Compounding — Process Challenge

プラスチック用UV・光安定剤(HALS)

屋外用途、自動車、農業資材用プラスチックメーカーは、紫外線によるチョーキング、黄変、脆化を防止するため光安定剤を添加。入射UVを遮蔽するUV吸収剤(ベンゾトリアゾール/ベンゾフェノン)と、光酸化サイクルを遮断するHALSラジカルトラップに大別され、機能別およびTinuvin/Chimassorb商標名での検索が行われる
Updated Jun 2026
ソリューションアプローチ

RawSource supplies the base chemicals that go into these programs. We can help with product selection, grade matching, and sourcing from multiple origins for supply security.

Typical Formulation Workflow
1
Polymer & Process Definition
Identify the resin and process (extrusion, molding, film) and the targets — thermal stability, clarity, flame retardance, slip, or color.
2
Additive Selection
Match stabilizers, antioxidants, plasticizers, lubricants, flame retardants, or masterbatch carriers to the polymer and processing temperatures.
3
Compounding Trial
Confirm loading and dispersion on a compounding or molding trial, checking processability, mechanicals, and aesthetics against the control.
4
Validation & Scale-Up
Verify long-term performance (heat aging, migration, weathering) and lock the formulation, packaging, and lot specs for production.
Recommended Chemistries (4)
UV-328 Benzotriazole UV Absorber (Tinuvin 328 Type)
CAS 25973-55-1
特殊添加剤
Organic UV absorber
Hydroxyphenyl-benzotriazole UV absorber; absorbs 300-380 nm UV and dissipates it as heat to protect the polymer from chain scission
Physical Description: Dry powder, pellets or crystals, or solid   Appearance: White to yellow powder or crystals   Solubility: In water, log -1.37
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Benzophenone-3
CAS 131-57-7
特殊添加剤
UVカット
Benzophenone UV absorber; harmlessly dissipates absorbed UV energy as a low-cost broad screen
融点:66 °C   沸点:150–160 °C at 5 mmHg   密度:1.32 at 25 °C
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Bis(2,2,6,6-tetramethyl-4-piperidyl) sebacate (HALS, Tinuvin 770 type)
CAS 52829-07-9
Hindered-amine light stabilizer; the nitroxyl/NO regenerative cycle scavenges chain-propagating free radicals to interrupt photo-oxidation (not a UV absorber) (source on demand)
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Polymeric HALS (Chimassorb 944 type)
CAS 71878-19-8
High-molecular-weight oligomeric HALS with low volatility and extraction resistance for thick sections and long outdoor service life (source on demand)
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