Patents with Abstracts
In situ formation of hydroxy chain end functional polyolefins
Hydroxy-terminated polymers, that is, polymers containing hydroxy end groups, are useful intermediates in the preparation of high-performance polymer products. Such intermediates can be useful, for example, in the production of fuel or lube oil additives, thermoplastic elastomers such as polyurethanes, poly(urethane-urea)s, or polyamides, network polymers, star branched polymers, and block copolymers. Thus, there is a need for hydroxyl-terminated polymers, as well as convenient methods of producing the same. Storey and Morgan of The University of Southern Mississippi, Hattiesburg, Mississippi, prepared telecheic polyisobutylene using a cationic initiator. The initiator produces a quasiliving system which reacts with an acid to form the telechelic polymer.
Internal and external donor compounds for olefin polymerization catalysts
Chang of BASF, New Jersey, developed catalysts containing solid catalyst components of titanium, magnesium, halogen and a 1,8-naphthyl diaryloate internal electron donor compound; organoaluminum compounds and alkyl benzoate derivatives as external electron donors. The present invention also relates to methods of making the catalyst systems, and methods of polymerizing or copolymerizing alpha-olefins using the catalyst systems. (RDC 7/10/2012)
Elastomers, process for preparation, and uses thereof
Pawlow et al of Firestone Polymers, Ohio, developed elastomeric interpolymers comprising at least two, or more, cyclic olefin monomers that are prepared by ring opening metathesis polymerization, and that are characterized by having no crystallinity, a glass transition temperature (T.sub.g) of less than -80.degree. C., and a number average molecular weight (M.sub.n) of at least 40 kg/mole, and functionalized products thereof. A ring opening metathesis polymerization process for producing the elastomeric interpolymers having no crystallinity. Uses of the elastomeric interpolymers in applications such as rubber compounds, tires, and the like. Cores of golf balls that are prepared by using metathesis polymerization produced elastomeric interpolymers having 0 to about 30% crystallinity. (RDC 7/5/2012)
Polyolefin polymer containing vinyl groups at both ends and composition thereof
Ikenaga et al of Mitsui Chemicals, Japan, developed a polyolefin with vinyl groups at both ends. This polymer contains ethylene (a), an .alpha.-olefin (b) having 3 to 20 carbon atoms, and a cyclic olefin (c), and (1) a ratio of terminal vinylation is 70% or more relative to all of both ends of molecular chains, and (2) an intrinsic viscosity is in the range of 0.01 to 10 dl/g as measured in a decalin solution at 135.degree. C. The polymer of the present invention may be molded by a liquid injection molding, an injection molding, a transfer molding, a compression molding, and the like, and is excellent in acid resistance, gas permeation resistance, hydrolysis resistance, and dynamic fatigue resistance. From the polymer, a thermoplastic resin composition and a crosslinkable resin composition, and a crosslinked composition having excellent mechanical characteristics are obtained. (RDC 6/8/2012)
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Roger D. Corneliussen
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Copyright 2012 by Roger D. Corneliussen.
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** Date of latest addition; date of first entry is 6/8/2012.