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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O- N- and S-benzyl compounds, for example 3,5,3′,5′-tetra-tert-butyl-4,4′-dihydroxy- dibenzyl ether, octadecylhydroxy-3,5-dimethylbenzylmercaptoacetate, tris 3,5-di-tert- butylhydroxybenzyl amine, bis 4-tert-butylhydroxy-2,6-dimethylbenzyl dithio- terephthalate, bis 3,5-di-tert-butylhydroxybenzyl sulfide, isooctyl-3,5di-tert-butyl hydroxybenzylmercaptoacetate.
Cubicle Liquidators have a real showroom with real displays and real in-stock inventories that we A PET or PBT recyclate, in particular a PET bottle recyclate, comprising a tetracarboxylic dianhydride and a sterically hindered hydroxyphenylalkylphosphonic acid ester or half-ester.
China Antioxidant – China Antioxidant (IRGANOX ), Antioxidant
Koine, Kunststoffe 82 The process can be carried out in any heatable apparatus fitted with a stirrer. Owing to reduced molecular weight, it is only possible to achieve a limited high-quality recycling of irrganox polyesters and production waste without carrying out an aftertreatment. After 10 minutes the polymer mixture is sufficiently fused to be stirrable.
For the addition, the tetracarboxylic dianhydride and the phenol can independently of each other be in the form of a powder, liquid, granulate or in compacted form, or also in some cases on a substrate such as silica gel or together with a polymer powder or wax such as a polyethylene wax. It is generally known to enhance the material properties of used polyesters, i. November 27.
Irganox 1425 CAS NO.65140-91-2
Suitable polyesters of hydroxycarboxylic acids typically include polycaprolactone, polypivalolactone or the polyesters of 4-hydroxycyclohexanecarboxylic acid or 4-hydroxybenzoic acid, 5-hydroxynaphthalene-l-carboxylic acid, 6-hydroxynaphtha- lenecarboxylic acid. Suitable aromatic dicarboxylic acids are: MM01 Ref document number: Stabilizer system of metal hydroxyalkyl phosphonic acid, uv absorber and benzoate.
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It is preferred to carry out the process in closed apparatus excluding atmospheric oxygen, conveniently in an inert gas atmosphere N 2. IT Free format text: Substituents defined as alkyl containing up to 20 carbon atoms iragnox suitably be methyl, ethyl, propyl, butyl, pentyl, hexyl irganx octyl, stearyl, as well as corresponding branched isomers. The mechanical and physical properties depend essentially on the molecular weight of the polymer.
Preferably n is 1 or 2 and, most preferably, 1. 125
The invention further relates to the use of a mixture comprising a tetracarboxylic dianhydride and a sterically hindered hydroxyphenylalkylphosphonic acid ester or half- ester for increasing the molecular weight of polyesters and, in particular of polyester recyclates.
Suitable aliphatic dicarboxylic acids are those containing 2 to 40 carbon atoms, typically suberonic acid, oxalic acid, malonic acid, dimethylmalonic acid, 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 and succinic acids such as octadecylsuccinic acid.
Polycarbonate and polyester blends modified with polyorganosiloxane graft polymers combined with diene rubber-based graft polymers. A process according to any one of claims 1 to 5, which comprises using 0. 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.
Very particularly preferred sterically hindered hydroxyphenylalkylphosphonic acid esters and half-esters are The process can be carried out in any heatable apparatus fitted with a stirrer. Preferred diols are the alkylene diols, 1,4-dihydroxycyclohexane and l,4-bis hydroxy- methyl cyclohexane. These recyclates may furthermore contain standard impurities such as dye residues, paint residues, metal traces, fuel residues or inorganic salts. UV absorbers and light stabilisers 2.
FR Free format text: Table 2 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. A process for increasing the molecular weight of polyesters, polyester copolymers or polyester blends, which comprises heating a polyester blended with a tetracarboxylic acid dianhydride and a sterically hindered hydroxyphenylalkylphosphonic acid ester or half-ester to above the melting point in the case of crystalline polyesters or to above the glass transition temperature in the case of amorphous polyesters of the polyester.
Sterically hindered hydroxyphenylalkylphosphonic acid esters and half-esters are disclosed, inter alia, in US-Aand may be illustrated by the following formula:.
Ca is particularly preferred.
Esters of substituted and unsubstituted benzoic acids, as for example 4-tertbutyl- phenyl salicylate, phenyl salicylate, octylphenyl salicylate, dibenzoyl resorcinol, bis 4- tert-butylbenzoyl resorcinol, benzoyl resorcinol, 2,4-di-tertbutylphenyl 3,5-di-tert-butyl- 4-hydroxybenzoate, hexadecyl 3,5-di-tert-butylhydroxybenzoate, octadecyl 3,5-di-tert- butylhydroxybenzoate, 2-methyl-4,6-di-tert-butylphenyl 3,5-di-tert-butylhydroxy- benzoate.
Particularly suitable co- stabilisers include:.