摘要:
Thermotropic aromatic polyesters which contain condensed radicals of bis-.alpha., .omega.-(4-hydroxyphenyl)-n-alkanes, have high dimensional stability under heat and at the same time high thermal stability. They can be processed thermoplastically at temperatures below 370.degree. C.
摘要:
Thermotropic fully aromatic polyesters which contain radicals of p-hydroxybenzoic acid, iso- and/or terephthalic acid and 2,7-dihydroxynaphthalene condensed therein, having outstanding mechanical properties and accordingly are very easy to process.
摘要:
The invention relates to aqueous two-component polyurethane systems, a process for their production, and their use for the production of coatings having increased impact strength, high stability properties and outstanding optical properties.
摘要:
In a process for the chain-lengthening of gelatine the gelatine is brought into contact with a hardening agent which can activate the carboxyl groups of the gelatine. The result is a partially hardened gelatine which has advantageous properties as for the production of photographic layers.
摘要:
This invention relates to aqueous two-component polyurethane systems, to a process for producing them, and to their use for the production of coatings having an enhanced impact strength and good resistance to solvents.