Introduction
Denka™ Neoprene liquid dispersions are aqueous, colloidal dispersions of polychloroprene or copolymers of chloroprene and other monomers such as sulfur, 2,3-dichloro-1,3-butadiene. These LD products are available only as anionic surfactant systems.
Uses
Neoprene liquid dispersions are designed to have different polymeric and colloidal properties to serve a variety of applications:
- Adhesives – pressure sensitive, heat or solvent activated for laminating and contact bond,
- Binders – as saturants and wet-end additives for fibrous products such as paper, nonwovens, bonded batts, and for aggregates in resilient surfacing,
- Coatings – industrial and decorative,
- Dipped Goods – supported and unsupported films,
- Elasticized asphalt and concrete, and
- Foam.
All Neoprene liquid dispersions are suitable in any of the following general categories. Due to various characteristics, a type of Neoprene liquid dispersion may be preferred over another, depending on the application. The table below is a general guide that indicates LD types most suitable for the various applications.
Liquid Dispersions
| Grades | Solids Content, % | Crystallization | Features | Data Sheet |
|---|---|---|---|---|
| 571 | 50 | Moderate | High tensile strength |  |
| 671A | 59 | Moderate | High-solids, General purpose | |
| 750 | 50 | Very Slow | Excellent flexibility | |
| 842A | 50 | Moderate | Fast curing, Low modulus | |
Characteristics
Polymer characteristics, including crystallization rate, molecular structure, and chemical composition, can be modified primarily through the use of co-monomers. Selection of the best type of Neoprene liquid dispersion for a particular application is done by considering how differences in polymer characteristics affect the end use of the application.
The table below provides a qualitative comparison of the important properties of the four types of Denka™ Neoprene liquid dispersion.