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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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- anisole, 3,5-di-tert-butylhydroxyanisole, 3,5-di-tert-butylhydroxyphenyl stearate, bis- 3,5-di-tert-butylhydroxyphenyl adipate.

Other preferred light stabilisers are aromatic phosphites or phosphonites.


Oxamides, for example 4,4′-dioctyloxyoxanilide, 2,2′-diethoxyoxanilide, 2,2′-dioc- tyloxy-5,5′-di-tert-butoxanilide, 2,2′-didodecyloxy-5,5′-di-tert-butoxanilide, 2-ethoxy-2′- ethyloxanilide, N,N’-bis 3-dimethylaminopropyl oxamide, 2-ethoxytert-butyl-2′-ethox- anilide and its mixture with 2-ethoxy-2′-ethyl-5,4′-di-tert-butoxanilide and mixtures of ortho- and para-methoxy-disubstituted oxanilides and mixtures of o- and p-ethoxy-disub- stituted oxanilides.

Their composition will depend essentially on the desired properties for a specific end use. Aromatic will be understood as meaning preferably aromatic hydrocarbon radicals such as phenylene or naphthylene. The process can be carried out in any heatable apparatus fitted with a stirrer.

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However, this method is troublesome and, moreover, is highly sensitive to the impurities that may be present in waste material. In case of R being an alkanetetrayl radical, the iranox dianhydride may be such as butane- 1 ,2,3,4-tetracarboxylic dianhydride.

R j is isopropyl, tert-butyl, cyclohexyl or cyclohexyl which is substituted by 1 to 3. GB Ref legal event code: Sterically hindered hydroxyphenylalkylphosphonic acid esters and half-esters are disclosed, inter alia, in US-Aand may be illustrated by the following formula: Hydroxybenzylated malonates, for example dioctadecyl-2,2-bis 3,5-di-tert-butyl 14255 malonate, bis[octadecyl 3-tert-butylhydroxymethylbenzyl ]malo- nate, bis[dodecylmercaptoethyl-2,2-bis- 3,5-di-tert-butylhydroxybenzyl ]malonate, bis- [4- 11 11425 phenyl]-2,2-bis 3,5-di-tert-butylhydroxybenzyl malonate.

Store it in a dry, cool, irgano shady place. Illustrative examples of cycloalkylidene are cyclopentylidene, cyclohexylidene, cycloheptylidene and cyclooctylidene. The present invention relates to a process for increasing the molecular weight of polyesters and to the polyesters obtainable by said process.


The PET bottle materials originating from different manufacturers comprise polyethylene terephthalate and also copolymers of different structure and composition, but with a preponderant content of PET structures. PET waste material from a bottle scrap collection ex CH together with 0.

In addition, mixtures of these polyesters are also suitable. 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.

Internet Crime Complaint Center irganx International Financial Scams This site is never involved in any transaction, and does not handle payments, shipping, guarantee transactions, provide escrow services, or offer irgnaox protection” or “seller certification”.

The procedure of Examples is repeated, but kneading the individual samples for 15 minutes. Esters of 3,5-di-tert-butylhvdroxyphenyl acetic acid with mono- or polyhydric alcohols, e.

The aliphatic dicarboxylic acids may contain from to 2 to 40 carbon atoms, the iranox dicarboxylic acids from 6 to 10 carbon iryanox, the aromatic dicarboxylic acids from 8 to 14 carbon atoms, the aliphatic hydrocarboxylic acids from 2 to 12 carbon atoms and the aromatic and cycloaliphatic hydroxycarboxylic acids from 7 to 14 carbon atoms.

Acylaminophenols- for example 4-hydroxylauranilide, 4-hydroxystearanilide, octyl N- 3,5-di-tert-butylhydroxyphenyl carbamate.

A further group of suitable aliphatic diols comprises the heterocyclic diols disclosed in German Offenlegungsschrift specifications 1, and Illustrative examples are: FR Free format text: Illustrative examples Of bisphenols are: Oligomeric chain extenders for processing, post-processing and recycling of condensation polymers, synthesis, compositions and applications. FR Ref legal event code: As regards the chemical composition of the polyester recyclates, the particulars given above apply likewise.

Polyesters with aromatic dicarboxylic acids have achieved the greatest importance, in particular the polyalkylene terephthalates. Suitable substituents of the phenyl or naphthyl radicals are typically groups. GB Free format text: It is particularly useful as a stabilizer and esterification catalyst in modified rosin resins and in PET and other thermoplastic polyesters. Partially crystalline polyesters are used for injection moulding compounds and have superior strength and rigidity, high dimensional stability and good wear properties.


R’ and R” in this formula may be alkyl of 125 to 6 carbon atoms, halogen such as chloro or bromo and, preferably, hydrogen atoms. Compounds in which R! Other suitable co-compatibilisers contain in particular polar groups, for example maleic anhydride-styrene copolymers or graft polymers containing acrylic acid groups.

DE Ref legal event code: Hvdroxylated thiodiphenyl ethers, for example 2,2′-thiobis 6-tert-butylmethyl- phenol2,2′-thiobis 4-octylphenol4,4′-thiobis 6-tert-butylmethylphenol4,4′-thio- bis 6-tert-butylmethylphenol4,4′-thiobis- 3,6-di-sec-amylphenol4,4′-bis- 2,6-dim- ethylhydroxyphenyl disulfide. Suitable aliphatic dicarboxylic acids are those containing 2 to 40 carbon atoms, typically suberonic acid, oxalic acid, malonic acid, dimethylmalonic jrganox, succinic acid, octadecylsuccinic acid, pimelic acid, adipic acid, trimethyladipic acid, sebacic acid, azelaic acid and dimer acids dimerisation products of unsaturated aliphatic carboxylic acids such as oleic acidalkylated malonic irganlx succinic acids such as octadecylsuccinic acid.

Particularly suitable co- stabilisers include:. Impact-modified thermoplastics resin molding compositions and articles molded therefrom. In particular, light stabilisers or also antioxidants can be added “Plastics Additives Handbook”, Ed.

The mechanical and physical properties depend essentially on the molecular weight of the polymer.

Synthesis and characterization of copolyesters containing the phosphorus linking pendent groups. A further group of suitable aliphatic diols comprises the heterocyclic diols disclosed in. Modified weatherable thermoplastic resin molding compositions and articles molded therefrom.

It is generally known to enhance the material properties of used polyesters, i. It is also effective for the stabilization of polyolefin particularly polypropylene fibercrosslinked elastomer and special adhesive, wax, oil etc. Lapsed in a contracting state announced via postgrant inform. Preferred compounds of formula II are those that contain at least one tert-butyl group as Rj or R 2. A further utility of PET is fibre production.