• Journal of Adhesion and Interface
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• v.12 no.4
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• pp.138-143
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• 2011

Recently epoxy resin compositions having backbone of novolac derivatives with biphenylene compounds have been used as materials of eco-freindly EMC (Epoxy Molding Compound), because the cured epoxy resin compositions show the self-extinguishing without flame retardant additives. In this study, epoxy resin compositions were prepared and cured using novolac derivateves with biphenylene. Their propeties - structures of phenol derivatives and reactivity, thermal expansion, modulus, and thermal degradation - were obtained by DSC, DMA, TMA, TGA method. When both epoxy resin and hardenr had the biphenyl novolac structure, epoxy resin compositions showed low thermal expansion, good mechanical property, and combustion retardation.

• Polymer(Korea)
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• v.31 no.4
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• pp.273-277
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• 2007

Cyclophosphazene derivatives were synthesized in order to use as a non-halogen flame retardant for ABS. Chlorocyclophosphazene was reacted with phenol, catechol, aniline, 1,2-diaminobenzene respectively, and each product was characterized by UL94 and LOI test for ABS resin. The physical properties of the sample containing these flame retardants were also characterized. The derivative synthesized from catechol showed best flame retardancy, and the derivative from phenol exhibited the flame retardancy in which the synergic effect was shown with novolac.

• Applied Chemistry for Engineering
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• v.10 no.8
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• pp.1169-1174
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• 1999

2-Diazo-1-naphthoquinone-5-sulfonyl chloride(NQD-Cl) was synthesized from sodium 2-diazo-naphthoquinone-5-sulfonate by chlorination. NQD-Cl was esterified with hydroxybenzophenones to give several 1,2-naphthoquinone-(2)-diazide-5-sulfonic acid ester derivatives(NQD-esters). We have compared benzophenone derivatives with methoxy group to benzophenone derivatives with hydroxy group. Solubility of each NQD-ester was studied. Each of NQD-esters was formulated with novolac base resin and PS plates were manufactured. Photosensitivity, bleachability, compatible exposed time and relative sensitivity were determined by UV spectrophotometry, imaged by UV lithographic techniques, and the gray scale method. According to the number of substituted NQD group, it showed that relative sensitivity was different from gray scale method. NQD-esters with methoxy group showed a good solubility and higher sensitivity than commercial PS ones.