Production of resins from solubilized scrap rubber, the resins thus produced and rubber compounds and products incorporating the resins |
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| 申请号 | US43977474 | 申请日 | 1974-02-05 | 公开(公告)号 | US3896059A | 公开(公告)日 | 1975-07-22 |
| 申请人 | FIRESTONE TIRE & RUBBER CO; | 发明人 | WAKEFIELD LYNN B; CRANE GRANT; KAY EDWARD LEO; | ||||
| 摘要 | Useful resins are prepared from scrap rubber by first heating the scrap rubber in the presence of a hydrocarbon liquid to effect solubilization of the rubber, and then contacting the solubilized rubber with an alkylation catalyst to form the resin. Optionally an aldehyde or ketone can be present in the contacting step. The resins, when incorporated into rubber compounds, enhance the tack and uncured tensile strength of the compounds and act to stabilize the contained elastomers against heat aging. The compounds which contain the resins can be made into shaped, vulcanized products, such as tires. | ||||||
| 权利要求 | 1. THE METHOD OF PRODUCING A RESIN BY THE SUCCESSIVE STEPS OF HEATING SOLID SCRAP RUBBER IN CONTACT WITH A HYDROCARBON LIQUID AT 400* TO 800*F. FOR 0.1 TO 50 HOURS TO CONVERT THE SOLID SCRAP RUBBER TO A FLUID, AND CONTACTING THE FLUID THUS PRODUCED WITH AN ALKYLATION CATALYST WHICH IS A LEWIS ACID, A PROTONIC ACID OR A CONDENSATION CATALYST IN AN AMOUNT WHICH IS FROM 0.1 TO 20% BY WEIGHT, BASED ON THE FLUID, AT A TEMPERATURE OF FROM 60*F. TO 300*F. FOR FROM 0.5 TO 50 HOURS, WHEREIN SAID SOLID SCRAP RUBBER IS NATURAL OR SYNTHETIC RUBBER OR BLENDS OF THE TWO, AND SAID SYNTHETIC RUBBER ISIS A HOMOPOLYMER OF BUTADIENE, ISOPRENE, CHLOROPRENE OR PIPERYLENE, OR A COPOLYMER OF THEM WITH EACH OTHER OR WITH STYRENE, ALPHA-METHYLSTYRENE, DIVINYLBENZENE, ETHYLENE, PROPYLENE, ISOBUTYENE, OR AN ETHYLENICALLY UNSATURATED CARBOXYLIC ACID ESTER OR NITRILE. 2. The method of claim 1, wherein from 2 to 40 percent by weight of an aliphatic aldehyde or ketone having up to 20 carbon atoms is present in the fluid before it is placed in contact with the catalyst. 3. The product of the method of claim 1. 4. The product of the method of claim 2. 5. A rubber compound containing from 1 to 50 parts by weight per hundred parts of rubber of the product of claim 3. 6. A rubber compound containing from 1 to 50 parts by weight per hundred parts of rubber of the product of claim 4. 7. A tire, a portion of which is made from the compound of claim 5. 8. A tire, a portion of which is made from the compound of claim 6. |
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