Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1987-10-15
1990-06-19
Lipman, Bernard
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
5253328, 5253324, 5253331, 5253332, 525279, 525280, 525386, C08F 830
Patent
active
049354710
ABSTRACT:
Polydiene rubbers are commonly compounded with carbon black in making a wide variety of rubber articles including tires, hoses and belts. It is generally desirable for the carbon black to be well dispersed throughout the polydiene in order to attain optimal physical properties. For instance, the traction and rolling resistance of tires which are made utilizing such rubbers can be improved by better dispersing the carbon black throughout the polydiene. The subject invention discloses a technique for capping polydienes in order to improve their affinity for carbon black. The present invention more specifially reveals a process for preparing a polydiene having a high level of affinity for carbon black which comprises reacting a metal terminated polydiene with a capping agent selected from the group consisting of (a) halogenated nitriles having the structural formula X--A--C.tbd.N where X represents a halogen atom and wherein A represents an alkylene group containing from 1 to 20 carbon atoms, (b) heterocyclic aromatic nitrogen containing compounds, and (c) alkyl benzoates. Both ends of polydiene chains can be capped with polar groups by utilizing functionalized initiators, such as lithium amides.
REFERENCES:
patent: 3135716 (1964-06-01), Uraneck et al.
patent: 3144429 (1964-08-01), Strobel
patent: 3177190 (1965-04-01), Hsieh
patent: 3178398 (1965-04-01), Strobel et al.
patent: 3402162 (1968-09-01), Strobel
patent: 3576908 (1971-04-01), Brack
patent: 3590008 (1971-06-01), Hausley
patent: 3766301 (1973-10-01), De La Mare et al.
patent: 3860566 (1975-01-01), Zelinski et al.
patent: 4077893 (1978-03-01), Kiovsky
patent: 4117036 (1978-09-01), Honda et al.
patent: 4677153 (1987-06-01), Kitahara et al.
Halasa Adel F.
Matrana Barry A.
Robertson-Wilcox Sylvia E.
Lipman Bernard
Rockhill Alvin T.
The Goodyear Tire & Rubber Company
LandOfFree
Capped polydienes does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Capped polydienes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Capped polydienes will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2260787