Specialty polymer

LDPE homopolymers in the 0.2—150 melt index or 100, 000 20,000 mPa s(= cP) viscosity range. Specialty polymers such as greases and waxes or highly cross-linked polymers are not included. 

Vinyl-2-PyrroHdinone. l-Vinyl-2-pyrroHdinone (VP) (l-ethenyl-2-pyrroHdinone, A/-vinyl-2-pyrroHdone, and V-Pyrol) is manufactured by ISP in the United States and by BASF in Germany by vinylation of 2-pyrroHdinone with acetylene. It forms the basis for a significant specialty polymer and copolymer industry and consumes the primary portion of aH 2-pyrroHdinone manufactured (see Vinyl polymers, n-vinyl monomers and polymers). 

The other isomer, 1,2-butadiene, a small by-product in 1,3-butadiene production, has no significant current commercial interests. However, there are a number of pubHcations and patents on its recovery and appHcations, particularly in the specialty polymer area (8,9) and as a gel inhibitor (10). 

TONE Polyols technical bulletin. Specialty Polymers and Composites Division, Union Carbide Corp., Stamford, Coim., 1986. 

Applications of Polymers. Uol 7, Specialty Polymers and Polymer Processing, Pergamon Press, New York, 1989. 

C. K. S. Pillai, C. Pavithran, A. R. R. Menon, V. S. Prasad, J. D. Sudha, V. G. Jayakumari, M. Brahmaku-mar, P. Anandan, and A. D. Damodaran, Specialty Polymers from Long Chain Hydrocarbon Phenols, Project Completion Report, Regional Research Laboratory, Trivandrum (1994). 

One major use of HF is in the manufacture of fluorinated hydrocarbons. Fluorinated ethylene is used for several specialty polymers. For example, the Teflon coating on nonstick cookware is made from polytetrafluoroethylene (PTFE). This polymer is made from tetrafluoroethylene. 

Considering all given factors, ROM polymerisation can now be identified as the polymerisation method of choice for the synthesis of highly defined, tailor-made specialty polymers. 

Ruthenium-NHC complexes exhibit activity in a very wide field of applications. Due to their unique ability to break and reassemble olefin bonds under reaction conditions very favourable to design simple processes, applications in nearly any chemical discipline can be foreseen. This field may span from manufacturing of specialty polymers and rabbers to pharmaceuticals, pharmaceutical intermediates, agrochemicals, fragrances, dyes, specialty chemicals for electronic applications or fine chemicals from natural feedstock and many more. Below are described Ru-NHC catalysed reactions applied from pilot to full commercial scale. 

Similarly, low volume chemicals are classified according to whether they are sold primarily on the basis of specification or performance. Specialties are generally formulations that are sold on the basis of their performance and their prices reflect their value rather than cost of production. Producers of specialty chemicals often provide extensive technical service to their customers. Examples of specialty chemicals include pharmaceuticals, pesticides, flavours and fragrances, specialty polymers, etc. Fine chemicals, on the other hand, are produced to customer specifications and are often intermediates or active ingredients for specialty chemicals, e.g. pharmaceutical and agrochemical intermediates and bulk actives. 

One of the ways to synthesize specialty polymers with certain desirable functional groups is by the polymerization of monomers with the desirable functional groups. However there are often a number of difficulties associated with polymerization of these... 

Shirakawa polyacetylene, 444 Siloxanes, polymerization, 239 Size exclusion chromatography, 262-263 Solubility, specialty polymers, 256 Spacers, flexible polymer backbones, 97 Specialty polymers, polar/ionic groups, 256 Stability, polymers, 256 Storage moduli, vs. temperature behavior, 270... 

Water-silane ratio, effect siloxane, 241 Wettability, specialty polymers, 256... 

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