US3785850A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of applying acrylic functional carbonate ester coating to plastic substrates using high energy ionising radiation
Assignee: PPG Industries Inc
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Filing: 1971-10-18
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Granted: 1974-01-15
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Expires: 1991-10-18
Abstract
Abstract Phosgene is reacted with a polyhydroxy containing compound to form a polychloroformate. The polychloroformate is then reacted with an acrylate containing one hydroxyl group in the presence of an acid acceptor to form the novel complex acrylate esters of this invention. The product is highly radiation-sensitive so that it may be polymerized by ionizing irradiation and forms a coating on plastic substrates which is hard, stain-resistant and abrasion-resistant.
Inventors
- 👤 G Parker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:11
CPC Classifications
C; C07; C07C; C07C68/00; C07C68/02; C08; C08J; C08J7/00; C08J7/12; C08J7/16; C08J7/18; C09; C09D; C09D4/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
18 words
The method of claim 1 wherein the total dosage of irradiation is from 0.2 to about 20 megarads.
Claim 2
Dependent Claim
11 words
The method of claim 1 wherein R'''' (OH)x is ethylene glycol.
Claim 3
Dependent Claim
12 words
The method of claim 1 wherein the acrylate is hydroxy ethyl acrylate.
Claim 4
Dependent Claim
12 words
The method of claim 1 wherein the plastic substrate is polymethyl methacrylate.
Claim 5
Dependent Claim
18 words
The method of claim 1 wherein the plastic substrate is the reaction product of phosgene and bisphenol A.
Claim 6
Dependent Claim
11 words
The method of claim 1 wherein the plastic substrate is polyethylene.
Claim 7
Dependent Claim
10 words
The coated substrate formed by the method of claim 1.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-14 | 1977-07-16 | 1978-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-14 | 1981-07-16 | 1982-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-14 | 1985-07-16 | 1986-01-15 | $7700.00 | Window Closed / Lapsed |