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3.especially suitable for high temperature molding of plastic products whitening. recommended dosage. add jinan credit chemicals optical brightener 4bk for textile cotton fabric to every 100kg of material: 1. eva, polypropylene, nylon, polycarbonate and other added in 5 ~ 20g. 2.the amount of polyester fiber added in 10g ~ 40g.

Optical brightening agent er-ii by anyang general chemical is a non-ionic 1-(2-cyanostyryl)-4-(4-cyanostyryl)benzene. it is used in the whitening and brightening of coatings. optical brightening…

Whitening agents / optical brighteners are additives that impart brightness to polymers and intensify the degree of whiteness. these agents function on the basis of the ‘fluorescence effect’; they absorb light in the uv spectrum and emit light in the blue region of the visible spectrum to yield a brighter and fresher appearance to the plastic.

Optical brightening agent er-iii cas no. 13001-40-6 chemical name: 1,4'-bis(2-cyanostyryl) benzole specifications appearance slight yellow greenish powder melting point 288-201 ℃ purity ≥99% moisture content ≤0.5 application optical brightener 199 is used to the whitening process of dacron, acetic fiber, polyamide fiber, blends of terylene-cotton etc.

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