Hot-melt polyester

Cyclohexanedimethanol dibenzoate adhesive modifier, hot-melt polyesters... 

Plasticized PVC and vinyl chloride-vinyl acetate copolymers can be wiped with solutions of adipic, maleic, citric, and other acids, giving improved adhesion when bonding with hot-melt polyester adhesives. ... 

This type of adhesive is generally useful in the temperature range where the material is either leathery or mbbery, ie, between the glass-transition temperature and the melt temperature. Hot-melt adhesives are based on thermoplastic polymers that may be compounded or uncompounded ethylene—vinyl acetate copolymers, paraffin waxes, polypropylene, phenoxy resins, styrene—butadiene copolymers, ethylene—ethyl acrylate copolymers, and low, and low density polypropylene are used in the compounded state polyesters, polyamides, and polyurethanes are used in the mosdy uncompounded state. 

OC-Methylstyrene. This compound is not a styrenic monomer in the strict sense. The methyl substitution on the side chain, rather than the aromatic ring, moderates its reactivity in polymerization. It is used as a specialty monomer in ABS resins, coatings, polyester resins, and hot-melt adhesives. As a copolymer in ABS and polystyrene, it increases the heat-distortion resistance of the product. In coatings and resins, it moderates reaction rates and improves clarity. Physical properties of a-methylstyrene [98-83-9] are shown in Table 12. 

Some grades of polyurethane and polyester copolymers are used as hot-melt adhesives. AppHcations include shoe manufacture and as an adhesive interlayer in coextmsion. 

Block copolymers can contain crystalline or amorphous hard blocks. Examples of crystalline block copolymers are polyurethanes (e.g. B.F. Goodrich s Estane line), polyether esters (e.g. Dupont s Hytrel polymers), polyether amides (e.g. Atofina s Pebax grades). Polyurethanes have enjoyed limited utility due to their relatively low thermal stability use temperatures must be kept below 275°F, due to the reversibility of the urethane linkage. Recently, polyurethanes with stability at 350°F for nearly 100 h have been claimed [2]. Polyether esters and polyether amides have been explored for PSA applications where their heat and plasticizer resistance is a benefit [3]. However, the high price of these materials and their multiblock architecture have limited their use. All of these crystalline block copolymers consist of multiblocks with relatively short, amorphous, polyether or polyester mid-blocks. Consequently they can not be diluted as extensively with tackifiers and diluents as styrenic triblock copolymers. Thereby it is more difficult to obtain strong, yet soft adhesives — the primary goals of adding rubber to hot melts. 

Throughout the 1990s a large portion of the research and development effort for hot melt adhesives focused on developing adhesives that are either environmentally friendly or functional [69,81,82]. Environmentally friendly attributes include biodegradability, water dispersibility (repulpability), renewability, and water releasability. Biodegradable adhesives have been developed based on starch esters [83-86] and polyesters such as poly (hydroxy butyrate/hydroxy valerate) [87], poly(lactide) [88-91], and poly(hydroxy ether esters) [92-94]. All but the... 

Crystalline polyesters are highly important as adhesive raw materials. They are normally crystalline waxes and are highly symmetrical in nature, which can aid the crystallization process [26]. Poly(hexamethylene adipate) and poly(caprolactone), shown in Table 2, are only two of the many crystallizable backbones. Poly(ethylene adipate) and poly(letramethylene adipate) are also commonly used in urethane adhesives. The crystalline polyesters are used in curing hot melts, waterborne polyurethanes, thermoplastic polyurethanes, and solvent-borne urethane adhesives. The adipates are available mostly as diols. The poly(caprolactones) are available as diols and triols. 

Results are presented of experiments undertaken by Gaiker in the manufacture of sandwich panels containing foam cores based on PETP recycled by a solid state polyaddition process developed by M G Ricerche. Panels were produced with glass fibre-reinforced unsaturated polyester and epoxy resin skins, and allthermoplastic panels with PE, PP, PS and glass fibre-reinforced PETP skins were also produced. EVA hot melt adhesives and thermoset adhesives were evaluated in bonding glass fibre-reinforced PETP skins to the foam cores. Data are presented for the mechanical properties of the structures studied. 

Key Q powdered resin compositions R = a(jueous latexes, emulsions, dispersions S- organic lacquer solutions and dispersions T - plastisol and organosol formulations U = natural and synthetic rubber compositions V = hot-melt compositions W = thermoplastic masses X = oleoresinous compositions Y = reading formulations, eg.. epoxy and polyester Z = plastic monomers Dry thickness-... 

Dynacoll [Huls America]. TM for a polyester for reactive hot melts. 

Use Hot-melt and pressure-sensitive adhesives, mastics and sealants, varnishes, ester gum, soldering compounds, core oils, insulating compounds, soaps, paper sizing, printing inks, polyesters (formed by reaction of the conjugated acids of rosin with acrylic acid, followed by reaction with a glycol). 

PMDA has also been claimed to improve the quality of polyester based adhesives(26), acrylics(27), and epoxies(29). The inclusion of PMDA into thermoplastic and copolyester rubber, with alkaline earth filler, is claimed to make an excellent hot-melt adhesive(30). 

According to the chemical structure of the hot-melt adhesive polymers (polyamide resins, saturated polyester, ethylene vinyl acetate copolymers, polyurethanes), the processing temperatures range between 120 and 240 °C. 

The carrier may be glassine, cellulose film, and polyester film. The choice of carrier relates to speed and transfer temperature. Polyester (i.e. Melinex) is the most common base. It is suitable for flat, cylindrical or radiused surfaces. The process is used for online printing. Metallic foil consists of a carrier, release coating, lacquer metallised layer and a hot melt type adhesive specially formulated for the substrate. 

Of the fibers listed in Table II, polyester and polyamide polymers are made by hot melt polymerizations. Because the... 

Pripol. [Unichema Unichema France SA] IMmer or trimer acids modifier for nylon, polyester fibers used in polyamide for hot melt adhesives, thermographic inks, urrfhane elastomers, industrial lubricants, fuel additives, surface coadng resins, spin finishes. 

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