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US 4,536,566 AGranted
Process for preparing substantially linear polyamides from acrylamide and aqueous ammonia
AssigneeThe Standard Oil Company
InventorGerald P. Coffey
Life of this patent
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Abstract
Acrylamide and methacrylamide are either self-polymerized or copolymerized with other monomers, such as amino acids, in the presence of a stoichiometric amount of aqueous ammonia and at a temperature of at least 200.degree. C. under autogenous pressure to form substantially linear polyamides, such as poly-.beta.-alanine and nylon-3/6.
Claims9
A process for preparing a substantially linear polyamide, the process comprising contacting a first monomer of the formula ##STR3## with a second monomer selected from the group consisting of:
- ##STR4## where R is a hydrogen or methyl radical, and
- R' is a C.sub.1 -C.sub.12 alkyl radical,
- in a molar ratio of about 1:1 to about 9:1 in the presence of at least a stoichiometric amount, based on the combined moles of the monomers, of aqueous ammonia at a temperature of at least about 190.degree. C. and autogenous pressure.
Dependencies are inferred from the claim text.