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Topic: Olefin


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In the News (Fri 24 Oct 14)

  
  Sulfurized olefin process - Patent 4563302
A sulfurized olefin of claim 10 wherein said monoolefin is a branched chain monoolefin having 4-6 carbon atoms.
4,204,969, an effective sulfurized olefin is made by reacting sulfur monochloride with an olefin in the presence of a lower alkanol promoter to obtain an adduct which is reacted with sodium sulfide and sulfur in aqueous alkanol.
According to the present invention, a sulfurized olefin having improved solubility especially in.alpha.-olefin oligomer lubricating oil is made by reacting a monoolefin with S.sub.2 Cl.sub.2 or SCl.sub.2 to obtain an adduct which is reacted with sodium sulfide, sulfur, alkyl mercaptan and optionally sodium hydrosulfide in an aqueous alcohol reaction medium.
www.freepatentsonline.com /4563302.html   (3383 words)

  
 Olefin block copolymer, viscosity index improver for lubricating oils and lubricating oil composition - Patent 7022766
The polymer block (iii) may be composed of a polymer of ethylene and one olefin selected from α-olefins having 3 to 20 carbon atoms, or be composed of a random copolymer of ethylene and at least two olefins selected from α-olefins having 3 to 20 carbon atoms.
The olefin block copolymer of the invention is a block copolymer comprising a polymer block that is composed of an ethylene/α-olefin copolymer having a relatively low ethylene content and a polymer block that is composed of an ethylene/α-olefin copolymer having a relatively high ethylene content.
The olefin block copolymer of the invention, as is described later, is obtained by first copolymerizing ethylene and an α-olefin to prepare a polymer block, and copolymerizing ethylene and an α-olefin in the presence of the polymer block to prepare a polymer block that is different from the above polymer block.
www.freepatentsonline.com /7022766.html   (7352 words)

  
 Textile Reference Manual: Olefin/Polyethylene: A Fiber That Has Not Yet Reached Its Prime?
Olefin is produced in much the same way as polyester and nylon.
Texture: Olefin tends to have a waxy hand; however, the fibers can be modified to have a more attractive hand for apparel and home furnishings uses.
Olefin is stain resistant and is not affected by most chemicals; consequently, it is not easily soiled or stained.
www.costumegallery.com /Textiles/olefin.htm   (895 words)

  
 Eldridge Research Group--Research   (Site not responding. Last check: 2007-10-09)
The separation of olefins and paraffins is of primary importance in the chemical process industry due to the high demand for polymers and other specialty chemicals derived from mono-olefins such as ethylene.
Once the olefin is complexed with the metal, the solution can be heated to moderate temperatures to desorb the olefin, and the regenerated metal solution can be recycled.
The olefin rich liquid exits near the bottom of the column and passes through a valve, which lowers the pressure to near atmospheric before the solvent enters the regeneration column.
www.che.utexas.edu /eldridge-group/o_p/olefin_paraffin.htm   (793 words)

  
 C&EN: COVER STORY - OLEFIN METATHESIS: THE EARLY DAYS
Olefin metathesis was first observed in the 1950s by industrial chemists.
One carbon of the double bond of one olefin, along with everything attached to it, exchanges place with one carbon of the double bond of the other olefin, along with everything attached to it.
In an attempt to explain olefin metathesis, Grubbs--who by then had moved to Michigan State University, East Lansing--proposed that the redistribution of groups around the double bonds was due to a rearranging metallacyclopentane intermediate [J. Am.
pubs.acs.org /cen/coverstory/8051/8051olefin2.html   (3584 words)

  
 Fabric Properties and Distinctions Olefin
Olefin, in its basic form, is made into packaging materials.
Olefin fabrics should be air dried or dried at low temperatures.
Olefin, because it is easily molded, is now also being used for appliances and automobiles.
www.fabrics.net /amyolefin.asp   (1306 words)

  
 Olefin challenge
So if oil is tracked onto an olefin carpet from the garage, street or anyplace that has high oil content, you have a tough job to contend with.
It's a mystery why carpet salespeople tell customers they should put that olefin Berber in the kitchen - the kitchen that is not only going to have cooking oils permeating the air, but also will have lots of oily soils tracked in from the attached garage.
Some good places to put olefin carpet: A room where water is tracked in, around a swimming pool, a room where the kids love to spill Kool Aid, laundry rooms, etc. - all because olefin is resistant to water and chemicals.
www.cleanprosonline.com /Olefin_challenge.html   (533 words)

  
 Carpet.org - Types of Fiber
Olefin (polypropylene) is the next-best seller after nylon (about 80% of commercial carpet).
However, olefin can be easy to crush depending on the pile.
Olefin carpets are the most inexpensive fiber ranging from $7.50 per square yard to $40 per square yard for Berbers.
www.carpet.org /types_of_fiber.htm   (456 words)

  
 C&EN: COVER STORY - OLEFIN METATHESIS: BIG DEAL REACTION
The power of olefin metathesis is that it transforms the carbon-carbon double bond, a functional group that is unreactive toward many reagents that react with many other functional groups.
Olefin metathesis is "marvelous in the hands of the synthetic chemist," Nicolaou says.
The buzz of olefin metathesis is heard not only in research labs among chemists applying the reaction to complex syntheses.
pubs.acs.org /cen/coverstory/8051/8051olefin.html   (2413 words)

  
 Hydration of light Olefins : Isopropyl alcohol, s-butyl alcohol   (Site not responding. Last check: 2007-10-09)
Light branched alcohols are produced by the addition of olefin and water under an acid catalyst.
Olefins are hydrated to alcohols by a two stage process.
Olefins are first esterified with concentrated sulfuric acid to alkyl sulfates which are then subsequently hydrolyzed.
www.rohmhaas.com /ionexchange/IP/olefin.htm   (337 words)

  
 Olefin Carpet
Olefin has the lowest melting temperature of all fibers.
It is important to note some of the advantages and disadvantages of olefin.
Thus, olefin's attractiveness is often short lived unless the faceyarn density is high enough to resist crushing.
www.carpetinspector.com /olefin_carpet.htm   (316 words)

  
 Acrylic
Olefin tends to have a waxy hand; however, the fibers can be modified to have a more attractive hand for apparel and home furnishings uses.
Sunlight – Olefin is affected by sunlight; however, stabilizers are added during processing to correct this problem.
Eventhough olefin is comfortable to wear, it has a low melting point.
www.costumes.org /ADVICE/TEXTILES/olefin.htm   (874 words)

  
 Carpet Fibers - An unbiased review of carpet fibers.
Olefin was originally favored for outdoor carpeting and basements due to its resistance to moisture, mildew, water damage, staining, pilling, shedding and static—all for lower cost than nylon.
Olefin would not work well in a busy airport or school environment, but will perform well in a busy family room.
These constructions typically fail with any fiber system, but olefin is especially susceptible to pile crush in these constructions.
www.carpetbuyershandbook.com /pile_fibers.htm   (2495 words)

  
 Olefin
After determining if a Berber is an olefin Berber (click here for fiber identification information), you might consider using less moisture in your cleaning process (perhaps one of the various low moisture cleaning methods).
Olefin has weak resiliency and is a weaker fiber compared to nylon, and will matt and flatten down in traffic lanes in a short period of time.
Although fluorochemicals may be added to olefin at the mill, stain resistent acid dye blockers are not used.
www.cleanprosonline.com /Olefin.html   (960 words)

  
 Olefin Graft
Olefin graft polymers were developed by grafting an amorphous functional acrylic polymer section onto a crystalline olefin backbone.
This acrylate grafted olefin polymer is designed specifically to increase the efficacy of UV absorbers.
Olefin graft multi-functional polymers are designed to accentuate hair care formulations.
www.interpolymer.com /contentmgr/showdetails.php/id/197   (697 words)

  
 Olefin metathesis - Wikipedia, the free encyclopedia
Olefin metathesis or transalkylidenation (in some literature, a disproportionation) is an organic reaction which involves redistribution of olefinic (alkene) bonds.
Since its discovery, olefin metathesis has gained widespread use in research and industry for making products ranging from medicines and polymers to enhanced fuels.
Olefin metathesis was first used in petroleum reformation for the synthesis of higher olefins from the products (α-olefins) from the Shell higher olefin process (SHOP) under high pressure and high temperatures.
en.wikipedia.org /wiki/Olefin_metathesis   (589 words)

  
 Hammocks, Sunbrella, olefin quilted fabric
Olefin is a lightweight fiber with special UV inhibitors for a long life under the sun.
As with all Twin Oaks hammocks, the white oak spreader bars are hand finished with natural linseed oil, and the olefin harnesses are hand made by skilled craftsmen.
Olefin available in 6 designs, stripe or solid on one side, solid color on the other.
www.ticknthistle.com /hammocks/quilted_sunbrella_hammock.htm   (551 words)

  
 Chemeisters Official Site - Olefin Cleaning Crisis Update
affects many olefin carpets that comes from pollutants in the air.
residue is bonding with the soft polymer construction of olefin carpet and
the third reason is that in the carpet showroom the olefin is softer and
www.chemeistersusa.com /Olefinproblems.html   (997 words)

  
 Olefin Fiber   (Site not responding. Last check: 2007-10-09)
Olefin fibers are characterized by their resistance to moisture and chemicals.
Of the two, polypropylene is the more favored for general textile applications because of its higher melting point; and the use of polypropylene has progressed rapidly since its introduction.
A range of characteristics can be imparted to olefin fibers with additives, variations in the polymer, and by use of different process conditions.
www.filamentfiber.com /poly.html   (303 words)

  
 Olefin
Olefin is commonly used in carpeting, upholstery, wall coverings, and sports apparel.
Olefin is not affected by alkalis or acids, but some solvents can dissolve it.
It deteriorates in the sun and is very sensitive to heat.
home.gwu.edu /~res/pages/olefin.html   (72 words)

  
 Rope Hammocks - Double Olefin
The Olefin Rope Hammocks are a traditional hammock with a synthetic braid.
Olefin makes an excellent choice for hammocks because the olefin dries very quickly and is resistant to breakdown due to chemicals, perspiration, mildew and weather.
The Double Olefin Rope Hammocks are 4-1/2ft wide and 7ft long which is double bed size.
www.backyardcity.com /hammocks/BHC-Double-Olefin-Hammocks.htm   (333 words)

  
 Lyondell Chemical Company - Licensed Technologies   (Site not responding. Last check: 2007-10-09)
Water vapor and olefin are combined at elevated pressure and temperature and are passed over the surface of a catalyst support impregnated with phosphoric acid.
Ethers corresponding to the olefin are formed as by-products.
The process is based on a fluidized catalytic reactor which can be easily integrated into an existing olefins plant and has flexibility to process many streams which may be available from the olefins plant and /or refinery.
www.lyondell.com /html/products/Licensing/olefins.shtml   (644 words)

  
 Alkene - Wikipedia, the free encyclopedia
In organic chemistry, an alkene, olefin, or olefine is an unsaturated chemical compound containing at least one carbon-to-carbon double bond.
Alkenes are also called olefins (an archaic synonym, widely used in the petrochemical industry) or vinyl compounds.
Reaction with a phenyl sulfone in the Julia olefination
en.wikipedia.org /wiki/Olefin   (1338 words)

  
 Ethylene alpha-olefin polymer substituted mono- and dicarboxylic acid dispersant additives (US5433757)   (Site not responding. Last check: 2007-10-09)
Stabilized imide graft of ethylene copolymeric additives for lubricants
Fatty alkyl succinate ester and succinimide modified copolymers of ethylene and an alpha olefin
Olefin polymer viscosity index improver additive useful in oil compositions
www.delphion.com /details?pn=US05433757__   (818 words)

  
 Olefin Rope hammocks
Our Olefin Rope Hammock is woven by hand using traditional knotless weaving techniques, and crafted with hundreds of feet of soft, long-lasting, body-hugging synthetic olefin rope.
All Olefin Rope Hammocks have a weight capacity of 450 lbs.
Olefin is a lightweight rope with special UV inhibitors for a long life under the sun.
www.ticknthistle.com /hammocks/olefinhammock.htm   (364 words)

  
 The Organometallic HyperTextBook: Olefin Metathesis
The olefin metathesis reaction can be thought of as a reaction in which all the carbon-carbon double bonds in an olefin (alkene) are cut and then rearranged in a statistical fashion:
The commonly accepted mechanism for the olefin metathesis reaction was proposed by Chauvin and involves a [2+2] cycloaddition reaction between a transition metal alkylidene complex and the olefin to form an intermediate metallacyclobutane.
The mechanism of this reaction is identical to that of the olefin metathesis reaction except that the final step is not reversible.
www.ilpi.com /organomet/olmetathesis.html   (939 words)

  
 Dow Introduces INFUSE™ Olefin Block Copolymers
Through this approach, a leading edge catalyst system was developed that allows for control of the molecular architecture required to produce the olefin-block structure in a continuous process.
The block structure is the key to delivering the outstanding properties of the INFUSE olefin block copolymer family.
These new olefin elastomers will enable a wide range of new application opportunities for converters and manufacturers of flexible goods and products.
news.dow.com /prodbus/2006/20060620a.htm   (467 words)

  
 Bane-Clene Olefin Pre-Conditioner / Prespray
In fact, olefin (sometimes called polypropylene) is so oily itself that it is the only carpet fiber that floats in water!
Bane-Clene Olefin Pre-Conditioner, a super-concentrated triple strength formulation of uniquely balanced nonionic and anionic surfactants, is formulated especially to emulsify heavily compacted oil and grease, especially in carpet traffic lanes and other hard to clean areas - particularly on olefin and on berber carpet.
To add this item to your current order, select the unit size you would like (if there is more than one) from the checkbox above, and place the number of units you would like in the adjacent box.
www.baneclene.com /catalog/olefin.html   (268 words)

  
 Alkyl olefin aromatic polymers - toxicity, ecologicial toxicity and regulatory information
Chemical Identification and Use for Alkyl olefin aromatic polymers
There may be other diseases and chemicals that have similar symptoms.
Sorry, no water quality standards or criteria have been established for this chemical by the U.S. or Canadian governments; however, there may be criteria established for related chemicals.
www.pesticideinfo.org /Detail_Chemical.jsp?Rec_Id=PC35236   (669 words)

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