The variety, classification and commercial production of bio-based polyamides were described in details, as well as bio-based polyamides development in China. Bio-based PA11and bio-based PA1010 are well-known bio-based polyamides we discussed the origin materials of the precursors, the route of manufacturing bio-based PA11 and PA1010, and their modifications status. We discussed the properties of bio-based polyamides. In this paper, we discussed the route of the precursors of bio-based polyamides that come from bio-based materials. Bio-based polyamides precursors include bio-based amino acids, bio-based lactams, bio-based diprotic acid and bio-based diamines. The precursors of bio-based polyamides come from bio-based materials such as castor oil, glucose and animal oil. Huang, Zhengqiang Cui, Zhe Zhang, Heming Fu, Peng Zhao, Qingxiang Liu, Minyingīio-based polyamides are environment-friendly polymers. In yet another embodiment of the invention, the crosslinking agent is selected from the group consisting of epoxy resins having more than one epoxide group per molecule. In still another embodiment of the invention, the crosslinking agent is selected from a phosphine having the general formula (A).sub.2 P(B) and mixtures thereof, wherein A is hydroxyalkyl, and B is hydroxyalkyl, alkyl, or aryl. In another embodiment of the invention, the crosslinking agent is an aliphatic aldehyde or aromatic aldehyde compound having 2 or more -CHO groups. In one embodiment of the invention, the crosslinking agent is an aliphatic or aromatic isocyanate compound having 2 or more -N.dbd.C.dbd.O groups. The crosslinked polyamide material comprises a crosslinked chemical combination of (1) a polyamide of the formula: #STR1# wherein n is between about 50 and 10,000, wherein each R is between 1 and 50 carbon atoms alone and is optionally substituted with heteroatoms, oxygen, nitrogen, sulfur, or phosphorus and combinations thereof, wherein multiple of the R are in vertically aligned spaced relationship along a backbone forming the polyamide, and wherein two or more of the R contain an amino group and (2) a crosslinking agent containing at least two functional groups capable of reacting with the amino groups of the polyamide. Taylor, Andrew C.Ī crosslinked polyamide material and a process for preparing the crosslinked polyamide material are disclosed.
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