US4172912A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for adhering polyethylene to steel substrates
Assignee: Sumitomo Seika Chemicals Co Ltd
•
Filing: 1977-10-20
•
Granted: 1979-10-30
•
Expires: 1997-10-20
Abstract
Abstract A coating composite containing sulfochlorinated polyolefin having a sulfur content ranging from 0.2 to 2.5% by weight and a chlorine content ranging from 18 to 37% by weight is applied directly as an adhesive layer or is applied on one surface of a thermoplastic resin base to be contacted with a metal surface, which resin base is coated on the metal surface.
Inventors
- 👤 Kohji Noji
- 👤 Tetsuzo Arai
- 👤 Yasuhiko Okamoto
- 👤 Kunioki Kato
- 👤 Miyoshi Koyama
- 👤 Koichi Fujiki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:50
CPC Classifications
C; C09; C09J; C09J123/00; C09J123/26; C09J123/32; C09J123/34; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1328; Y10T428/31504; Y10T428/31678; Y10T428/31692; Y10T428/31699
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
92 words
A process for coating steel comprising the steps of interposing an intermediate adhesive layer having an excellent water resisting property between the surface of a steel and a coating of polyethylene, said layer consisting essentially of sulfochlorinated polyethylene having a chlorine content ranging from 20 to 35% by weight and a sulfur content ranging from 0.4 to 1.5% by weight, the sulfochlorinated polyethylene formed from polyethylene having a density less than 0.934 and a melt index ranging from 5 to 250, and adhering said layer to said steel and polyethylene by heating.
Claim 2
Dependent Claim
92 words
A process for coating steel comprising the steps of interposing an intermediate adhesive layer having an excellent water resisting property between the surface of a steel and a coating of polyethylene, said layer consisting essentially of sulfochlorinated polyethylene having a chlorine content ranging from 20 to 35% by weight and a sulfur content ranging from 0.4 to 1.5% by weight, the sulfochlorinated polyethylene formed from polyethylene having a density less than 0.934 and a melt index ranging from 5 to 250, and adhering said layer to said steel and polyethylene by heating.
Claim 3
Dependent Claim
27 words
A process according to claim 1 wherein the sulfochlorinated polyethylene and polyethylene are heated and extruded in the molten state respectively so as to coat the steel.
Claim 4
Dependent Claim
31 words
A process according to claim 1 wherein the sulfochlorinated polyethylene dissolved in a solvent is applied and dried on the steel surface and then a polyethylene base material is coated thereon.
Claim 5
Dependent Claim
36 words
A process according to claim 1 wherein powdered sulfochlorinated polyethylene is adhered to the steel surface and heated to be molten so as to cover said surface and then a polyethylene base material is coated thereon.
Claim 6
Dependent Claim
63 words
A process according to claim 1 wherein the polyethylene is a thermally contractible tube, the inner surface of which is provided with the layer of sulfochlorinated polyethylene, the portion to be coated is a steel pipe which is coated in advance with sulfochlorinated polyethylene and said thermally contractible tube is set onto said portion of the steel pipe and is followed by hot-melting.
Claim 7
Dependent Claim
37 words
The process according to claim 1 wherein said intermediate adhesive layer is applied on one surface of a polyethylene base material and then said base material is coated and hot melted onto the surface of the steel.
Claim 8
Dependent Claim
49 words
The process according to claim 6 wherein said polyethylene base material is in the form of a tape and is wrapped around the steel surface and heated so as to allow a part of sulfochlorinated polyethylene to come out from the wrapped ends, thereby adhering to the steel surface.
Claim 9
Dependent Claim
90 words
A process for coating steel comprising the steps of premixing sulfochlorinated polyolefin having a chlorine content ranging from 20 to 35% by weight and a sulfur content ranging from 0.4 to 1.5% by weight, the sulfochlorinated polyethylene formed from polyethylene having a density less than 0.934 and a melt index ranging from 5 to 250, with polyethylene in the proportion of 10 to 300 parts by weight of the latter per 100 parts by weight of the former and disposing said premixture on a steel surface to be hot-melted thereon.
Claim 10
Dependent Claim
90 words
A process for coating steel comprising the steps of premixing sulfochlorinated polyolefin having a chlorine content ranging from 20 to 35% by weight and a sulfur content ranging from 0.4 to 1.5% by weight, the sulfochlorinated polyethylene formed from polyethylene having a density less than 0.934 and a melt index ranging from 5 to 250, with polyethylene in the proportion of 10 to 300 parts by weight of the latter per 100 parts by weight of the former and disposing said premixture on a steel surface to be hot-melted thereon.
References Cited (Backward Citations)
CA729596A
Cited
US2630398A
Cited
US2663652A
Cited
US2757155A
Cited
GB790159A
Cited
US3049455A
Cited
US3051666A
Cited
US3348995A
Cited
US3415715A
Cited
US3547682A
Cited
US3592728A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-10-29 | 1983-04-30 | 1983-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-29 | 1987-04-30 | 1987-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-29 | 1991-04-30 | 1991-10-30 | $7700.00 | Window Closed / Lapsed |