EP4139385A1 - Verwendung von anorganischen sulfiten und/oder thiosulfaten zur stabilisierung von aliphatischen polyestern, stabilisierte formmasse und hieraus hergestellte formmassen und formteile - Google Patents
Verwendung von anorganischen sulfiten und/oder thiosulfaten zur stabilisierung von aliphatischen polyestern, stabilisierte formmasse und hieraus hergestellte formmassen und formteileInfo
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- EP4139385A1 EP4139385A1 EP21720422.1A EP21720422A EP4139385A1 EP 4139385 A1 EP4139385 A1 EP 4139385A1 EP 21720422 A EP21720422 A EP 21720422A EP 4139385 A1 EP4139385 A1 EP 4139385A1
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/01—Use of inorganic substances as compounding ingredients characterized by their specific function
- C08K3/014—Stabilisers against oxidation, heat, light or ozone
Definitions
- inorganic sulfites and / or thiosulfates for stabilizing aliphatic polyesters, stabilized molding compounds and molding compounds and molded parts produced therefrom.
- the present invention relates to the use of inorganic sulfites and / or thiosulfates for stabilizing aliphatic polyesters, a stabilized molding compound and from this manufactured molded parts, a process for stabilizing aliphatic polyesters and possible uses of the molding compound.
- Condensation polymers such as polyester such as PET and polyamides such as PA6 are important plastics for packaging and technical applications, which are often intended for long-term use.
- polyester-based polymers made from renewable raw materials such as PLA (polylactide) or PBS (polybutylene succinate) are seen as possible substitutes for oil-based plastics, especially in the packaging industry and for agricultural applications.
- PLA polylactide
- PBS polybutylene succinate
- these applications for example in the form of foils, tend to have a short-term useful life.
- condensation polymers do not experience any (pre-) damage during processing, ie during the manufacture of parts or during compounding, in order not to prematurely lose properties such as mechanical properties to suffer.
- additives such as stabilizers and / or antioxidants are often added to the polymers.
- polyesters on the basis of renewable raw materials have so far been carried out by the usual phenolic antioxidants and / or phosphites such as in Meng, Xin; Shi, Guotao; Wu, Chushi; Chen, Weijie; Xin, Zhong; Shi, Yaoqi; Sheng, Yan (2016): Chain extension and oxidation stabilization of triphenyl phosphite (TPP) in PLA, Polymer Degradation and Stability 124, pp. 112– 118, in Georgousopoulou, Sicilna ⁇ Nektaria; Vouyiouka, Stamatina; Dole, Patrice; Papaspyrides, Constantine D.
- TPP triphenyl phosphite
- EP 0 313 113, US 3,542,725, US 2003/0104954) and for polyvinylpyrrolidone (US 2,872,433, DE 10 2005 005 974), but have so far been proposed not described for the thermal stabilization of aliphatic polyesters during the processing or manufacture of molded parts.
- Organic esters of sulphurous acid are generally known for the stabilization of polymers (e.g. DD 247 913, US 3,542,725).
- sulfur-containing catalysts in the +6 oxidation state for the production of polylactic acid (PLA) via solid phase condensation JP 2011-201946
- various classes of stabilizers which can also contain sulfur compounds in different oxidation states.
- the object of the present invention was therefore to develop stabilizers, in particular for stabilizing the processing of aliphatic polyesters, which are effective, inexpensive, environmentally friendly and based on readily available raw materials. This object could be achieved with the stabilizers according to the invention with inorganic sulfites as stabilizing agents.
- the invention thus relates to the use of at least one stabilizer selected from the group consisting of inorganic sulfites and / or thiosulfates for stabilizing aliphatic polyesters, in particular against oxidative, thermal and / or actinic degradation.
- at least one stabilizer selected from the group consisting of inorganic sulfites and / or thiosulfates for stabilizing aliphatic polyesters, in particular against oxidative, thermal and / or actinic degradation.
- PHA Polylactic acid
- a preferred embodiment provides that the thermal stabilization takes place during the thermal processing of the aliphatic polyester, in particular by adding, adding or incorporating the at least one stabilizer to or into the aliphatic polyester.
- An exemplary thermal processing of the aliphatic polyesters can, for example, be processing in the thermoplastic state, in which the aliphatic polyester is usually melted, preferably by mixers, kneaders or extruders.
- Preferred processing machines are extruders such as single-screw extruders, twin-screw extruders, planetary roller extruders, ring extruders, co-kneaders, which are preferably equipped with vacuum degassing. Processing can take place under air or, if necessary, under inert gas conditions. The addition or incorporation of the at least one stabilizer can take place during processing.
- thermoplastic state it is also possible to mix the at least one stabilizer with the aliphatic polyester, which can be present, for example, as chips, powder, beads or granules, before thermal processing, and then to process the mixture in the thermoplastic state.
- Thermal processing is preferably carried out under aprotic conditions, ie in the substantial absence of substances that easily release protons, such as acids or water.
- aprotic conditions are characterized in that the aliphatic polyester has a maximum water content of up to 0.5% by weight, preferably up to 0.05% by weight.
- the inorganic salts can be sulfites, disulfites or hydrogen sulfites.
- Preferred salts of sulphurous acid are salts of mono, di, trivalent or tetravalent metals, preferred are alkali metals, alkaline earth metals and zinc, such as sodium sulphite, potassium sulphite, lithium sulphite, calcium sulphite, magnesium sulphite, aluminum sulphite or zinc sulphite.
- Exemplary disulfites are potassium disulfite or sodium disulfite.
- An exemplary thiosulfate is, for example, sodium thiosulfate.
- the forms of the salts listed which are free of water of crystallization are very particularly preferred.
- Salts that are free of water of crystallization are those that lose a maximum of 10% by weight of water of crystallization under the respective processing conditions. This also includes, in particular, salts that can be converted into this state using conventional drying methods. Furthermore, the sulfites, disulfites or thiosulfates used must be selected in such a way that there is sufficient thermal stability at the processing temperatures of the respective polymers. Corresponding decomposition temperatures are known to the person skilled in the art or can be determined, for example, by thermogravimetric analysis (TGA).
- TGA thermogravimetric analysis
- the at least one stabilizer is preferably used in a weight ratio of from 0.01 to 10.00% by weight, preferably from 0.02 to 5.00% by weight, particularly preferably from 0.05 to 2.00 % By weight used.
- Aliphatic polyesters are condensation polymers made from aliphatic diols and aliphatic dicarboxylic acids or from aliphatic hydroxycarboxylic acids.
- Suitable diols for aliphatic polyesters are, for example, ethylene glycol, 1,3-propanediol, 1,2-propanediol, 1,4-butanediol, neopentyl glycol, 1,5-pentanediol, 1,6-hexanediol, 2,5-hexanediol, 3-methyl -2,4-pentanediol, 2-methyl-2,4-pentanediol, 2,2,4-trimethyl-1,3-pentanediol, 1,8-octanediol, 1,10-decanediol, 1,12-dodecanediol, - 2-ethylhexanediol-1,3, 2,2-diethylpropanediol-1,3, 2,2-bis- (4-hydroxycyclohexyl) -propane, 2,2-bis- (4-hydroxypropoxyphenyl)
- Suitable dicarboxylic acids are, for example, malonic acid, dimethylmalonic acid, succinic acid, glutaric acid, adipic acid, pimelic acid, suberic acid, Azelaic acid, sebacic acid, dodecanedioic acid, brassylic acid, tetradecanedioic acid, hexadecanedioic acid, cyclohexane-1,3-dicarboxylic acid or cyclohexane-1,4-dicarboxylic acid as well as mixtures and combinations thereof.
- aromatic structures can also be present to a lesser extent up to 20 mol%, preferably less than 10 mol%, very particularly preferably less than 1 mol%.
- Suitable aromatic structures for diols are hydroquinone, resorcinol, 2,6-naphthalenediol, 1,8-naphthalenediol, bsphenol-A, for dicarboxylic acids terephthalic acid, isophthalic acid, naphthalene-2,6-dicarboxylic acid.
- Suitable hydroxycarboxylic acids are, for example, lactic acid, glycolic acid, 4 -Hydroxybutyric acid, 3-hydroxybutyric acid or 3-hydroxyvaleric acid, a hydroxycarboxylic acid with aromatic components is mandelic acid.
- Suitable lactones are selected from the group consisting of monomeric or dimeric intramolecular esters of the aforementioned hydroxycarboxylic acids and mixtures and combinations thereof.
- Polyesters made from aliphatic dicarboxylic acids and diols or from hydroxycarboxylic acids are, in particular, polylactic acid (PLA), polybutylene succinate, polybutylene succinate-co-adipate, poly (butylene adipate) (PBA), polycaprolactone (PCL), poly-3-hydroxybutyrate -4-hydroxybutyrate, poly-3-hydroxyvalerate, poly (hexamethylene succinate), poly (butylene succinate) and copolymers and mixtures or blends of two or more of the aforementioned polymers;
- the particularly preferred polylactic acid (PLA) can be produced from L-lactide or D-lactide or a mixture L / D, usually by ring-opening polymerization of the lactide (dimer of lactic acid).
- PLA can also be in the form of a copolymer.
- Hydroxycarboxylic acids such as glycolic acid, 4-hydroxybutyric acid, 3-hydroxybutyric acid or 3-hydroxyvaleric acid are preferably used as comonomers in PLA copolymers.
- copolymers of PLA obtained from a diol such as ethylene glycol or butanediol and a dicarboxylic acid such as adipic acid, succinic acid or sebacic acid are also possible.
- Copolymers can They are available in the form of statistical (“random”), block or “tapered” structures or as stereoblock copolymers.
- the aliphatic polyesters can contain additives of other thermoplastic polymers to a minor extent.
- the present invention relates to a polymer composition containing or consisting of A) at least one stabilizer selected from the group consisting of inorganic sulfites and / or thiosulfates, and B) at least one aliphatic polyester.
- A) at least one stabilizer selected from the group consisting of inorganic sulfites and / or thiosulfates and B) at least one aliphatic polyester.
- the polymer composition according to the invention can additionally contain at least one additive. It is advantageous if the composition (A) is 0.01 to 10.00% by weight, preferably 0.05 to 5.00% by weight, particularly preferably 0.10 to 1.00% by weight.
- At least one stabilizer (B) 85.00 to 99.98% by weight, preferably 96 to 99.90% by weight of an aliphatic polyester, and (C) 0.01 to 5.00% by weight , preferably 0.05 to 1.00% by weight contains or consists of at least one additive.
- additives are selected from the group consisting of primary antioxidants, secondary antioxidants with the exception of phosphites or phosphonites, UV absorbers, light stabilizers, metal deactivators, filler deactivators, antiozonants, nucleating agents, antinucleating agents, impact strength improvers, lubricants - Energy modifiers, thixotropic agents, chain extenders, processing aids, mold release agents, flame retardants, pigments, dyes, optical brighteners, antimicrobial agents, antistatic agents, slip agents, Anti-blocking agents, coupling agents, cross-linking agents, anti-cross-linking agents, hydrophilizing agents, water-repellent agents, hydrolysis stabilizers, adhesion promoters, dispersants, compatibilizers, oxygen scavengers, acid scavengers, blowing agents, degradation additives, defoaming agents, anti-odor agents, anti-odor agents.
- Plasticizers, fibers such as glass fibers and / or carbon fibers and fillers are not included in the additives.
- these substances in their total can contain up to 80 parts by weight, preferably 0.1 to 60 parts by weight, particularly preferably 1 to 50 Parts by weight based on 100 parts by weight of the polymer composition described above (i.e. the sum of components (A) to (C)).
- the compositions contain in particular further classes of nucleating agents, additives for increasing molecular weight (chain extenders) or fillers.
- Preferred nucleating agents are talc, alkali or alkaline earth salts of monofunctional and polyfunctional carboxylic acids such as B.
- benzoic acid succinic acid, adipic acid, e.g. sodium benzoate, zinc glycerolate, aluminum hydroxy ⁇ bis (4 ⁇ tert ⁇ butyl) benzoate, 2,2 ⁇ ⁇ methylene ⁇ bis (4,6 ⁇ di ⁇ tert ⁇ butyl ⁇ phenyl ) phosphate, as well as trisamides and diamides such as trimesic acid tricyclohexylamide, trimesic acid tri (4-methylcyclohexylamide), trimesic acid tri (tert.butylamide), N, N ⁇ , N ⁇ ⁇ -1,3,5-benzene triyltris (2,2 ⁇ dimethyl Propanamide) or 2,6-naphthalenedicarboxylic acid dicyclohexylamide or orotic acid.
- trisamides and diamides such as trimesic acid tricyclohexylamide, trimesic acid tri (4-methylcyclohe
- Preferred additives for increasing molecular weight are diepoxides, bis ⁇ oxazolines, bis ⁇ oxazolones, bis ⁇ oxazines, diisocyanates, dianhydrides, bis ⁇ acyllactams, bis ⁇ maleimides, dicyanates, carbodiimides.
- Other suitable chain extenders are polymeric compounds such as polystyrene-polyacrylate-polyglycidyl (meth) acrylate copolymers, polystyrene-maleic anhydride copolymers and polyethylene-maleic anhydride copolymers.
- Preferred fillers and / or reinforcing materials are calcium carbonate, silicon cate, talc, mica, kaolin, metal oxides and metal hydroxides, soot, graphite, wood flour or fibers from natural products such as cellulose, glass fibers, carbon fibers, polyaramid fibers and other synthetic polymer fibers.
- Further suitable fillers are hydrotalcites or zeolites or sheet silicates such as montmorillonite, bentonite, beidelite, mica, hectorite, saponite, vermiculite, ledikite, magadite, illite, kaolinite, wollastonite, attapulgite.
- Suitable primary antioxidants (A) are phenolic antioxidants, amines and lactones.
- Suitable phenolic antioxidants are, for example: Alkylated monophenols, such as 2,6-di-tert-butyl-4-methylphenol, 2-tert-butyl-4,6-dimethylphenol, 2,6-di-tert-butyl-4-ethylphenol , 2,6-di-tert-butyl-4-n-butylphenol, 2,6-di-tert-butyl-4-isobutylphenol, 2,6-dicyclopentyl-4-methyl-phenol, 2- ( ⁇ -methylcyclohexyl) 4,6-dimethylphenol, 2,6-dioctadecyl-4-methylphenol, 2,4,6-tricyclohexylphenol, 2,6-di-tert-butyl-4-methoxymethylphenol, linear or branchediphenol, 2,6-di-tert-butyl-4-meth
- Particularly preferred phenolic antioxidants are the following structures: Other particularly preferred phenolic antioxidants are based on renewable raw materials such as B. tocopherols (vitamin E), tocotrienols, tocomonoenols, carotenoids, hydroxytyrosol, flavonols such as chrysin, quercitin, hesperidin, neohesperidin, naringin, morin, kaempferol, fisetin, anthocyanins such as delphinidin and malvidin, curcumin, carnosolic acid and resveratrol.
- vitamin E vitamin E
- tocotrienols tocomonoenols
- carotenoids hydroxytyrosol
- flavonols such as chrysin, quercitin, hesperidin, neohesperidin, naringin, morin, kaempferol, fisetin, antho
- Suitable aminic antioxidants are, for example: N, N'-di-isopropyl-p-phenylenediamine, N, N'-di-sec-butyl-p-phenylenediamine, N, N'-bis (1,4-dimethylpentyl) -p- phenylenediamine, N, N'-bis (1-ethyl-3-methyl-pentyl) -p-phenylenediamine, N, N'-bis (1-methylheptyl) -p-phenylenediamine, N, N'-dicyclohexyl-p-phenylenediamine , N, N'-diphenyl-p-phenylenediamine, N, N'-bis (2-naphthyl) -p-phenylenediamine, N-isopropyl-N'-phenyl-p-phenylenediamine, N- (1,3-dimethylbutyl) -N
- Preferred aminic antioxidants are: N, N'-di-isopropyl-p-phenylenediamine, N, N'-di-sec-butyl-p-phenylenediamine, N, N'-bis (1,4-dimethylpentyl) -p -Phenylenediamine, N, N'-bis (1-ethyl-3-methylpentyl) -p-phenylenediamine, N, N'-bis (1-methylheptyl) -p-phenylenediamine, N, N'-dicyclohexyl-p- phenylenediamine, N, N'-diphenyl-p-phenylenediamine, N, N'-bis (2-naphthyl) -p-phenylenediamine, N-isopropyl-N'-phenyl-p-phenylenediamine, N- (1,3 -Dimethylbutyl) -N'-
- distearyl thiodipropionate distearyl thiodipropionate, dilauryl thiodipropionate; ditridecyl dithiopropionate, ditetradecyl thiodipropionate, 3 ⁇ (dodecylthio) -, 1,1 '- [2,2 ⁇ bis [[3 ⁇ (dodecylthio) ⁇ 1 ⁇ ox] -1,3-propanediyl] propanoic acid ester.
- Suitable light stabilizers are, for example, compounds based on 2- (2 ⁇ -hydroxyp henyl) benzotriazoles, 2 ⁇ hydroxybenzophenones, esters of benzoic acids, acrylates, oxamides and 2 ⁇ (2 ⁇ hydroxyphenyl) ⁇ 1,3,5 ⁇ triazines.
- Suitable 2- (2'-hydroxyphenyl) benzotriazoles are, for example, 2- (2'-hydroxy-5'-methylphenyl) benzotriazole, 2- (3 ', 5'-di-tert-butyl-2'-hydroxyphenyl) -benzotriazole , 2 ⁇ (5'-tert-butyl-2'-hydroxyphenyl) benzotriazole, 2- (2'-hydroxy- 5 '- (1,1,3,3-tetramethylbutyl) phenyl) benzotriazole, 2 ⁇ (3', 5'-di-tert-butyl-2'-hydroxyphenyl) -5-chlorobenzotriazole, 2 ⁇ (3 '-Tert-butyl-2'-hydroxy-5'-methylphenyl-5-chlorobenzotriazole, 2- (3'-sec-butyl-5'-tert-butyl-2'-hydroxyphenyl) benzotriazole, 2 - (2'-Hydroxy-4'-oc
- Suitable 2-hydroxybenzophenones are, for example, 4-hydroxy-, 4-methoxy-, 4-octyloxy-, 4-decyloxy-4-dodecyloxy, 4-benzyloxy, 4,2 ', 4'-trihydroxy- and 2'-Hydroxy-4,4'-dimethoxy-derivatives of 2-hydroxybenzophenones.
- Suitable acrylates are, for example, ethyl ⁇ -cyano- ⁇ , ⁇ -diphenyl acrylate, isooctyl- ⁇ -cyano- ⁇ , ⁇ -diphenyl acrylate, methyl- ⁇ -carbomethoxycinnamate, methyl- ⁇ -cyano- ⁇ -methyl-p-methoxycinnamate, Butyl- ⁇ -cyano- ⁇ -methyl-p-methoxycinnamate, methyl- ⁇ -carbomethoxy-p-methoxycinnamate and N- ( ⁇ -carbo-methoxy- ⁇ -cyanovinyl) -2-methylindoline.
- Suitable esters of benzoic acids are, for example, 4 ⁇ tert ⁇ butylphenyl salicylate, phenyl salicylate, octylphenyl salicylate, dibenzoyl resorcinol, bis (4 ⁇ tert ⁇ butylbenzoyl) resorcinol, benzoyl resorcinol, 2,4 ⁇ di ⁇ tert ⁇ butylphenyl ⁇ 3,5 ⁇ di ⁇ tert ⁇ butyl-4-hydroxybenzoate, hexadecyl-3,5-di-tert-butyl-4-hydroxybenzoate, octadecyl-3,5-di-tert-butyl-4-hydroxybenzoate, 2-methyl-4,6-di- tert-butylphenyl 3,5-di-tert-butyl-4-hydroxybenzoate.
- Suitable oxamides are, for example, 4,4'-dioctyloxyoxanilide, 2,2'-diethoxy-oxanilide, 2,2'-dioctyloxy-5,5'-di-tert-butoxanilide, 2,2'-didodecyloxy-5,5'- di-tert-butoxanilide, 2-ethoxy-2'-ethyloxanilide, N, N'-bis (3-dimethylaminopropyl) oxamide, 2-ethoxy-5-tert-butyl-2'-ethoxanilide and its mixtures with 2 ⁇ Ethoxy-2'-ethyl-5,4'-di-tert-butoxanilide, mixtures of o- and p-methoxy-disubstituted oxanilides and mixtures of o- and p-ethoxy-disubstituted oxanilides.
- Suitable 2 ⁇ (2 ⁇ hydroxyphenyl) ⁇ 1,3,5 ⁇ triazines are, for example, 2,4,6 ⁇ tris (2 ⁇ hydroxy ⁇ 4 ⁇ octyloxyphenyl) ⁇ 1,3,5 ⁇ triazine, 2 ⁇ (2 ⁇ hydroxy ⁇ 4 ⁇ octyloxyphenyl) ⁇ 4,6 ⁇ bis (2,4 ⁇ dimethylphenyl) ⁇ 1,3,5 ⁇ triazine, 2 ⁇ (2,4 ⁇ dihydroxyphenyl) ⁇ 4,6 ⁇ bis (2,4 ⁇ dimethylphenyl) -1,3,5-triazine, 2,4-bis (2-hydroxy-4-propyloxyphenyl) -6- (2,4-dimethylphenyl) -1,3,5-triazine, 2- (2-hydroxy -4-octyloxyphenyl) -4,6-bis (4-methyl-phenyl-1,3,5-triazine, 2- (2-hydroxy-4-dodecy
- Suitable metal deactivators are, for example, N, N'-diphenyloxamide, N-salicylal-N'-salicyloylhydrazine, N, N'-bis (salicyloyl) hydrazine, N, N'-bis (3,5-di-tert-butyl-4- hydroxyphenylpropionyl) hydrazine, 3 ⁇ salicyloylamino ⁇ 1,2,4 ⁇ triazole, bis (benzylidene) oxalyl dihydrazide, oxanilide, isophthaloyl dihydrazide, sebacoyl bis ⁇ phenylhydrazide, N, N'-diacetyladipoyldihydrazide, N, N'-bis (salicyloyl) oxylyl dihydrazide, N, N'-bis (salicyloyl) thiopropionyl dihydrazide
- Suitable hindered amines are, for example, 1,1-bis (2,2,6,6-tetramethyl-4-piperidyl) succinate, bis (1,2,2,6,6-pentamethyl-4-piperidyl) sebacate, bis (1 -Octyloxy-2,2,6,6-tetramethyl-4-piperidyl) sebazate, bis (1,2,2,6,6-pentamethyl-4-piperidyl) -n-butyl-3,5-di- tert-butyl-4-hydroxybenzylmalonate, the condensation product of 1- (2-hydroxyethyl) -2,2,6,6-tetramethyl-4-hydroxypiperidine and succinic acid, linear or cyclic condensation products of N, N'-bis (2 , 2,6,6-tetramethyl-4-piperidyl) hexamethylenediamine and 4-tert-octyla-mino-2,6-dichloro-1,3,5-triazine, tris (2,
- n is in each case 3 to 100.
- Suitable dispersants are, for example: polyacrylates, e.g. copolymers with long-chain side groups, polyacrylate block copolymers, alkylamides: e.g. N, N'-1,2-ethanediylbisoctadecanamide, sorbitan esters, e.g. monostearyl sorbitan esters, titanates and zirconates, reactive copolymers with functional groups e.g.
- polypropylene-co-acrylic acid polypropylene-co-maleic anhydride, polyethylene-co-glycidyl methacrylate, polystyrene-old-maleic anhydride-polysiloxanes: e.g. dimethylsilanediol-ethylene oxide copolymer, polyphenylsiloxane Copolymers, amphiphilic copolymers: e.g. polyethylene ⁇ block ⁇ polyethylene oxide, dendrimers, e.g. dendrimers containing hydroxyl groups.
- Suitable anti-nucleating agents are azine dyes such as nigrosine.
- Suitable flame retardants are in particular inorganic flame retardants such as Al (OH) 3 , Mg (OH) 2 , AIO (OH), MgCO 3 , sheet silicates such as montmorillonite or sepiolite, not modified or organically modified, double salts such as Mg ⁇ Al Silicates, POSS (Polyhedral Oligomeric Silsesquioxane) compounds, huntite, hydromagnesite or halloysite.
- suitable pigments can be inorganic or organic in nature.
- Inorganic pigments are, for example, titanium dioxide, zinc oxide, zinc sulfide, iron oxide, ultramarine, carbon black, organic pigments are, for example, anthracnones, anthanthrones, benzimidazolones, quinacridones, diketopyrrolopyrroles, dioxazines, indanthrones, isoindolinones, azo compounds, perylenes, phthalates locyanine or pyranthrones.
- Other suitable pigments are effect pigments based on metal or pearlescent pigments based on metal oxide.
- Suitable optical brighteners are, for example, bisbenzoxazoles, phenylcoumarins or bis (styryl) biphenyls and in particular optical brighteners of the formulas:
- Suitable filler deactivators are, for example, polysiloxanes, polyacrylates, in particular block copolymers such as polymethacrylic acid-polyalkylene oxide or polyglycidyl (meth) acrylates and their copolymers, e.g. with styrene, and epoxides e.g.
- Suitable antistatic agents are, for example, ethoxylated alkylamines, fatty acid esters, alkyl sulfonates and polymers such as polyether amides.
- Suitable antiozonants are the above-mentioned amines such as N, N'-di ⁇ isopropyl-p-phenylenediamine, N, N'-di-sec-butyl-p-phenylenediamine, N, N'-bis (1,4-dimethylpentyl) -P-phenylenediamine, N, N'-dicyclohexyl-p-phenylenedia- min, N-isopropyl-N'-phenyl-p-phenylenediamine, N- (1,3-dimethylbutyl) -N'-phenyl-p-phenylen-diamine, N- (1-methylheptyl) -N'-phenyl -P-phenylenediamine
- the above-described additive composition and, if applicable, the additional additives are incorporated into the aliphatic polyester using customary processing methods, the polymer being melted and mixed with the additive composition according to the invention and any other additives, preferably using a mixer, kneader or extruder.
- Preferred processing machines are extruders such as single-screw extruders, twin-screw extruders, planetary roller extruders, ring extruders, co-kneaders, which are preferably equipped with vacuum degassing. Processing can take place under air or, if necessary, under inert gas conditions.
- the additive compositions according to the invention can be produced and introduced in the form of so-called masterbatches or concentrates, which contain, for example, 10-90% of the compositions according to the invention in a polymer.
- the present invention also relates to a molding compound or a molded part that can be produced or produced from the condensation polymer composition according to the invention, in particular in the form of foils (films), in particular agricultural foils such as mulch, tunnel or perforated foils, tapes ders, hollow bodies and foams, injection molded parts, fibers, profiles and other extrudates, parts from additive or generative manufacturing processes, such as fused layer modeling (FLM), layer laminate modeling (LLM), selective laser sintering (SLS) and other 3D Printing processes, packaging for food or cosmetic products, encapsulation of active ingredients and biologically active substances, bandages, surgical sutures and / or hygiene products, in particular as part of disposable diapers, sanitary towels and tampons.
- FLM fused layer modeling
- LLM layer laminate modeling
- the present invention also relates to a method for oxidative, thermal and / or actinic stabilization of an aliphatic polyester, in particular against oxidative, thermal and / or actinic degradation by adding, adding or incorporating at least one stabilizer selected from the group consisting of inorganic sulfites and thiosulfates to or in the aliphatic polyester.
- stabilizer reference is made to the statements above, which also apply in full to the method according to the invention.
- the thermal stabilization preferably takes place during the thermal processing of the aliphatic polyester, the thermal processing taking place in particular under aprotic conditions.
- the invention also relates to the use of a polymer composition according to the invention - for the production of packaging, in particular packaging for food or cosmetic products; - In the pharmaceutical industry, in particular for the encapsulation of active ingredients and biologically active substances; - in medical technology, in particular for the production of bandages and surgical sutures; - in hygiene products, especially as part of disposable diapers, sanitary towels and tampons; and / or - in agricultural applications, e.g. for the production of agricultural films such as mulch, tunnel or perforated films.
- packaging in particular packaging for food or cosmetic products
- - In the pharmaceutical industry, in particular for the encapsulation of active ingredients and biologically active substances
- - in medical technology in particular for the production of bandages and surgical sutures
- - in hygiene products especially as part of disposable diapers, sanitary towels and tampons
- agricultural films such as mulch, tunnel or perforated films.
- the polymers were dried in a vacuum drying cabinet at 80 ° C. for at least 16 h.
- the examples according to the invention and the comparative examples were produced by extrusion with a co-rotating twin screw extruder Process 11 from Thermo Fisher Scientific, with a screw diameter of 11 mm and a length to diameter ratio (L / D) of 40.
- the additives were mixed with the Matrix polymer mixed manually in a plastic bag and dosed volumetrically.
- the degradation of the polymer during processing is reduced and the molecular weight is reduced of the polymer is retained.
- the effectiveness of the stabilizer compositions according to the invention were tested in a polylactide (PLA, Luminy L175, supplier: Total Corbion) together with the additives specified in Table 2 at 210 ° C in a twin-screw microextruder (Micro 5cc, manufacturer DSM) in continuous mode at 200 revolutions per minute for 30 minutes in the melt in a circle.
- the force absorption is measured after 10, 20 and 30 minutes.
- the force is a Measure of the toughness of the melt and thus of the molecular weight of the polymer. The higher the remaining force, the lower the degradation of the polymer.
- the average value from 2 tests is given in each case.
- AO-1 Irganox 1010 (BASF SE)
- AO-2 Irganox 1330 (BASF SE)
- TS-1 Distearylthiodipropionate
- HAS-1 Sabostab 119 (Sabo SpA)
- HA-1 Irgastab FS 042 (BASF SE)
- HA-2 Genox EP (SI Group, Inc.)
- inorganic sulfites alone leads to greater molecular weight retention and thus to stabilization of the aliphatic polyester (Examples 2 to 6 according to the invention).
- the increased retention of force and thus the stabilizing effect can also be demonstrated in combination with commercially available stabilizers (Examples 7 to 16 according to the invention).
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102020205101.1A DE102020205101A1 (de) | 2020-04-22 | 2020-04-22 | Verwendung von anorganischen Sulfiten und/oder Thiosulfaten zur Stabilisierung von thermoplastischen Kondensationspolymeren, stabilisierte Formmasse und hieraus hergestellte Formmassen und Formteile |
| PCT/EP2021/059982 WO2021213940A1 (de) | 2020-04-22 | 2021-04-16 | Verwendung von anorganischen sulfiten und/oder thiosulfaten zur stabilisierung von aliphatischen polyestern, stabilisierte formmasse und hieraus hergestellte formmassen und formteile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4139385A1 true EP4139385A1 (de) | 2023-03-01 |
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ID=75625555
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP21720422.1A Pending EP4139385A1 (de) | 2020-04-22 | 2021-04-16 | Verwendung von anorganischen sulfiten und/oder thiosulfaten zur stabilisierung von aliphatischen polyestern, stabilisierte formmasse und hieraus hergestellte formmassen und formteile |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP4139385A1 (de) |
| DE (1) | DE102020205101A1 (de) |
| WO (1) | WO2021213940A1 (de) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102021202103A1 (de) * | 2021-03-04 | 2022-09-08 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung eingetragener Verein | Verwendung einer Stabilisatorzusammensetzung zur Stabilisierung von halogenfreien thermoplastischen Kunststoff-Recyclaten, eine Stabilisatorzusammensetzung, ein Masterbatch oder Konzentrat, eine stabilisierte Kunststoffzusammensetzung, hier ein Verfahren zur Stabilisierung von halogenfreien thermoplastischen Kunststoff-Recyclaten sowie Verwendung von Zusammensetzungen |
| DE102021202102A1 (de) * | 2021-03-04 | 2022-09-08 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung eingetragener Verein | Verwendung einer Stabilisatorzusammensetzung zur Stabilisierung von organischen Materialien, Stabilisatorzusammensetzung, Masterbatch, Zusammensetzung, Formmasse der Formteile, Verfahren zur oxidativen, thermischen aktinischen Stabilisierung eines thermoplastischen Kunststoffs sowie Verwendung einer Zusammensetzung |
| DE102022206466A1 (de) | 2022-06-27 | 2023-12-28 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung eingetragener Verein | Verwendung einer Stabilisatorzusammensetzung zur Stabilisierung von halogenfreier thermoplastischer Kunststoff-Neuware, Stabilisatorzusammensetzung, ein Masterbatch oder Konzentrat, eine stabilisierte Kunststoffzusammensetzung, Verfahren zur Stabilisierung von halogenfreien thermoplastischen Kunststoff-Neuware sowie Verwendung der Zusammensetzung |
Family Cites Families (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1270805B (de) | 1955-12-27 | 1968-06-20 | Gen Aniline & Film Corp | Stabilisieren von polymeren N-Vinyl-2-pyrrolidonen |
| US3542725A (en) | 1968-06-03 | 1970-11-24 | Stauffer Chemical Co | Plastic compositions containing sulfite and thiol stabilizers |
| US4268429A (en) | 1975-07-18 | 1981-05-19 | General Electric Company | Novel flame retardant polycarbonate compositions |
| US4028297A (en) | 1975-07-18 | 1977-06-07 | General Electric Company | Novel flame retardant polycarbonate compositions |
| JPS5497651A (en) | 1978-01-18 | 1979-08-01 | Toray Ind Inc | Flame retardant polyester resin composition |
| US4408005A (en) | 1982-03-22 | 1983-10-04 | The Dow Chemical Company | Flame retardant polycarbonates |
| DD247913A1 (de) | 1986-04-09 | 1987-07-22 | Univ Dresden Tech | Verfahren zur stabilisierung von polymeren |
| NL8701369A (nl) | 1987-06-12 | 1989-01-02 | Gen Electric | Polymeermengsel met een aromatisch polycarbonaat en een aromatische polyester. |
| DE3735863A1 (de) | 1987-10-23 | 1989-05-03 | Metallgesellschaft Ag | 3-basisches bleidimethylolpropionat und dieses enthaltende stabilisatorzusammensetzung fuer halogenhaltige vinylpolymerisate |
| US5941037A (en) | 1997-11-21 | 1999-08-24 | W. R. Grace & Co.-Conn | Oxygen scavenging hydrotalcite and compositions containing same |
| US6387461B1 (en) | 1999-05-06 | 2002-05-14 | Cryovac, Inc. | Oxygen scavenger compositions |
| US6773631B2 (en) | 2001-05-18 | 2004-08-10 | Hammond Group, Inc. | Liquid overbased mixed metal stabilizer composition of calcium, barium and zinc for stabilizing halogen-containing polymers |
| DE102005005974A1 (de) | 2005-02-09 | 2006-08-10 | Basf Ag | Verfahren zur Stabilisierung von Polyvinylpyrrolidonen |
| TWI344646B (en) * | 2006-09-08 | 2011-07-01 | Benq Materials Corp | Optical disc |
| US20110144246A1 (en) | 2008-07-02 | 2011-06-16 | Basf Se | Blends of stabilizers for aliphatic polyesters |
| JP5477100B2 (ja) | 2010-03-24 | 2014-04-23 | 東レ株式会社 | 脂肪族ポリエステル樹脂の製造方法および組成物 |
| ES2655539T3 (es) * | 2010-09-28 | 2018-02-20 | Natureworks Llc | Proceso para la producción de resina de tipo poli(ácido láctico) y prepolímero de tipo poli(ácido láctico) |
| AR104739A1 (es) | 2015-05-27 | 2017-08-09 | Anheuser-Busch Inbev S A | Polímeros para captación de oxígeno |
| CN107987498A (zh) * | 2017-12-25 | 2018-05-04 | 会通新材料股份有限公司 | 一种注塑级可降解的聚乳酸木塑微发泡复合材料及其制备方法 |
| CN108752882A (zh) * | 2018-05-09 | 2018-11-06 | 鄂俊鸣 | 一种保温隔热的3d打印材料及其制备方法 |
| CN109294188A (zh) * | 2018-09-17 | 2019-02-01 | 佛山朝鸿新材料科技有限公司 | 一种高韧性复合材料 |
-
2020
- 2020-04-22 DE DE102020205101.1A patent/DE102020205101A1/de active Pending
-
2021
- 2021-04-16 EP EP21720422.1A patent/EP4139385A1/de active Pending
- 2021-04-16 WO PCT/EP2021/059982 patent/WO2021213940A1/de not_active Ceased
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| Publication number | Publication date |
|---|---|
| WO2021213940A1 (de) | 2021-10-28 |
| DE102020205101A1 (de) | 2021-10-28 |
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