Synonyms: IRGANOX ;IRGANOX WL;Einecs ; ANTIOXIDANT ;ylester,calciumsalt();ANTIOXIDANT (IRGANOX );calciuM. Irganox® Recommended use of the chemical and restriction on use. Recommended use*: stabilizer. Unsuitable for use: This material is. Used as an antioxidant for polypropylene fibers. Offers good processing stability. Provides very high extraction resistance and extreme low volatility.
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Modified weatherable thermoplastic resin molding compositions and articles molded therefrom.
Suitable dicarboxylic acids are linear and branched saturated aliphatic dicarboxylic acids, aromatic dicarboxylic acids and cycloaliphatic dicarboxylic acids. November 27. Without the additives of this invention, The solution viscosity is 0. Table 1 relating to Examples of this invention addition of tetracarboxylic dianhydride and hydroxyphenylalkylphosphonic acid ester or half-ester shows a marked increase in intrinsic viscosity, thereby indicating an increase in molecular weight.
Suitable substituents of the phenyl or naphthyl ieganox are typically groups. Other additives, for example, plasticisers, lubricants, emulsifiers, pigments, optical brighteners, flameproofing agents, antistatic agents and blowing agents, for mixtures of recyclates in particular co-compatibilisers, typically copolymers, preferably block copolymers, of styrene with butadiene and optionally acrylonitrile.
Year of fee payment: The present invention relates to a process for increasing the molecular weight of polyesters and to the polyesters obtainable by said process. UV absorbers and light stabilisers 2.
Other suitable co-compatibilisers contain in particular irgaonx groups, for example maleic anhydride-styrene copolymers or graft polymers containing acrylic acid groups.
A mixture of tetracarboxylic dianhydrides of different structure may also be used. LI Free format text: NL Ref legal event code: A further preferred form comprises the polyester recyclates originating from domestic irgnaox industrial waste or from useful material collections, from production waste or from obligatory retumables. The amounts and the results obtained are set forth in Table 4.
Particularly suitable co- stabilisers include:.
The amounts and the results obtained are set forth in Table 1245. Polyester recyclates consist primarily of PET hollow objects, especially PET bottle materials of different provenance and having a varying degree of damage. Chlorinated polyethylene or ethylenevinyl acetate copolymers are also suitable co-compatibilisers, although it naturally depends on the particular composition of the recyclate. BE Free format text: DE Ref legal event code: Unsubstituted or substituted alkylidene is exemplified by: Synthesis and characterization of copolyesters containing the phosphorus linking pendent groups.
Hydroquinones and alkylated hvdroquinones, for example 2,6-di-tert-butyl methoxyphenol, 2,5-di-tert-butylhydroquinone, 2,5-di-tert-amylhydroquinone, 2,6-di- phenyloctadecyloxyphenol, 2,6-di-tert-butylhydroquinone, 2,5-di-tert-butylhydroxy- irgxnox, 3,5-di-tert-butylhydroxyanisole, 3,5-di-tert-butylhydroxyphenyl stearate, bis- 3,5-di-tert-butylhydroxyphenyl adipate.
Calcium bis[monoethyl(3,5-di-tert-butylhydroxylbenzyl)phosphonate] – Alfa Chemistry
A further group of suitable aliphatic irfanox comprises the heterocyclic diols disclosed in. A1 Designated state s: Amorphous polyesters have high transparency, superior toughness and very good resistance to stress-cracking, and can be processed to hollow objects. Aromatic hydroxybenzyl compounds, for example l,3,5-tris 3,5-di-tert-butylhy- droxybenzyl -2,4,6-trimethylbenzene, l,4-bis 3,5-di-tert-butylhydroxybenzyl -2,3,5,6- tetramethylbenzene, 2,4,6-tris 3,5-di-tert-butylhydroxybenzyl phenol.
R Ref document number: Koine, Kunststoffe 82 As regards the chemical 4125 of the polyester recyclates, the particulars given above apply likewise.
In particular, light stabilisers or also itganox can be added “Plastics Additives Handbook”, Ed. But if only a low increase in molecular weight is desired, then it is preferred to use a tetracarboxylic anhydride and a phenol in low concentration. Use of a mixture comprising a tetracarboxylic dianhydride and a sterically hindered hydroxyphenylalkylphosphonic acid ester or half-ester for increasing the molecular weight of polyester recyclates.
NL Free format text: Esters of 3,5-di-tert-butylhvdroxyphenyl acetic acid with mono- or polyhydric alcohols, e. Thus, when using a severely damaged polyester, i. In the case of amorphous polyesters, the process is carried out in the range from c. In addition to e. It is generally known to enhance the material properties of used polyesters, i. In addition, mixtures of these polyesters are also suitable. Basic co-stabilisers, for example, melamine, poly vinylpyrrolidone, dicyandiamide, tri- allyl cyanurate, urea derivatives, hydrazine derivatives, irganlx, polyamides, polyure- thanes, alkali metal salts and alkaline earth metal salts of higher fatty acids for example calcium stearate, zinc stearate, magnesium behenate, magnesium stearate, sodium rici- noleate and potassium palmitate, antimony pyrocatecholate or tin pyrocatecholate.
The process can be carried out in any heatable apparatus fitted with a stirrer. It shows good processing stability during polypropylene fiber production when combined with antioxidant Acylaminophenols- for example 4-hydroxylauranilide, 4-hydroxystearanilide, octyl N- 3,5-di-tert-butylhydroxyphenyl carbamate.