PowerSorb

  Free radical photoinitiators  react differently when exposed to UV light. Depending on their reactivity, they are classified as Norrish photoinitiator type 1 and 2 .   Norish type i photoinitiator   are typically compounds containing a benzoyl group which, when exposed to UV light, cleaves to produce two highly reactive free radicals, at least one of which reacts with the monomer to initiate polymerization. Type I photoinitiators are irreversibly incorporated into the polymer matrix.   Norrish Type II photoinitiators require hydrogen donors to react when exposed to UV light, and the most common of these hydrogen donors are amines (amine synergists). Upon UV irradiation, the Type II photoinitiator abstracts a hydrogen atom from the synergist used to form two very reactive alkylamino radicals, which subsequently initiate polymerization. Type II photoinitiators are generally not incorporated during the reaction, but synergists are incorporated.   TINTOLL is ...

  Benzotriazole UV absorbers are excellent cost-effective UV absorbers that have balanced UV absorption bands from short wavelengths to long wavelengths. Benzotriazole UV absorber s have exceptional UV absorption from 300 to 380 nm and are commonly used to enhance the durability of various engineering plastics and polyolefins.   Benzotriazole UV absorbers, including PowerSorb 1000, PowerStab 109, PowerStab 111 and PowerStab 123, have good heat resistance, can be used at a relatively high processing temperature, and are widely used in occasions that require long-term use.   Benzotriazole UV absorbers are compatible with a wide variety of polymer systems and additives. These benzotriazole UV absorbers are effective against loss of gloss, cracking, blistering, and discoloration. When combined with hindered amine light stabilizers (HALS), both benzotriazole UV protection and cost performance can be improved, especially when stabilizing thin sheets.   Since 1989, TINTOLL ...

  Benzophenone UV absorbers are general purpose UV absorbers commonly used in polyolefin applications and can be incorporated into a range of polymer products. These benzophenone UV absorbers have good absorption in the wavelength range from 260 to 350 nm and are stable throughout processing.   Benzophenone UV absorbers have excellent compatibility with various resins and are widely used not only as plastic additives but also in applications such as coatings and synthetic resin adhesives.   Benzophenone UV absorbers provide protection for thick and thin sections and are optimized when used in unpigmented or lightly tinted formulations. When used in combination with hindered amine light stabilizers (HALS), the benzophenone UV protection can be improved, especially when stabilizing thin sections.   Since 1989, TINTOLL  has actively participated in the development of innovative light stabilizers and application research, and currently has more than 100 specialty pr...

  Benzoate UV absorbers can increase the resistance of polyolefins to harmful UV light by scavenging free radicals formed during photo degradation of plastic materials. The use of benzoate UV absorbers together with the hindered amine light stabilizer (HALS) creates a synergistic effect, providing superior performance over HALS alone, especially in polyolefin substrates. The HALS UV absorber  has good compatibility with polyolefin substrates, is resistant to extraction, and can be used in many types of polyolefins.   Since 1989, TINTOLL  has actively participated in the development of innovative HALS UV absorbers and application research, and currently has more than 100 specialty products to meet the diverse needs of customers. TINTOLL provides professional formulations for different composite materials. In addition, TINTOLL also provides customers with light stabilizer development services for special applications.   Types of Benzoate UV Absorber PowerSorb™ 101...