Suqian Unitechem Co., Ltd.

No. 22, Nanhua Road, Suqian Ecological, Chemical Technological Industrial Park, 223800 Suqian, Jiangsu
Telephone +86 527 84393669
Fax +86 527 84393779


Hall map

K 2016 hall map (Hall 7, level 1): stand E03-26

Fairground map

K 2016 fairground map: Hall 7, level 1

Our range of products

Product categories

  • 01  Raw materials, auxiliaries
  • 01.10  Additives
  • 01.10.002  Additives, other

Our products

Product category: Additives, other


Hindered Amine Light Stabilizers (HALS) are derivatives of 2,2,6,6-tetramethyl piperidine and are among the most efficient stabilizers against light-induced degradation of most polymers, especially PP and PE. Their high efficiency and longevity, resulting in a relatively low concentration required to achieve significant levels of stabilization are due to a cyclic process wherein the HALS are regenerated rather than consumed during the stabilization process. This substance significantly prevents paint layers from crackin and flaking exposed to sunlight, particularly in car paints; works well with benzotriazole UV absorbers, widely used in all types of polymers including PVC.

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Product category: Additives, other


UV absorbers are used frequently in plastics, including cosmetics and films. Different UV stabilizers are utilized depending upon the substrate, intended functional life, and sensitivity to UV degradation.
UV (Ultraviolet) absorbers, such as benzophenones, work by absorbing the UV radiation and preventing the formation of free radicals.
Oxidation is a chemical reaction that transfers electrons or hydrogen from a substance to an oxidizing agent, producing free radicals. In turn, these radicals can start chain reactions which cause damage to the material. Antioxidants terminate these chain reactions by removing free radical intermediates, and inhibit other oxidation reactions. They do this by being oxidized themselves, so antioxidants are often reducing agents such as polyphenols.
Polymers containing double bonds in their main chains, such as natural rubber and polybutadiene, are especially susceptible to oxidation. Oxidation and UV degradation are also frequently linked, mainly because UV radiation creates free radicals by bond breakage. Other polymers susceptible to oxidation include polypropylene and polyethylene. The former is more sensitive owing to the presence of secondary carbon atoms present in every repeat unit with which the radicals formed are more stable than those formed on a primary carbon atom.

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Product category: Additives, other


Light stabilizing additives, especially highly effective ones, are likely to suffer from uneven distribution during the blending process. A common practice is to pre-blend the additives into master batches (MB), a type of target material granules with relatively higher concentration of the featured additive, or additive combinations. Apart from more even distribution, the adoption of master batches greatly reduces dust formation which causes waste and worse, pollution.

Our master batches are widely used in functional film, artificial turf, plastic woven bags etc.

General Composition

Generally, light stabilizing master batches are designed to be resistant against UV. Therefore the majority combine at least antioxidants and light stabilizers. Most antioxidants and most light stabilizers are suitable for preparing master batches.

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