Abstract: A mixture of a polyester, such as poly(ethylene terephthalate) PET, and a second polymer which is polyacrylamide, polymethacrylamide or copolymer of acrylamide or methacrylamide when extrusion compounded exhibits a lower residual acetaldehyde content than does PET alone when similarly treated. The invention pertains to any polyester used in the manufacture of bottles or containers which in turn are used to store consumer materials, especially food, beverages and most especially water.

Abstract: A monohydroxysilane polysulfide of the formula: in which the radicals R, which may be identical or different, are hydrocarbon groups preferably comprising from 1 to 15 carbon atoms; the radicals R′, which may be identical or different, are divalent linking groups preferably comprising from 1 to 18 carbon atoms; x is greater than or equal to 2. This hydroxysilane is in particular a bis-(propyidimethylsilanol) polysulfide. A process for obtaining such a hydroxysilane by alcoholysis and/or hydrolysis of a halogenated organosilane, followed by a sulfuration stage. Use of this hydroxysilane as a coupling agent.