PEP Review 85-3-1
Tetramethylene Diamine for Nylon 4,6
DSM has commercialized nylon 4,6,trademark Stanyl�. Nylon 4,6 has properties superior to those of nylon 6,6 and nylon 6, which, according to DSM, will allow this new nylon to compete as a low-cost engineering plastic.
This review presents SRI's technoeconomic evaluation of a 20 million lb/yr (9,100 metric tons/yr) TMDA plant. The diamine is for use in the production of 44 million lb/yr (20,000 metric tons/yr) nylon 4,6. At this production rate, the product value of TMDA would be more than the estimated product value of nylon 6,6 at 44 million lb/yr. The product value of nylon 4,6 is, however, comparable with the product values of other low-cost engineering plastics, such as polybutylene terephthalate, polycarbonate, polyphenylene oxide, and polyphenylene sulfide.
By: Yu-Ren Chin and Jung-Chen Chen (August 1986)