Polyamide tackifying resins

The basic resins need some form of modification to achieve (1) suitable application viscosities, (2) flexibility, and (3) reduction in costs if possible. Suitable polyamide resins (those of the more flexible variety) are thus frequently modified by the addition of EVA copolymer (high-viscosity, high-melt-point grade). The amount of EVA that can be added is restricted to a maximum of 25% in most cases because of compatibility problems. The blend is then further modified with selected tackifying resin addition and small quantities of filler, to reach an optimum balance of performance properties. To achieve maximum adhesion, it is common for polyamide hot melts of this type to be used in conjunction with a polyamide resin solution primer system for edging material. The primer is invariably a dilute solution of the base polyamide resin. 

The basic polyamide resins need some modification to obtain suitable application viscosity, correct flexibility and to reduce their high cost, when this is possible. The more flexible types of polyamide resins are then often modified by the addition of up to 25% of higher viscosity and higher melt index EVAs. This type of blend can be further modified by addition of selected tackifying resins and small amounts of fillers, to optimize the balance of properties of the system. To achieve maximum adhesion, it is common for polyamide hot melts to be used in conjunction with a polyamide resin primer for edging material. The primer is generally a dilute solution of the basic polyamide resin. 

Benefos 1680 is a secondary antioxidant. It is particularly useful in polyolefins and olefin-copolymers such as polyethylene, polypropylene, polybutene and ethylene vinyl acetate copolymers as wall as polycarbonate and polyamids. Other applications Include use in linear polyesters, high impact polystyrene, ABS, SAN, adhesives, natural and synthetic tackifier resins, elastomers such as BR, IR, euid other organic siibstrates. 

Oxidized castor oils are excellent nonmigrating, nonvolatile plasticizers (qv) for ceUulosic resins, poly(vinyl butyral), polyamides, shellac, and natural and synthetic mbber (see Rubber, natural). The high viscosity products are also used as tackifiers in gasket compounds and adhesives (qv) because of good oil and solvent resistance. They also serve as excellent pigment grinding media and as a base for inks (qv), lubricating oils, and hydrauHc oils (62). 

Trade Name Synonyms Aztec CHP-50-P1 T[Aztec Peroxides] Aztec CHP-90-W1 T[Aztec Peroxides] Aztec CHP-HA-1 T[Aztec Peroxides] Cyclonox BT-50 T[Akzo Nobel http //www.akzonobel.com]] Luperox K4CE [At ofi n a http //www. atofinachemicals. com] Perhexa H j[NOF http //www.nof.co.jp] Cyclohexanone resin Synonyms Ketone resin Properties Colorless to pale yel. solid sol. in oxygenated solvs. insol. in aliphatic solvs. and water acid no. 0 hyd. no. 0 Uses Adhesion promoter in printing inks modifier for clear metal cellulose lacquers tackifier for polyamide hot-melt adhesives in food-pkg. adhesives floor paints Regulatory FDA 21CFR 175.105... 

Hydroabietyl alcohol Pine (Pinus palustris) tar tackifier, polyamide hot-melt adhesives Cyclohexanone resin Rosin, polymerized... 

Water-based dispersions or emulsions such as polyvinyl acetate, acrylics, polyvinyl chloride and polyvinyl alcohol with plasticizers and tackifiers. In addition, this range can include urea formaldehyde and phenolic adhesives, resins, natural adhesives produced from starch, dextrin, casein, animal glues (see Polyvinyl alcohol in adhesives, Phenolic adhesives single-stage resoles. Phenolic adhesives two-stage novolacs. Animal glues and technical gelatins) and rubber latex (see Emulsion and dispersion adhesives). Solvent-free 100% solids such as polyurethane. Hot melt adhesives include Ethylene-vinyl acetate copolymers, polyolefins, polyamides, polyesters with tackifiers and waxes. More recent additions include cross-linkable systems. 

Oxidized (blown) c.is used as a plasticizer for cellulose-, polyvinylbutyral- and polyamide-resins and also for natural and synthetic rubber. It is also an excellent tackifier in adhesives, a pigment grinding medium and a base for - inks, - lubricating oils and - hydraulic fluids. 

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