US3882260A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of coating shaped articles
Assignee: BASF SE
•
Filing: 1973-02-07
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Granted: 1975-05-06
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Expires: 1993-02-07
Abstract
Abstract Method of coating shaped articles of plastics which show a tendency to stick at ordinary temperatures, comprising the application of molten polyethylene, polypropylene, copolymers of ethylene and propylene or mixtures of said polymers having a molecular weight of from 2,000 to 20,000.
Inventors
- 👤 Heinz Mueller-Tamm
- 👤 Wolfgang Immel
- 👤 Heinrich Mohr
- 👤 Karl-Heinz Fauth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:36
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/04; C08J7/0427; C08J2423/00; Y; Y10; Y10T; Y10T428/00; Y10T428/26; Y10T428/266; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31913
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
61 words
A METHOD OF COATING SHAPED ARTICLES OF POLYISOBUTYLENE HAVING A MOLECULAR WEIGHT OFFROM 3X105 TO 6X106 (VISCOSITY AVERAGE) WHICH COMPRISES APPLYING TO THE SURFACE OF SAID SHAPED ARTICLES AS A COATING COMPOSITION FROM 10 TO 2000 G/M2 OF SHAPED ARTICLE SURFACE OF MOLTEN POLYETHYLENE, POLYPROPYLENE, ETHYLENE/PROPYLENE COPOLYMER OR MIXTURE OF SAID POLYMERS HAVING A MOLECULAR WEIGHT OF FROM 2,000 TO 20,000.
Claim 2
Independent Claim
61 words
A METHOD OF COATING SHAPED ARTICLES OF POLYISOBUTYLENE HAVING A MOLECULAR WEIGHT OFFROM 3X105 TO 6X106 (VISCOSITY AVERAGE) WHICH COMPRISES APPLYING TO THE SURFACE OF SAID SHAPED ARTICLES AS A COATING COMPOSITION FROM 10 TO 2000 G/M2 OF SHAPED ARTICLE SURFACE OF MOLTEN POLYETHYLENE, POLYPROPYLENE, ETHYLENE/PROPYLENE COPOLYMER OR MIXTURE OF SAID POLYMERS HAVING A MOLECULAR WEIGHT OF FROM 2,000 TO 20,000.
Claim 3
Dependent Claim
42 words
AMETHOD ASSET FORTH IN CLAIM 1 WHEREIN SAID SHAPED ARTICLES ARE HEATED IN A STREAM OF HOT AIR PRIOR TO THE COATING STEP WHEREBY THE TEMPERATURE OF THE SHAPED ARTICLES IS AT LEAST 5*C ABOVE THE MELTING POINT OF THE COATING COMPOSITION.
Claim 4
Dependent Claim
37 words
A method as set forth in claim 2 wherein said coating composition is applied at a rate of from 20 to 500 g/m2 and wherein said coating composition has a molecular weight of from 4,000 to 8,000.
Claim 5
Dependent Claim
75 words
A method as set forth in claim 2 wherein a material having a particle size of from 1 to 100 m Mu is incorporated in said coating composition and applied to said shaped surface, said material being selected from the group consisting of silicon dioxide, calcium carbonate, talcum, mica, kaolin, lamp black, coal dust, powdered graphite, zinc oxide, calcium oxide, titanium dioxide, metal powder, magnesia, glass micro-spheres, zinc stearate, dyes, pigments, powdered polyolefins and polysaccharides.
Claim 6
Dependent Claim
63 words
A shaped article of polyisobutylene having a molecular weight of from 3 X 105 to 6 X 106 (viscosity average), said shaped article being coated with a material selected from the group consisting of polyethylene, polypropylene, ethylene/propylene copolymer or mixtures of said polymers having a molecular weight of from 2,000 to 20,000, the thickness of said coating being from 0.02 to 0.5 mm.
Claim 7
Dependent Claim
63 words
A shaped article of polyisobutylene having a molecular weight of from 3 X 105 to 6 X 106 (viscosity average), said shaped article being coated with a material selected from the group consisting of polyethylene, polypropylene, ethylene/propylene copolymer or mixtures of said polymers having a molecular weight of from 2,000 to 20,000, the thickness of said coating being from 0.02 to 0.5 mm.
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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) | 1978-05-05 | 1978-11-04 | 1979-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-05 | 1982-11-04 | 1983-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-05 | 1986-11-04 | 1987-05-06 | $7700.00 | Window Closed / Lapsed |