Optical brighteners for plastics
Grades that dissolve into the polymer melt and survive it. Selection here runs on melting point, thermal stability and affinity for the specific resin.
9 grades in this category
Optical brightener EBF
A benzoxazole-thiophene brightener, C.I.
Optical brightener PF
C.I.
Optical brightener ER-II
The 199:1 isomer of the ER family, carried for customers whose specification names C.I.
Optical brightener ER-I
C.I.
Optical brightener KSN
The migration-resistant grade.
Optical brightener KCB
A naphthalene-bridged bisbenzoxazole developed for EVA foam, and still the first choice for footwear midsoles.
Optical brightener FP-127
A methoxy-substituted distyryl biphenyl built for soft PVC.
Optical brightener OB-1
The heat-resistance specialist.
Optical brightener OB
The workhorse of the benzoxazole family and the grade most plastics buyers are matching when their specification says Uvitex OB or Tinopal OB.
Grade comparison
| Grade | C.I. number | CAS number | Appearance |
|---|---|---|---|
| Optical brightener EBF | 185 | 12224-41-8 | Slight yellow crystal powder |
| Optical brightener PF | 135 | 12224-12-3 | Light yellow crystal powder |
| Optical brightener ER-II | 199:1 | 13001-38-2 | — |
| Optical brightener ER-I | 199 | 13001-39-3 | Yellowish green powder |
| Optical brightener KSN | 368 | 5242-49-9 | Yellowish green crystal powder |
| Optical brightener KCB | 367 | 5089-22-5 | Yellowish green crystal powder |
| Optical brightener FP-127 | 378 | 40470-68-6 | Light Yellow powder |
| Optical brightener OB-1 | 393 | 1533-45-5 | Yellowish green crystal powder |
| Optical brightener OB | 184 | 7128-64-5 | Light yellow powder |
Background from our technical library
Optical brighteners for plastics are a kind of fluorescent dye, also called fluorescent brightening agents, optical brightening agents, fluorescent whitening agents, white dyes, or colorless dyes. It is widely used in the plastic industry. An optical brightener for plastic must have the following properties: (1) The whitening effect should be good. (2) High-temperature stability. (3) has a high sublimation fastness and sunlight and other weather fastnesses. (4) Good compatibility with plastics and good dispersion in them. (5) solvent resistance, migration resistance, and chemical stability should be good, with no exudation and extraction. (6) The processing of plastics (such as fluidity, lubrication, printing, and finishing) and the use of performance (such as electrical properties, physical and mechanical properties, aging resistance, etc.) have no effect. (7) It should have chemical resistance, electrical insulation, etc. (8) should be non-toxic, and odorless. The above points are general requirements for optical brighteners for plastic. Actually, few optical brighteners have all these requirements. So in the actual usage, clients should choose the best-matched optical brighteners depending on the purpose and specific circumstances. Shandong Grand Chemical Co., Ltd. is a professional manufacturer of optical brighteners for plastic
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