摘要:
The invention relates to a thermoplastic elastomer comprising a blend of a rubber and a thermoplastic resin, the rubber being at least partially cured with a phenolic curative. The invention is that, to overcome problems with surface cracking, the thermoplastic elastomer also comprises a hydrolysis-insensitive HALS-compound. The invention also relates to the preparation of such a thermoplastic elastomer.
摘要:
The invention relates to a plastics composition which contains a polymer, at least one hindered-amine light stabilizer (HALS compound) and at least one bridged amine compound having at least one N-bridgehead. Preferably the bridged amine compound is hexamethylenetetramine or diazabicyclo[2.2.2]octane or a derivative of either compound. Preferably the polymer is a propylene polymer or an acrylonitrile-butadiene-styrene copolymer (ABS). The plastics composition according to the invention has improved weather resistance.
摘要:
The invention relates to a composition of a thermoplastic segmented polyetherester copolymer with a strongly improved thermooxidative stability, consisting of: 1) a segmented polyetherester copolymer derived from terephthalic acid or naphthalene dicarboxylic acid, or an ester thereof, alkylene diol, polypropylene oxide glycol, which contains ethylene oxide end groups, and optionally a branching agent; 2) an effective amount of a stabilizer combination containing at least: (2a) at least one thermooxidative stabilizer chosen from the group of phenolic antioxidants and (2b) at least one thermooxidative stabilizer chosen from the group of aromatic amines; 3) optionally other additives. The composition is particularly suitable for application at high ambient temperatures and for applications in which the product obtained from the composition must over a long period be able to withstand deformations of at least 50 % without fracturing and is in contact with metal.
摘要:
The invention relates to a polyetherester copolymer composition having a strongly improved UV stability, which is eminently suitable for use in film. The polyestherester copolymer composition according to the invention contains 0.1-10 wt.% activated carbon and 0.05-3 wt.% of a hindered amine light stabilizer (HALS). Preferably, the contents are 0.5-3 and 0.2-1 wt.%, respectively. At a film thickness of 100 νm an increase in the life on the order of a factor 2, relative to the effect of the sum of the individual components, appears to be possible. Preferably, the molecular weight of the HALS is higher than 1500.
摘要:
The invention relates to a polyetherester copolymer composition having a strongly improved UV stability, which is eminently suitable for use in film. The polyestherester copolymer composition according to the invention contains 0.1-10 wt.% activated carbon and 0.05-3 wt.% of a hindered amine light stabilizer (HALS). Preferably, the contents are 0.5-3 and 0.2-1 wt.%, respectively. At a film thickness of 100 νm an increase in the life on the order of a factor 2, relative to the effect of the sum of the individual components, appears to be possible. Preferably, the molecular weight of the HALS is higher than 1500.
摘要:
The invention relates to a powder paint binder composition containing a compound comprising carboxylic acid units, a compound comprising hydroxyalkyl amide units one or more phosphite(s) optionally combined with one or more phenolic anti-oxidant(s) and either: a) one or more aromatic amine(s) or b) one or more phosphinic acid(s) according to formula (I) or (II): (I) or (II) where R1 = H, (C¿1?-C26) alkyl or (C6-C20) aryl; R?2¿ = H, (C¿1?-C26) alkyl or (C6-C20) aryl and R?3¿ = H, (C¿1?-C26) alkyl or (C6-C20) aryl.
摘要:
The invention relates to a copolyether ester composition protected against the influence of light that contains (1) a copolyether ester; (2) a UV-light-absorbing compound; (3) a hindered amine photostabiliser; (4) optionally a thermal-oxidative stabiliser chosen from the group comprising phenolic compounds; (5) optionally other additives, characterised in that the hindered amine photostabiliser is chosen from a group of compounds having the general formula (1). The composition according to the invention shows a very small amount of discolouration in ageing under the influence of light.
摘要:
The invention relates to a plastic composition that contains a polymer, at least one hindered amine light stabiliser (HALS compound) and at least one bridged amine compound containing at least one N bridgehead. Preferably the plastic composition contains a salt of a bridged amine compound containing at least one N bridgehead and a HALS compound having a molecular weight of less than 1000 g/mol, or a bridged amine compound containing at least one N bridgehead which is not a salt and a HALS compound having a molecular weight of more than 1000 g/mol.
摘要:
The invention relates to a process for the preparation of a thermoplastic elastomer comprising preparing a blend of a rubber and a thermoplastic resin, in which the rubber is at least partially vulcanized by using a phenolic curative. The invention is that, to overcome problems with surface quality, an effective amount of a Lewis base is added after the desired degree of vulcanization of the rubber is obtained. The invention also relates to a process for the preparation of a UV-stable thermoplastic elastomer.