Hindered amine light stabilizers (HALS) are important stabilizers for long-term thermal protection of polymers, and are very effective in inhibiting polymer degradation caused by free radicals at medium and low temperatures.

 

Hindered Amine Light Stabilizers (HALS) exhibit excellent UV protection by scavenging free radicals generated by photodegradation to prevent polymer degradation. After the HALS chemical scavenges free radicals, it returns to its original structure and repeatedly scavenges free radicals for effective long-term performance.

 

hals light stabilizer can be classified according to their molecular weight (MW): HALS UV stabilizer with a low molecular weight of approximately 200 to 500 g/mole are generally referred to as low MW HALS, while nor hals stabilizer with a molecular weight of 2000 or higher are referred to as high MW HALS. In general, high molecular weight hals amine stabilizers are more effective than low molecular weight hindered amine stabilizers, and very low molecular weight hindered amine stabilizers do not provide much thermal stability at all.

 

The high efficiency of tinuvin hals light stabilizer is based on a series of complex free radical scavenging reactions. HALS oxidation is a relatively slow and temperature-dependent reaction. They are not very effective at high temperatures (above about 80°C), HALS are often used in combination with primary and secondary antioxidants, so that the combination can show a good synergistic effect.

 

For more than 30 years, TINTOLL has been committed to providing innovative high-performance light stabilizer and antioxidant solutions to meet the growing and changing technical needs of the global plastics market.

 

Type of Hindered Amine Light Stabilizer

PowerStab™ 119

CAS No. 106990-43-6

N,N',N'',N'''-tetrakis(4,6-bis(butyl-(N-methyl-2,2,6,6-tetramethylpiperidin-4-yl) amino)triazin-2-yl)-4,7-diazadecane-1,10-diamine.

PowerStab™ 123

CAS No. 129757-67-1

Bis(1-octyloxy-2,2,6,-tetramethyl-4-piperidyl)sebacate.

PowerStab™ 292

CAS No. 41556-26-7 + 82919-37-7

Bis(1,2,2,6,6-pentamethyl-4-piperidinyl)-sebacate and 1-(Methyl)-8-(1,2,2,6,6-pentamethyl-4-piperidinyl)-sebacate.

PowerStab™ 3346

CAS No. 82451-48-7

N,N'-Bis(2,2,6,6-tetramethyl-4-piperidinyl)-1,6-hexanediamine-2,4-dichloro-6-morpholino-1,3,5-triazine copolymer.

PowerStab™ 3529

CAS No. 193098-40-7

1,6-Hexanediamine, N,N'-bis(2,2,6,6-tetramethyl- 4-piperidinyl)-, polymers with morpholine-2,4,6-trichloro -1,3,5-triazine.

PowerStab™ 3853

CAS No. 167078-06-0

2,2,6,6−tetramethyl−4−piperidinyl stearate.

PowerStab™ 3853PP5

CAS No. 167078-06-0, 9003-07-0

Fatty acids, C12−21 and C18−unsaturated, 2,2,6,6−tetramethyl−4−piperidinyl esters, Polypropylene.

PowerStab™ 622

CAS No.65447-77-0

Dimethyl succinate polymer with 4-hydroxy-2,2,6,6-tetramethyl-1-piperidine ethanol.

PowerStab™ 770

CAS No. 52829-07-9

Bis(2,2,6,6-tetramethyl-4-piperidyl) sebacate.

PowerStab™ 7794

CAS No. 52829-07-9, 70624-18-9

Bis(2,2,6,6,-tetramethyl-4-piperidinyl) decanedioate and N,N'-bis(2,2,6,6-Tetramethyl-4-piperidinyl)-1,6-hexanediamine, polymer with 2,4,6-trichloro-1,3,5-triazine and 2,4,4- trimethyl-1,2-pentanamine.

PowerStab™ 944

CAS No. 71878-19-8, 70624-18-9(US)

Poly[[6-[(1,1,3,3-tetramethylbutyl)amino]-1,3,5-triazine-2,4-diyl][(2,2,6,6-tetramethyl4-piperidinyl)imino]-1,6-hexanediyl[(2,2,6,6-tetramethyl-4-piperidinyl)imino]]).

PowerStab™783

CAS No. 71878-19-8, 65447-77-0

Poly[[6-[(1,1,3,3-tetramethylbutyl)amino]-1,3,5-triazine-2,4-diyl][(2,2,6,6-tetramethyl-4-piperidinyl)imino]-1,6-hexanediyl[(2,2,6,6-tetramethyl-4-piperidinyl)imino]]).

PowerStab™ 945

CAS No. 124172-53-8

N,N’-bisformyl-N,N’-bis-(2,2,6,6-tetramethyl-4-piperidinyl)-hexamethylendiamine.

PowerStab™ 144

CAS No. 63843-89-0

Bis(1,2,2,6,6-pentamethyl-4-piperidinyl)-[[3,5-bis(1,1-dimethylethyl)-4-hydroxyphenyl]methyl]butylmalonate.

PowerStab™ 152

CAS No. 191743-75-6

2-Aminoethanol reaction products with cyclohexane and peroxidized N-butyl-2,2,6,6-tetramethyl-4-piperidinamine-2,4,6-trichloro-1,3,5-triazine reaction products.

PowerStab™ 2020

CAS No. 192268-64-7

1,6-Hexanediamine, N,N’-bis(2,2,6,6-tetramethyl-4-piperidinyl)-polymer with 2,4,6-trichloro-1,3,5-triazine, reaction products with N-butyl-1-butanamine and N-butyl-2,2,6,6-tetramethyl-4-piperidinamine.

PowerStab™ 505

CAS No. 152261-33-1

Alkenes, C20-24 alpha-, polymers with maleic anhydride, reaction products with 2,2,6,6-tetramethyl-4-piperidinamine.

PowerStab™ 856

CAS No. 42774-15-2

N,N'-bis(2,2,6,6-tetramethyl-4-piperidyl)isophthalamide.

PowerStab™ 111

CAS No. 106990-43-6, 65447-77-0

A bend of methylated high molecular weight light stabilizer (PowerStab 119) and oligomeric PowerStab 622.

PowerStab™ 791

CAS No. 71878-19-8, 52829-07-9

50%HALS 944+50%HALS 770.

What Is the Mechanism of Action of Hindered Amine Light Stabilizer?

Hindered amine light stabilizers (HALS) do not absorb UV radiation, but inhibit polymer degradation. They slow photochemically induced degradation reactions to some extent similar to antioxidants.

 

One of the advantages of HALS is that no specific layer thickness or concentration limits are required to guarantee good results. Remarkable plateaus are achieved at relatively low concentrations. The high efficiency and long life of HALS is due to a cyclic process where HALS are regenerated rather than consumed during stabilization.

 

The mechanism by which hindered amine stabilizers resist thermal oxidation appears to be complex. Due to the regenerative nature of the process, and the generally high molecular weight of the light stabilizers, hindered amine stabilizers can provide extremely long-term thermal and light stability.

 

The mechanism of HALS involves several different reactions that lead to their stabilization against photooxidation. The radical-scavenging properties of carbon radicals, the reaction of HALS metabolites with peroxyl radicals, and the decomposition of hydroperoxides have been discovered, as follows.

 

Applications of Hindered Amine Light Stabilizers (HALS Chemical)

 

Our Hindered Amine Light Stabilizers (HALS) deliver superior outdoor durability for a wide range of industrial applications:

 

Automotive Coatings: Prevent UV-induced fading, cracking, and degradation in exterior paints, clear coats, and interior plastic components.

 

Agricultural Films: Extend the service life of greenhouse and mulch films by resisting photo-degradation from prolonged sunlight exposure.

 

Construction Materials: Enhance the weatherability of vinyl siding, plastic piping, and outdoor textiles against UV damage.

 

Industrial Coatings: Boost yellowing resistance and long-term gloss retention for both interior and exterior coating systems.

 

As a professional hindered amine light stabilizers suppliers, tintoll is always at your service!