US4902573A
Expired / Lapsed
US
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Method for antistatic finishing of adhesive thermoplastic coatings
Assignee: Bayer AG
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Filing: 1988-08-22
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Granted: 1990-02-20
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Expires: 2008-08-22
Abstract
Abstract The invention relates to a method for the production of shaped plastic parts which are provided with an antistatic adhesive thermoplastic coating; according to the method, the adhesive thermoplastic coating is coated with a solution which contains a binder and a suitable oxidant for the oxidative polymerization of 5- or 6-membered heterocyclic compounds which have nitrogen or sulphur as heteroatoms, and the coating thus obtained is treated with a solution of the 5- or 6-membered heterocyclic compound.
Inventors
- 👤 Friedrich Jonas
- 👤 Werner Waldenrath
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:54
CPC Classifications
C; C08; C08G; C08G61/00; C08G61/12; C08G61/122; C08J; C08J7/00; C08J7/04; C08J7/0427; C08J7/043; C08J7/044; C08J7/052; C09; C09J; C09J7/00; C09J7/20; C09J7/22; C09J7/30; C09J7/35; C08J2465/00; Y; Y10; Y10T; Y10T428/00; Y10T428/31504
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
74 words
A method for the production of a shaped plastic part provided with an antistatic adhesive thermoplastic coating, which comprises the steps: (a) coating an adhesive thermoplastic coating with a solution which contains a binder and a suitable oxidant for the oxidative polymerization of a 5- or 6-membered heterocyclic compound which contains nitrogen or sulphur as the heteroatom, and (b) treating the coating thus obtained with a solution of the 5- or 6-membered heterocyclic compound.
Claim 2
Independent Claim
74 words
A method for the production of a shaped plastic part provided with an antistatic adhesive thermoplastic coating, which comprises the steps: (a) coating an adhesive thermoplastic coating with a solution which contains a binder and a suitable oxidant for the oxidative polymerization of a 5- or 6-membered heterocyclic compound which contains nitrogen or sulphur as the heteroatom, and (b) treating the coating thus obtained with a solution of the 5- or 6-membered heterocyclic compound.
Claim 3
Dependent Claim
14 words
The method of claim 1, wherein the 5- or 6-membered heterocyclic compound is pyrrole.
Claim 4
Dependent Claim
97 words
The method of claim 1, wherein the solution which is used in step (a) for the coating of the adhesive thermoplastic coating comprises (α) the oxidant for the oxidative polymerization of the heterocyclic compound (β) an organic polymeric binder which is not soluble in water and (γ) an organic solvent, and wherein in step (b) the coated adhesive thermoplastic coating is treated with a solution of the heterocyclic compound in such an organic solvent in which the coated adhesive thermoplastic and the substances, oxidant and organic polymeric binder applied to this in step (a) are not soluble.
Claim 5
Dependent Claim
51 words
The method according to claim 3, wherein in step (a) the organic solvent is removed from the coating obtained and wherein the coating obtained after step (b) is washed with water after its treatment with the solution of the heterocyclic compound and after removal of the organic solvent in step (b).
Claim 6
Dependent Claim
25 words
The method of claim 1, wherein the thickness of the antistatic coating applied to the adhesive thermoplastic coating is 0.1 to 3.0 μm after drying.
Claim 7
Dependent Claim
30 words
The method of claim 5, wherein the thickness of the antistatic coating applied to the adhesive thermoplastic coating is at most 50% of the thickness of the adhesive thermoplastic coating.
Claim 8
Dependent Claim
29 words
The method of claim 5, wherein the thickness of the layer applied to the adhesive thermoplastic coating is 2 to 50% of the thickness of the adhesive thermoplastic coating.
Claim 9
Dependent Claim
21 words
The method of claim 1, wherein the shaped plastic part provided with an antistatic adhesive thermoplastic coating is a plastic film.
Claim 10
Dependent Claim
34 words
The method of claim 1, wherein in steps (a) and (b) also the surface of the shaped plastic part not covered with adhesive thermoplastic is coated and treated and antistatically finished in this manner.
Claim 11
Dependent Claim
33 words
The method of claim 1, wherein a salt of trivalent iron which is derived from an organic or an inorganic acid having an organic radical is used as the oxidant in step (a).
Claim 12
Dependent Claim
40 words
The method of claim 1, wherein a salt of trivalent iron which is derived from an aromatic sulphonic acid or an aromatic sulphonic acid which is substituted by a C 1 -C 20 -alkyl group is used as the oxidant.
Claim 13
Dependent Claim
11 words
A shaped plastic part prepared by the method of claim 1.
References Cited (Backward Citations)
No citation records indexed.
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1993-02-19 | 1993-08-21 | 1994-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-02-19 | 1997-08-21 | 1998-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-02-19 | 2001-08-21 | 2002-02-20 | $7700.00 | Window Closed / Lapsed |