Abstract: Organic prepolymer fillers capable of curing and reacting chemically with elastomers to form covalent bonds therewith are mixed with elastomers to form reinforcing domains with diameters of from 0.01 to about 50 microns, and when the mixture is cured, the mechanical strength of the elastomer is increased. In many cases, the thermal stability and/or the hydrolytic stability will also be increased.

Abstract: Blends of polyetherimides and polyamideimides have been found to be useful in the coating and molding arts.

Abstract: Condensation polymers or addition polymers which contain sterically hindered polyalkylpiperidine groups are proposed as light stabilizers for plastics. The polymers concerned are relatively low-molecular polymers and a difunctional derivative of a polyalkylpiperidine is additionally used for the manufacture of these. The piperidine radical can be present in the main chain or as a side group of the polymeric stabilizer. Polymeric stabilizers of this type do not tend to migrate out of the plastic or to be removed by extraction; they are therefore very permanent in use.

Abstract: Elastomeric high molecular weight alternating and random block copolymers are disclosed which comprise blocks of a soft carborane-siloxane elastomer and blocks of a high performance rigid polymer. Methods for preparing such block copolymers are also disclosed. These copolymers exhibit the advantages of high temperature elastomers while allowing the use of conventional thermoplastic fabrication techniques.