Abstract:
Higher molecular weight ester group containing isocyanates are provided. These isocyanates are eminently well suited as treating compounds for fabrics which contain keratin fibres.
Abstract:
Polyurethane urea elastomers with novel dissolution behavior and which are synthesized from polycarbonate macrodiols, diisocyantes and diamines and which can be prepared and dissolved in aqueous solvents. These elastomers have the advantage of being less of a physiological hazard, more resistant to common solvents and require less emulsifiers and dispersion aid.
Abstract:
A process for the preparation of stable polyurethane urea solutions by chain lengthening with bifunctional hydrazide compounds prepolymers prepared from dihydroxy compounds and excess 1-isocyanato-3-isocyanato-methyl-3,5,5trimethylcyclohexane. The polyurethane ureas dissolved in a mixture of water, aromatic hydrocarbons and aliphatic alcohols can be used for producing coatings which have exceptional light fastness.
Abstract:
A polyurethane adapted for making non-ionic aqueous polyurethane dispersions without an added emulsifier is prepared by reacting a conventional organic diisocyanate and an organic compound having groups reactive with isocyanato groups and having a side chain which contains repeating -O-CH2-Ch2 ) groups. Latices prepared from the polyurethane may be used to prepare films and coatings having improved physical properties.
Abstract:
A process for the production of polyurethane coatings having high resistance to light, solvents, bending and abrasion. The process consists of reacting prepolymers based on cycloaliphatic and aliphatic diisocyanates in equimolar quantitative ratios with special chain extending agents in soft solvents, adding special polyisocyanates to the resulting solutions and then letting the resulting tack free coating set until crosslinking takes place.
Abstract:
This invention relates to bonding coats and top coats made of aliphatic, segmented polycarbonate-polyurea elastomers for coating textile substrates. The coats are applied to the substrates from their solutions by the reverse roll coating process. The coating used has the advantage of providing resistance to hydrolysis, light fastness, unlimited pot life and can be prepared with inexpensive and physiologically harmless solvents. The synthetic leather has a high abrasion resistance, high folding strength, high flexibility in the cold and resistance to alcohol.