EFKA 6725
Derivative of 2,4-Dihydroxybenzophenone
Efka Additives
抗光剂/紫外吸收剂 >> 苯甲酮
Light stabilizer / UV-absorber >> Benzophenone
醇酸树脂
Alkyd Resins
涂层 >> 由溶剂生成
Coatings >> Solventborne
涂层 >> 无溶剂/ 高固体
Coatings >> Solvent-Free/ High-Solids
Isobutanol, Xylene, Water
Properties: EFKA-6725 transforms the ultra violet component of the daylight (300 - 400 nm)
into harmless heat, thus eliminating the destructive action of UV-light. EFKA-6725
contains a reactive group that cross-links with the alkyd-resins structure during
the oxidative drying. EFKA-6725 therefore becomes an integral part of the film.
This means:
long lasting activity because there is no migration and agglomeration of the
absorber and no leaching by moisture transfer. Due to the interfacial character
of EFKA-6725 it orientates strongly at the film surface thereby reducing the
degradation of the pigmented film.
EFKA-6725 also possesses excellent compatibility with alkyd paints and
varnishes.
Application: EFKA-6725 can be used in all kinds of oxidative drying paints and varnishes in
order to improve UV-stability.
In low pigmented or unpigmented varnishes: 1 - 3% on the final formulation. In
pigmented coatings with insufficient light fastness: 0.5 - 1.0% based on the final
formulation.
Incorporation: EFKA-6725 should be added at the end of the manufacture of the batch.
Reactive UV-Absorber for air-drying coatings. Transforms the ultra violet component of the daylight (300 - 400 nm) into harmless heat, thus eliminating the destructive action of UV-light. Contains a reactive group that cross-links with the alkyd-resins structure during the oxidative drying. Becomes an integral part of the film. Provides long lasting activity because there is no migration and agglomeration of the absorber and no leaching by moisture transfer. Due to its interfacial character, it orientates strongly at the film surface thereby reducing the degradation of the pigmented film. Possesses excellent compatibility with alkyd paints and varnishes. Can be used in all kinds of oxidative drying paints and varnishes to improve UV-stability.
Recommended usage level: In low pigmented or unpigmented varnishes: 1 - 3% on the final formulation. In pigmented coatings with insufficient light fastness: 0.5 - 1.0% based on the final formulation. Should be added at the end of the manufacture of the batch.