kunststoffkompositionen made easier

摘要

P describes compositions of the resins to be lightened and their preparation. / p & & p & these compositions are the result of the cooking of compositions comprising hollow spheres inorganic or organic and a mixture consisting of: a. of a polybutadiene of low molecular weight and containing more than 50% of units 1,2; b. of a free radical generator is broken down to the - above 100°C; c. of a liquid polybutadiene with hydroxyl ends, carboxyl or amines; d. a multifunctional compound of elongation of the chain, and optionally from an unsaturated hydrocarbon monomer. / p & & p & polybutadiene a. preferably contains from 60 to 80% of units 1,2 and its number average molecular mass is preferably between 1 000 and 40 000). / p & & p & the resin compositions to be lightened, of the invention have a low density, a good resistance to compression and a low absorption of water, which makes them suitable for the manufacture of objects that have to withstand the hydrostatic compression by immersion, and more particularly, of the floats which can be used in great depths. / p