US4228219A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aromatic polyether sulfone used as a prime coat for a fluorinated polymer layer
Assignee: Imperial Chemical Industries Ltd
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Filing: 1979-04-26
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Granted: 1980-10-14
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Expires: 1999-04-26
Abstract
Abstract A method of coating a substrate surface, which method comprises: (a) applying a primer composition to the substrate surface which primer composition comprises thermoplastic polymer material dispersed in an inert liquid diluent, at least 50% by weight of said theroplastic polymeric material being constituted by at least one thermoplastic aromatic polyethersulphone; (b) before the applied primer composition has become touch-dry, applying a dispersion of a tetrafluoroethylene polymer top-coat material in an inert liquid diluent over the coated substrate; and (c) removing the inert liquid diluent or diluents and sintering the combined coating of the primer and top-coat layers. The primer compositions do not in the claimed method, need to be dried and baked to exert an effective priming action.
Inventors
- 👤 Leslie R. J. Hoy
- 👤 Malcolm J. Saggers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:24
CPC Classifications
B; B05; B05D; B05D5/00; B05D5/08; B05D5/083; B05D7/00; B05D7/50; B05D7/52; B05D7/54; B05D7/542; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/3154; Y10T428/31544
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
98 words
A method of coating a substrate surface, which method comprises: (a) applying a primer composition to the substrate surface which primer composition comprises thermoplastic polymeric material dispersed in an inert liquid diluent, at least 50% by weight of said thermoplastic polymeric material being constituted by at least one thermoplastic aromatic polyethersulphone; (b) before the applied primer composition has become touch-dry, applying a dispersion of a tetrafluoroethylene polymer top-coat material in an inert liquid diluent over the coated substrate; and (c) removing the inert liquid diluent or diluents and sintering the combined coating of the primer and top-coat layers.
Claim 2
Independent Claim
98 words
A method of coating a substrate surface, which method comprises: (a) applying a primer composition to the substrate surface which primer composition comprises thermoplastic polymeric material dispersed in an inert liquid diluent, at least 50% by weight of said thermoplastic polymeric material being constituted by at least one thermoplastic aromatic polyethersulphone; (b) before the applied primer composition has become touch-dry, applying a dispersion of a tetrafluoroethylene polymer top-coat material in an inert liquid diluent over the coated substrate; and (c) removing the inert liquid diluent or diluents and sintering the combined coating of the primer and top-coat layers.
Claim 3
Dependent Claim
28 words
A method according to claim 1 wherein said thermoplastic polymeric material of the primer compositions contains substantially 100% by weight of the at least one thermoplastic aromatic polyethersulphone.
Claim 4
Dependent Claim
38 words
A method according to claim 1 wherein the at least one thermoplastic aromatic polyethersulphone is selected from the group consisting of polyethersulphones having repeating units of formulae ##STR6## alone or in conjunction with repeating units of formulae ##STR7##
Claim 5
Dependent Claim
20 words
A method according to claim 1 wherein the at least one thermoplastic aromatic polyethersulphone has reduced viscosity (RV) below 0.25.
Claim 6
Dependent Claim
21 words
A method according to claim 1 wherein the at least one thermoplastic aromatic polyethersulphone has particle size of below 25 μm.
Claim 7
Dependent Claim
16 words
A method according to claim 1 wherein the inert diluent of the primer composition is water.
Claim 8
Dependent Claim
66 words
A coated article which comprises at least one substrate surface which has adhering thereto a combined coating of a primer layer derived from a primer composition which comprises thermoplastic polymeric material dispersed in an inert liquid diluent, at least 50% by weight of said thermoplastic polymeric material being constituted by at least one thermoplastic aromatic polyethersulphone, and a top-coat layer derived from a tetrafluoroethylene polymer dispersion.
Claim 9
Dependent Claim
66 words
A coated article which comprises at least one substrate surface which has adhering thereto a combined coating of a primer layer derived from a primer composition which comprises thermoplastic polymeric material dispersed in an inert liquid diluent, at least 50% by weight of said thermoplastic polymeric material being constituted by at least one thermoplastic aromatic polyethersulphone, and a top-coat layer derived from a tetrafluoroethylene polymer dispersion.
Claim 10
Dependent Claim
21 words
A coated article which comprises at least one substrate surface which has been coated by a method according to claim 1.
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) | 1983-10-14 | 1984-04-14 | 1984-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-10-14 | 1988-04-14 | 1988-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-10-14 | 1992-04-14 | 1992-10-14 | $7700.00 | Window Closed / Lapsed |