Sandoz Gmbh

Clariant Finance (bvi) Limited

Sandoz Ltd., (sandoz Ag)

Clariant International Ltd

Lajos Avar

Kurt Hofer

Martin Preiswerk

Evelyne Kalt

Joseph R Webster

Gilbert Ligner

Hellmuth Reinshagen

Ernst Gronmaier

Rainer Wolf

Klaus H Stoll

Peter Staniek

Karl Bechtold

Christoph Kröhnke

Andreas Thuermer

Hans-Werner Finck

Roland Joseph Valin

Ren&eacute; B&auml;r

Christoph Kroehnke

Victor Sanahuja

Christoph Krōhnke

Helmut Bohnke

Wolf D Habicher

Uwe Hahner

Christoph KRÖHNKE

The invention relates to combinations of benzylidene-bis-malonate based lightsstabilizers with specific other additives showing synergistic efficiency during long term light exposure of organic substrates.

Stabilizer composition for improved protection against degradation of organic substrates by light

A stabilizer mixture for one or more compounds of the general formula (1) and (1A) but preferably (1), wherein the groups R independently stand for an alkyl-, cycloalkyl-, aralkyl- or aryl-rest whereas the aromatic ring system may be optionally substituted by one or more groups R' which may be identical or different and which groups R&#x2032; can be an aryl-, a saturated or unsaturated alkyl-, aralkyl- or cycloalkyl-group as well as halogen, an amino-, aminoalkyl-, aminocycloalkyl-, cyano-, thiocyano- or nitrogroup.and a UV-absorber, hindered amine stabilizer, sterically hindered phenol, organophosphite, organophosphonite, organophosphine, or mixtures thereof. The present invention is useful in the protection of various polymeric substrates against the damaging influence of light exposure by the long term storage of polymers. This effect can be observed especially in so-called engineering plastics (such as, for example, PC, PET, PBT, ABS, TPU).

Stabilizer mixtures for the protection of polymer substrates

A stabilizer mixture for one or more compounds of the general formula (1) and (1A) but preferably (1), wherein the groups R independently stand for an alkyl-, cycloalkyl-, aralkyl- or aryl-rest whereas the aromatic ring system may be optionally substituted by one or more groups R' which may be identical or different and which groups R&#x2032; can be an aryl-, a saturated or unsaturated alkyl-, aralkyl- or cycloalkyl-group as well as halogen, an amino-, aminoalkyl-, aminocycloalkyl-, cyano-, thiocyano- or nitrogroup. The present invention is useful in the protection of various polymeric substrates against the damaging influence of light exposure by the long term storage of polymers. This effect can be observed especially in so-called engineering plastics (such as, for example, PC, PET, PBT, ABS, TPU).

Benzophenones and the use thereof as photoinitiators

The invention relates to the use of piperidine compounds of the formula I

Method of stabilizing EPDM modified polypropylene by adding piperidine compounds

The subject matter of the invention is the use of certain piperidine compounds of formula I ##STR1## optionally in combination with an oxalanide UV absorber for the stabilization of pigmented or unpigmented polyolefins against the negative consequences of UV radiation. The invention also relates to compositions comprising a piperidine compound of formula I, a polyolefin, and an oxalanide UV absorber and compositions comprising a compound of formula I and a second HALS compound.

Stabilized polyolefins

Organic compounds

A compound of formula I for use in stabilizing polymeric material against effects such as light and heat ##STR1## in which R is hydrogen; oxygen; --OH; C.sub.1-24 alkyl; --O--CO--C.sub.1-24 alkyl; --O--CO--C.sub.1-24 alkyl; --O--CO-phenyl or --COR.sub.5 ; where R.sub.5 is --C(R.sub.3).dbd.CH.sub.2, C.sub.1-6 alkyl, phenyl, CO--C.sub.1-24 alkyl, --CO--phenyl, --NR.sub.7 R.sub.8, --CH.sub.2 --C.sub.6 H.sub.5, --CO--OC.sub.1-12 alkyl or --COOH; where R.sub.3 is hydrogen or C.sub.1-4 alkyl; R.sub.7 is hydrogen, C.sub.1-12 alkyl, C.sub.5-6 cycloalkyl, phenyl, phenyl-C.sub.1-4 alkyl or C.sub.1-12 alkylphenyl and R.sub.8 is C.sub.1-12 alkyl or hydrogen, each R.sub.1, independently, is --CH.sub.3 or --CH.sub.2 (C.sub.1-4 alkyl) or both groups R.sub.1 form a group --(CH.sub.2).sub.5 --; and each R.sub.2, independently, is --CH.sub.3 or --CH.sub.2 (C.sub.1-4 alkyl) or both groups R.sub.2 form a group --(CH.sub.2).sub.5 --. A is --O-- or --N(C.sub.1-4 alkyl)-- or --NH-- R.sub.9 is hydrogen or methyl, and R.sub.10 is an aromatic single ring or an aromatic fused 2 to 3 ring group or a heteroaromatic single ring or a a heteroaromatic fused 2 or 3 ring group.

Use of HALS compounds

Phosphonite-hals and phosphite-hals compounds as stabilizers

New powder coatings or powder coating compositions comprising A) a binder system B) specific powder coating additives C) at least one compound of formula I ##STR1## in which R.sub.1 is methyl, ethyl, n-propyl, iso-propyl, n-butyl, sec-butyl or tert-butyl and optionally D) additional compounds selected from the group consisting of antioxidants, UV-stabilizers, UV-absorbers, acid scavengers, radical scavengers, pigments, dyes, UV-quenchers, processing stabilizers, fillers, and tribocharging additives exibit advantages during their production. Compounds according to formula I can be used as UV-absorbers and can be incorporated even in greater amounts and dispersed homogeneously at the manufacture of the powder coating compositions in an extruder. It is a further advantage of these compounds that they do not volatilize during stoving of the coatings.

Powder coating compositions

Novel imino ether compounds, processes for their production and methods for their use are provided. These novel imino ether compounds are particularly useful as light stabilizers for polymeric compositions, particularly for lacquer coating compositions.

Imino ethers

Novel compounds according to formula I ##STR1## are disclosed, as well as processes for their production and methods for their use. These compounds are useful as light stabilizers for polymeric materials, particularly in acid catalyzed stoving finishes such as those encountered in the top coat of two layer metallic finishes.

2,2,6,6-tetraalkylpiperidine compounds useful as light stabilizers

##STR1## in which R is hydrogen, unsubstituted C.sub.1-18 alkyl, unsubstituted C.sub.1-21 alkyl carbonyl, unsubstituted C.sub.2-19 alkenyl carbonyl, phenyl carbonyl, phenyl C.sub.1-4 alkyl carbonyl, C.sub.1-4 alkyl phenyl carbonyl or oxygen;

Stabilizing polymers

A compound of formula I ##STR1## in which each R.sub.1, independently is selected from hydrogen, C.sub.1-12 alkyl, C.sub.1-12 alkoxy and halogen;

Oxalic acid di(phenylamides) and use thereof as UV absorbers

Compounds are provided which are useful as light stabilizers for polymeric materials and which have the formula ##STR1## wherein R.sub.1, R.sub.2 and R.sub.4 are organic radicals, R.sub.3 and R.sub.15 are hydrogen or organic radicals and R is hydrogen, oxygen or an organic radical.

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Biel-Benken, Switzerland

Lajos Avar