Styrene acrylonitrile alloys

Worldwide sales of poly(phenylene ether)—styrene resin alloys are 100,000—160,000 t/yr (47,96) aimual growth rates are ca 9%. Other resin, particularly acrylonitrile—butadiene—styrene (ABS) polymers and blends of these resins with PC resins, compete for similar appHcations. 

Polypropylene block and graft copolymers are efficient blend compatibilizers. These materials allow the formation of alloys, for example, isotactic polypropylene with styrene-acrylonitrile polymer or polyamides, by enhancing the dispersion of incompatible polymers and improving their interfacial adhesion. Polyolefinic materials of such types afford property synergisms such as improved stiffness combined with greater toughness. 

ABS is often an alloy of styrene acrylonitrile (SAN) and polybutadiene rubber but sometimes it is a copolymer. 

General drawbacks are the natural sensitivity to heat, UV, light and weathering (but stabilized grades are marketed), cost, poor scratch resistance, creep when the temperature rises, easy combustion with dripping, electrostatic build-up, opacity of alloys made of styrene-acrylonitrile and polybutadiene. 

PC/SAN alloys are blends of polycarbonate (PC), styrene-acrylonitrile copolymer (SAN) and a special rubber system. The enhanced resistance to therm ageing allows applications such as instrument panel support for the Ford Focus C-MAX, support structures for centre consoles, armrests and cup holders. 

Acrylic-poly(vinyl chloride) alloy Acrylonitrile-butadiene-styrene-poly(vinyl chloride) alloy (ABS-PVC) Acrylonitrile-butadiene-styrene-polycarbonate alloy (ABS-PC)... 

ABA ABS ABS-PC ABS-PVC ACM ACS AES AMMA AN APET APP ASA BR BS CA CAB CAP CN CP CPE CPET CPP CPVC CR CTA DAM DAP DMT ECTFE EEA EMA EMAA EMAC EMPP EnBA EP EPM ESI EVA(C) EVOH FEP HDI HDPE HIPS HMDI IPI LDPE LLDPE MBS Acrylonitrile-butadiene-acrylate Acrylonitrile-butadiene-styrene copolymer Acrylonitrile-butadiene-styrene-polycarbonate alloy Acrylonitrile-butadiene-styrene-poly(vinyl chloride) alloy Acrylic acid ester rubber Acrylonitrile-chlorinated pe-styrene Acrylonitrile-ethylene-propylene-styrene Acrylonitrile-methyl methacrylate Acrylonitrile Amorphous polyethylene terephthalate Atactic polypropylene Acrylic-styrene-acrylonitrile Butadiene rubber Butadiene styrene rubber Cellulose acetate Cellulose acetate-butyrate Cellulose acetate-propionate Cellulose nitrate Cellulose propionate Chlorinated polyethylene Crystalline polyethylene terephthalate Cast polypropylene Chlorinated polyvinyl chloride Chloroprene rubber Cellulose triacetate Diallyl maleate Diallyl phthalate Terephthalic acid, dimethyl ester Ethylene-chlorotrifluoroethylene copolymer Ethylene-ethyl acrylate Ethylene-methyl acrylate Ethylene methacrylic acid Ethylene-methyl acrylate copolymer Elastomer modified polypropylene Ethylene normal butyl acrylate Epoxy resin, also ethylene-propylene Ethylene-propylene rubber Ethylene-styrene copolymers Polyethylene-vinyl acetate Polyethylene-vinyl alcohol copolymers Fluorinated ethylene-propylene copolymers Hexamethylene diisocyanate High-density polyethylene High-impact polystyrene Diisocyanato dicyclohexylmethane Isophorone diisocyanate Low-density polyethylene Linear low-density polyethylene Methacrylate-butadiene-styrene... 

Incorporation of Ti02 into polystyrene(s), styrene-acrylonitrile, acrylonitrile-butadiene-styrene, and other associated copolymers and alloys is normally by way of concentrates prepared on equipment similar to that used for polyethylene. This concentration step is usually necessary to achieve high-quality dis-persion so color properties are fully developed and physical properties are not compromised. 

Chemical Resistance - Acrylate Styrene Acrylonitrile Polymer / Polyvinyl Chloride Alloy... 

A material made by blending polymers or copolymers with other polymers or elastomers under selected conditions, e.g., styrene-acrylonitrile copolymer (SAN) blended with butadiene-acrylonitrile elastomer (NBR). A mixture of two chemically different polymers to form a material having properties different from but often comprising those of the original resins. Also see Polymer alloy. Low-molecular-weight polymerization product of allyl monomer, CH2 = CHCH2X, where, for example, X = -OH, -OOCCH3. 

Ronfaloy E Acrylonitrile-butadiene-styrene/EPDM alloy DSM... 

Staloy N Acrylonitrile-butadiene-styrene/PA alloys DSM Polymer Int. 

Suprel Styrene-acrylonitrile grafted on PVC, SAN or ABS/PVC alloys Vista Chemical Co. 

Alloy a- 16i also 9- loi [F aloi, fr. OF alei, fr. aleir to combine, fr. L alligare to bind] (1604) n. A blend of a polymer or copolymer with other polymers or elastomers. An important example is a blend of styrene-acrylonitrile copolymer with butadiene-acrylonitrile rubber. The term polyblend is sometimes used for such mixtures. Some... 

Dow has prepared a compatibilized blend of PC and linear PE. The compati-bilizer used was EPDM grafted with SAN. The product has high impact strength and good melt processability. Polymer alloys with S-AMS copolymer and PP with styrene-grafted polyolefin copolymer have been reported. Triax 1000 of Monsanto is a blend of nylon and ABS compatibilized with styrene-acrylonitrile and glycidyl methacrylate terpolymer. The compatibilizer often improves the property balance of an immiscible blend. Reactive compatibilization is an emerging technique. 

A polymer alloy was prepared by Lavengood, PateL and Padwa [6]. This alloy is comprised of ABS with polybutadiene rubber, a polyamide such as nylon-6 or nylon-11, and a compatibilizer. The polyamide and ABS are immiscible. The compatibilizer is selected in a fashion that it is either partially or completely miscible with the graft copolymer, and has acid functional groups that can be made to react with the end groups of polyamides. This can be a terpolymer of styrene, acrylonitrile, and maleic acid. The resulting polymer alloy has been a successful product in the commercial arena under the name of Triax 1000. The performance properties were a step change improvement. 

Acrylic Acrylonitrile-butadiene-styrene-poly(vinyl chloride) alloy... 

Polycarbonate acrylonitrile-butadiene-styrene alloy Allyl-diglycol- carbonate polymer Diallyl phthalate molding Cellulose acetate Cellulose-acetate-butyrate resin... 

As of 1992, the first specialty platable plastic, acrylonitrile—butadiene—styrene (ABS) terpolymer (see Acrylonitrile polymers, ABS resins), is used ia over 90% of POP appHcatioas. Other platable plastics iaclude poly(pheayleae ether) (see PoLYETPiERs), ayloa (see Polyamides), polysulfoae (see Polymers CONTAINING sulfur), polypropyleae, polycarboaate, pheaoHcs (see Pphenolic resins), polycarboaate—ABS alloys, polyesters (qv), foamed polystyreae (see Styrene plastics), and other foamed plastics (qv). 

The development of new polymer alloys has caused a lot of excitement in recent years but in fact the concept has been around for a long time. Indeed one of the major commercial successes of today, ABS, is in fact an alloy of acrylonitrile, butadiene and styrene. The principle of alloying plastics is similar to that of alloying metals - to achieve in one material the advantages possessed by several others. The recent increased interest and activity in the field of polymer alloys has occurred as a result of several new factors. One is the development of more sophisticated techniques for combining plastics which were previously considered to be incompatible. Another is the keen competition for a share of new market areas such as automobile bumpers, body panels etc. These applications call for combinations of properties not previously available in a single plastic and it has been found that it is less expensive to combine existing plastics than to develop a new monomer on which to base the new plastic. 

Acrylonitrile-butadiene-styrene polymers are similar in stmeture, but the acrylonitrile hardens the polymer. Minute rubber particles act as stress-relief centers, making it good for large objects luggage or car body parts. It can be chrome plated, foamed, injection molded, blown, and alloyed wiih other pla.siic. . 

We previously reported that brominated aromatic phosphate esters are highly effective flame retardants for polymers containing oxygen such as polycarbonates and polyesters (9). Data were reported for use of this phosphate ester in polycarbonates, polyesters and blends. In some polymer systems, antimony oxide or sodium antimonate could be deleted. This paper is a continuation of that work and expands into polycarbonate alloys with polybutylene terephthalate (PBT), polyethylene terephthalate (PET) and acrylonitrile-butadiene-styrene (ABS). 

---