WO2012022457A1

WO2012022457A1 - Stabilizer combination for pvc

Info

Publication number: WO2012022457A1
Application number: PCT/EP2011/004075
Authority: WO
Inventors: Cagan Heris; Tarkan Uysal; Michael Schiller
Original assignee: Akdeniz Kimya Sanayi Ve Ticaret A.S.
Priority date: 2010-08-16
Filing date: 2011-08-12
Publication date: 2012-02-23
Also published as: DE102010034512A1

Abstract

Stabilizer composition for halogenated polymers comprising at least one antioxidant, at least one salt of a superacid and at least one (un)substituted N-cyanoacetylurea of the general formula NC-CH₂-CO-N(R¹)-CO-N(R²) in which the R¹ and R² radicals are each independently hydrogen, a branched or unbranched, linear or cyclic alkyl radical having 1 to 18 carbon atoms or an aryl radical which has 5 to 18 carbon atoms and may optionally be substituted by one or more alkyl radicals having 1 to 6 carbon atoms.

Description

Stabilizer combination for PVC

The invention relates to a composition for stabilizing halogen-containing polymers, in particular polyvinyl chloride (PVC).

Halogen-containing polymers or plastics or molded articles produced therefrom tend to undergo substantial changes during their production process and due to the effect of environmental influences. For example, these types of plastics may decompose or discolor under the influence of heat and / or light. To stabilize halogen-containing polymers, therefore, a very wide variety of substances or mixtures have already been used.

A halogen-containing polymer, e.g. Polyvinyl chloride (PVC), when melt-formed, transforms into a polyene structure, eliminating hydrochloric acid and discoloring the polymer. In order to improve the thermostability of the polymer, it is common to incorporate metal carboxylates as stabilizers in the resin. However, since incorporation of the stabilizers alone causes blackening of the polymer in a longer melt molding process, it is common practice to add a co-stabilizer. There are a variety of combinations of inorganic and organic compounds known as stabilizers for halogen-containing polymers.

The basis is formed in almost all cases by the calcium salt of an organic acid (e.g., technical stearic acid, lauric acid, 2-ethylhexanoic acid, octanoic acid or benzoic acid). The calcium salt causes a fundamental stabilization of the halogen-containing polymer by the binding of the liberated hydrochloric acid as calcium chloride. The calcium salt is occasionally mixed with a magnesium sulfate on o.g. Base combined or replaced by a magnesium salt.

However, the calcium or magnesium salt may be used in combination with zinc salts based on o.o. organic acids are used. If zinc soaps are not used, the salts of superacids such as, for example, perchloric acid or fluoroalkanesulfonic acids, which are optionally combined with other costabilizers, are often used. Typical other Costa bilisatoren are often selected in zinc-free combinations of the groups of hydrotalcites, zeolites, metal (hydr) oxides, polyols, epoxies, aminouracils, etc.

I Furthermore, as well as lead, tin and sulfur, zinc is considered to be unsustainable as an element in the literature (C. Azar, J. Holmberg, K. Lindgren, Socio-ecological indicators for sustainability, Ecological Economics 18 (1996) 89, KE Lunde , J. Leadbitter, Schiller, "Sustainability Assessment of Stable Systems for Use in PVC Pipes", PVC 5, Brighton, UK, 2005; Mark Everard; "PVC: Reaching for Sustainability" IOM3 and The Natural Step, 2008).

So far, it has not only been expected but also proven that the combination of antioxidants on the one hand and perchlorate salts, which are powerful oxidants, on the other hand, makes little sense. This shows e.g. EP 0677550B2 Tab. 1. The dehydrochlorination value (DHC, a measure of the static thermal stability) of Example 1 and 4 in the presence of epoxidized soybean oil (ESO) is 26 min. very low. Without ESO, this value would be even lower. Only by the addition of large amounts of other epoxides, the DHC can be significantly increased. Comparison Examples 7 and 8 in Tab. 2 confirm this finding.

DE 10216883 describes the combination of N-cyanoacetylureas, cationic layered lattice compounds and fluoroalkanesulfonic acid (salts). The combination Ν, Ν'-dimethylcyanoacetylurea and the sodium salt of fluoromethanesulfonic acid (Example 6 in Tab. 1) gives an extremely low Congo red value (measure of the static thermal stability) which increases only by the addition of 0.5 phr Alkamizer 2 (Example 4, ibid), but can not be doubled.

A similar tendency is found in DE 10216884, where Alcamizer 2 has been replaced by calcium hydroxide; see. Example 6 in Tab. 1 (without calcium hydroxide) with Example 4 (with calcium hydroxide).

In DE 10216886 this finding is confirmed again, wherein a polyol (THEIC) was used instead of Alcimizer 2.

DE10030464 describes the combination of N, N'-dimethylcyanoacetylurea, ureas and sodium perchlorate. The Congo Red of Example 2 (Ν, Ν'-dimethylcyanoacetylurea and sodium perchlorate) can be increased slightly by the addition of increasing amounts of urea (Examples 9 to 11). The object was to find a stabilizer combination that better than the prior art properties such as dynamic stability and / or a higher sustainability potential and / or better initial color and / or better color stability when storing PVC specimen at higher temperatures, eg , B. between 160 and 200 ° C.

This object has been achieved by the features of the composition according to claim 1.

It has surprisingly been found that such a PVC stabilizer composition of antioxidant, a salt of a superacid and N-cyanoacetylurea, its N- or Ν, Ν'-substituted compounds, has advantageous properties, in particular when using the composition for PVC- Applications such as Pipes, injection molded articles such as fittings, gutters, profiles, floor coverings or hoses. Surprisingly, it has been found that the stabilizer compositions according to the invention give PVC products and the parts and products made therefrom a very good initial color, an excellent color retention, a higher dynamic and static stability and a better sustainability potential.

In particular, the initial color and the color retention of the halogen-containing material can be significantly improved compared to other organic and inorganic costabilizers when used in applications that are used outdoors and exposed to the weather, for example in profiles. In addition, it has been found that by using the stabilizer compositions according to the invention moldings of halogen-containing polymers can be prepared without problem, which allow optimum performance in use and which are comparable with PVC stabilization commodities based on stabilizer compositions for PVC profiles. This stabilizing effect also occurs when the PVC contains further stabilizers, costabilizers or auxiliaries.

The present invention likewise relates to the use of the stabilizer composition according to the invention for stabilizing PVC Moldings, and the PVC moldings containing a stabilizer composition according to the invention.

The stabilizer composition according to the invention can be used for halogen-containing polymers. Examples of such halogen-containing polymers may be thermoplastic halogen-containing polymers, for example, but not limited to, polyvinyl chloride (PVC), polyvinylidene chloride, chlorinated or chlorosulfonated polyethylene, chlorinated polypropylene or chlorinated ethylene / vinyl acetate copolymer or similar compounds. Particularly advantageous are polymers of the PVC type, i. Vinyl chloride homopolymers and copolymers of vinyl chloride with other monomers.

The stabilizer compositions for halogen-containing polymers according to the present invention include:

- at least one antioxidant

- At least one salt of a superacid, preferably a salt of perchloric acid or Fluroalkylsulfonsäure

- At least one (un) substituted IM-cyanoacetyl-urea of the general formula NC-CH ₂ -CO-N (R ¹ ) -CO-N (R ² ), wherein the radicals R ¹ and R ² are each independently hydrogen, a branched or unbranched, linear or cyclic alkyl radical having 1 to 18 carbon atoms or an aryl radical having 5 to 18 carbon atoms, which may optionally be substituted by one or more alkyl radicals having 1 to 6 carbon atoms, mean.

The stabilizer composition according to the invention is free of metal salts of heavy metals such as e.g. Cadmium and lead. Preferably, the composition according to the invention also contains no zinc salts.

The amount of antioxidants is in the range of about 0.01 phr to about 5 phr in the drybiene and / or stabilizer composition. A range of 0.02 phr to 3 phr is particularly preferred. The most preferred range of antioxidants is about 0.05 phr to 1.5 phr.

The amount of salt of a superacid is about 0.005 phr to 2 phr in the drybiene and / or stabilizer composition. A range of 0.01 phr to 1.00 phr is particularly preferred. The most preferred range for the salt of a superacid is about 0.02 phr to 0.75 phr.

The amount of (un) substituted N-cyanoacetylurea is about 0.005 phr to 1.00 phr in the dryblend and / or stabilizer composition. A range of 0.01 phr to 0.75 phr is particularly preferred. The most preferred range of (un) substituted N-cyanoacetylurea is about 0.02 phr to 0.50 phr.

Examples of antioxidants include, but are not limited to, alkylphenols, hydroxyphenylpropionates, hydroxybenzyl compounds,

Alkylidenebisphenols, thiobisphenols and aminophenols, in particular e.g. 2,6-di-tert-butyl-4-methyl-phenol, 2,6-di-benzyl-4-methyl-phenol, stearyl-3- (3'-5'-di-tert-butyl-4 '-hydroxy-phenyl) propionate, 4,4'-thiobis- (3-methyl-6-tert-butyl-phenol), 4-nonylphenol, 2,2'-methylenebis (4-methyl-6-tert- butylphenol), 2,5-di-tert-butylhydroquinone, 4,4 ', 4 "- (1-methyl-1-propanyl-3-ylidenes) tris [2- (1,1-dimethylethyl) -5-methyl phenol, their neutral or basic lithium, magnesium, calcium and aluminum salts, as well as hindered amines and / or phosphonites and mixtures thereof. Preferred are phenolic antioxidants

The term "superacid" refers to acids that are stronger than concentrated sulfuric acid (pK _s = -3.9) All superacids have a pK _s value in the negative range Examples of the superacids are perchloric acid, fluoroalkanesulfonic acids or their salts ,

Exemplary perchlorates include, but are not limited to, UCIO ₄ , NaClO ₄ , Ca (CIO ₄ ) ₂ , Mg (CIO ₄ ) _2, or Al (CIO ₄ ) ₃ . Further exemplary compounds of this group are Alcamizer 5, Alcamizer 5-2 from Kyowa and triethanolamine-perchlorato (triflato) -metal-inner-complex according to EP 1910454.

For the purposes of the present invention, fluoroalkenesulfonic acids are understood as meaning organic sulfonic acids which have at least one fluorine atom per molecule. Preferably, the fluoroalkanesulfonic acids to be used according to the invention have one sulfonic acid group per molecule. Furthermore, those fluoroalkyl or Florocycloalkylsulfonsäuren are preferred, the 1 to 18 C-atoms per Contain molecule. Very particular preference is given to completely fluorinated alkylsulfonic acids (perfluoroalkylsulfonic acids) having 1 to 18 C atoms per molecule of the formula CF ₃ (CF ₂ ) n SO ₃ H where n = 0, 1, _2, _3, 4, 5, 6, May be 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 or 17. The fluoroalkylsulfonic acids can be used as such or in the form of their salts, with the alkali metal salts being preferred. Accordingly, the term "fluoroalkylsulfonic acids" in the context of the present application encompasses both the fluoroalkanesulfonic acids as such and their salts.

The stabilizer composition used according to the invention can be added individually to the polymer or to the polymer mixture. However, it is also possible to add the combination according to the invention together with other (co) stabilizers or the auxiliaries listed below to the polymer or a polymer mixture. For example, a dosage in the extruder, e.g. in the vacuum zone, also encompassed by the present invention.

The stabilizer composition of the present invention may further be treated with one or more additional additives such as primary stabilizers, co-stabilizers, zeolites, fillers, plasticizers, dyes, pigments, antistatics, surfactants, blowing agents, impact modifiers, UV stabilizers, lubricants, processing agents, or the like; be combined.

Co-stabilizers are compounds which provide a further stabilizing contribution to halogen-containing polymers when used in the stabilizer composition according to the present invention. Possible co-stabilizers may be selected from the group consisting of 1,3-diketone compounds, dihydropyridines, polyols, isocyanurates, metal salts, natural or synthetic minerals such as hydrotalcites, hydrocalumites, zeolites, amino acid derivatives, organic phosphorous acid esters, epoxy compounds, perchlorates and salts of Superacids exists to be selected.

Examples of 1,3-diketone compounds include, but are not limited to, dibenzoylmethane, stearoylbenzoylmethane, palmitoylbenzoylmethane,

Myristoylbenzoylmethane, lauroylbenzoylmethane, benzoylacetone, acetylacetone, tribenzoylmethane, diacetylacetobenzene, p-methoxystearoylacetophenone, Acetoacetic acid esters and acetylacetone and their metal salts, in particular those of lithium, sodium, potassium, calcium, magnesium, titanium and / or aluminum.

Co-stabilizers from the group of polyols include, but are not limited to, glycerol, pentaerythritol, di- and tripentaerythritol, trismethylolpropane (TMP), di-TMP, sorbitol, mannitol, malititol, saccharides, disaccharides (especially sucrose, 4-O β-D-galactopyranosyl-D-glucose, 4-O-alpha-D-glucopyranosyl-D-glucose, 6-O- (6-deoxy-alpha-L-mannopyranosyl) -D-glucose, alpha-D-

Glucopyranosyl-alpha-D-glucopyranoside, 6-O-alpha-D-glucopyranosyl-D-glucose, 4-O-beta-D-glucopyranosyl-D-glucose, 2-O-beta-D-glucopyranosyl-D-glucose, 6-O-alpha-D-glucopyranosyl-D-glucitol, 3-O-alpha-D-glucopyranosyl-D-fructose, 6-O-beta-D-glucopyranosyl-D-glucose, 4-O-beta-D- Galactopyranosyl-D-glucitol, 4-O-alpha-D-glucopyranosyl-D-glucitol, 6-O-alpha-D-galactopyranosyl-D-glucose, 3-O-alpha-D-galactopyranosyl-D-myo-inositol, 4-O-β-D-galactopyranosyl-D-fructose, 4-O-β-D-galactopyranosyl-β-D-glucopyranose, 6-O-alpha-D-glucopyranosyl-D-fructose, 4-O-β- D-galactopyranosyl-alpha-D-glucopyranose, 2-0- (6-deoxy-alpha-L-mannopyranosyl) -D-glucose, 4-O-alpha-D-glucopyranosyl-D-fructose, 2-O-ß- D-glucopyranosyl-alpha-D-glucopyranose, 1-O-alpha-D-glucopyranosyl-D-mannitol, 6- 0- (6-deoxy-alpha-L-mannopyranosyl) -β-D-glucopyranose, 2-O- β-D-glucopyranosyl-β-D-glucopyranose, 6-O-alpha-D-glucopyranosyl-alpha-D-glucopyranose, 2-O-alpha-D-glucopyranosyl-alpha-D-glucopyranose, 2-O-alpha D-Glucopyr anosyl-β-D-glucopyranose, 1-O-alpha-D-glucopyranosyl-D-fructose, 6-O-alpha-D-

Glucopyranosyl-alpha-D-fructofuranose, 6-O-alpha-D-glucopyranosyl-D-glucitol, 4-O-beta-D-galactopyranosyl-D-glucitol, 4-O-alpha-D-glucopyranosyl-D-glucitol, lO-alpha-D-glucopyranosyl-D-mannitol), trisaccharides, polysaccharides, in particular polyvinyl alcohols, starch, cellulose and their partial esters.

Examples of metal salt group co-stabilizers include, but are not limited to, hydroxides, oxides, carbonates, basic carbonates, and carboxylic acid salts of lithium, sodium, potassium, magnesium, calcium, zinc, aluminum, titanium, and the like. In one embodiment of the present invention, the metal salts may be salts of carboxylic acids, also referred to as metal soaps. Examples of suitable carboxylic acid anions include anions of mono- and divalent carboxylic acids such as acetic acid, propionic acid, butyric acid, valeric acid, hexanoic acid, enanthic acid, octanoic acid, neodecanoic acid, 2-ethylhexanoic, pelargonic, decanoic, undecanoic, dodecanoic, tridecanoic, myristic, palmitic, lauric, isostearic, stearic, 12-hydroxystearic, 9,10-dihydroxystearic, oleic, 3,6-dioxaheptanoic, 3,6,9-trioxadecanoic, Behenic acid, benzoic acid, p-tert-butylbenzoic acid, dimethylhydroxybenzoic acid, 3,5-di-tert-butyl-4-hydroxybenzoic acid, toluic acid, dimethylbenzoic acid, ethylbenzoic acid, n-propylbenzoic acid, salicylic acid, p-tert-octylsalicylic acid, sorbic acid, Anions of divalent carboxylic acids or their monoesters, such as oxalic acid, malonic acid, maleic acid, fumaric acid, adipic acid, tartaric acid, cinnamic acid, mandelic acid, malic acid, glycolic acid, salicylic acid, polyglycol dicarboxylic acids having a degree of polymerization of about 10 to about 12, phthalic acid, isophthalic acid, terephthalic acid or hydroxyphthalic acid, Anions of tri- or tetravalent carboxylic acids or

their mono-, di- or triesters such as those described in hemimellitic acid, trimellitic acid, pyromellitic acid or citric acid and also so-called overbased carboxylates, as described, for example, in DE 4,106,404 or DEA 4002988, the disclosure of the latter being incorporated herein by reference Textes is considered. As metal soaps, Ca and Mg metal soaps are particularly preferred.

Examples of natural and synthetic minerals include, but are not limited to, A3, A4, A5 zeolites, mordenite, erionite, faujasite X or Y zeolites, and ZSM-5 zeolites, hydrotalcites (from Alcamizer 1 and 4-type) and / or mixtures thereof.

Examples of co-stabilizers from the group of amino acid derivatives include, but are not limited to, glycine, alanine, lysine, tryptophan, acetylmethionine, pyrrolidonecarboxylic acid, α-aminocrotonic acid, α-aminoacrylic acid, α-aminoadipic acid, and the like, as well as the corresponding esters thereof. The alcohol components of these esters may include monohydric alcohols such as methyl alcohol, ethyl alcohol, propyl alcohol, i-propyl alcohol, butyl alcohol, ethylhexanol, octyl alcohol, i-octyl alcohol, lauryl alcohol, stearyl alcohol, and the like, as well as polyols such as ethylene glycol, propylene glycol, 1 , 3-butanediol, 1,4-butanediol, glycerol, diglycerol, trismethylolpropane, pentaerythritol, dipentaerythritol, erythritol, sorbitol, mannitol and the like. Examples of co-stabilizers from the group of phosphorous acid esters include, but are not limited to, triaryl phosphites, such as triphenyl phosphite, tris (p-nonylphenyl) phosphite; Alkylaryl phosphites, such as, for example, monoalkyl diphenyl phosphites, for example diphenyl isooctyl phosphite, diphenyl isodecyl phosphite; and dialkyl monophenyl phosphites such as phenyl diisooctyl phosphite, phenyl diisodecyl phosphite; and trialkyl phosphites such as triisooctyl phosphite, tristearyl phosphite and the like.

Examples of co-stabilizers from the group of epoxy compounds include, but are not limited to, various animal or vegetable oils, such as epoxysoar oil, epoxy rape oil, epoxidized carboxylic acid esters, such as epoxidized epoxy methyl oleate, epoxybutyl oleate, epoxidized alicyclic compounds, glycidyl ethers, such as Example bisphenol A diglycidyl ether, bisphenol F diglycidyl ether; Glycidic esters, such as glycidyl acrylate, glycidyl methacrylate, their polymers, copolymers; and epoxidized polymers such as epoxidized polybutadiene, epoxidized ABS, and the like.

Exemplary isocyanurates include, but are not limited to,

CH ₂ CKCH ₂

HOH ₂ CH ₂ H ₂ CH ₂ OH H ₂ CHCH ₂ C CH ₂ CHCH ₂

10

By way of example, chalk or coated chalk may also be named as fillers, the fillers being not restricted thereto.

Another component which may be added to the stabilizer composition of the invention is titanium dioxide. Titanium dioxide occurs essentially in nature in three modifications: anatase, brookite, and rutile.

A stabilizer composition according to the invention may further contain lubricants such as montan wax, fatty acid esters, purified or hydrogenated natural or synthetic triglycerides or partial esters, polyethylene waxes, amide waxes, chloroparaffins, glycerol esters or alkaline earth metal soaps. Useful lubricants are moreover also described in "Plastics Additives Handbook", H. Zweifel / RD Maier / M. Schiller, Carl Hanser Verlag, 6th edition, 2009, pp. 539-579. Also suitable as lubricants are, for example, fatty ketones as described in DE 4204887 and silicone-based lubricants, as mentioned for example in EP-A 0 259 783, or combinations thereof, as mentioned in EP-A 0 259 783. The documents cited are hereby expressly incorporated by reference

The disclosure relating to lubricants is considered part of the disclosure of the present text.

Preferably, the stabilizer composition according to the invention has at least the following component:

- at least one antioxidant

- At least one salt of a superacid

at least one (un) substituted N-cyanoacetyl-urea of the general formula NC-CHz-CO-NCR ^ -CO-IMCR ² ), wherein the radicals R ¹ and R ² are each independently hydrogen, a branched or unbranched, linear or cyclic alkyl radical having 1 to 18 carbon atoms or an aryl radical having 5 to 18 carbon atoms, which may optionally be substituted by one or more alkyl radicals having 1 to 6 carbon atoms, mean.

In order to process PVC with the stabilizer composition of the invention, the methods known in the art can be used. Examples of such methods include, but are not limited to, extruding, calendering, the plastisol process, and the like.

The present invention accordingly provides a remarkable and novel contribution to the development of the prior art, in particular for the processing and stabilization of PVC profiles and other halogen-containing thermoplastic polymers.

The invention is further illustrated by, but not limited to, the following examples.

In the following examples (Tab. 1 inventive examples, Tab. 2 Comparative Examples) are different compositions of PVC pipes and described technical profiles. For their production, in addition to S-PVC and chalk without surface treatment, the components mentioned in the examples were weighed. All components were in a hot mixer within 5 min. heated to 120 ° C, in 5 min. cooled to 40 ° C, then stored for 24 h and then 30 min. extruded on a single screw extruder from Brabender at three different speeds of the extruder screw. The individual compositions are given in the following Table 1 and Table 2.

Comparing Example E1 with E2, it can be seen that increasing the amount of perchlorate increases stability (dehydrochlorination, DHC). If the perchlorate is removed as in V4, the DHC decreases. If one compares example El with E3, one finds an increase of the DHCs with increasing dosage of the antioxidant. If, as in V3, no antioxidant is added, the DHC value drops. Examples E4 to E8 show that the usual Costa bilisatoren not adversely affect the combination of the invention. All inventive combinations of Examples El to E7 are clearly superior to Comparative Examples VI to V4 in stability.

Tab. 1 Examples according to the invention

El E2 E3 E4 E5 E6 E7 E8

100. 100. 100. 100. 100. 100. 100. 100.

S-PVC (k = 67) 00 00 00 00 00 00 00 00

Chalk 5.00 5.00 5.00 5.00 5.00 5.00 5.00 5.00

KOPE53 (oxidized PE_Wachs of the company.

Akdeniz Kimya) 0.10 0.10 0.10 0.10 0.10 0.10 0.10 0.10

Kronos 2220 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05

KPE20 (PE wax from Akdeniz

Kimya) 0.50 0.50 0.50 0.50 0.50 0.50 0.50 0.50

Calcium stearate 0.30 0.30 0.30 0.30 0.30 0.30 0.30 0.30

Magnesium Stearate 0.10 0.10 0.10 0.10 0.10 0.10 0.10 0.10

Irganox 1076 0.20 0.20 0.30 0.20 0.20 0.20 0.20 0.20

Sodium perchlorate (65% solution in

Water) 0.05 0.10 0.05 0.05 0.05 0.05 0.05 0.00

trifluoromethanesulfonic

Sodium salt 0.05

N, N'-dimethyl-N-cyanoacetate-urea 0.20 0.20 0.20 0.20 0.20 0.20 0.20 0.20

Pentaerythritol 0.50

Calcium hydroxide 0.50

Alcamizer 1 (Kyowa) 0.50

4A zeolite 0.50 0.50

Dehydrochlorination (min.) 50 59 55 67 74 71 63 52

Tab. 2 Comparative Examples

VI V2 V3 V4

S-PVC (k = 67) 100.00 100.00 100.00 100.00 Chalk 5.00 5.00 5.00 5.00

KOPE53 (oxidized PE_Wax from Akdeniz Kimya) 0.10 0.10 Kronos 2220 0.05 0.05

KPE20 (PE wax from Akdeniz Kimya) 0.50 0.50

Calcium stearate 0.30 0.30

Magnesium Stearate 0.10 0.10

Stearoylbenzoylmethane 0.10 0.10

Irganox 1076 0.20

Sodium perchlorate (65% solution in water) 0.05

N, N'-dimethyl-N-cyanoacetate-urea 0.20 0.20

Commercial Calcium Zinc Lubricant Stabilizer Onepack 2.30

Commercially available OBS lubricant stabilizer onepack 2.30

Dehydrochlorination (min.) 25 43 30 33

Claims

Claims:

A stabilizer composition for halogen-containing polymers comprising at least one antioxidant, at least one salt of a superacid, and at least one (un) substituted N-cyanoacetylurea of the general formula NC-Cr 1 -CO-NiR ² -CO-NiR ² ), wherein the radicals R ¹ and R ² are each independently hydrogen, a branched or unbranched, linear or cyclic alkyl radical having 1 to 18 carbon atoms or an aryl radical having 5 to 18 carbon atoms, optionally containing one or more alkyl radicals having 1 to 6 carbon atoms may be substituted.

2. A stabilizer composition for halogen-containing polymers according to claim 1 wherein the superacid is perchloric acid, Floroalkylsulfonsäure or per- Fluoroalkylsulfonsäure.

3. stabilizer composition for halogen-containing polymers according to claim 1 containing a metal soap.

4. stabilizer composition for halogen-containing polymers according to any one of the preceding claims additionally containing a polyol.

5. stabilizer composition for halogen-containing polymers according to any one of the preceding claims additionally containing a metal compound, preferably from the group of zeolites, hydrotalcites, metal oxides and metal hydroxides.

6. stabilizer composition for halogen-containing polymers according to any one of the preceding claims additionally containing an epoxy compound.

7. stabilizer composition for halogen-containing polymers according to any one of the preceding claims additionally containing an organic phosphite.

8. stabilizer composition for halogen-containing polymers according to any one of the preceding claims additionally containing a substance selected from the group of the amino acid, the salts of amino acids, the uracia, the melamines and hydroxy-containing amino compounds.

9. stabilizer composition for halogen-containing polymers according to any one of the preceding claims additionally containing a lubricant.

10. stabilizer composition for halogen-containing polymers according to any one of the preceding claims additionally containing a blowing agent.

11. A stabilizer composition for halogen-containing polymers according to any one of the preceding claims additionally containing a pigment.

12. The stabilizer composition for halogen-containing polymers according to any one of the preceding claims additionally containing a filler.

13. A stabilizer composition for halogen-containing polymers according to any one of the preceding claims additionally containing a plasticizer.

14. A stabilizer composition for halogen-containing polymers according to any one of the preceding claims as a melt product.

15. A PVC composition in the form of granules or as a 'dry blend' comprising a stabilizer composition according to any one of the preceding claims.

16 PVC molding containing a stabilizer composition for halogen-containing polymers according to any one of the preceding claims.