BC-111(KCB)

Purpose:

BC-111(KCB) whitening agent is now the premium grade whitening agent among a variety of fluorescent whitening agents. It has strong whitening effect, vivid blue light, excellent heat resistance and weather resistance and chemical stability. It is mainly used for the whitening of plastics and synthetic fiber products, and also has obvious brightening effect for colored plastic products. It is also widely used in ethylene/EVA copolymers, and is the excellent fluorescent whitening agent for sports shoes. It is also widely used in plastic films, molding materials, Injection molding materials and polyester fibers such as PE, PP, PVC, PS, ABS and PMMA. It also has obvious effect for the whitening of coating and natural paint, it is the minimal toxic whitening agent among varieties of whitening agents, and it is allowed to be used for packaging material for food as stipulated by the U.S.

Usage and reference use quantity:

1. Generally, there are three methods for the whitening of plastics: whitening by dry process, whitening by wet process and whitening by masterbatch process.

For whitening by dry process, add a certain quantity of dry fluorescent whitening agent powder to plastic substrate before molding directly, first, mix them thoroughly and evenly, when the extruding machine reaches the melting temperature of plastics, extrude the evenly mixed substrate into screw for melting, then conduct granulation or compression molding.

For whitening by wet process, mix a certain quantity of fluorescent whitening agent, additive and plasticizer into even pulpy liquid, then conduct extrusion molding in batches separately with plastics.

For whitening by masterbatch process, mix fluorescent whitening agent or pigment with plastic substrate or resin throughly and evenly in advance, generally, the ratio of of fluorescent whitening agent and plastic substrate is 1:10-100, the use quantity of fluorescent whitening agent is 10-100 times more than that of whitening by dry process, the evenly mixed material can be used directly or extruded into masterbatch. The control of screw of injection molding machine is the key for uniform dispersion of masterbatch.

2. Recommended use quantity of fluorescent whitening agent:

The recommended use quantity of whitening agent for plastic or resin is generally 0.01-0.03%, i.e. about 10-30g of BC-111 fluorescent whitening agents are added to each 100kg of plastic materials. The user can adjust the specific use quantity of whitening agent in accordance with whiteness requirements, if ultraviolet absorbent such as titanium dioxide is added to plastic material, the optimal use quantity of whitening agent should be adjusted.

Reference whitening agent use quantity of PE material: 10-25g/100kg plastics raw materials

Reference whitening agent use quantity of PP material: 10-25g/100kg plastics raw materials

Reference whitening agent use quantity of PS material: 10-20g/100kg plastics raw materials

Reference whitening agent use quantity of PVC material: 10-30g/100kg plastics raw materials

Reference whitening agent use quantity of ABS material: 10-30g/100kg plastics raw materials

Reference whitening agent use quantity of EVA material: 10-30g/100kg colophony

Reference use quantity of whitening agent for transparent plastic film: 1-10g/100kg plastics raw materials

Appearance: slight yellowish-green crystalline powder

Melting point: 210-212℃

Solubility: It is insoluble in water and easily soluble in organic solvents

Toxicity: non-toxic, odorless

The maximum absorption spectral wavelength: 370nm

The maximum fluorescence emission wavelength: 437nm

20kg cardboard bucket (lined with plastic bag) packaging.

The shelf life is not less than 24 months in the room temperature.