52829-07-9

Basic information

• Product Name: Bis(2,2,6,6-tetramethyl-4-piperidyl)sebacate
• Synonyms: Decanedioic acid bis(2,2,6,6-tetramethyl-4-piperidinyl)ester;DECANEDIOIC ACID BIS(2,2,6,6-TETRAMETHYL-4-PIPERIDYL) ESTER;BIS(2,2,6,6-TETRAMETHYL-4-PIPERIDINYL)SEBACATE;BIS(2,2,6,6-TETRAMETHYL-4-PIPERIDYL) SEBACATE;BTPS;TINUVIN 770;adkstabla77;bis(2,2,6,6-tetramethyl-4-piperidinyl)decanedioate
• CAS NO: 52829-07-9
• Molecular Formula: C₂₈H₅₂N₂O₄
• Molecular Weight: 480.73
• EINECS: 258-207-9
• Product Categories: Industrial/Fine Chemicals;Polymer Additives;Polymer Science;Stabilizers
• Mol File: 52829-07-9.mol
• Article Data: 21

Chemical Properties

• Melting Point: 82-85 °C(lit.)
• Boiling Point: 590.214 °C at 760 mmHg
• Flash Point: 421 °F
• Appearance: slightly yellowish crystalline granules
• Density: 1.01 g/cm³
• Vapor Pressure: 0mmHg at 25°C
• Solubility: acetone: 19 % (w/w) at 20 °C
• PKA: 10.49±0.10(Predicted)
• Water Solubility: 18.8mg/L at 23℃
• CAS DataBase Reference: Bis(2,2,6,6-tetramethyl-4-piperidyl)sebacate(CAS DataBase Reference)
• NIST Chemistry Reference: Bis(2,2,6,6-tetramethyl-4-piperidyl)sebacate(52829-07-9)
• EPA Substance Registry System: Bis(2,2,6,6-tetramethyl-4-piperidyl)sebacate(52829-07-9)

Safety Data

• Hazard Codes: T,N,Xi
• Statements: 23-37/38-41-51/53-36
• Safety Statements: 26-39-45-61
• RIDADR: UN 2811 6.1/PG 2
• WGK Germany: 2
• RTECS: HD8315000
• TSCA: Yes
• HazardClass: 6.1
• PackingGroup: II
• Hazardous Substances Data: 52829-07-9(Hazardous Substances Data)

Usage

Characterization

Light Stabilizer 770 is a low molecular weight hindered amine light stabilizer (HALS) for applications demanding particularly high light stability. It provides excellent light stability for thick sections but can also be used for articles with a high surface area such as films and tapes.

Applications

Different sources of media describe the Applications of 52829-07-9 differently. You can refer to the following data:
1. Light Stabilizer 770? is recommended to be used in polypropylene, impact modified PP (TPO), EPDM, polystyrene, impact polystyrene, ABS, SAN, ASA, polyurethanes, and is also effective in polyamides and polyacetals.
2. Light Stabilizer 770 is a low molecular weight hindered amine light stabilizer that provides excellent light stability for thick sections and films in the recommended substrates. Benefit of using Light Stabilizer 770 is the high light-stabilizing performance, particularly in PP thick sections to protect the surface. It has broad compatibility and can be easily dispersed. Compared to UV absorbers, the effectiveness of HALS, like Light Stabilizer 770, is not dependent on the polymer’s thickness. For this reason the use of Light Stabilizer 770 also provides good light stability in articles with higher specific surface, e. g. films and tapes.

Guidelines for use

The recommended concentrations range between 0.1 % and 1.0 %, depending on the substrate, processing conditions and application. The optimum level is substrate and application specific. Extensive performance data of Light Stabilizer 770 in various substrates and for various applications is available upon request.

Handling

In accordance with good industrial practice, handle with care and avoid unnecessary personal contact. Avoid continuous or repetitive breathing of dust. Use only with adequate ventilation. Avoid contact with eyes. Avoid release to the environment. Avoid dust formation and ignition sources.

Chemical Properties

White solid

Uses

T770 can be used as a hindered amine UV stabilizer in plastic materials. It can be used in the manufacturing and packaging of pharmaceutical products. Titanium oxide(TiO2)/T770 may be used in amine induced light stabilizers in the synthesis of recyclable water-based polyurethane with poly(oxytetramethylene)glycol (PTMG).

General Description

Bis(2,2,6,6-tetramethyl-4-piperidyl) (T770) sebacate is a low molecular weight ultra violet (UV) hindered amine light stabilizer (HALS) made up of nitroxyl radicals. It acts as a heat controller that can react with phenolic antioxidants incorporated in polymers.

Flammability and Explosibility

Notclassified

InChI:InChI=1/C28H52N2O4/c1-24(2)16-20(17-25(3,4)29-24)28(23(33)34,15-13-11-9-10-12-14-22(31)32)21-18-26(5,6)30-27(7,8)19-21/h20-21,29-30H,9-19H2,1-8H3,(H,31,32)(H,33,34)/p-2

Synthetic route

bis(1-oxyl-2,2,6,6-tetramethylpiperidin-4-yl)sebacate (2516-92-9) → bis-(2,2,6,6-tetramethyl-4-piperidinyl) sebacate (52829-07-9)

Conditions	Yield
With ethanethiol In benzene	17%

2C44H56O4*C28H52N2O4 (138847-20-8) → 5,11,17,23-tetra-t-butyl-25,26,27,28-tetrahydroxycalix-4-arene (157432-87-6, 288302-11-4, 288302-12-5) + bis-(2,2,6,6-tetramethyl-4-piperidinyl) sebacate (52829-07-9)

Conditions	Yield
In acetonitrile at 25℃; Equilibrium constant;

4-hydroxy-2,2,6,6-tetramethylpiperidine (2403-88-5) + dimethyl sebacate (106-79-6) → bis-(2,2,6,6-tetramethyl-4-piperidinyl) sebacate (52829-07-9)

Conditions	Yield
With 1-methyl-pyrrolidin-2-one
With 1-methyl-pyrrolidin-2-one
With sodium methylate In octane at 110 - 120℃; Large scale;

4-hydroxy-2,2,6,6-tetramethylpiperidine (2403-88-5) + 1,10-decanedioic acid (111-20-6) → bis-(2,2,6,6-tetramethyl-4-piperidinyl) sebacate (52829-07-9)

Conditions	Yield
With tetrabutoxytitanium at 220℃; under 760.051 Torr; for 10h; Temperature; Time; Inert atmosphere;

octane (111-65-9) + bis-(2,2,6,6-tetramethyl-4-piperidinyl) sebacate (52829-07-9) → bis(1-octyloxy-2,2,6,6-tetramethyl-4-piperidyl)sebacate

Conditions	Yield
Stage #1: octane; bis-(2,2,6,6-tetramethyl-4-piperidinyl) sebacate With molybdenum trioxide at 130℃; Large scale; Stage #2: With tert.-butylhydroperoxide at 90 - 130℃; for 10h; Temperature; Reagent/catalyst; Large scale;	96%
Stage #1: bis-(2,2,6,6-tetramethyl-4-piperidinyl) sebacate With magnesium(II) chloride hexahydrate; dihydrogen peroxide In ethanol at 75℃; for 10h; Stage #2: octane With tert.-butylhydroperoxide; molybdenum(VI) oxide at 125℃; for 3h; Reagent/catalyst; Reflux;	64.1%
With tert.-butylhydroperoxide; molybdenum(VI) oxide at 105 - 115℃; Large scale;

bis-(2,2,6,6-tetramethyl-4-piperidinyl) sebacate (52829-07-9) + butyraldehyde (123-72-8) → C36H68N2O6

Conditions	Yield
Stage #1: bis-(2,2,6,6-tetramethyl-4-piperidinyl) sebacate With tin (II) sulfate; dihydrogen peroxide In water at 20 - 25℃; for 24h; Stage #2: butyraldehyde With dihydrogen peroxide; acetic acid; iron(II) chloride In ethanol at 225℃; for 8h; Stage #3: With dihydrogen peroxide In ethanol at 25℃; for 24h;	89.02%

cyclohexane (110-82-7) + bis-(2,2,6,6-tetramethyl-4-piperidinyl) sebacate (52829-07-9) → bis(1-cyclohexyloxy-2,2,6,6-tetramethylpiperidin-4-yl) sebacate

Conditions	Yield
Stage #1: bis-(2,2,6,6-tetramethyl-4-piperidinyl) sebacate With tin (II) sulfate; dihydrogen peroxide In water at 20 - 25℃; for 24h; Inert atmosphere; Stage #2: cyclohexane With tetrabutylammomium bromide; dihydrogen peroxide; copper(II) sulfate In acetonitrile at 65℃; for 9.5h; Inert atmosphere;	83.67%

Phenyl glycidyl ether (122-60-1) + bis-(2,2,6,6-tetramethyl-4-piperidinyl) sebacate (52829-07-9) → di[2,2,6,6-tetramethyl-1-(2-hydroxy-3-phenoxypropyl)-4-piperidyl] sebacate (155302-45-7)

Conditions	Yield
With sodium hydrogencarbonate	81%

bis-(2,2,6,6-tetramethyl-4-piperidinyl) sebacate (52829-07-9) → 1-octyloxy-2,2,6,6-tetramethyl-4-hydroxy-piperidine (131807-04-0)

Conditions	Yield
With ethanol; potassium hydroxide at 70℃; for 3.5h;	80.8%

aqueous tert-butyl hydroperoxide + bis-(2,2,6,6-tetramethyl-4-piperidinyl) sebacate (52829-07-9) → bis(1-octyloxy-2,2,6,6-tetramethyl-4-piperidyl)sebacate

Conditions	Yield
In octane	80%
With sodium sulfite; hexacarbonyl molybdenum In octane; water; ethyl acetate	67%
In octane	67%

bis-(2,2,6,6-tetramethyl-4-piperidinyl) sebacate (52829-07-9) → bis(N-chloro-2,2,6,6-tetramethyl-4-piperidinyl) sebacate (111672-34-5)

Conditions	Yield
With sode de l'acide trichloroisocyanurique In water; benzene	79%
With sodium hypochlorite; Triton X-100 In water at 20℃; for 4h; pH=7.0;

bis-(2,2,6,6-tetramethyl-4-piperidinyl) sebacate (52829-07-9) + 4-tert-butylphenyl 2,3-epoxypropyl ether (3101-60-8) → Di{2,2,6,6-tetramethyl-1-[2-hydroxy-3-(4-t-butylphenoxy)propyl]-4-piperidyl} sebacate (155302-75-3)

Conditions	Yield
	77.9%

tert.-butylhydroperoxide (75-91-2) + t-butyl hydroperoxidemethylcyclohexane + bis-(2,2,6,6-tetramethyl-4-piperidinyl) sebacate (52829-07-9) → di-[1-(1-methylcyclohexyloxy)-2,2,6,6-tetramethylpiperidin-4-yl] sebacate (122586-86-1)

Conditions	Yield
With sodium chloride In methyl cyclohexane	72%
With sodium chloride In methyl cyclohexane	72%

aqueous t-butyl hydroperoxide + bis-(2,2,6,6-tetramethyl-4-piperidinyl) sebacate (52829-07-9) → bis(1-heptyloxy-2,2,6,6-tetramethylpiperidin-4-yl) sebacate

Conditions	Yield
With tert.-butylhydroperoxide In n-heptane	72%
With tert.-butylhydroperoxide In n-heptane	72%

bis-(2,2,6,6-tetramethyl-4-piperidinyl) sebacate (52829-07-9) → di-[1-(alpha-methylbenzyloxy)-2,2,6,6-tetramethylpiperidine-4-yl] sebacate (129750-00-1)

Conditions	Yield
With tert.-butylhydroperoxide In n-heptane; ethylbenzene; water	70%
With tert.-butylhydroperoxide In n-heptane; ethylbenzene; water	70%
With sodium chloride; isopropylbenzene hydroperoxide In Isopropylbenzene; n-heptane; ethylbenzene
With isopropylbenzene hydroperoxide In ethylbenzene

bis-(2,2,6,6-tetramethyl-4-piperidinyl) sebacate (52829-07-9) + benzenesulfenyl chloride (931-59-9) → bis(2,2,6,6-tetramethyl-1-(phenylthio)piperidin-4-yl)decanedioate

Conditions	Yield
With triethylamine In tetrachloromethane; dichloromethane for 13.5h;	70%

aqueous tert-butyl hydroperoxide + cyclododecane (294-62-2) + bis-(2,2,6,6-tetramethyl-4-piperidinyl) sebacate (52829-07-9) → Di-(1-cyclododecyloxy-2,2,6,6-tetramethylpiperidin-4-yl) Sebacate (122587-06-8)

Conditions	Yield
In hexane; n-heptane	69%

aqueous tert-butyl hydroperoxide + bis-(2,2,6,6-tetramethyl-4-piperidinyl) sebacate (52829-07-9) → Di-(1-cyclooctyloxy-2,2,6,6-tetramethylpiperidin-4-yl) Sebacate (122587-03-5)

Conditions	Yield
In hexane; Cyclooctan	68%

aqueous t-butyl hydroperoxide + bis-(2,2,6,6-tetramethyl-4-piperidinyl) sebacate (52829-07-9) → bis(1-cyclohexyloxy-2,2,6,6-tetramethylpiperidin-4-yl) sebacate

Conditions	Yield
With sodium sulfite In cyclohexane; water	63%
With sodium sulfite In cyclohexane; water	63%

bis-(2,2,6,6-tetramethyl-4-piperidinyl) sebacate (52829-07-9) → di-(1-benzyloxy-2,2,6,6-tetramethylpiperidin-4-yl) sebacate (122586-57-6)

Conditions	Yield
With tert.-butylhydroperoxide; hexacarbonyl molybdenum In toluene	29%

3-(2-t-butylphenoxy)-1,2-epoxypropane (40786-25-2) + bis-(2,2,6,6-tetramethyl-4-piperidinyl) sebacate (52829-07-9) → Di{2,2,6,6-tetramethyl-1-[2-hydroxy-3-(2-t-butylphenoxy)propyl]-4-piperidyl} sebacate

Conditions	Yield
	28.2%

aqueous tert-butyl hydroperoxide + bis-(2,2,6,6-tetramethyl-4-piperidinyl) sebacate (52829-07-9) → di-(1-benzyloxy-2,2,6,6-tetramethylpiperidin-4-yl) sebacate (122586-57-6)

Conditions	Yield
In hexane; toluene	24%

bis-(2,2,6,6-tetramethyl-4-piperidinyl) sebacate (52829-07-9) → bis(1-oxyl-2,2,6,6-tetramethylpiperidin-4-yl)sebacate (2516-92-9)

Conditions	Yield
With sodium tungstate; dihydrogen peroxide; edetate disodium In methanol; acetonitrile	10%

5,11,17,23-tetra-t-butyl-25,26,27,28-tetrahydroxycalix-4-arene (157432-87-6, 288302-11-4, 288302-12-5) + bis-(2,2,6,6-tetramethyl-4-piperidinyl) sebacate (52829-07-9) → 2C44H56O4*C28H52N2O4 (138847-20-8)

Conditions	Yield
In acetonitrile at 25℃; Equilibrium constant;

bis-(2,2,6,6-tetramethyl-4-piperidinyl) sebacate (52829-07-9) → bis(1-oxyl-2,2,6,6-tetramethylpiperidin-4-yl)sebacate (2516-92-9) + C28H51N2O5 (80004-15-5)

Conditions	Yield
With 3-chloro-benzenecarboperoxoic acid In dichloromethane 1) 273 K, 1 h, 2) 1 h, reflux;

benzophenone (119-61-9) + bis-(2,2,6,6-tetramethyl-4-piperidinyl) sebacate (52829-07-9) → hydroxy-diphenyl-methyl (4971-41-9) + C28H51N2O4

Conditions	Yield
In benzene Rate constant; Ambient temperature; Irradiation;

aqueous tert-butyl hydroperoxide + bis-(2,2,6,6-tetramethyl-4-piperidinyl) sebacate (52829-07-9) → bis(1-nonyloxy-2,2,6,6-tetramethylpiperidin-4-yl) sebacate (122586-76-9)

Conditions	Yield
With sodium chloride; molybdenum In nonane

bis-(2,2,6,6-tetramethyl-4-piperidinyl) sebacate (52829-07-9) → bis(1-heptyloxy-2,2,6,6-tetramethylpiperidin-4-yl) sebacate

Conditions	Yield
With sodium chloride; isopropylbenzene hydroperoxide In Isopropylbenzene; n-heptane

formaldehyd (50-00-0) + bis-(2,2,6,6-tetramethyl-4-piperidinyl) sebacate (52829-07-9) → bis(1,2,2,6,6-pentamethyl-4-piperidyl)sebacate (41556-26-7)

Conditions	Yield
With palladium on activated charcoal; hydrogen In methanol; water at 80 - 140℃; under 15001.5 - 31503.2 Torr; Solvent; Autoclave;

bis-(2,2,6,6-tetramethyl-4-piperidinyl) sebacate (52829-07-9) → 2,2,6,6-tetramethyl-4-keto-1-octyloxy-piperidine

Conditions	Yield
Multi-step reaction with 2 steps 1.1: potassium hydroxide; ethanol / 3.5 h / 70 °C 2.1: oxalyl dichloride / dichloromethane; dimethyl sulfoxide / 0.5 h / Inert atmosphere 2.2: 0.33 h / 20 °C / Cooling View Scheme

Upstream product

• 2403-88-5 4-hydroxy-2,2,6,6-tetramethylpiperidine 
• 111-20-6 1,10-decanedioic acid 
• 106-79-6 dimethyl sebacate 
• 138847-20-8 2C₄₄H₅₆O₄*C₂₈H₅₂N₂O₄ 
• 2516-92-9 bis(1-oxyl-2,2,6,6-tetramethylpiperidin-4-yl)sebacate 

Downstream Products

• 122586-57-6 di-(1-benzyloxy-2,2,6,6-tetramethylpiperidin-4-yl) sebacate 
• 41556-26-7 bis(1,2,2,6,6-pentamethyl-4-piperidyl)sebacate 
• 155302-75-3 Di{2,2,6,6-tetramethyl-1-[2-hydroxy-3-(4-t-butylphenoxy)propyl]-4-piperidyl} sebacate 
• 155302-45-7 di[2,2,6,6-tetramethyl-1-(2-hydroxy-3-phenoxypropyl)-4-piperidyl] sebacate 
• 122586-86-1 di-[1-(1-methylcyclohexyloxy)-2,2,6,6-tetramethylpiperidin-4-yl] sebacate 
• 129750-00-1 di-[1-(alpha-methylbenzyloxy)-2,2,6,6-tetramethylpiperidine-4-yl] sebacate 
• 4971-41-9 hydroxy-diphenyl-methyl 
• 2516-92-9 bis(1-oxyl-2,2,6,6-tetramethylpiperidin-4-yl)sebacate 
• 80004-15-5 C₂₈H₅₁N₂O₅ 

Relevant articles and documents

Process for preparing bis(1-alkoxy-2,2,6,6-tetramethyl-4-piperidyl) alkyl dibasic ester

The invention provides a process for preparing bis(1-alkoxy-2,2,6,6-tetramethyl-4-piperidyl) alkyl dibasic ester. The reaction synthesizing route is as shown in the specification, wherein R1 and R2 are C6-C10 alkyl. According to the method, bis(1-alkoxy-2,2,6,6-tetramethyl-4-piperidyl) alkyl dibasic ester is prepared and synthesized by a two-step method, the method is simple in operation, less inenvironmental pollution and low in cost, and is an ideal process for industrial production.

Preparation method of UV770

The invention relates to a preparation method of UV770. The preparation method comprises the following steps: (S1) adding (a) 2,2,6,6-tetramethylpiperidine alcohol with the formula shown in the specification and (b) sebacic acid with the formula shown in the specification into a reaction tank, and carrying out fusion mixing; (S2) introducing nitrogen to protect the reaction; (S3) adding titanium catalysts into the reactor, and carrying out thermal response reaction; (S4) cooling reactants to 100-110 DEG C after the reaction is finished, and immediately filtering; and (S5) cooling filtrate, separating out crystals, washing, and further refining rough products to obtain the purified product UV770, or evaporating water to directly obtain the product. The preparation method has the characteristics of high reaction efficiency and convenience in refining.

ULTRAVIOLET ABSORBER FOR SYNTHETIC RESIN AND SYNTHETIC RESIN COMPOSITION CONTAINING THE SAME

The present invention relates to an ultraviolet absorber for synthetic resins composed of a triazine compound represented by the general formula (I) shown below (wherein R represents an alkyl group having 1 to 4 carbon atoms, n is 0 or an integer of up to 2, and X represents a group selected from the consisting of group (a) to (d) shown below) (wherein R1 represents an aliphatic group having 5 to 60 carbon atoms, which is an alicyclic group, an alkyl group having an alicyclic group at the terminal or in the chain thereof, an alkyl group having a branch, or a linear alkyl group, depending on the number of carbon atoms; R2 represents an alkyl group having 1 to 18 carbon atoms or a (poly)alkyleneoxyalkyl group; R' represents an aliphatic diyl group having 5 to 60 carbon atoms; R and n have the same meanings as those described in the general formula (I) above).

Benzophenone uv-absorbers with heterocyclic substituents

Compounds having the formula: wherein R1 represents hydrogen, C1-C20 alkyl which is unsubstituted or substituted by one or more ammonium, mono-, di-, tri or tetra-C1-C12 alkylammonium groups or by one or more sulphonium groups or represents an aralkyl residue having a total of from 7 to 10 carbon atoms and, in which, the aryl group is unsubstituted or substituted by C1-C4alkyl, C1-C4 alkoxy or halogen and Z is a group selected from R2, R3 and R4, independently, representing hydrogen, C1-C4alkyl, C1-C4 alkoxy, halogen, NHCOC1-C4 alkyl or phenyl which is unsubstituted or substituted by. C1-C4 alkyl, C1-C4 alkoxy or halogen, a process for their preparation and use of the compounds of formula (1) as UV-absorbers which have improved absorption spectrum characteristics, superior resistance to exposure to UV light and excellent thermal stability, relative to known benzophenone compounds.

Phenyl ether-substituted hydroxyphenyl triazine ultraviolet light absorbers

This invention relates generally to phenyl ether substituted triazines compounds and compositions containing same and their use to protect against degradation by environmental forces. A method for stabilizing a material by incorporating such triazines is also disclosed.

4-Formyl amino-n-methylpiperidine derivatives, the use thereof as stabilisers and organic material stabilised therewith

The present invention relates to 4-formylamino-N-methylpiperidine derivatives of the formula (I) where the variables are as defined in the Description, to a process for preparing these piperidine derivatives, to the use of these piperidine derivatives of the invention, or prepared according to the invention, for stabilizing organic material, in particular for stabilizing plastics or coating materials, and also to the use of these piperidine derivatives of the invention, or prepared according to the invention, as light stabilizers or stabilizers for wood surfaces. The present invention further relates to stabilized organic material which comprises these piperidine derivatives of the invention or prepared according to the invention.

Novel red-shifted triazine ultravioletlight absorbers

The present invention relates to novel red-shifted UV absorbers comprising 1,3,5-triazine structures containing a 2-naphthol-derived substituent. The present invention also relates to a method for stabilizing a material by incorporating into such material, e.g., organic material, the novel red-shifted triazine compounds in an amount effective to stabilize the material against the effects of actinic radiation.

Synergistic UV absorber combination

A stabilizer composition comprising (A) a compound of the formula I wherein R is (CH2-CH2-O-)n-R2; -CH2-CH(OH)-CH2-O-R2; or -CH(R3)-CO-O-R4; n is 0 or 1; R2 is C1-C13alkyl or C2-C20alkenyl or C6-C12aryl or CO-C1-C18alkyl; R3 is H or C1-C8alkyl; R4 is C1-C12alkyl or C2-C12alkenyl or C5-C6cycloalkyl; and (B) one or more compounds selected from (i) to (xlv) as defined in claim 1 is especially effective towards stabilizing organic materials against degradation induced by light, heat or oxidation.

Phenyl ether-substituted hydroxyphenyl triazine ultraviolet light absorbers

This invention relates generally to phenyl ether substituted triazines compounds and compositions containing same and their use to protect against degradation by environmental forces. A method for stabilizing a material by incorporating such triazines is also disclosed.

Amino- and hydroxysubstituted triphenyl-s-triazines as stabilizers

The present invention provides compounds having the formula: in which R is hydrogen, hydroxy, halogen, C1-C20alkyl, C4-C12cycloalkyl, C2-C20alkenyl, C2-C20alkynyl, C1-C20-alkoxy, C4-C12cycloalkoxy, C2-C20alkenoxy, C2-C20alkynoxy or C7-C13aralkyl; R1 and R2, independently, are hydrogen, C1-C20alkyl, C4-C12cycloalkyl, C7-C13 aralkyl, —C(═O)-R4 (in which R4 is C1-C20alkyl, C2-C20alkyl interrupted by 1 to 6 oxygen atoms, hetero-substituted C1-C20alkyl, C4-C12cycloalkyl, C220alkenyl, C2C20alkynyl, C1-C20-alkoxy, C4-C12cycloalkoxy, C2-C20alkenoxy, C2alkynoxy, C6-C12 aryl, C6-C12 aryloxy or C7C13 aralkyl), or —C(═O)-NH-R1 in which R1 has its previous significance; and R3 is hydrogen, halogen, hydroxy, C1-C20alkyl, C4-C12cycloalkyl, C2-C20alkenyl, C2-C20alkynyl, C1-C20-alkoxy, C4-C12-cycloalkoxy, C2C20alkenoxy, C2-C20alkynoxy, phenyl, C7-C13 aralkyl or —N(R1)(R2) in which R1 and R2 have their previous significance, or R1 and R2 together form a C4-C12 membered ring. The new triphenyltriazine compounds have improved absorption spectrum characteristics and superior resistance to exposure to UV light, relative to known triphenyltriazine compounds.