Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Reexamination Certificate
2007-10-09
2007-10-09
Teskin, Fred (Department: 1713)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
C525S195000, C525S359300, C525S370000, C526S176000, C526S335000, C526S340000, C524S572000, C152S450000
Reexamination Certificate
active
11682027
ABSTRACT:
The present invention is directed to rubbery polymers, such as polybutadiene rubber or styrene-butadiene rubber, that contain tin coupling agents and provide desirable dispersion of carbon black in rubber compounds, such as for use in tire treads. The tin coupling agents are defined by the general formulas (I) (X3Sn)2O or (II) (X3Sn)O—(CH2)n—O(X3Sn), wherein X is a halogen and n is 1 to 20. A method of rubbery polymer synthesis, in one embodiment, involves mixing anionically polymerizable conjugated diene monomers with optional vinyl aromatic and an anionic-polymerization initiator, i.e., an organolithium compound, to form a mixture of living polymers. A tin coupling agent is added to the mixture of living polymers effecting polymerization conditions to form the tin coupled rubbery polymer. Such tin coupled rubbery polymers can be utilized in tire tread rubbers where the rubbery polymers may provide desirable wear properties without substantially sacrificing other performance characteristics.
REFERENCES:
patent: 5916957 (1999-06-01), Itoh et al.
patent: 6191234 (2001-02-01), Tadaki et al.
patent: 7091274 (2006-08-01), Thielen et al.
Glidwell, C., “The Structures, and Acid-Base Properties of Simple Inorganic Compounds Containing Stannyl Groups: An MNDO Study,” Chemica Scripta, 1986, vol. 26, pp. 367-371.
Armstrong Scott K.
Gerhan Jacob
Halasa Adel Farhan
Henning Steven Kristofer
Teskin Fred
The Goodyear Tire & Rubber Company
Wood Herron & Evans LLP
LandOfFree
Rubbery polymers containing tin coupling agents and rubber... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Rubbery polymers containing tin coupling agents and rubber..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rubbery polymers containing tin coupling agents and rubber... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3868628