 1 wherein the acidic solution contains 1 part by volume of concentrated sulfuric acid, 1 part by volume of hydrochloric acid and 2 parts by volume of water.
Claim 8
Dependent Claim
28 words
A method for the surface treatment according to claim 1 wherein the resin is treated at a temperature of 0°-70° C. for about 1 minute to 1 hour.
Claim 9
Dependent Claim
27 words
A method for the surface treatment according to claim 1 wherein the resin is treated at a temperature of 25° C. for about 5 to 30 minutes.
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) | 1986-11-28 | 1987-05-30 | 1987-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-28 | 1991-05-30 | 1991-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-28 | 1995-05-30 | 1995-11-29 | $7700.00 | Window Closed / Lapsed |