Patent US2939475A successfully refreshed from Google Patents.
US4148945A
Expired / Lapsed
US
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Process of metal plating on plastics
Assignee: Dow Chemical Co
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Filing: 1974-02-04
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Granted: 1979-04-10
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Expires: 1994-02-04
Abstract
Abstract The thermoplastic polymer employed in this invention is a rubber modified unsaturated carboxylic acid or anhydride containing polymer which is prepared by polymerizing the monomers in the presence of the rubber in a finely divided form. The surface to be metallized is first aminated with aqueous hydroxylamine or hydrazine, then treated with a noble metal salt solution and thereafter treated with a reducing agent, as needed, to produce a metallized surface having a resistance of 100 ohms/sq. or less. The metallized surface can then be further plated by conventional means.
Inventors
- 👤 Leigh B. Bangs
- 👤 Carole K. Tuttle
- 👤 Syamalarao Evani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:35
CPC Classifications
C; C23; C23C; C23C18/00; C23C18/16; C23C18/31; C23C18/42; C23C18/44; H; H05; H05K; H05K3/00; H05K3/10; H05K3/18; H05K3/181; H05K3/38; H05K3/381
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
137 words
A process for metallizing plastic articles formed from a rubber modified unsaturated carboxylic acid or anhydride containing thermoplastic polymer which comprises the steps of (a) aminating the surface to be metallized by contacting it with an aqueous solution of hydroxylamine or hydrazine, (b) contacting the aminated surface with a noble metal salt solution and (c) thereafter, as needed to produce a metallized surface having a resistance of about 100 ohms/sq. or less, treating the surface with a reducing agent; wherein said polymer contains about 12 to 40 weight percent rubber, about 12 to 30 weight percent of said acid or anhydride and the balance to make 100 percent of one or more monomers copolymerized therewith and wherein said polymer is the product of polymerizing the monomers in the presence of the rubber in a finely divided form.
Claim 2
Dependent Claim
137 words
A process for metallizing plastic articles formed from a rubber modified unsaturated carboxylic acid or anhydride containing thermoplastic polymer which comprises the steps of (a) aminating the surface to be metallized by contacting it with an aqueous solution of hydroxylamine or hydrazine, (b) contacting the aminated surface with a noble metal salt solution and (c) thereafter, as needed to produce a metallized surface having a resistance of about 100 ohms/sq. or less, treating the surface with a reducing agent; wherein said polymer contains about 12 to 40 weight percent rubber, about 12 to 30 weight percent of said acid or anhydride and the balance to make 100 percent of one or more monomers copolymerized therewith and wherein said polymer is the product of polymerizing the monomers in the presence of the rubber in a finely divided form.
Claim 3
Dependent Claim
20 words
The process of claim 1 further comprising the step of depositing one or more metallic layers on the metallized surface.
Claim 4
Dependent Claim
11 words
The process of claim 1 wherein the noble metal is silver.
Claim 5
Dependent Claim
15 words
The process of claim 1 wherein the rubber content is about 16 to 22 percent.
Claim 6
Dependent Claim
17 words
The process of claim 1 wherein the acid or anhydride content is about 12 to 25 percent.
Claim 7
Dependent Claim
17 words
The process of claim 1 wherein the acid or anhydride content is about 14 to 20 percent.
Claim 8
Dependent Claim
15 words
The process of claim 1 wherein said polymer is a rubber modified styrene-maleic anhydride copolymer.
Claim 9
Dependent Claim
134 words
A process for metallizing plastic articles formed from a rubber modified unsaturated dicarboxylic acid anhydride containing thermoplastic polymer which comprises the steps of (a) aminating the surface to be metallized by contacting it with an aqueous solution of hydroxylamine or hydrazine. (b) contacting the aminated surface with a noble metal salt solution and (c) thereafter, as needed to produce a metallized surface having a resistance of about 100 ohms/sq. or less, treating the surface with a reducing agent; wherein said polymer contains about 12 to 40 weight percent rubber, about 12 to 30 weight percent of said anhydride and the balance to make 100 percent of one or more monomers copolymerizable therewith and wherein said polymer is the product of polymerizing the monomers in the presence of the rubber in a finely divided form.
Claim 10
Dependent Claim
134 words
A process for metallizing plastic articles formed from a rubber modified unsaturated dicarboxylic acid anhydride containing thermoplastic polymer which comprises the steps of (a) aminating the surface to be metallized by contacting it with an aqueous solution of hydroxylamine or hydrazine. (b) contacting the aminated surface with a noble metal salt solution and (c) thereafter, as needed to produce a metallized surface having a resistance of about 100 ohms/sq. or less, treating the surface with a reducing agent; wherein said polymer contains about 12 to 40 weight percent rubber, about 12 to 30 weight percent of said anhydride and the balance to make 100 percent of one or more monomers copolymerizable therewith and wherein said polymer is the product of polymerizing the monomers in the presence of the rubber in a finely divided form.
Claim 11
Dependent Claim
11 words
The process of claim 8 wherein the noble metal is silver.
Claim 12
Dependent Claim
20 words
The process of claim 8 further comprising the step of depositing one or more metallic layers on the metallized surface.
Claim 13
Dependent Claim
21 words
The process of claim 8 wherein the polymer is a rubber modified polymer of said anhydride and an alkenyl aromatic monomer.
Claim 14
Dependent Claim
15 words
The process of claim 11 wherein said polymer is a rubber modified styrene-maleic anhydride polymer.
Claim 15
Dependent Claim
12 words
The process of claim 11 wherein said rubber is a styrene-butadiene rubber.
Claim 16
Dependent Claim
22 words
The process of claim 11 wherein the rubber comprises about 16 to 22 percent and the anhydride about 12 to 25 percent.
Claim 17
Dependent Claim
14 words
The process of claim 14 wherein the anhydride comprises about 14 to 20 percent.
Claim 18
Dependent Claim
13 words
The process of claim 8 wherein aqueous hydrazine is used in step (a).
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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) | 1982-04-09 | 1982-10-09 | 1983-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-09 | 1986-10-09 | 1987-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-09 | 1990-10-09 | 1991-04-10 | $7700.00 | Window Closed / Lapsed |