US3650874A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adhering rubbers and polyolefines by other than peroxide curing agents
Assignee: Pneumatiques Caoutchouc Manufacture et Plastiques Kleber Colombes SA
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Filing: 1969-03-06
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Granted: 1972-03-21
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Expires: 1989-03-06
Abstract
Abstract A rubber is bonded to a polyolefine by placing on the rubber a layer of polyolefine of melt index less than 0.15 and applying heat and pressure. If the rubber is an unvulcanized mix containing a vulcanizing agent, the temperature, pressure and duration should be sufficient to cause vulcanization of the rubber. If the rubber is partly or fully vulcanized the pressure used is at least 10 kg./cm.2 and the polyolefine is heated to at least its melting point. The low melt index polyolefine may be in the form of a powder, powder suspension, film or sheet, which can thus be used to adhere a higher melt index polyolefine to the rubber. Various integral rubber/polyolefine articles are produced by this method.
Inventors
- 👤 Claude Job
- 👤 Yvan Landler
- 👤 Pierre Henri Lebel
- 👤 Lucile Meillat
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:26
CPC Classifications
B; B29; B29D; B29D23/00; B29D23/001; C; C08; C08J; C08J7/00; C08J7/04; C08J7/0427; C08J7/043; C08J7/046; C08J7/052; B29K; B29K2021/00; C08J2321/00; C08J2423/00; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31692; Y10T428/31696; Y10T428/31707; Y10T428/31826; Y10T428/31833; Y10T428/31837
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
55 words
A method for bonding two rubbers by the method as claimed in claim 1, which consists in positioning said selected polyolefine between and in contact with both said two rubbers, and subjecting the assembly to heat and pressure, at least one of said two rubbers being vulcanized by a vulcanizing agent other than a peRoxide.
Claim 2
Dependent Claim
12 words
A method according to claim 1, wherein said selected polyolefine is polyethylene.
Claim 3
Dependent Claim
82 words
A method for bonding a rubber to a polyolefine of melting index greater than 0.15, when measured by the method set forth in claim 1, by the method claimed in claim 1, which consists in positioning said selected polyolefine having a melting index less than 0.15 between and in contact with said rubber and said polyolefine of melting index greater than 0.15, and subjecting the assembly to heat and pressure, said rubber being vulcanized by a vulcanizing agent other than a peroxide.
Claim 4
Dependent Claim
21 words
A method according to claim 1, wherein the polyolefine of melting index less than 0.15 is in a form of powder.
Claim 5
Dependent Claim
41 words
A method according to claim 1, wherein said rubber is in the form of an unvulcanized rubber mix, a sulphur-containing vulcanizing agent is present, and the temperature and pressure are of magnitude and duration sufficient to cause vulcanization of the rubber.
Claim 6
Dependent Claim
14 words
A method according to claim 6, wherein the pressure is at least 2 kg./cm.2.
Claim 7
Dependent Claim
35 words
A method according to claim 1, wherein the rubber is partly vulcanized previous to said bonding and the pressure is less than 10 kg./cm.2 and the polyolefine is heated to at least its melting point.
Claim 8
Dependent Claim
37 words
A method according to claim 1, wherein the rubber has been vulcanized prior to contacting it with the selected polyolefine the applied pressure being at least 10 kg./cm.2, and the temperature is sufficient to soften the polyolefine.
Claim 9
Dependent Claim
21 words
A method according to claim 6, wherein the vulcanizing agent is, a material having a sulphur base and a metal oxide.
Claim 10
Dependent Claim
91 words
A composite product comprising at least two elements bonded in contact to one another, one said element being of rubber vulcanized by a sulphur-containing vulcanizing agent and the other of said two elements being a polyolefine selected from the group consisting of polymers and copolymers of one and more mono-olefines having not more than four carbon atoms and mixtures of these polymers and copolymers and having a melting index of less than 0.15 when measured according to the standard ASTM 1238-57 T modified by adding a supplementary load of 3 kg.
Claim 11
Dependent Claim
10 words
A tube comprising a composite product according to claim 11.
Claim 12
Dependent Claim
42 words
Method according to claim 1, wherein the layer of polyolefine is applied in contact with the rubber in the form of a suspension of particles not exceeding a size of 100 Mu of said selected polyolefine of melting index less than 0.15.
Claim 13
Dependent Claim
32 words
A product according to claim 11, comprising at least one part of rubber and at least one part of a polyolefine of low melt index in which the polyolefine is a reinforcement.
Claim 14
Dependent Claim
20 words
A product as claimed in claim 14, wherein the reinforcement of polyolefine is in the form of a continuous layer.
Claim 15
Dependent Claim
25 words
A product according to claim 14, wherein the reinforcement of polyolefine is in the form of a helix of which the coils are not adjacent.
Claim 16
Dependent Claim
50 words
A product according to claim 11, wherein said rubber element is in the form of a sheet at least part of the surface of which has a layer of said selected polyolefine of melting index less than 0.15 in contact with and bonded to the rubber surface of said sheet.
Claim 17
Dependent Claim
18 words
A product according to claim 12, wherein the outer wall of the tube is coated with said polyolefine.
Claim 18
Dependent Claim
18 words
A product according to claim 12, wherein the inner wall of the tube is coated with said polyolefine.
Claim 19
Dependent Claim
42 words
A product according to claim 17, wherein said layer of said selected polyolefine of melting index less than 0.15 has bonded on at least part of its surface remote from the rubber sheet a layer of a polyolefine of higher melting index.
Claim 20
Dependent Claim
14 words
A product according to claim 17, wherein said rubber sheet is a rubberized fabric.
Claim 21
Dependent Claim
47 words
A process of manufacturing a product according to claim 1, wherein the layer of polyolefine is applied on the rubber sheet before vulcanization, and then the whole is brought To a temperature equal or greater than 140* C. under a pressure equal or greater than 2 kg./cm.2.
Claim 22
Dependent Claim
20 words
A process according to claim 22, including applying the polyolefine of low melt index in the form of a film.
Claim 23
Dependent Claim
51 words
A process according to claim 22, including placing on the layer of polyolefine of low melt index, a layer of a polyolefine of higher melt index, and subjecting the assembly to a temperature equal to or greater than 140* C. and to a pressure greater than or equal to 2 kg./cm.2.
Claim 24
Dependent Claim
69 words
A process according to claim 22, including applying the layer of polyolefine of low melt index as a powder to the rubber and placing on said layer of powder, a film or a part already formed of a polyolefine of higher melt index, and subjecting the assembly then to a temperature equal to or greater than 140* C. and to a pressure greater than or equal to 2 kg./cm.2.
Claim 25
Dependent Claim
37 words
A product according to claim 11 wherein said rubber element is bonded to a metal element by a part of its surface which is not bonded to said selected polyolefine having a melting index less than 0.15.
Claim 26
Dependent Claim
13 words
The process of claim 1, in which said polyolefin contains a thickening agent.
Claim 27
Dependent Claim
13 words
The process of claim 1, in which said polyolefin contains a wetting agent.
Claim 28
Dependent Claim
25 words
The process of claim 1, in which said polyolefin contains as a suspending medium a liquid selected from the group consisting of acetone and methanol.
Claim 29
Dependent Claim
19 words
The process of claim 24, in which said layer of polyolefine of higher melt index is an ethylene-propylene polymer.
References Cited (Backward Citations)
US3013915A
Cited
GB865806A
Cited
US3347817A
Cited
US3296061A
Cited
US3406732A
Cited
US3367909A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-03-21 | 1975-09-20 | 1976-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-21 | 1979-09-20 | 1980-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-21 | 1983-09-20 | 1984-03-21 | $7700.00 | Window Closed / Lapsed |