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Topic: Synthetic polymer


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  Synthetic polymer composition having enhanced antistatic properties - Patent 4024205
The synthetic polymers prepared in accordance with the subject invention may be in the form of fibers, films, filaments, molded objects and coatings.
Although antistatic agents are efficacious with the polymers hereinbefore defined, owing to the peculiar nature of the synthetic polyester polymers, it is somewhat disadvantageous to introduce into a polyester melt any remaining unreacted hydroxyl groups.
Thus, to render the antistatic agents particularly useful with polyester polymers, and to minimize interaction with the polyester, it is contemplated that the polymeric antistatic agent composition hereof be subsequently reacted with an aromatic carboxylic acid or an ester thereof.
www.freepatentsonline.com /4024205.html   (2882 words)

  
 MALDI of Synthetic Polymers
The capability of this technique in the analysis of synthetic polymers had lagged behind, due to the unique chemical, physical, and mechanical properties of these materials.
The solubility of matrix and polymers in the same solvent is critical for polymer analysis.
Polymers of group 4 are soluble in solvents that are not compatible with matrix materials.
www.chemistry.wustl.edu /~msf/damon/synthetic_polymers.html   (916 words)

  
 Patent 7,067,580
Natural or synthetic polymer may be softened or liquified by being (1) heated, (2) dissolved or (3) suspended in a plasticizer or solvent.
These polymers in turn were softened or liquified by (i) heat, (ii) solution in a solvent or (iii) suspension in a plasticizer, using conventional methods of softening and liquification already known in the art of polymer handling and processing.
The polymer and endotherm combinations were then mixed thoroughly to insure the distribution, dispersal, and suspension of the endotherms in the polymers's interstitial spaces; said spaces being formed during the softening of the polymers' long chains of mostly linear molecules.
www.pharmcast.com /Patents100/Yr2006/June2006/062706/7067580_Composite062706.htm   (1143 words)

  
 Class Definition for Class 521 - SYNTHETIC RESINS OR NATURAL RUBBERS -- PART OF THE CLASS 520 SERIES
A polyurea is defined to be a polymer containing the moiety, -NN-, and is generally prepared from either a diamine and a dilsocyanate, a diamine and urea, a diamine and phosgene or a bishaloformate and a diamine.
Solid polymer as used throughout this schedule does not exclude polymers which would be solid except that under the conditions of use their physical state has been changed to satisfy the process conditions required (e.g., molten, dissolved).
Furthermore, polymers which are to be after-treated and which already have been exposed to a preliminary after-treatment step, (e.g., halogenated polymer, alkylated polymer, etc.) are classified on the basis of the unsaturated monomers or reactants used in the preparation of the polymer.
www.uspto.gov /go/classification/uspc521/defs521.htm   (5658 words)

  
 Biodegradable Polymers
Polymers are synthetic and natural macromolecules composed of smaller units called monomers.
Synthetic polymers were developed for durability and resistance to all forms of degradation.
Synthetic condensation polymers are generally biodegradable to different extents depending on chain coupling (ester > ether> amide > urethane), morphology (amorphous > crystalline), molecular weight (lower > higher), and hydrophilic is faster than hydrophobic.
www.denison.edu /chem/DCS/journal/_scottv1n1.html   (1758 words)

  
 Tissue with semi-synthetic cationic polymer - Patent 6911114
Semi-synthetic cationic polymer can also have a molecular weight range greater than that of typical synthetic cationic polymers of use in tissuemaking (which often have a range of about 20,000 to about 800,000 Daltons) but lower than that of the natural polymers from which they are derived.
The semi-synthetic cationic polymers of the present invention may also be added to the pulp slurry or other parts of the tissuemaking process, such that it is present in the tissue web before drying or before contact with surfaces from which the tissue web is to be adhered and released.
For example, a semi-synthetic cationic polymer may be added to a tissue web as a retention agent, and the same semi-synthetic cationic polymer or another semi-synthetic cationic polymer may further be added to a drying drum as a drum drying additive later in the manufacturing process.
www.freepatentsonline.com /6911114.html   (12248 words)

  
 Fundamentals of Polymers for Fiber Applications
A molecule used in producing a polymer is a “monomer” — mono is Greek for single, thus a monomer is a “single part”.
Synthetic polymer fibers can be made with regular structures that allow the chains to pack together tightly, a characteristic that gives filaments good strength.
This form of step-growth polymerization is used for the manufacture of two of the most important classes of polymers used for textile fibers, polyamide (commonly known as nylon), and polyester.
www.fibersource.com /f-tutor/poly.htm   (2001 words)

  
 Building manufacture and method using synthetic polymer structural elements and adhesive bonding - US Patent 5826389
The building or housing structure of claim 3 wherein said synthetic polymer material is selected from the group consisting of polyvinyl chloride and copolymers of polyvinyl chloride with other vinyl monomers.
The building or housing structure of claim 5 further comprising solid sheet roofing panels and soffit panels made of synthetic polymer materials which are attached to said top plates and rafters using a polymer adhesive to form a completed roof.
The method of claim 14 wherein said synthetic polymer material is selected from the group consisting of polyvinyl chloride and copolymers of polyvinyl chloride with other vinyl monomers.
www.patentstorm.us /patents/5826389-claims.html   (674 words)

  
 History of Polymer & Plastic - Teacher Background Info   (Site not responding. Last check: )
Transparent polymers are those that you can see through, translucent are those that you cannot see through but allow light to pass through, and opaque polymers are those that you can neither see through nor allow light to pass through.
Polymers have many inherent properties that can be enhanced by a wide range of additives to broaden their use and application.
Synthetic fiber clothing is a common example of static charge building up on material, causing the fabric to cling to other materials.
www.teachingplastics.org /hands_on_plastics/intro_to_plastics/teachers.html   (4969 words)

  
 Characterizing Synthetic Polymers by MALDI MS
This last class includes polymers soluble in solvents that are not compatible with matrix materials, and these are the most difficult to analyze by MALDI because a homogeneous mixture of matrix and analyte is not easily prepared.
Nonsoluble polymers are generally not analyzable by MALDI because a mixture of matrix/analyte cannot be created because of the lack of a common solvent.
The concept involves combining MALDI with chromatography: The intensity of the polymer present (the relative abundance of the polymer distribution) is determined by the refractive index response of GPC, and the mass of the eluant is then measured by a mass spectrometer.
pubs.acs.org /hotartcl/ac/98/jul/report.html   (3435 words)

  
 Synthetic polymer-based wrinkle fillers
However, developing a synthetic polymer suitable as a dermal filler presents a number of challenges: it should have a very low risk of allergic and immune reactions; it should not migrate outside the treated area; it should not be toxic and should be mechanically similar to natural skin matrix.
One approach to developing nontoxic synthetic polymers is to use natural nontoxic monomers.
Both of these polymers, but especially polyalkylimide are believed to integrate into the skin matrix (they get encapsulated by the body's own collagen) and, as a result, rarely migrate away from the treatment site.
www.smartskincare.com /treatments/fillers/synthetic_polymer_fillers.html   (1060 words)

  
 synthetic polymer
The National synthetic polymer of Quitlines, a synthetic polymer effort of CDC, the National Cancer Institute, synthetic polymer quitlines, and the Institute of Medicine (22).
In addition to the strength synthetic polymer evidence of effectiveness, the Task Force concluded the following: The Community Guide should be compared with recommendations in this report are based on these qualifying studies, all of which had good or fair execution.
an intervention might lead to synthetic polymer synthetic polymer that the intervention not be used, even if it is effective in synthetic polymer some outcomes.
hometown.aol.com /MaughamMrs1396/synthetic-polymer.html   (297 words)

  
 Cosmetics Unmasked Ingredients p- - PEG
Origin: A PEG (Poly-ethylene glycol) ingredient is a synthetic compound, often obtained by chemical modification of naturally occurring substances, that are widely used in cosmetics and toiletries for a wide variety of functions.
Origin: A synthetic polymer made from oxirane (ethylene oxide) and fatty acids obtained from tall oil, an oily by-product of wood pulp from the paper industry.
Origin: A synthetic polymer made from oxirane (ethylene oxide), glycerin and fatty acids obtained from tall oil, an oily by-product of wood pulp from the paper industry.
www.gina.antczak.btinternet.co.uk /CU/IP1.HTM   (6219 words)

  
 Polymer Manufacturers - B2B Manufacturers Directory Taiwan,China Polymer Manufacturers, Suppliers
The monomer molecules which in the polymer usually number from at least 100 to many thousands may or may not all be the same.
An addition polymer is one in which the molecular formula of the repeating structural unit is identical to that of the monomer, e.g., polyethylene and polystyrene.
Polymerization, the chemical process of forming polymers from their component monomers, is often a complex process that may be initiated or sustained by heat, pressure, or the presence of one or more catalysts.
www.trade-suppliers.com /chemical/Polymers.htm   (1676 words)

  
 Fiber Trademarks
CN (b) modacrylic - a manufactured fiber in which the fiber-forming substance is any long chain synthetic polymer composed of less than 85% but at least 35% by weight of acrylonitrile units.
Where not less than 92% of the hydroxyl groups are acetylated, the term triacetate may be used as a generic description of the fiber.
(k) spandex - a manufactured fiber in which the fiber-forming substance is a long-chain synthetic polymer comprised of at least 85% of a segmented polyurethane.
www.teonline.com /fiber-trademarks.html   (1223 words)

  
 Matrices - Synthetic Polymer inventions
Synthetic Polymer patent applications listed are from June 2005 to current and include Date, Patent Application Number, Patent Title, Patent Abstract summary and are linked to the corresponding patent application page.
A complex matrix is constituted by at least one biocompatible polymer of natural origin, cross linked and to which are grafted small chains of a molecular weight less than 50,000 Da with an amount of grafting of 10 to 40%, as well as a process for preparation of a biocompatible...
A hydrogel composition is generated in situ in the tumor by administering a polymer, such as a polysaccharide or a polyamino acid, with a therapeutic agent, such as a radionuclide or a...
www.freshpatents.com /x1424486000psbc.php   (11157 words)

  
 Method of preparing crosslinked biomaterial compositions for use in tissue augmentation - Patent # 5550187 - ...
The method of claim 5, wherein synthetic hydrophilic polymer is a polyethylene glycol that has been chemically derivatized to contain a functional group capable of forming a covalent bond with a primary amino group on a biocompatible polymermolecule.
The method of claim 12, wherein the synthetic hydrophilic polymer is a polyethylene glycol that has been chemically derivatized to contain a functional group capable of forming a covalent bond with a primary amino group on a biocompatiblepolymer molecule.
In a less preferred embodiment, the biocompatible polymer and the sterile, dry crosslinking agent are contained in separate barrels of a double-barreled syringe which has a chamber or compartment housing a means for mixing the polymer and, thecrosslinking agent in advance of the syringe orifice.
www.patentgenius.com /patent/5550187.html   (8576 words)

  
 Rules and Regulations Under the Textile Fiber Products Identification Act
A manufactured fiber in which the fiber-forming substance is a long chain synthetic polymer comprised of at least 85 percent of a segmented polyurethane.
A manufactured fiber in which the fiber-forming substance is any long chain synthetic polymer composed of at least 85 percent by weight of ethylene, propylene, or other olefin units, except amorphous (noncrystalline) polyolefins qualifying under paragraph (j)(1) of this section.
Where the fiber-forming substance is a cross-linked synthetic polymer, with low but significant crystallinity, composed of at least 95 percent by weight of ethylene and at least one other olefin unit, and the fiber is substantially elastic and heat resistant, the term lastol may be used as a generic description of the fiber.
www.ftc.gov /os/statutes/textile/rr-textl.htm   (6812 words)

  
 Full synthetic polymer blended compressor and vacuum pump oils from Anglo Designs
Some forward thinking companies though are now starting to appreciate the link between the two and by introducing a full synthetic polymer blended lubricant are starting to affect their operating costs in a beneficial manner.
Being a true 8000hr full synthetic polymer oil there are significant savings to be had by fewer oil changes which means environmental gains and lower servicing costs, companies claim this oil pays for itself quickly.
Full synthetic polymer blended compressor and vacuum pump oils are available from Anglo Designs.
www.ferret.com.au /articles/z1/view.asp?id=17283   (479 words)

  
 L&I: Stuffed Toys Regs
A manufactured fiber in which the fiber-forming substance is any long chain synthetic polymer composed of at least 85% by weight of an ester of a dihydric alcohol and terephthalic acid.
A manufactured fiber in which the fiber-forming substance is a long chain synthetic polymer comprised of at least 85% of a segmented polyurethane.
A manufactured fiber in which the fiber-forming substance is any long chain synthetic polymer composed of at least 50% by weight of vinyl alcohol units and in which the total of the vinyl alcohol units and any one or more of the various acetal units is at least 85% by weight of the fiber.
www.dli.state.pa.us /landi/CWP/view.asp?a=185&Q=164972   (2007 words)

  
 Mauritz - MALDI-TOF Mass Spectrometry
The matrix and polymer are mixed at a molecular level in an appropriate solvent with a ~104 molar excess of the matrix.
Synthetic water-soluble polymers have been shown to be capable of analysis using similar conditions to those of biopolymers.
MALDI studies have been shown to be applicable to polymers of a broad range of chemistry from water-soluble polymers such as poly(ethylene glycol) 12,13,17,18, poly(propylene glycol) 12, poly(styrene sulfonic acid) 14,19, and poly(acrylic acid) 14 to organic-soluble polymers such as poly(styrene) 11,12,17, and poly(butyl methacrylate) 16.
www.psrc.usm.edu /mauritz/maldi.html   (2520 words)

  
 Amazon.ca: Analytical Pyrolysis of Synthetic Organic Polymers: Books: Serban Moldoveanu   (Site not responding. Last check: )
Analytical Pyrolysis of Synthetic Organic Polymers is a follow-up to Analytical Pyrolysis of Natural Organic Polymers, which is volume 20 of the series.
The first part of the book has five chapters including an introduction, a discussion on physico-chemistry of thermal degradation of synthetic polymers and on instrumentation used in analytical pyrolysis, a chapter discussing what type of information can be obtained from analytical pyrolysis, and a chapter dedicated to the analysis and characterization of synthetic polymers.
Polymer chemistry is an important branch of science, and polymer analysis and characterization is a common subject in scientific literature. Read the first page
www.amazon.ca /Analytical-Pyrolysis-Synthetic-Organic-Polymers/dp/0444512926   (449 words)

  
 Unasylva - Vol. 1, No. 3 - The Position of Cellulose as a Fiber-Forming Polymer
From them the polymers are then built up by a process of polymerization, which unites the small basic units having molecular weights around one hundred by strong chemical bonds to form large molecules having molecular weights of several hundred thousands and, in most cases, possessing the character of a long flexible chain.
The molecular weight is also proportional to the length of the chain which each polymer molecule represents; the greater this length, the stronger, generally, the mutual cohesion between adjacent polymer molecules in the fiber and the higher the latter's tensile strength.
In the case of cellulose, we use a polymer that occurs in nature with a very high molecular weight and degrade it during the various steps of manufacturing into a mixture of larger and smaller molecules, which is then processed into fibers or films.
www.fao.org /docrep/x5341e/x5341e06.htm   (2283 words)

  
 CHEM 457 Synthetic Polymer Chemistry 4R
CHEM 457 Synthetic Polymer Chemistry 4R-0L-4C Pre: CHEM 252
The major focus is the organic chemistry of polymer synthesis and modification.
Also included in the curriculum is the design of polymer systems that meet certain performance criteria or have desirable physical properties.
www.rose-hulman.edu /chemistry/synthetic%20polymer%20chemistry.htm   (98 words)

  
 [No title]
In our lab, we are designing new MAP mimetic polymers for adhesion to soft and hard tissues and for prevention of biofouling on surfaces.
The polymers may be used as injectable liquids for surgical tissue adhesion or as components of mucoadhesive drug delivery systems.
Surprisingly, we have also found that MAP mimetic peptides can be used to anchor antifouling polymers onto biomedically relevant surfaces, rendering the surfaces resistant to cell, protein and microorganism (bacteria, alga) adsorption.
mse.snu.ac.kr /bbs/colloquium_view.htm?table=board5&idx=160&selected_year=2007   (257 words)

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