摘要:
A tough and long-lasting adhesion of polyolefins to metal substrates is realized by means of a process comprising the following four process steps, carried out in succession:(a) mechanical cleaning of the metal surface;(b) treatment of the metal surface with a water-alcohol solution containing at least an alkoxysilane and boric acid;(c) thermal treatment of the surface coming from the (b) step;(d) treatment of the so-treated surface with a polyolefin based composition, containing zeolites and carbon black.
摘要:
A thermoplastic composition based on non-polar organic polymers and crystalline zeolites in acid form of which the exchangeable ions are totally or partly substituted by H.sup.+ ions, the composition having strong adhesion to metals, the invention also relating to composite objects obtainable therefrom.
摘要:
A thermosetting organosiloxanic composition for protective coatings consists of a solvent and of the reaction product of four components, each one selected from one of following classes:(a) aminoalkoxysilanes;(b) formaldehyde or substances able to release formaldehyde;(c) alkyl- or alkenyl-acyloxy-silanes;(d) water;and is obtained by interreacting metered amounts of (a) and (b) components, by operating in the absence of solvents or diluents, and, separately, metered amounts of (c) and (d) components, by operating in an alcoholic solvent, and then mixing together the two reaction products obtained.Also a process is disclosed for polycarbonate sheets coating, by means of the above compositions.
摘要:
This invention relates to organosiloxane compositions which have application as protective coatings for soft substrates. The compositions of the invention include a substituent selected from each of the following classes of compositions: organo-alkoxysilanes; polyoxymethylenes; monocarboxylic organic acids; and optionally inorganic hydroxyacids. The coatings formed form these compositions have properties as adhesion promoters and are abrasion resistant.
摘要:
Metallizable, thermoweldable polyolefin films, endowed with good gas-barrier properties, are obtained by means of a process which comprises the following steps, carried out in sequence:(a) treatment of the surface of the film with an argon plasma;(b) deposition of a thin layer of liquid alkoxy-silanes on the surface of the so-treated film;(c) treatment of the alkoxy-silane coated film with an argon-oxygen plasma.