UV curing systems for automotive refinish applications

Stropp, J.P.; Wolff, U.; Kernaghan, S.; Löffler, H.; Osterhold, M.; Thomas, Helen

doi:10.1016/j.porgcoat.2005.08.013

Cited by 21 publications

(16 citation statements)

References 2 publications

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“…Crosslinking structures form rapidly within 1 min or less under UV radiation. [11][12][13] Experimental Materials Isophorone diisocyanate (IPDI, Junsei Chemical Co., Ltd.) was vacuum distilled before use. Polytetramethylene glycol (PTMG, Mn = 2000, Daicel Chemical Industries Ltd.) and polydimethylsiloxanes (PDMS, C OH = 60 mgKOH/g, Dow Chemical Co.) were desiccated at 110°C before use.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of UV crosslinkable waterborne siloxane–polyurethane dispersion PDMS-PEDA-PU and the properties of the films

et al. 2008

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A UV crosslinkable waterborne siloxanepolyurethane dispersion, PDMS-PEDA-PU, was synthesized by incorporating acrylate groups into the side chain of the polyurethane using pentaerythritol diacrylate (PEDA). Polysiloxane groups were introduced into the soft segment of the polyurethane using polydimethylsiloxane (PDMS). They formed a crosslinking structure after UV radiation. The structure of PDMS-PEDA-PU was confirmed by the use of Fourier transform infrared spectroscopy (FTIR). X-ray diffraction (XRD) analysis indicated that the formed PDMS-PEDA-PU was amorphous. The curing rule of PDMS-PEDA-PU was investigated on the basis of the change in C=C conversion during the UV curing process. The influence of the PDMS/PEDA ratio was studied with respect to the water resistance, the thermal property, and the mechanical property of the films.

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Section: Introductionmentioning

confidence: 99%

Synthesis of UV crosslinkable waterborne siloxane–polyurethane dispersion PDMS-PEDA-PU and the properties of the films

et al. 2008

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“…Moreover, the light-induced processes play a key role in the microelectronics [15] and electronics industry by applying photocured conductive adhesives or by creating printed circuits [16]. Photopolymerization is also useful in the automotive industry [17], using light for photocurable coatings applied to selected elements of the car [18]. Another currently developing and interesting use of photoinduced processes of polymerization is the manufacture of (holographic) optical elements [19] and microfluidic devices [20,21].…”

Section: Introductionmentioning

confidence: 99%

Development of New High-Performance Biphenyl and Terphenyl Derivatives as Versatile Photoredox Photoinitiating Systems and Their Applications in 3D Printing Photopolymerization Processes

et al. 2019

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Novel 2-amino-4-methyl-6-phenyl-benzene-1,3-dicarbonitrile derivatives were proposed as photosensitizes of iodonium salt for a highly effective bimolecular photoinitiating system upon soft irradiation conditions under long-wave ultraviolet (UV-A) and visible light. Remarkably, these structures are highly versatile, allowing access to photoinitiating systems for the free-radical polymerization of acrylates, the cationic photopolymerization of epoxides, glycidyl, and vinyl ethers, the synthesis of interpenetrated polymer networks (IPNs) and the thiol-ene photopolymerization processes. Excellent polymerization profiles for all of the monomers, along with the high final conversions, were obtained. The initiation mechanisms of these bimolecular systems based on the 2-amino-4-methyl-6-phenyl-benzene-1,3-dicarbonitrile derivatives were investigated using the real-time FT-IR technique, steady-state photolysis, fluorescence experiments, theoretical calculations of molecular orbitals, and electrochemical analysis. Moreover, the 2-amino-4-methyl-6-phenyl-benzene-1,3-dicarbonitrile derivatives were investigated as a type II free-radical photoinitiator with amine. It was confirmed that the 2-amino-4-methyl-6-phenyl-benzene-1,3-dicarbonitrile derivatives, in combination with different types of additives, e.g., amine as co-initiator or in the presence of onium salt, can act as a bimolecular photoinitiating system via the photo-reduction or photo-oxidation pathways, respectively.

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“…Ultraviolet light is harmful to humans, plants, ecosystems, and the environment . Consequently, the development of UV absorbers is constantly being refined through numerous research efforts to meet different requirements and applications . The derivatives of 2‐hydroxyarylbenzotriazoles (Tinuvins, Ciba) have been functionally modified at either C3′ or C5′ position (see Figure ) to improve their absorption efficiency.…”

Section: Introductionmentioning

confidence: 99%

A Highly Efficient UV‐C Absorber Based on Theoretical and Experimental Studies

Chen

Shih

Lin

et al. 2017

J Chinese Chemical Soc

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Based on two published UV absorbing molecules 2-(5 0 -tert-butyl-2 0 -hydroxyl)benzotriazole (Tinuvin-PS) and hydroxybenzophenone (HBP), both having characteristic absorption capability, a refined UV absorber, 2-(3 0 -benzoyl-2 0 -hydroxy-5 0 -tert-butylphenyl)benzotriazole, has been synthesized. This new UV absorber exhibits a wider absorption range and better thermal stability compared to either Tinuvin-PS and HBP and a higher absorption efficiency in the UV-C range. Theoretical studies reveal that the UV-C absorption arises from the electron density transfer from the Tinuvin-PS moiety to the HBP moiety and the enhanced absorption efficiency is ascribed to the presence of the carbonyl's π system.

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UV curing systems for automotive refinish applications

Cited by 21 publications

References 2 publications

Synthesis of UV crosslinkable waterborne siloxane–polyurethane dispersion PDMS-PEDA-PU and the properties of the films

Synthesis of UV crosslinkable waterborne siloxane–polyurethane dispersion PDMS-PEDA-PU and the properties of the films

Development of New High-Performance Biphenyl and Terphenyl Derivatives as Versatile Photoredox Photoinitiating Systems and Their Applications in 3D Printing Photopolymerization Processes

A Highly Efficient UV‐C Absorber Based on Theoretical and Experimental Studies

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