UV 안정제 및 HALS

UV 안정제는 햇빛이 유발하는 사슬 절단, 백화, 황변으로부터 플라스틱을 보호하는 첨가제입니다. They work three ways: inorganic screens (titanium dioxide, zinc oxide) reflect and absorb UV, organic UV absorbers convert UV energy to heat, and hindered amine light stabilizers (HALS) scavenge the radicals UV generates. Outdoor-durable polymers usually combine a screen or absorber with a HALS, because each addresses a different step of the same degradation. Treat them as complementary, not interchangeable.

Pigment-grade rutile titanium dioxide is the workhorse opaque UV screen for filled and pigmented plastics; zinc oxide gives a similar inorganic block with more transparency in thin sections. Here is the genuine trade-off: pigmentary titanium dioxide can be photocatalytic and actually accelerate chalking unless you specify a coated rutile grade made for durable exterior use. Specify surface-treated rutile (not anatase) wherever the part sees sunlight, and confirm the grade's weathering data before committing a formulation.

Organic UV absorbers such as octocrylene protect clear and lightly pigmented systems where an opaque screen is not acceptable, but they are consumed over time and perform poorly in thin films. The durable answer for most polyolefins and engineering plastics is a HALS, which keeps working catalytically rather than being used up. Pair an absorber with a HALS for real outdoor service life. Confirm regulatory status for any organic UV absorber in your application and jurisdiction.

• 착색 외장용 플라스틱 및 프로파일의 UV 차단 및 내후성 보호
• 옥외용 폴리올레핀 필름, 섬유, 성형품의 광안정화
• 자동차, 건축, 농업용 플라스틱의 색상 및 광택 유지
• 마스터배치 및 컴파운드의 불투명도와 UV 차단 (titanium dioxide)
• 불투명 안료를 사용할 수 없는 투명 시스템의 UV 차단 (유기 흡수제)

• Titanium dioxide u2014 PubChem
• Zinc oxide u2014 PubChem
• Octocrylene u2014 PubChem
• UV-328 등재 — 스톡홀름협약 POPs