Abstract: The present invention is the synthesis of star polymers containing polyisobutylene (PIB) via the arm-first, core-last method. These polymers are superior in properties to known hydrogenated polyisoprene star-branched polymers due to their inherent lack of unsaturation.

Abstract: Elastomeric polymers comprising polymerized alpha-olefins or conjugated alkadienes are produced by cationic polymerization in the presence of titanium tetrachloride and an electron pair donor selected from pyridine or a non-hindered alkylpyridine. The polymers have very narrow, mono-modal molecular weight distributions such a achived by anionic polymerization. Polymerization of each monomer is terminated prior to broadening of the molecular weight distribution which significantly detracts from polymer properties.

Abstract: Blends of diaminoisopropylbenzene (DAIBP) and diaminoethylbenzene (DAEB) are provided for curing epoxy resins. The cured epoxy resins have increased tensile strength and slightly lower glass transition temperatures as compared with resins cured with either diamine alone.

Abstract: The use of a blend of diaminoisopropylbenzene (DAIPB) and an amine terminated butadiene nitrile liquid rubber (ATBN) for curing epoxy resins is provided. The DAIPB/ATBN blend produces a rubber toughened epoxy resin having improved tensile properties.

Abstract: Blends of diaminoisopropylbenzene (DAIPB) and diaminoethylbenzene (DAEB) are provided for curing epoxy resins. The cured epoxy resins have increased tensile strength and slightly lower glass transistion temperatures as compared with resins cured with either diamine alone.

Abstract: Novel star-branched ionomers having at least three branches covalently bonded to a central linking moiety; each branch contains a long inner block comprising non-ionic mers and an outer block comprising at least two ionic mers. Elasticity is provided by the non-ionic blocks and the ionic outer blocks aggregate at room temperature but dissociate and higher temperature, giving the star-branched ionomers thermoplastic characteristics. Star-branched polymers may be provided by growing a first (outer) block as a linear polymer, growing a second (inner) block from the end of the living polymer, linking three or more such linear block polymers to a central linker compound and selectively ionizing the first blocks.

Abstract: Method of promoting the cure of unsaturated polyester resins with a peroxide initiator at room or below room temperatures (low temperatures) by including as a promoter N,N-dimethyl-p-toluidine (DMPT) or a blend of DMPT and N,N-dimethyl-m-toluidine (DMMT) and to the polyester composition containing such promoter. The use of the DMPT or blend of DMPT and DMMT as a promoter provides a fast cure at low temperatures without loss of physical properties of the cured resins.