Tetraacrylate, pentaerythritol

The effect of irradiation dose and different polyfunctional monomers(PFMs) at a constant ratio of 10 phr on the physicochemical properties of a PVC formulation used as wire coating was investigated. The PFMs used were trimethylolpropane triacrylate, trimethylolpropane trimethacrylate, ethylene glycol dimethacrylate, diethylene glycol diacrylate, pentaerythritol tetraacrylate, triallyl cyanurate and 1,6-hexanediol diacrylate. The properties studied included tensile properties at room and elevated temps., softening temp., swelling characteristics and volume resistivity. 18 refs. 

The photoinitiation of polymerization of pentaerythritol tetraacrylate using phenyl-(p-anisyl)-iodonium triflate or triphenylsulfonium hexafluorophosphate, sensitized with either l,6-diphenyl-l,3,5-hexatriene or 1,3-diphenyl-2-pyrazoline, was illustrated by Smith [111b] in 1981. Under his conditions, direct photolysis of the onium initiators failed to initiate polymerization. Baumann and co-workers, however, found conditions for initiation of radical polymerization on direct irradiation of onium salts [18,122], consistent with the hypothesized generation of radicals capable of cage escape in direct photolysis. 

This strategy, and the ready availability of acrylate esters allows the straightforward synthesis of assemblies of multiple polyoxometalate units. Thus the composite star anion 11 was synthesized starting with pentaerythritol-tetraacrylate, the formation of C(CH20C0CH2CH2GeCl3)4, and subsequent reaction with [SiWn03t)] . ... 

Bis(hydroxymethyl)-1,3-propanediol, tetra(2-propenoyl) ester Pentaerythritol tetraacrylate C17H20O8 4986-89-4 362.336 17.3 1.18625 ... 

Some of the multifunctional crosslinking monomers used in emulsion polymerization include pentaerythritol tetraacrylate and trimethylolpropane triacrylate (high boiling, low viscosity, fast cure system for vinyl acrylic latex paints) [34]. 

Pentaerythritol rosinate. See Pentaerythrityl rosinate Pentaerythritol tetraacrylate. See Pentaerythrityl tetraacrylate Pentaerythritol tetrabenzoate. See Pentaerythrityl tetrabenzoate Pentaerythritol tetrakis (3,5-di-t-butyl)-4-hydroxyhydrocinnamate Pentaerythritol tetrakis [3-(3,5-di-t-butyl-4-hydroxyphenyl) propionate]. See Pentaerythrityl tetrakis [3-(3, 5 -di-t-butyl-4-hydroxyphenyl) propionate]... 

An example of a tetrafunctional monomer is pentaerythritol tetraacrylate. It can be illustrated as follows ... 

Maruyama et al, studied photopolymerization of addition products of multifunctional acrylates and aUcoxysilyl alkyl thiol. Three monomers with multiple (trimethoxysilyl)propylthio groups were prepared by them via Michael addition of the multifunctional acrylates. These were neopentyl glycol diacrylate, trimethylol propane triacrylate, and pentaerythritol tetraacrylate that were reacted with (y-mercaptopropyl)trimethoxysilane. These photocurable oligomers were then UV-irradiated using photo cationic and photo radical initiators. They found that polymerization with photo cationic initiator provided films with a high hardness and mar resistance. ... 

Ethoxylated trimethylol propane triacrylate Ditrimethylol propane tetraacrylate Dipentaerythritol pentaacrylate Ethoxylated pentaerythritol tetraacrylate Anthracenes... 

Photoinitated radical crosslinking of UPEAs was investigated further. For this study, the photoinitiator diphenyl (2,4,6-trimethylbenzoyl)-phosphine oxide (Darocur TPO, research sample CIBA Speciality Chemicals) and the crosslinker, pentaerythritol tetraacrylate were employed. UPEA polymer films of [8]o.75 -Fum 0,25 - Leu(6) composition (Scheme 3), with Mw = 56 000 Da, PDI = 1.73, Tg = 19.7°C were cast onto a hydrophobic surface with 4 % w/w photoinitiator and 1 to 5 % w/w crosslinker (Scheme 5). Films of ca. 0.13 mm thickness were exposed to a broadband UV mercury lamp with the exposure rate 10 000 mW/cm. Sample was mounted 4 cm away from the source, irradiation time was 5 min. Tensile properties after exposure were measured. 

Figm 29 A front of pentaerythritol tetraacrylate propagating in a thin layer on wood. 

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