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Topic: Norbornene

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	INEOS Oxide - Products - Ethylidene Norbornene
		The use of ENB is derived from the norbornene double bond which copolymerises with ethylene and propylene to produce an ethylene-propylene-terpolymer that contains the ethylidene double bond as residual unsaturation.
		Novel norbornenes, pioneered by INEOS Oxide, are also being used in a host of emerging technologies including high performance cyclic olefin copolymers for electronic and optical applications, in new types of EPDM rubbers, in agrochemicals and in pharmaceuticals.
		Laboratory and small pilot plant reaction/distillation facilities are available for the manufacture of novel bespoke norbornenes, based on the reaction of dicyclopentadiene with a host of unsaturated compounds.
	www.ineosoxide.com /norbornene.htm (325 words)

	Norbornene - Wikipedia, the free encyclopedia
		Norbornene or norbornylene or norcamphene is a bridged cyclic hydrocarbon.
		Norbornenes are important monomers in ring-opening metathesis polymerizations (ROMP) with for instance the Grubbs catalyst.
		Ethylidene norbornene is a related monomer derived from cyclopentadiene and butadiene.
	en.wikipedia.org /wiki/Norbornene (188 words)

	[No title] (Site not responding. Last check: 2007-10-27)
		6,165, 890 a sacrificial norbornene polymer is used between the metal lines of a semiconductor device and then the device is heated to decompose and vaporize said polymer leaving an air gap between said metal lines.
		The semiconductor structure of Claim 8, wherein the sacrificial polymer is a copolymer comprising from 85 to 55 mole percent 5-ethylidene-2- norbornene and from 15 to 45 mole percent vinylbenzocyclobutene or a vinylbenzocyclobutene derivative based on total moles of incorporated monomers in the polymer.
		The semiconductor structure of Claim 8, wherein the sacrificial polymer is a copolymer consisting essentially of from 99 to 40 mole percent 5-ethylidene-2-norbornene and from 1 to 60 mole percent vinylbenzocyclobutene or a vinylbenzocyclobutene derivative based on total moles of incorporated monomers in the polymer.
	www.wipo.int /cgi-pct/guest/getbykey5?KEY=04/73018.040826&ELEMENT_SET=DECL (4574 words)

	Marko Zupan, Primoz Skulj and Stojan Stavber (Site not responding. Last check: 2007-10-27)
		It has already been demonstrated that bicyclo[2,2,1]heptene (norbornene) is one of the most versatile model olefins in studies of the role of reagent structure of electron acceptor type E–L reagents on the course of the addition reaction.
		It is known that the relative rates of the norbornene / cyclohexene pair are much more dependent on the nature of the reagent, and therefore on the type of the intermediate (three-centered, four-centered, etc.) than in the case of the cyclopentene / cyclohexene pair.
		N-bromosuccinimide (crystallized from acetonitrile), norbornene (sublimed), cyclopentene and cyclohexene (distilled) and the solvents (distilled) were obtained from commercial sources.
	www.arkat-usa.org /ark/journal/2001/I05_Tisler/164/MT-164B.asp (2482 words)

	Norbornene – No longer a rare chemical
		The bridged ring puts extra strain on the double bond, making it highly reactive.Therefore, many opportunities are given to modify the basic norbornene molecule or to incorporate it into bigger molecules, such as COC or other polymers.
		Norbornene is made by the Diels-Alder reaction of cyclopentadiene and ethylene, two commonly available hydrocarbons.
		It has various uses in general organic synthesis, and because of its combination of strong odor and low toxicity, it is also used as an odorant.
	www.topas.com /products-norbornene (235 words)

	Process for producing norbornene derivative having organosilyl group - Patent 6777570
		The present invention relates to a process for producing a norbornene derivative having an organosilyl group suitable as a synthetic intermediate for pesticides and medicaments and as a monomer for use in polyolefin polymers, particularly polyolefin polymers having a good adhesiveness with metals or insulating inorganic materials.
		In the invention, an objective norbornene derivative having an organosilyl group is produced by reacting a norbornene compound having a halosilyl group with a specific Grignard agent.
		The norbornene compound having a halosilyl group to be used as a starting material for the invention is represented by the above general formula (1).
	www.freepatentsonline.com /6777570.html (3024 words)

	Norbornene
		The bridged ring puts extra strain on the double bond, making it highly reactive, giving many opportunities to modify the basic norbornene molecule or to incorporate it into bigger molecules, such as COC or other polymers.
		The methods used may include ring-opening metathesis polymerization (ROMP), copolymerization, radical or cationic polymerization, and vinyl or addition polymerization.
		As the largest capacity supplier of this useful intermediate chemical, Ticona’s Oberhausen plant has an annual capacity of about 21,000 tons/year of high purity norbornene, assuring availability of a consistent quality supply at acceptable economics.
	www.ticona.com /index/products/index/products/coc/norbornene.htm (231 words)

	Copolymerization of Ethene with Norbornene Derivatives Using Neutral Nickel Catalysts (Site not responding. Last check: 2007-10-27)
		The copolymerization of ethene with norbornene derivatives, as well as their terpolymerization with 1-alkenes, using a series of neutral, square-planar nickel complexes containing anionic P~O chelates is described.
		With norbornene derivatives bearing oxygen functionalities, the level of incorporation is lower, as are the reaction rates and polymer molecular weights.
		In the case of terpolymerization of ethene and norbornene with 1-alkenes, the polymer molecular weights tend to be low because of slower monomer insertion and additional chain-transfer pathways that are available following 1-alkene insertion.
	pubs.acs.org /cgi-bin/jtext?mamobx/35/i24/abs/ma020933a (174 words)

	Norbornene from Dicyclopentandiene and Ethylene
		Norbornene, or bicyclo[2.2.1]-2-heptene, has been used to make polymers in a number of elastomer applications in the past.
		In recent commercial applications, norbornene has been used to make cyclic olefin copolymers—a new class of engineering polymers with a unique balance of properties, including low density; high transparency; and resistance to heat, water, and chemicals.
		Norbornene is produced from the reaction of ethylene and cyclopentadiene (CPD) via the Diels-Alder condensation process.
	www.sriconsulting.com /PEP/Reports/Phase_95/RW95-1-5/RW95-1-5.html (281 words)

	Toxicologic Review of Selected Chemicals (Site not responding. Last check: 2007-10-27)
		The Agency proposed a ceiling limit of 5 ppm, based on the ACGIH recommendation, and is establishing this limit in the final rule.
		Ethylidene norbornene is a colorless liquid which reacts with oxygen.
		The Agency finds that this limit is necessary to minimize the risk of irritation that has been documented to occur in occupational exposures to concentrations as low as 6 ppm for 30-minute periods.
	www.bu.edu /ehs/ih/tox/16219-75.htm (356 words)

	Novel, Efficient, Palladium-Based System for the Polymerization of Norbornene Derivatives: Scope and Mechanism
		For several norbornene derivatives, the molecular weight of the polymer was found to decrease with increasing amounts of added 2-propanol.
		The polymerization rate was found to decrease dramatically for norbornene derivatives with pendant oxygen functionalities.
		The effect of coordinating solvents and the uptake of endo vs exo isomers for functionalized norbornenes was tested.
	pubs.acs.org /cgi-bin/jtext?orgnd7/20/i13/abs/om010232m (330 words)

	Asymmetric hydroarylation of hetero-atom containing norbornene derivatives and enantioselective synthesis of analogs of ... (Site not responding. Last check: 2007-10-27)
		The reductive Heck-type hydroarylation reactions of hetero-atom containing norbornene derivatives catalyzed by palladium complexes of chiral quinolinyl-oxazolines were examined and moderate to good chiral inductions and chemical yields were achieved.
		It is of interest to study the application of this type of dinitrogen ligands in the enantioselective synthesis of epibatidine and its analogs.
		Moreover, many norbornene derivatives containing nitrogen or oxygen atoms were reported to have important biological activities.
	www.arkat-usa.org /ark/journal/2003/I02_Huang/ZH-555D/555D.asp (1535 words)

	TMC - Kaminsky - Kiesewetter
		-diimines was tested in a screening-like procedure in order to identify catalysts with an interesting performance concerning incorporation of norbornene, microstructure, and molar mass.
		-diimine catalysts concerning the copolymerization of ethene and norbornene.
		Additional focus lies on the synthesis of new catalysts and on the copolymerization of ethene and functional substituted norbornene derivatives.
	www.chemie.uni-hamburg.de /tmc/kaminsky/html/kiesewetter1.html (128 words)

	Roof sheeting - US Patent 6543199 (Site not responding. Last check: 2007-10-27)
		Ethylene-propylene-ethylidene norbornene terpolymers perform well in is sheeting applications but are deficient in tack and mill processability because their tangent delta is too high.
		The preferred embodiment of the elastomer employed in the practice of the present invention is an ethylene, propylene, ethylidene norbornene, and dicyclopentadiene tetrapolymer having excellent uncured tack properties and improved mill processability.
		Desirable concentrations of ethylidene norbornene (ENB) are 1 to 10 weight percent and, preferably, 2 to 4 weight percent.
	www.patentstorm.us /patents/6543199.html (5744 words)

	Packaging Gateway - Topas Advanced Polymers - Cyclic Olefin Copolymers and Norbornene
		Topas Advanced Polymers is the world’s largest norbornene supplier with an annual capacity of about 21,000t/yr.
		Norbornene is a reactive bicyclic olefin that can be incorporated it into larger molecules.
		It is made by synthesizing norbornene from dicyclopentadiene and ethylene, and then copolymerizing norbornene with ethylene with a metallocene catalyst.
	www.packaging-technology.com /contractors/materials/topas (517 words)

	ETD-db: ETD database (Site not responding. Last check: 2007-10-27)
		Measurement and correlation of the solubility of ethylene in toluene, norbornene, and COC mixtures
		In the producing process, attaching of ethylene group in COC is affected by the solubility of ethylene in toluene and norbornene mixtures.
		In this study, the solubility of ethylene at various temperatures (323.15 K-423.15 K), pressures (5bar-25bar), concentration of norbornene (0-85wt%), and concentration of COC (0-40wt%) in toluene were measured by a pressure decaying method.
	thesis.lib.ncu.edu.tw /ETD-db/ETD-search/view_etd?URN=89321010 (333 words)

	Ethylene-Norbornene Copolymerizations Via Silica-Immobilized Ti Cgc-Inspired Polymerization Catalysts (Site not responding. Last check: 2007-10-27)
		The copolymerization of ethylene and norbornene has seen a great deal of recent interest.
		By using a silica supported catalyst for the copolymerization of norbornene with ethylene, the polymer products could be tailored to better suit industrial needs.
		Reported here is the first use of a silica-tethered catalyst for the copolymerization of norbornenes with ethylene.
	aiche.confex.com /aiche/2005/techprogram/P14648.HTM (333 words)

	Content (Site not responding. Last check: 2007-10-27)
		A model study with four norbornene derivatives with different groups connecting a functional unit to the norbornene reveals that those so called anchor groups influence the polymerisation rate constants of ROM polymerisations.
		The observed effects are explained by different tendencies of the anchor groups to coordinate to the ruthenium centre during the resting state of the propagation.
		This approach has been chosen to guarantee a similar steric demand of all monomers under investigation without the need for separation of stereoisomers or utilization of diasteroselective reaction pathways.
	www.ictos.tugraz.at /research/initiatoren4.html (385 words)

	The synthesis and ROMP of heterocyclic monomers (Site not responding. Last check: 2007-10-27)
		A large number of norbornene derivatives have been studied in this way, but at the start of our work no functionalised-homochiral norbornene monomers had been investigated.
		Interestingly, attempts to extend this chemistry to the exo-isomers of compounds (10) and (11) failed at the first step, as dimers of structure (12) were the only isolated products no matter how large an excess of diamine was used, and independent of the chain length of the diamine.
		A series of monomers containing a norbornene unit attached to either a biologically active peptide, or a nucleic acid base have been prepared.
	www.ch.ic.ac.uk /ectoc/echet96/papers/115 (787 words)

	Abs Mike1 (Site not responding. Last check: 2007-10-27)
		Both monomeric and oligomeric norbornene ester- and norbornene silylether-type selectors showed good enantioresolution for dansylated (DNS-) amino acids using concentrations of the chiral selector of up to 4 % (w/v).
		Moreover, norbornene silylether-type selectors were found to be more efficient than norbornene ester-type selectors.
		Finally, oligomeric selectors were found to possess superior or at least comparable enantioselectivity in the separation of DNS-amino acids compared to the parent monomers.
	info.uibk.ac.at /c/c7/c725/macromol/buchmeiser/publikationen/abstracts/abs-mk31.html (201 words)

	Title page for ETD 600 (Site not responding. Last check: 2007-10-27)
		From the reactions with vinyl bromide, stable chloro-bridged dicationic Pd complex was isolated and characterized.
		The insertion of norbornene, endo and exo-5-ethylester-2-norbornene, and endo-5-methylacetate-2-norbornene into the palladium-methyl bond of Palladium(1,5-cyclooctadiene)(methyl)(chloride) was examined.
		Similar rates were found for all the norbornene derivatives, with the product in every case being derived from insertion through the exo face.
	etda.libraries.psu.edu /theses/approved/PSUonlyIndex/ETD-600 (472 words)

	Norbornene sulfonamide polymers
		The development is direсted to polymers enclosing a repeating element derived frоm a norbornene sulfonamide.
		These might be adding polymers whiсh comprise copoIymers with single оr extra comonomers suсh as norbornene, ethyIene, an acryIate оr suIfur dioxide оr carbon monoxide.
		The norbornene sulfonamides саn as well form ROMP polymers utilizing established metathesis cataIysts.
	www.patentalert.com /docs/000/z00039119.shtml (88 words)

	A Photodimerisation Route to Space-Separated Bis-Heterocycles (Site not responding. Last check: 2007-10-27)
		The observed exo-stereoselectivity is not surprising because almost all of these coupling methods utiltise norbornene-fused BLOCKS as one of the cycloaddends and from theoretical and experimental reports, it is known that norbornene shows exo-stereoselectivity in most reactions, particulary cycloadditions.
		It was found that fused norbornene, 7-oxanorbornene and benzonorbornadienes can act as one building BLOCK (A-BLOCK) and fused cyclobutene epoxide as the other (B-BLOCK).
		Being a two-step process, this coupling technique allows construction of homo- (if the same fused norbornene is coupled) or hetero-coupled products (if different fused norbornenes used).
	www.ch.ic.ac.uk /ectoc/echet98/pub/075 (4369 words)

	R-MC Academics
		Recently, I have also become interested in using analytical techniques such as NMR to to determine microstructures of various polymeric materials.
		“Copolymerization of Functionalized Norbornenes and the Comparison of Reactivity Ratios using Various Palladium Catalysts”, G.S. Long, C.A. Andes, A. Hennis Marchetti, and A. Sen. 224th ACS National Meeting, Boston, MA, August 2002.
		“A Study of the Uptake of endo vs. exo Norbornenes in Insertion Polymerization” A.D. Hennis and A. Sen. 220th annual ACS National Meeting, Washington, DC; August 2000.
	www.rmc.edu /directory/academics/chemistry/april.asp (1127 words)

	Close-Up - Materials - March 2000 (Site not responding. Last check: 2007-10-27)
		There is a growing family of polyolefins that are nothing like the polyethylenes and polypropylenes familiar to most processors.
		Cyclic olefin homopolymers and copolymers are engineering thermoplastics derived from the ring-shaped norbornene molecule, which is made from dicyclopentadiene (DCPD) and ethylene.
		Zeonex norbornene homopolymer from Zeon Chemicals is a high-clarity, heat-resistant material that is molded into optical components like these laser-printer parts.
	www.plasticstechnology.com /articles/200003cu1.html (1250 words)

	[No title] (Site not responding. Last check: 2007-10-27)
		aliphatic hydrocarbon group as a substituent and norbornene ester having an acid-labile group as a substituent, and a fourth monomer selected from the group consisting of (meth)acrylic acid, (meth)acrylate having C
		alicyclic hydrocarbon group as a substituent and an acid-labile group pendent a the norbornene ester, and a fourth monomer which is (meth)acrylate having a C
		aliphatic alcohol with a carboxylic anhydride group pendent thereto as a substituent, a second monomer which is maleic anhydride, a third monomer which is norbornene ester having an acid-labile group as a substituent, and a fourth monomer which is norbornene ester having a C
	www.uspto.gov /web/patents/patog/week20/OG/html/1294-3/US06893793-20050517.html (593 words)

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