Polyolefine polybutene

Chemical resistance is generally good up to 60°C but, as with the other polyolefins, polybutenes are attacked by oxidizing acids, chlorinated solvents, certain oxidants and aromatic hydrocarbons. 

It is estimated (GEM-CHEM) that there are 170 polypropylene sites and 376 polyethylene plants, worldwide. We have seen above that the additional polyolefins (polybutene-1, TPX, pDCPD) are made in only a handful of plants around the world, so it is likely that there are over 500 plant sites around the world producing polyolefins. 

Above 100°C, most polyolefins dissolve in various aHphatic and aromatic hydrocarbons and their halogenated derivatives. For example, polybutene dissolves in benzene, toluene, decalin, tetralin, chloroform, and chlorobenzenes. As with other polyolefins, solubiHty of PB depends on temperature, molecular weight, and crystallinity. 

Polybutenes enjoy extensive use as adhesives, caulks, sealants, and glaring compounds. They are used as plasticizers in mbber formulations with butyl mbber, SBR, and natural mbber. In linear low density polyethylene (LLDPE) blends they induce cling to stretch-wrap films. Polybutenes when modified at their unsaturated end groups with polar fiinctionahty are widely employed in lubricants as dispersants. Blends of polybutene with polyolefins produce semisoHd gels that can be used as potting and electrical cable filling materials. 

Other polyolefins A variety of other crystalline polyolefins are available such as polybutene-1 (improved creep resistance over polyethylene), poly-4-methyl pentene-1 (excellent temperature deformation resistance) and ethylene-vinyl acetate (greater flexibility). 

Polybutene is a polyolefin differing from polyethylene and polypropylene by the number of carbon atoms in the pendant groups. Polybutene is mainly used for sealing, films and pipes conveying pressurized hot and cold water. 

POLYOLEFIN. A class or group name for thermoplastic polymers derived from simple olefins among the more important are polyethylene, polyproplene, polybutenes, polyisoprene, and their copolymers. Many are produced in the form of fibers. This group comprises the largest tonnage of all thermoplastics produced. 

Charlet, G. Ducasse, R. Delmas, G., "Thermodynamic Properties of Polyolefin Solutions at High Temperature 2. Lower Critical Solubility Temperatures for Polybutene-1, Polypen-tene-1 and Poly(4-methylpentene-1) in Hydrocarbon Solvents and Determination of the Polymer-Solvent Interaction Parameter," Polymer, 22, 1190 (1981). 

Ethanox 376 is a stabilizer that provides heat stability by preventing thermo-oxidative degradation during processing and service life. It provides compatibility with resins and extraction resistance. It can be applied in polyolefins, such as polyethylene, polypropylene, polybutene-1 and other polymers such as engineering plastics, styrenes, polyurethanes, saturated and unsaturated elastomers, styrenics, rubber modified styrenics, segmented block copolymers, and PVC. 

A patent (6) assigned to the Societe Nationale des Petroles d Aqui-taine covers the use of, for example, a polymer made by the interaction of epichlorohydrin, hydrogen sulfide, and alkali or alkaline earth polysulfide in aqueous solution. This polymer, HS—[CH2—CHOH—CH2— S]nH where n = 4-24, is mixed with elemental sulfur, a polyolefin (e.g. polybutene), and an olefin (e.g. styrene). This type of mixture, after heating at 140-160 °C, has been used for traffic striping and is said to be serviceable without flaking after 1 years use, despite heavy traffic. 

The choice of date range is arbitrary. The number of journal articles for each year was obtained from a search of electronic version of English-based polymer and polymer-related journals using the keywords polyolefin and blends. Within polyolefin keyword, the subkeywords used in the search were polyethylene (PE, LLDPE, LDPE, HDPE, UHMWPE, PE, etc.), polypropylene (PP, iPP, sPP, aPP, etc.), polybutene-1, poly-4-methylpentene-l, ethylene-diene monomer, ethylene-propylene-diene terpolymer, ethylene propylene rubber, thermoplastic olefins, natural rubber (NR), polybutadiene, polyisobutylene (PIB), polyisoprene, and polyolefin elastomer. For the polyolefin blends patent search, polymer indexing codes and manual codes were used to search for the patents in Derwent World Patent Index based on the above keywords listed in the search strategy. 

Polyethylene and polypropylene are the polyolefins most commonly used as plastics. Polybutene-1 and poly-4-methylpentene-l are less common. Also important are certain copolymers of ethylene and also polyisobutylene, which is used for gaskets. The simplest method of identification of these materials is by infrared spectroscopy (see Section 8.2). However, some information can also be obtained from the melting range (see also Section 3.3.3) ... 

General Description Polybutene-1 (PB-1) is a polyolefin, or unsaturated polymer, that is expressed as C H2n- Basell Polyolefins series polybutene-1 resins are high-molecular-weight polyolefins manufactured from butene-1 monomer. Available as a homopolymer or a random copolymer.t Polybutene is a polymer of butylene and is also called polybutylene. 

Polybutene Polybutene-1 (PB-1), is a polyolefin, or unsaturated polymer, that is expressed as CjjHjjj. 

Polybutene-1 General Properties Basell Polyolefins. (http //www.basell.com/mati/ 1,1430,1 280,00.html)... 

Polybutene-1, PB-1, or polybut-l-ene is another stereospecific (isotactic) polyolefin polymer, discovered by Prof. Giulio Natta in 1954. It is a linear high molecular weight crystalline thermoplastic polymer, with low density (0.91). The ethyl side groups create entanglement, which provides for the very good creep resistance of this polymer, which also has an abrasion resistance comparable to UHMWPE, and an excellent resistance to chemicals and environmental stress-cracking. 

Polybutene-1 is a polyolefin with rather specially/niche applications. A few examples are pipes for domestic and commercial hot and cold water plumbing and heating systems. Blended with PE, it forms a two-phase stmcture which is the basis of seal peel technology (easy-opening flexible packaging). Hot water tanks are... 

Another ordered polymer, which appears as a new homolog in polyolefin family, is the polybutylene (polybutene-1). 

Polybutylene (Polybutene-1) Polybutylene is the youngest member of the polyolefin family (1965), being linear in stmcture... 

Hydrogenated rosin Methyl rosinate Methylstyrene/vinyltoluene copolymer Paraffin, chlorinated Pentaerythrityl hydrogenated rosinate Pentaerythrityl rosinate Polybutene Polydipentene Polyvinyl methyl ether Rosin Sorbeth-20 Terpene resin tackifier, adhesives EVA-based Dipentene-styrene resin tackifier, adhesives rubber-based Dipentene-styrene resin tackifier, amorphous polyolefins C5 hydrocarbon resin, aliphatic tackifier, antifouling paints Methyl hydrogenated rosinate tackifier, butyl rubbers C5 hydrocarbon resin, aliphatic tackifier, caulks C5 hydrocarbon resin, aliphatic tackifier, cement... 

Polyolefin compositions with improved toughness, flexibility, and high clarity were prepared by blending 90-95 wt% setereoregular polymer or copolymer of 4-methyl-l-penteme, PMP, with polybutene, PE, having Mg < 500 ... 

Thermoplastic polyolefin (TPO) elastomers are typically composed of ethylene propylene rubber (EPR) or ethylene propylene diene M (EPDM) as the elastomeric segment and polypropylene thermoplastic segment. LDPE, HDPE, and LLDPE copolymers ethylene vinyl acetate (EVA), ethylene ethylacrylate (EEA), ethylene, methyl-acrylate (EMA) and polybutene-1 can be used in TPOs. Hydrogenation of polyisoprene can yield ethylene propylene copolymers, and hydrogenation of 1,4- and 1,2-stereoisomers of S-B-S yields ethylene butylene copolymers. ... 

HDPE immiscibly blends with hutyl ruhher [14] to provide improved chemical resistance, compression set and high-temperatnre mechanical properties versus nnvnlcanised hlends. LDPE and HDPE blend immiscibly with ethylene copolymers to improve environmental stress crack resistance, tonghness, filler acceptance, film tear resistance, improved flexibility and so on. In polyolefin, polybntene-1 forms miscible blends with PP [15,16]. The addition of PP to polybutene-1 increases the crystallisation rate of polyhntene-1 and would have utility as a nucleation additive. 

Thus polyethylene, polypropylene, polybutene, and their copolymers are grouped into one subclass. This subclass is generally referred to as polyolefins in commercial trade. Polystyrene, its copolymers, and alloys form a second subclass with vinyls and copolymers forming a third and so on. The latter subclasses are generally referred to by a title referencing the base monomer (e.g., vinyls). 

In this section, we are concerned with a polyolefin class of polymers, which includes polyethylene, polypropylene, polybutene, polybutadiene resins, and their various copolymers. 

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