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Papers by Sundaram Logaraj

본 발명은, 도로 표면의 포장용 중온-믹스 아스팔트 포뮬레이션을 위한 첨가제 패키지에 관한 것으로, 상기 첨가제 패키지는 a) 계면활성제 성분, 및 b) 아스팔트 레올로지 개... more 본 발명은, 도로 표면의 포장용 중온-믹스 아스팔트 포뮬레이션을 위한 첨가제 패키지에 관한 것으로, 상기 첨가제 패키지는 a) 계면활성제 성분, 및 b) 아스팔트 레올로지 개질 성분을 포함하고, 상기 아스팔트 레올로지 개질 성분은, i) 왁스 성분 및 ii) 수지 성분 중 하나 이상을 포함한다. 본 발명은 또한, 상대적으로 낮은 온도에서 향상된 압착성을 가진 중온 믹스 아스팔트, 및 상기 중온 믹스 아스팔트로부터 제조되는 도포포장재에 관한 것이다.

Tetrahedron, 1994

Enantioselective induction by some cbiral lithium alkoxides in the addition of methyllithium to b... more Enantioselective induction by some cbiral lithium alkoxides in the addition of methyllithium to benzaldehyde has been examined. A detailed study of Zsubstituted lithium I-phenyl-2-(N,Ndimethyhunino)ethoxides ia the addition of achiral alkyllithium reagents to aldehydes in THF and diethyl ether at-78 'C has been cat?ied out. The ee's are generally higher in the former solvent. The configuration of the newly formed chiraI center is opposite to that of the l-carbon of the a&oxide and independent of that of its 2-carbon atom. 'Ihe cc of the product is generally increased by increasing the size of 2-suI!&ituent. Enantiosekctivity is decreased by the addition of LiC1 and LiCIO, but is little affected by the presence of the predominant enantiomer of the lithium alkoxide produced in the reaction.

an additive package for asphalt formulations dun additive package for asphalt formulations for wa... more an additive package for asphalt formulations dun additive package for asphalt formulations for warm mix pavement surfaces dee warm mix for paving road surfaces, said additive package comprising a) road, comprising said additive package a) 20- 60% by weight, based on the total weight of paqu of 20-60% by weight, based on the total weight of the additive package surfactant component, b) 30-80ete additive surfactant component, b) 30-80% by weight the additive package of a component weight% of the additive package of a component that modifies the rheology of asphalt, wherein said modifies the rheology of asphalt, wherein said component that modifies the rheology of co-component asphalt modifies the rheology of the bitumen comprises at least one of i) a wax component ymprende at least one of i) a wax component and ii) a resin component, formulating the paqu ii) a resin component, formulating p aquete additive in a free-flowing solid powder, ete additive in a free-flowing solid powder, pe...

L'invention concerne, de maniere generale, un ensemble d'additifs destine a des formulati... more L'invention concerne, de maniere generale, un ensemble d'additifs destine a des formulations d'asphalte melangees a chaud destinees a la chaussee des surfaces routieres, cet ensemble d'additifs comprend a) un composant tensioactif, et b) un composant modifiant la rheologie de l'asphalte, ce composant comprenant au moins i) un composant de cire et ii) un composant de resine. L'invention concerne egalement un asphalte melange a chaud a compaction amelioree a des temperatures inferieures, et une chaussee fabriquee a partir de cet asphalte melange a chaud.

Tetrahedron, 1988

The conjugate addition of phenylmagnesium bromide to benzalacetomesitylene (1) was studied. The o... more The conjugate addition of phenylmagnesium bromide to benzalacetomesitylene (1) was studied. The only product resulting from 1,4-addition was Kohleis ketone (4) in 84 f 1% yield based on (1) by isolation and analysis. The byproducts from 4 were formed mainly by oxidation of the 2 enol of 4 to the a-ketohydroperoxide (6) during the hydrolysis and workup of the product followed by subsequent decomposition of 6 to diphenylethanal and a trace of 2,4,6+rimethylphenol. The other byproducts which were formed during the preparation of phenyl~gn~ium bromide are biphenyl, and trace amounts of phenol and 1-phenyl"l-ethanol. No trace of the previously reported3 a-bromoketone (5) was found under these conditions. The E enol was prepared by the enolization reaction of Kohieis ketone (4) with ~~ylmagnesium iodide followed by hydrolysis. The E enol appeared at a retention time of 3.6 compared with that of the 2 enol at 4.1 on the HPLC chromatograms. The relative rates of oxidation of the enofs as determined by following the disappearance the respective HPLC peaks were approximately 7: 1 for Z:E respectively. An explanation is presented for the faster oxidation of the 2 enol.

Acta Crystallographica Section E Structure Reports Online, 2004

본 발명은, 도로 표면의 포장용 중온-믹스 아스팔트 포뮬레이션을 위한 첨가제 패키지에 관한 것으로, 상기 첨가제 패키지는 a) 계면활성제 성분, 및 b) 아스팔트 레올로지 개... more 본 발명은, 도로 표면의 포장용 중온-믹스 아스팔트 포뮬레이션을 위한 첨가제 패키지에 관한 것으로, 상기 첨가제 패키지는 a) 계면활성제 성분, 및 b) 아스팔트 레올로지 개질 성분을 포함하고, 상기 아스팔트 레올로지 개질 성분은, i) 왁스 성분 및 ii) 수지 성분 중 하나 이상을 포함한다. 본 발명은 또한, 상대적으로 낮은 온도에서 향상된 압착성을 가진 중온 믹스 아스팔트, 및 상기 중온 믹스 아스팔트로부터 제조되는 도포포장재에 관한 것이다.

Tetrahedron, 1994

Enantioselective induction by some cbiral lithium alkoxides in the addition of methyllithium to b... more Enantioselective induction by some cbiral lithium alkoxides in the addition of methyllithium to benzaldehyde has been examined. A detailed study of Zsubstituted lithium I-phenyl-2-(N,Ndimethyhunino)ethoxides ia the addition of achiral alkyllithium reagents to aldehydes in THF and diethyl ether at-78 'C has been cat?ied out. The ee's are generally higher in the former solvent. The configuration of the newly formed chiraI center is opposite to that of the l-carbon of the a&oxide and independent of that of its 2-carbon atom. 'Ihe cc of the product is generally increased by increasing the size of 2-suI!&ituent. Enantiosekctivity is decreased by the addition of LiC1 and LiCIO, but is little affected by the presence of the predominant enantiomer of the lithium alkoxide produced in the reaction.

an additive package for asphalt formulations dun additive package for asphalt formulations for wa... more an additive package for asphalt formulations dun additive package for asphalt formulations for warm mix pavement surfaces dee warm mix for paving road surfaces, said additive package comprising a) road, comprising said additive package a) 20- 60% by weight, based on the total weight of paqu of 20-60% by weight, based on the total weight of the additive package surfactant component, b) 30-80ete additive surfactant component, b) 30-80% by weight the additive package of a component weight% of the additive package of a component that modifies the rheology of asphalt, wherein said modifies the rheology of asphalt, wherein said component that modifies the rheology of co-component asphalt modifies the rheology of the bitumen comprises at least one of i) a wax component ymprende at least one of i) a wax component and ii) a resin component, formulating the paqu ii) a resin component, formulating p aquete additive in a free-flowing solid powder, ete additive in a free-flowing solid powder, pe...

L'invention concerne, de maniere generale, un ensemble d'additifs destine a des formulati... more L'invention concerne, de maniere generale, un ensemble d'additifs destine a des formulations d'asphalte melangees a chaud destinees a la chaussee des surfaces routieres, cet ensemble d'additifs comprend a) un composant tensioactif, et b) un composant modifiant la rheologie de l'asphalte, ce composant comprenant au moins i) un composant de cire et ii) un composant de resine. L'invention concerne egalement un asphalte melange a chaud a compaction amelioree a des temperatures inferieures, et une chaussee fabriquee a partir de cet asphalte melange a chaud.

Tetrahedron, 1988

The conjugate addition of phenylmagnesium bromide to benzalacetomesitylene (1) was studied. The o... more The conjugate addition of phenylmagnesium bromide to benzalacetomesitylene (1) was studied. The only product resulting from 1,4-addition was Kohleis ketone (4) in 84 f 1% yield based on (1) by isolation and analysis. The byproducts from 4 were formed mainly by oxidation of the 2 enol of 4 to the a-ketohydroperoxide (6) during the hydrolysis and workup of the product followed by subsequent decomposition of 6 to diphenylethanal and a trace of 2,4,6+rimethylphenol. The other byproducts which were formed during the preparation of phenyl~gn~ium bromide are biphenyl, and trace amounts of phenol and 1-phenyl"l-ethanol. No trace of the previously reported3 a-bromoketone (5) was found under these conditions. The E enol was prepared by the enolization reaction of Kohieis ketone (4) with ~~ylmagnesium iodide followed by hydrolysis. The E enol appeared at a retention time of 3.6 compared with that of the 2 enol at 4.1 on the HPLC chromatograms. The relative rates of oxidation of the enofs as determined by following the disappearance the respective HPLC peaks were approximately 7: 1 for Z:E respectively. An explanation is presented for the faster oxidation of the 2 enol.

Acta Crystallographica Section E Structure Reports Online, 2004