Lucirin® TPO

Air interface orientation controlling agent, (11), 0.2 parts (unspecified) Photopolymerization initiator HJ-1, (HI), 2.0 parts by mass Lucirin TPO-L, 2.0 parts Methyl ethyl ketone, 300 parts... 

Fig. 13 Insolubilization ( ), swelling(B) and hardness(A) profiles in UV-curing of an equimolar HDDA/ELNR-70 blend. [TAS] = 3 wt % [Lucirin TPO] = 2 wt %.

Fig. 16 Capsule formation by phase separation, (a) Scheme a solution of monomer and hydrophobic oil (ie/t) is dispersed in an aqueous surfactant solution middle). Phase separation between the growing polymer and the oil occurs, leading to core shell morphology with encapsulated liquid, (b) Nanocapsules with hexadecane by phase separation [35]. (c) Encapsulation of Lucirin TPO [173] and (d) the fragrance 1,2-dimethyl-1-phenyl-butyramide [174]...

The acid sensitive photoinitiator Lucirin TPO could effectively be shielded from an acidic environment by encapsulating it into PMMA or PBA-co-PMMA particles [173]. The hybrid particles show a core-shell morphology (Fig. 16c) which is generated by phase separation during the polymerization process. While the photoinitiator is readily soluble in the monomer(s), it becomes insoluble in the polymer. Therefore, Lucirin TPO precipitates during the polymerization and forms an amorphous core surrounded by a polymeric shell. The encapsulation efficiency was determined as about 90%. 

Fig. 7 TEM images of encapsulated Lucirin TPO in polymer shells, clearly reveling core-shell morphology...

Uses Photoinitiator for coatings Regulatory Canada NDSL listed Trade Name Synonyms Greatcure TPOL [Hunan Xinyu http //www.hunanxinyu.com]-, Lucirin TPO-L [BASF AG http //www.basf.de] 2-Ethyl-4-(2,2,3-trimethyl-3-cyclopenten-1-yl)-2-buten-1-ol... 

Lucidol 70] Lucidol 75] Lucidoi 75FP, Lucidol 78] Lucidol 98] Lucidoi S. See Benzoyl peroxide Lucirin TPO-L. See Ethyl (2,4,6-trimethylbenzoyl) phenyl phosphinate Lucite 4F, 4G, 30B, 41, 47G, 6751. See Acrylic resin... 

Scott et a/., carried out Fourier transform infrared and electron spin resonance spectroscopic investigations of the photopolymerization of vinyl ester resins These consisted of studying reaction kinetics during photopolymerization of bis glycol methacrylate/styrene blends using commercial photoinitiators, Irgacure 819 and Lucirin TPO ... 

For polymerization in the liquid state, the reaction kinetics is even more complicated due to the heat and the increase in viscosity associated with the reaction, the so-caUed Tromsdorff effects [47]. The reaction accelerates itself as the polymerization proceeds as a result of a positive feedback loop generated by the increase in heat as well as in viscosity and the diffusion-controlled termination of the polymerization process [48, 49]. An example is illustrated in Figure 6.5 for a mixture of a polystyrene doubly labeled with anthracene and fluorescein (PSAF) dissolved in MMA monomer [50]. A PSAF/MMA (5/95) mixture containing 2wt% of Lucirin TPO as a photoinitiator and 6 wt% of ethylene glycol dimethacrylate (EGDMA) as a... 

Besides CQ, monoacylphosphine oxides, i.e. 2,4,6-trimelhyl benzoyldiphenyl phosphine oxide (Lucirin TPO), with an absorption maximum of Lnax=390 nm (see Figure 4.3), and the bis(2,4,6-trimethylbenzoyl)-phenylphosphine oxide (Irgacure 819), a variation of TPO with an absorption maxima of Lnax=370/400 nm, are used in dental materials (Figure 4.4) [IKE 08]. 

Figure 7.3 Molecular structures of representative photo-initiators and monomers employed in TPP. Peak two-photon cross-sections and excitation wavelengths for the photo-initiators are also reported. While Irgacure 369 (a) Lucirin TPO-L (b) and ITX (c) are commercially available radical photoinitiators, the symmetric stilbene-like structure in (d) with a D-Jt-A-Jt-D motif is a custom-made...

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