Benzoin, butyl ether

NPGDA), trimethylol propane triacrylate (TMPTA), Trigonal 14 (Noury Chem. Corp. mixture of benzoin butyl ethers), benzoyl peroxide, and t-butyl perbenzoate were used as obtained from commercial suppliers without further purification. 

Lauryl acrylate polymerizations initiated by a photo-activated mixture of benzoin butyl ethers (Trigonal 14) were performed in Perkln-Elmer model DSC-IB and DSC-2 apparata modified by attachment of a heat-filtered medium pressure mercury lamp. Within specified variable limits, the rate of polymerization may be approximated by the relation Rp = const. 0.55 q0.35 2m]. 6 -316/T I js light intensity C is initiator concentration CM] is monomer concentration T is absolute temperature. 

Benzoin n-butyl ether. See Benzoin butyl ether Benzoin ethyl ether... 

Benzoin butyl ether Benzoin isobutyl ether Isobutyl benzoin ether C18H20O3... 

Two classes are known based on free radicals and hydrogen abstraction techniques, respectively. Free residual types are receptive to UV light by absorbing radiation energy such that free radicals result and these produce a chain polymerization reaction and eventually a solid polymer matrix. An example of the photoinitiation reaction sequence, which follows a Norrish I-type cleavage, is given in Fig. 12.10. Another photoinitiator would be benzoin butyl ether shown in Fig. 12.11. 

III (Higher-index inert component) Butyl methacrylate Ethylene glycol dimethacrylate 1-Phenylnaphtha1ene Benzoin methyl ether 0.5 ml 0.5 ml 0.5 ml 0.07 g Monomer Crosslinking monomer Inert Initiator 1.47 1.5 1.666... 

An unusual process features a spun polythene band ich has been impregnated with blended acrylic latices, e.g, containing 1,4-butanediol diacrylate, ethyl acrylate and acrylic acid in 1 component, and l,4 butanediol diacrylate, butyl acrylate, acrylic acid and NllAM in a second. 1 of the photosensitiser, benzoin isopropyl ether is also present. The impregnated band is drawn across an irradiation zone vdiilst resting on a thin layer of ice, thence forming a continuous leather - like band. (20)... 

The reaction of glycidyl acrylate with a-(2-carboxyethyl)benzoin methyl ether has allowed one to obtain [101] the corresponding acrylic monomer which, upon copolymerization with different amounts of MMA, butyl methacrylate and 2-(V, V-dimethylamino)ethyl methacrylate, gives rise to polymeric photoinitiators, containing side-chain benzoin methylether moieties, for photocurable coatings ... 

Materials. The polyurethane precursor materials were Adiprene L-lOO (Uniroyal, Inc.), a poly(oxytetramethylene glycol) capped with toluene diisocyanate, eq. mol. wt. 1030 1,4-butanediol (BD) and 1,1,1-trimethylolpropane (TMP) and, as catalyst, dibutyltin dilaurate (DBTDL). Acrylic precursors included n-butyl methacrylate (BMA), washed with 10% aq. NaOH to remove inhibitor tetramethylene glycol dimethacrylate (TMGDM) crosslinker and benzoin sec-butyl ether (BBE) as a photosensitizer. These materials were dried appropriately but not otherwise purified. 

Chem. Descrip. Mixt. of benzoin normal butyl ethers Uses Photoinitiator for UV-cured systems, coatings, polyester putty for particleboard... 

Synonyms Benzoin n-butyl ether n-Butyl benzoin ether 2-n-Butyl-2-phenylacetophenone... 

What happens to the final radical is uncertain. High conversions were reported in polymerizations of n-butyl vinyl ether in the presence of azobisisobutyronitrile (as a source of radicals) with ip - tolyl)2—I PFe at 50°C [55]. The above is an illustration of a thermal process [12]. Free radicals can also be generated with the aid of UV light. This, for instance, was done with a UV light decomposition of benzoin methyl ether in the presence of an oxidizing salt [56] ... 

Celanese Curaible compositions containing butyl acrylate, vinyl acetate, acrylic acid, and benzoin alkyl ethers irradiated with UV, some PSA properties given. 

The choice of photosystem varies greatly from one resist to another however, it must be compatible with the other resist components and not separate from them on standing or during electrodeposition. Sometimes a compound that acts as a photoinitiator in one resist can function as a photosensitizer in another. Examples of the more common photoinitiators are -hydroxyisobutylphenone, benzoin ethyl ether, 2-t-butyl-... 

Photolnltiator Esacure EB 3 is a stabilized liquid mixture of benzoin normal butyl ethers, which offers easy processibility even at low temperatures to a variety of UV cure systems. 

UvlmerTM 530 and the other members of the UvlmerTM series may be cured with benzoin ether type photoinitiators and with diethoxy acetophenone. Table III presents data on the cure speed of UvlmerTM 530 formulated with butyl benzoin ether. These data were obtained in air without the use of Inert blanketing. Films of 3 mil thickness were irradiated on a moving belt using a 5000 watt Addalux uv lamp (Berkey Photo, Inc.) focussed on one linear Inch, This Is a low pressure lamp Incorporated In an experimental unit. Faster cure speeds (up to 200 ft. per mlnute/lamp) were obtained in later studies with a unit employing two medium pressure, 200 watts/llnear inch Hanovia lamps. 

Benzoin Benzonitrile Benzyl acetoacetate Benzyl butyrate Benzyl ether Benzyl formate Benzyl isobutyrate Benzyl phenylacetate 2-Butanol Butyl butyryl lactate a-Butylcinnamaldehyde Butyl cinnamate ... 

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