Resilient tires and wheels – Tires – resilient – Anti-skid devices
Patent
1986-04-07
1987-06-02
Czaja, Donald E.
Resilient tires and wheels
Tires, resilient
Anti-skid devices
B60C 1100
Patent
active
046695184
ABSTRACT:
Rubbery high trans-high vinyl diblock copolymers, blends of rubbery high trans copolymers and rubbery high vinyl polymers, and mixtures (alloys or blends) of said diblock copolymers, high trans copolymers and high vinyl polymers are useful in producing tire treads exhibiting good processibility, good rolling resistance, skid resistance and abrasion resistance. The high trans block or copolymer comprises a copolymer of butadiene-1,3 and styrene and/or isoprene and the high vinyl block or polymer comprises polybutadiene or copolymers of butadiene and styrene and/or isoprene. These di-block copolymers, copolymers and polymers are made by solution polymerization. The diblock copolymer may be made by copolymerizing butadiene and styrene and/or isoprene using a Ba, Ca or Sr alcoholate, R.sub.2 Mg and R.sub.3 Al to from about 60 to 95% conversion to a high trans block and then adding (optionally more Bd with or without Sty and/or isoprene) a strong Lewis base and a Na, K or Rb alkoxide and continuing the polymerization to completion to obtain the high vinyl block of the di-block copolymer.
REFERENCES:
patent: 4310582 (1982-01-01), Stumpe, Jr.
patent: 4387756 (1983-06-01), Ogawa et al.
patent: 4387757 (1983-06-01), Ogawa et al.
Cohen et al., Macromolecules, 15, 1982, "Properties of Block Copolymers and Homopolymer Blends Comprised of 1,2-Polybutadiene and 1,4-Polybutadiene, pp. 370-375.
Chemical Abstracts, 100, 1984, 176245f.
Chemical Abstracts, 100, 1984, 176,242c.
Chemical Abstracts, 102, 1985, 26171f.
Aggarwal Sundar L.
Fabris Hubert J.
Hargis Ivan G.
Livigni Russell A.
Thomas George B.
Czaja Donald E.
GenCorp Inc.
Knable Goeffrey L.
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