Abstract: Novel low molecular weight vinyl polymers with chain terminating reactive groups and methods for their preparation are disclosed in which the low molecular weight polymers may be represented by the formula ##STR1## in which Y is ##STR2## R.sub.1 is hydrogen, lower alkyl having 1 to 4 carbon atoms, or halogen; R.sub.2 is hydrogen, lower alkyl having 1 to 4 carbon atoms, or halogen;X is halogen or aryl, or alkyl groups free from ethylenic unsaturation and hydroxyl groups; andn is from 5 to 50.These low molecular weight vinyl polymers are useful as prepolymers or precursors in the formation of novel species of certain types of high polymers such as, for example, of the polyester, polyurethane, polyurea, polyepoxy or polyamide types. The low molecular weight vinyls of this invention also have utility, for example, as plasticizers and lubricants.

Abstract: High impact polymer having broad rubber particle size distribution is prepared by a bulk-bulk-suspension three step polymerization process. A portion of a rubber-in-monomer solution is bulk polymerized to form a small average rubber particle size. The remaining portion of the same or a different rubber solution having the same or a different concentration is added to the system and stirred or polymerized until the desired distribution of rubber particle size is attained in the system. The system is then polymerized in suspension to form the desired high impact product.