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US3694413A
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Polyurethane elastomer rendered anti-static by treatment with iodine
Assignee: Gates Rubber Co
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Filing: 1968-04-19
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Granted: 1972-09-26
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Expires: 1988-04-19
Abstract
Abstract This invention discloses the use of certain halogen, and compounds thereof in order to minimize the static tendency of certain types of polymeric substances such as polyethylene terephthalate, rayon, polypropylene, polyvinyl chloride and polyurethane.
Inventors
- 👤 Richard R Batzer
- 👤 William H Reichardt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:49
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/04; C08J7/06; C08J7/044; C08K; C08K3/00; C08K3/01; C08K3/017; Y; Y10; Y10S; Y10S524/00; Y10S524/91
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
65 words
An antistatic power transmission belt made of polymeric material wherein the non-reinforcement portions of the belt such as the body portion are manufactured substantially from a polyurethane rubber, obtained by reacting polyisocyanate with a polyether or polyester polyol containing terminal hydroxy groups wherein the improvement comprises non-reinforcement portions comprising polyurethane rubber which has been treated with iodine or a mixture of iodine and potassium iodide.
Claim 2
Independent Claim
45 words
The method of minimizing static build-up and discharge characteristics of an article of manufacture consisting of polyurethane rubber comprising a step of treating the polyurethane rubber by immersing the article in an iodine and potassium-iodide solution, removing and allowing the thereby coated article to dry.
Claim 3
Independent Claim
68 words
A method of minimizing static build-up and discharge characteristics of a polyurethane article of manufacture wherein the improvement comprises curing and polymerizing a polyurethane rubber formed by reacting a material from the group consisting of a polyether or polyester containing terminal hydroxy groups with an organic isocyanate and subsequent to the curing of said article of manufacture, treating the polyurethane article with a solution of iodine and potassium-iodide.
Claim 4
Dependent Claim
98 words
In a method of minimizing the static discharge from a polyurethane power transmission belt, in which the polymeric portion of said belt comprises a polyurethane rubber obtained by curing a liquid polymerizable polyurethane mixture which is the reaction product of a polyisocyanate and a polyether or polyester polyol containing terminal hydroxy groups, the improvement comprising incorporating from about 0.25 to about 5.0 parts by weight of elemental iodine based on the weight of the polyurethane by reducing said iodine to very small particle size and incorporating said iodine within said polymerizable mixture, and then molding said polymerizable mixture.
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) | 1975-09-26 | 1976-03-27 | 1976-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-26 | 1980-03-27 | 1980-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-26 | 1984-03-27 | 1984-09-26 | $7700.00 | Window Closed / Lapsed |