/ ,f you re developing new polymers or looking to improve the performance of existing materials, we can
help. Vinyltoluene, divinylbenzene, and vinylbenzyl chloride are specialty styrenic monomers with functional and processing properties which improve physical properties and make production easier for a wide range of polymer-based products. Here's a brief overview of each.
SPECIALTY STYRENIC MONOMERS CH = CH,
•CH = CH2 Divinylbenzene—an exceptional cross-linking agent that improves polymer properties Just a small amount of divinylbenzene (DVB) can significantly improve the capabilities of your polymer or elastomer. For example, cross-linking polystyrene with divinylbenzene increases solvent resistance, heat distortion, impact strength, tensile strength, and hardness. And when you need the divinyl functionality for more than just cross-linking, as in the creation of new specialty intermediates or polymers, Dow's unique high-purity grade DVB-HP (70%-85% DVB) should be of particular interest.
CIRCLE 8
drying oils of low iodine value such as soybean, cottonseed, tall oil, and tall oil esters. In certain reactions, VT gives better kinetics and solubility. In unsaturated polyesters, VT can increase cure temperature and reduce shrinkage. Compared with styrene, VT has a lower vapor pressure and higher flash point for safer handling. Because VT is less volatile, it is easier to meet government emission standards. CIRCLE 9
CH = CH,
CH,CI Vinylbenzyl chloride—a dual functional monomer you can polymerize or copolymerize before or after functional group reactions
Vinylbenzyl chloride (VBC), also called chloromethylstyrene (CMS), offers you the versatility to create exciting new CH = CH, polymers. You can react VBC before polymerization or polymerize it first and then carry out a reaction on the chloromethyl group. So you can work with Vinyltoluene—the versatile, easy-toreactants and polymers in a way that handle alternative to styrene makes the most sense for your applicaVinyltoluene (VT) offers significant tion. VBC also gives you flexibility in advantages over styrene in many applica- polymerization. It can be homopolymertions. In alkyd paints, VT lets you use ized or copolymerized using solution,
suspension, ionic, mass, emulsion, and other specialized techniques, CIRCLE 10
Now, of course, there are other good reasons to call Dow when the job calls for a specialty styrenic (or vinyl) monomer. Here are two very important ones. First, all Dow Specialty Monomers are produced under the tightest statistical quality controls—beginning with raw materials right through production and on to storage and shipping of the finished monomers. (In fact, these "quality steps" are so extensive we've published an entire brochure on the subject.) Second, and equally important, these monomers are supported by a staff of premier monomer specialists. They're ready to help you decide when, why, and how to use each product...or steer you to another that will work better. So if the job calls for a special styrenic monomer, give us a call. Dial 1-800-258-2436.
^ ^ S
SPECIALTY
SI 1 snonomsrs DOW ^Trademark of The Dow Chemical Company
