Ciba-geigy Corporation

Gerd Abeler

Wolfgang Wehner

Rudolf Maul

Rainer Schneider

Hermann O Wirth

Hans-Helmut Friedrich

Kornelia Malzacher

Hans J Sander

Reiner Fuchs

There is disclosed a process for the preparation of a powdered stabilizer mixture comprising tin stabilizers and adsorbents, which process comprises mixing and heating at least one carboxylic acid or a carboxylic anhydride, at least one organotin oxide and at least one, preferably mineral, adsorbent.

Process for the preparation of a stabiliser for halogen-containing

Composition containing a) a polymer containing chlorine and b) at least one compound of the formula I ##STR1## in which R.sub.1 is C.sub.1 -C.sub.10 alkyl, C.sub.2 -C.sub.10 hydroxyalkyl, phenyl, hydroxyphenyl, C.sub.7 -C.sub.10 phenylalkyl or C.sub.7 -C.sub.10 phenylalkyl which is substituted on the phenyl ring by an OH group, and R.sub.2 is C.sub.2 -C.sub.10 hydroxyalkyl, hydroxyphenyl or C.sub.7 -C.sub.10 phenylalkyl which is substituted on the phenyl ring by an OH group, subject to the condition that R.sub.2 is other than hydroxyphenyl if R.sub.1 is phenyl or hydroxyphenyl, and/or at least one compound of the formula I in which the OH groups present in the radicals R.sub.1 and R.sub.2 have been replaced by C.sub.2 -C.sub.12 alkanoyloxy. The compounds of the formula IA ##STR2## in which R is C.sub.1 -C.sub.10 alkyl, C.sub.2 -C.sub.10 hydroxyalkyl, phenyl, hydroxyphenyl, C.sub.7 -C.sub.10 phenylalkyl or C.sub.7 -C.sub.10 phenylalkyl which is substituted on the phenyl ring by an OH group, are novel.

Propane-1,3-dione derivatives and their use as stabilizers for polymers

A composition containing a) a chlorine-containing polymer, b) at least one Me(II) carboxylate and/or Me(II) phenolate, wherein Me(II) represents Ba, Ca, Mg, Sr or Zn, and c) at least one compound of formula I ##STR1## wherein n is 1, 2, 3, 4 or 6 and, when n is 1, X is C.sub.1 -C.sub.20 alkyl, C.sub.3 -C.sub.20 -alkenyl, C.sub.5 -C.sub.12 cycloalkyl, C.sub.5 -C.sub.12 cycloalkyl substituted by C.sub.1 -C.sub.4 alkyl, phenyl, C.sub.7 -C.sub.9 phenylalkyl, phenyl substituted by from 1 to 3 radicals or C.sub.7 -C.sub.9 phenylalkyl substituted on the phenyl ring by from 1 to 3 radicals, the radicals being selected from the group consisting of C.sub.1 -C.sub.4 alkyl, chlorine, hydroxy, methoxy and ethoxy; when n is 2, X is C.sub.2 -C.sub.12 alkylene, C.sub.2 -C.sub.12 alkylene substituted by phenyl, or C.sub.2 -C.sub.12 alkylene interrupted by oxygen or sulfur atoms; when n is 3, X is, for example, C.sub.3 -C.sub.7 alkanetriyl; when n is 4, X is, for example, C.sub.4 .varies.C.sub.10 alkanetetrayl, and when n is 6, X is a group of formula IV ##STR2## Some of the compounds of formula I are novel.

Mercaptobenzoates as stabilizers for chlorine-containing polymers

Compounds of the formula I ##STR1## in which R is C.sub.8 -C.sub.14 alkyl, phenyl, C.sub.7 -C.sub.9 aralkyl or R'OOC-CH.sub.2 --CH.sub.2, R' is C.sub.2 -C.sub.18 alkyl, C.sub.5 -C.sub.12 cycloalkyl, phenyl, C.sub.7 -C.sub.30 alkaryl or C.sub.7 -C.sub.18 -aralkyl and R' is C.sub.1 -C.sub.14 alkyl, phenyl or C.sub.7 -C.sub.9 aralkyl and x is 1 or 2, are heat stabilizers for chlorine-containing thermoplastics, in particular for PVC.

Organotin alkoxycarbonylphenyl mercaptides and the use thereof

The invention relates to compositions comprising 20-80% of a vinyl chloride homopolymer (PVC) and 80-20% of at least one copolymer selected from the group consisting of polystyrene/polyethylene/butylene, acrylate/rubber, acrylate/rubber/styrene, acrylonitrile/styrene/acrylate, ABS, NBR, NAR, SAN, EVA and modified EVA, which compositions are stabilized with at least one tin compound of formula

PVC resin blend compositions stabilized with lauryltin compounds

The invention relates to thermoplastic moulding compositions based on polymers of vinyl chloride and containing 0.1 to 5% by weight of a 2-thio-6-aminouracil of the formula I ##STR1## wherein each of R.sup.1 and R.sup.2 independently is a hydrocarbon radical of 1 to 24 carbon atoms which can be substituted by --OH, --COOR.sup.4, --O(C.dbd.O)R.sup.4, --(C.dbd.O)R.sup.4, halogen or amino, and R.sup.3 is hydrogen, acyl of 2 to 24 carbon atoms or --(C.dbd.O)NHR.sup.4, while R.sup.4 is a hydrocarbon radical of 1 to 24 carbon atoms.

Chlorinated thermoplastics stabilized with aminothiouracils

Stabilization of chlorine-containing thermoplasts with 1,4-dihydro-2,6-dimethylpyridine-3,5-dicarboxylic acid esters alone or, in particular, together with a metal-containing stabilizer as synergist.

1,4-Dihydro-2,6 dimethylyridine-3,5-dicarboxylic acid ester compositions

Chlorine-containing thermoplastics, especially polyvinyl chloride, can be stabilized against thermal degradation by incorporating therein synergistic mixtures consisting of (a) a mercaptan of the formula R(CH.sub.2 SH).sub.2, wherein n is 2 to 4 and R represents a n-valent aromatic radical, and (b) an epoxidized plasticizer.

Heat-stabilized chlorine-containing thermoplastic

Compounds of the formula (I) ##STR1## in which the radicals R independently of one another are hydrogen or C.sub.1 -C.sub.4 alkyl and Y.sub.1 and Y.sub.2 are both identical and are C.sub.1 -C.sub.20 alkyl, C.sub.2 -C.sub.20 alkenyl, C.sub.5 -C.sub.8 cycloalkyl, C.sub.6 -C.sub.10 cycloalkylalkyl, C.sub.6 -C.sub.14 aryl, which is unsubstituted or substituted by C.sub.1 -C.sub.8 alkyl, or C.sub.7 -C.sub.20 aralkyl or --(CH.sub.2).sub.m --COO (C.sub.1-4 alkyl), or if Y.sub.1 is --(CH.sub.2).sub.m --COO--(C.sub.1-4 alkyl), Y.sub.2 can also be the group --(CH.sub.2).sub.m --COO(C.sub.5-20 alkyl), and in which m is a number from 1 to 6 and n is 1 or 2. The compounds are heat stabilizers for halogen-containing thermoplastics.

Organo-tin compounds, process for their preparation and their use

1,4-Dihydro-2,6-dimethylpyridene-3,5-dicarboxylic esters

Mono- or bistetrazoles of the formula I ##STR1## wherein n is 1 or 2, R.sup.1 represents hydrogen or a monovalent hydrocarbon radical and R represents a monovalent or divalent hydrocarbon radical which can be interrupted by oxygen, NY, sulfur, SO.sub.2 and/or CO.sub.2 or substituted by OH or SH, and wherein Y represents hydrogen or a monovalent hydrocarbon radical. These compounds, especially when used in combination with epoxy plasticizers and/or metal salt stabilizers, are outstanding heat stabilizers for chlorine-containing thermoplastics, especially for PVC. Particular interest attaches to the combinations of tetrazoles with epoxy plasticizers, for example epoxidized soya bean oil, which constitute a metal-free stabilizer system.

Stabilized moulding material

Thermoplastic moulding materials for the production of packaging materials for foodstuffs which consist of, or are based on, vinyl chloride polymers and contain monoalkyl-tin-stabilizers.

Growing community of inventors

Darmstadt, Germany

Gerd Abeler