Patent ID: 6143814
Filing Date: 2000-11-07
Classification: C08K

Abstract:
A fusible stabilizer combination for thermoplastic polymers, obtainable by means of the following process steps:1. Melting of at least one metal carboxylate (2) of a metal selected from the group consisting of magnesium, zinc, or a mixture thereof, and a higher carboxylic acid, which can be unsaturated,whereby the metal carboxylate (2) is produced, or produced in situ by heating and stirring the corresponding carboxylic acid above its melting point and that of the metal carboxylate formed, subsequent addition of the metal compound, in an amount at most stoichiometric to the amount of carboxylic acid, wherein the metal compound is selected from the group consisting of metal oxide, metal hydroxide, metal carbonate, and/or basic metal carbonate, andwherein at least one metal carboxylate (2) is produced in situ;2. optional addition of at least one further metal carboxylate (2) made from a metal selected from the group consisting of lithium, sodium, potassium, magnesium, calcium, barium, aluminum, titanium, zirconium, iron, zinc, tin, or a mixture of the above, and from a carboxylic acid that can also be unsaturated, whereby the metal carboxylate (2) is added or produced in situ by heating with stirring the corresponding carboxylic acid above its melting point and that of the metal carboxylate to be produced and subsequent addition of a metal compound in an amount at most stoichiometric to the amount of carboxylic acid added, the metal compound being selected from the group consisting of metal oxide, metal hydroxide, metal carbonate, and/or basic metal carbonate;3. addition of at least one antioxidation substance (3) with stirring of the melt;4. addition of at least one further metal compound (4) selected from the group consisting of metal hydroxides, metal oxides, basic metal salts, synthetic and/or natural minerals such as hydrotalcite, hydrocalumite, garnets, katoite, hydrogrossulates or ettringits, of the general formula MeO.sub.a (OH).sub.b A.sub.c *x H.sub.2 O, whereinMe is an up to quadra-valent cation selected from the group consisting of Li, Na, K, Mg, Ca, Zr, Sn, Si, Ti, Al, Fe, as well as Zn, or a mixture thereof, wherein Ti, Sn and/or Zr, in this mixture, may have alkyl substituents with 1-12 C-atoms; A represents an anion, selected from the group consisting of sulfate, sulfite, sulfide, thiosulfate, peroxide, peroxosulfate, hydrogen phosphate, hydrogen phosphite, carbonate, halogenide, nitrate, nitrite, hydrogen sulfate, hydrogen carbonate, hydrogen sulfite, hydrogen sulfide, dihydrogen phosphate, dihydrogen phosphite, monocarboxylic acids such as acetate and benzoate, amide, azide, hydroxide, hydroxyl amide, hydrazide, acetyl acetonate, phenolate, pseudohalogenide, halogenite, halogenate, perhalogenate, I.sub.3.sup.-, permanganate, dianions of dicarboxylic acids such as phthalate, oxalate, maleate, and fumarate, bisphenolate, phosphate, pyrophosphate, phosphite, pyrophosphite, trianions of tricarboxylic acid such as citrate, trisphenolate, and/or mixtures thereof;a+b does not equal 0;c is selected so that an electro-neutral molecule is formed; and5. forming and cooling the melt.