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UV Stabilizer, what and why need in Ink

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UV Stabilizer, what and why need in Ink

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The Product should be not be confused with the light stabiliser which are added to polymers to prevent their degradation on exposure to UV radiation from sunlight

The Product should be not be confused with the light stabiliser which are added to polymers to prevent their degradation on exposure to UV radiation from sunlight

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UV Stabilizer, what and why need in Ink

  1. 1. The Selection of Stabiliser substances that are used to prevent a chemical process of pre polymerization By: Ir. Sugeng Endarsiwi
  2. 2. UV protective additives fall into two categories: – Absorbers – Stabilizers. UV absorbers dissipate the energy in a less damaging form, while UV stabilizers act as scavengers, reducing the reactivity of any free radicals formed within the coating.
  3. 3. Stabilizer (UV) in-can stabilizer. It retains viscosity and acts as rheology modifier. It has no effect on reactivity is a polymerisation inhibitor in acrylic acid ester. It is a stabilizer for radically curable inks (UV/EB). The product has good solubility in acrylates and methacrylates, and it maintains reactivity and viscosity. Compared to hydroquinone (HQ) and the hydroquinone mono methylether (HQME) GENORAD* 16 has low or no effect on the reactivity of the system. It can be used in offset inks, letterpress inks, screen inks, flexo inks, inkjet and wood applications
  4. 4. UV absorber is an ultraviolet light absorber (Uva) additive. UV stabilizer range contains two types of light stabilizers: Ultraviolet Light Absorbers (UVA) and Hindered-Amine Light Stabilizers (HALS), used individually or as blends. UVA filter harmful UV light and help prevent color change and delamination of coatings, adhesives and sealants. HALS trap free radicals once they are formed and are effective in retaining surface properties such as gloss and prevent cracking and chalking of paints. The combination of these two families is highly synergistic. UV Absorbers soak up detrimental UV rays from sunlight, converting them into heat, which is then dissipated through the surface of the coating
  5. 5. The baseline formulations containing no stabilizers or UV absorbers underwent the greatest alterations during the exposure period. These included increased yellowness and color changes as well as gloss reduction and the development of defects such as whitening, blistering, cracking and flaking on all tested panels.
  6. 6. No Stabilizer, ink will tent to gelled Expired faster Will not running longer at press

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