Abstract:
Hydantoin oligomers and polymers are produced by reacting polyglycine esters with an isocyanate of the formula OCN - R'''''' (CO - Z)n, wherein R'''''' is a hydrocarbon radical, Z is an alkoxy or aroxy radical and n is an integer from 1 to 4. In this reaction di- or polyisocyanates may be used additionally.
Abstract:
AND 5 TO 50 MOL% OF STRUCTURAL UNITS CONTAINING HYDANTOIN RINGS AND HAVING THE GENERAL FORMULA
The invention relates to copolyamides which have an extremely low water absorption capacity of 1 to 3.5 % but remarkably high tensile strengths of between 7 and 20 g/dtex and moduli of elasticity of between 500 and 11.000 kg.wt/mm2. The copolyamides comprise of from 50 to 95 mol.% of structural units of the general formula
Abstract:
High molecular weight aromatic copolyamides which contain a small proportion of structural units having hydantoin rings are disclosed. The presence of hydantoin ring units in the copolyamide results in an increased moisture absorption capacity. By using small amounts of hydantoin units, the good physical properties of the corresponding hydantoin-free polyamide are substantially retained while the moisture absorption is significantly increased. Larger amounts of hydantoin units than contemplated (15 mole % and more) do not improve the moisture absorption further and adversely affect the physical properties. The copolyamides are useful in textile applications in which the improved moisture absorption serves to make clothing prepared from such textiles more comfortable.
Abstract:
e of an acrylonitrile polymer containing at least 60% by weight of acrylonitrile in copolymerized form containing as an antistatic additiv from 0.5 to 15 % by weight, based on the total mixture, of at least one polyether polyurethane compound of the general formula
in which Z represents the radical
or R, where R denotes a C1-18-alkyl, cycloalkyl, aryl, aralkyl or alkaryl radical said radical being substituted by halogen or alkyl or not, R'' represents an alkylene, cycloalkylene, arylene, aralkylene or alkarylene radical, said radical being substituted by halogen or alkyl or not, p and n denote integers of from 5 to 50 being identical
or different (when Z R) and m represents an integer of from 0 to 10 when Z denotes the group
or it represents an integer of from 1 to 10 when Z denotes the group R, and q represents the integer 1 (when Z R) or an integer of from 0 or 1
Abstract:
New thermally stable aromatic polyamides that are soluble in organic solvents, which polyamides contain quinazolone ring systems and which are produced by poly-condensation of aromatic diamines having one or two quinazolone ring systems in their molecule and aromatic dicarboxylic acid dihalides.
Abstract:
This invention relates to synthetic fibres, threads and foils of polymer with permanent antistatic properties which contain 0.5 to 15 percent by weight of polyethers containing hydantoin rings. Polyethers containing hydantoin rings according to the invention are well compatible with the polymers and well resistant against washing.
Abstract:
The invention relates to shaped articles, especially filaments, fibres and foils of acrylonitrile polymers containing as antistatic additives polyether polyurethanes of the general formula R-NHCO-(OCH2CH2)n-A-(CH2CH2O)n-(COHN-R''-NHCO-(OCH2-CH2)n-A(CH2CH2O)n)p-OCNH -R
Abstract:
This invention relates to high molecular weight aromatic copolyamides which contain quinazolindione structures. They can be obtained by copolycondensation of quinazolinedione diamines with mixtures of 25 to 99 mol-% of isophthalic acid dichloride and 1 to 75 mol-% terephthalic acid dichloride.