info

product name:

Light stabilizer 791

cas No. :

70624-18-9&52829-07-9

MF :

N/A

MW :

N/A

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Detail

Quick Details

Synonyms:

Tinuvin 791;

Chimassorb 791;

Photostabilizer 791

CAS:

70624-18-9&52829-07-9

71878-19-8&52829-07-9

Properties

Item

Specifications

Results

Appearance

White to yellowish powder

Conforms

Melting point

80~130℃

Conforms

Volatile

≤0.5%

0.38%

Ash

≤0.1%

0.07%

425nm

≥93%

93.4%

500nm

≥95%

96.1%

Conclusion

The results conforms with enterprise standards

 

Description

Light stabilizer 791 is a high molecular weight compound hindered amine light stabilizer. It is a mixture of light stabilizer 944 and light stabilizer 770. It has the synergistic effect of large and small molecule hindered amine light stabilizers, which can provide good surface protection for polymers and maximize the protection of polymers from ultraviolet radiation and Degradation caused by prolonged heat. Light stabilizer 791 has excellent long-term stability to light and heat, and has low volatility, migration resistance, and extraction resistance. It is mainly used in PP, PP / EPDM and PP / PE / EPDM blends, and PP and HDPE flat yarns. It is especially suitable for thick polypropylene products, such as automobile bumpers, dashboards, garden tables and chairs. It also shows good efficacy in polypropylene flat yarn.

Recommended dosage

Thick products (PP): 0.1-0.8%;

Flat yarn (PP, HDPE): 0.1-0.8%;

It is recommended to be used with UV absorbers (such as Tinuvin326, Tinuvin327, Tinuvin328, Chimassorb81) in products that do not need to be tinted or slightly tinted, or to improve the light fastness of an organic pigment.

The specific formulation amount should depend on different materials and final performance requirements.

Precautions

Avoid sunlight, humidity, and high temperature, and avoid contact with stabilizers, flame retardants, or pesticides containing sulfur or halogens. Test before use.

Packaging

25kg/carton

Storage

Store in a dry, well-ventilated place away from direct sunlight.

COA,