US4180448A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparation of plastic molded articles having metal film
Assignee: Sakae Riken Kogyo Co Ltd
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Filing: 1978-12-13
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Granted: 1979-12-25
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Expires: 1998-12-13
Abstract
Abstract The present invention relates to a process for the preparation of plastic molded articles having a metal film and exhibiting a metallic luster, said process comprising (a) coating an ultraviolet-curing acrylic resin type undercoating paint on the surface of a plastic molded article and irradiating the molded article with ultraviolet rays to form a base coat layer, (b) forming a metal film layer of chromium or stainless steel on the base coat layer by a sputtering process, and (c) coating on the metal film layer a top coating paint comprising as main components an acryl polyol having an OH value of 10 to 200 and an acid value of 1 to 12 and a non-yellowing polyisocyanate and curing the top coating paint to form a top coat layer.
Inventors
- 👤 Yoshikazu Soshiki
- 👤 Hiroshi Sugiura
- 👤 Kouzi Onizawa
- 👤 Toshikatsu Togawa
- 👤 Minoru Kojima
- 👤 Tsukio Morikawa
- 👤 Naohiko Kurimoto
- 👤 Hiromitu Katou
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:53
CPC Classifications
B; B05; B05D; B05D7/00; B05D7/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
159 words
A process for the preparation of plastic molded articles having a metal film, which comprises the steps of (a) coating an ultraviolet-curing acrylic resin undercoating paint on the surface of a plastic molded article and irradiating the coated surface with ultraviolet rays to form a base coat layer, (b) forming on the base coat layer a metal film of chromium or stainless steel by the sputtering process under conditions of a degree of vacuum of 6×10 -5 to 1×10 -3 Torr, an argon pressure of 1×10 -4 to 5×10 -3 Torr, a voltage of 200 to 600 V and a cathode current density of 0.2 to 5 A/dm 2 , and (c) coating on the metal film a top coating paint comprising as main components an acryl polyol having an OH value of 10 to 200 and an acid value of 1 to 12 and a non-yellowing polyisocyanate and curing the coated paint to form a top coat layer.
Claim 2
Dependent Claim
159 words
A process for the preparation of plastic molded articles having a metal film, which comprises the steps of (a) coating an ultraviolet-curing acrylic resin undercoating paint on the surface of a plastic molded article and irradiating the coated surface with ultraviolet rays to form a base coat layer, (b) forming on the base coat layer a metal film of chromium or stainless steel by the sputtering process under conditions of a degree of vacuum of 6×10 -5 to 1×10 -3 Torr, an argon pressure of 1×10 -4 to 5×10 -3 Torr, a voltage of 200 to 600 V and a cathode current density of 0.2 to 5 A/dm 2 , and (c) coating on the metal film a top coating paint comprising as main components an acryl polyol having an OH value of 10 to 200 and an acid value of 1 to 12 and a non-yellowing polyisocyanate and curing the coated paint to form a top coat layer.
Claim 3
Dependent Claim
38 words
A process for the preparation of plastic molded articles having a metal film according to claim 1 wherein the base coat layer has a hardness not lower than HB as determined according to the method of JIS D0202.
Claim 4
Dependent Claim
39 words
A process for the preparation of plastic molded articles having a metal film according to claim 1 wherein the metal film of chromium or stainless steel formed by the sputtering process has a thickness of 300 to 2000 A.
Claim 5
Dependent Claim
62 words
A process for the preparation of plastic molded articles having a metal film according to claim 1 wherein the top coating paint comprises the acryl polyol and non-yellowing polyisocyanate in such amounts that the equivalent ratio OH/NCO of the OH groups of the acryl polyol to the NCO groups of the non-yellowing polyester is in the range of from 0.6 to 1.2.
Claim 6
Dependent Claim
34 words
A process for the preparation of plastic molded articles having a metal film according to claim 1 wherein the coefficient of thermal expansion of the plastic molded article is less than 20×10 -5 cm/cm/°C.
Claim 7
Dependent Claim
33 words
A process for the preparation of plastic molded articles having a metal film according to claim 1 wherein the material of the plastic molded article is an acrylonitrile-butadiene-sytrene copolymer or an acrylonitrile-styrene copolymer.
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-12-24 | 1983-06-25 | 1983-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-24 | 1987-06-25 | 1987-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-24 | 1991-06-25 | 1991-12-25 | $7700.00 | Window Closed / Lapsed |