Adipic Acid → Nylon 6/66

HRID 402203

Reaction equation

HRID 402203 reaction equation
[C:1]([OH:10])(=[O:9])[CH2:2][CH2:3][CH2:4][CH2:5][C:6]([OH:8])=[O:7].[NH2:11][CH2:12][CH2:13][CH2:14][CH2:15][CH2:16][CH2:17][NH2:18].[C:19]1(=[O:26])[NH:25][CH2:24][CH2:23][CH2:22][CH2:21][CH2:20]1>>[CH2:22]1[CH2:23][CH2:24][NH:25][C:19](=[O:26])[CH2:20][CH2:21]1.[CH2:15]([CH2:16][CH2:17][NH2:18])[CH2:14][CH2:13][CH2:12][NH2:11].[CH2:3]([CH2:2][C:1]([OH:10])=[O:9])[CH2:4][CH2:5][C:6]([OH:8])=[O:7]

Participants

4

Reactant 3

HCID 196Adipic AcidHCID 7768Caprolactam2×HCID 16402Hexamethylenediamine

Product 1

HCID 168236Nylon 6/66

Conditions

Temperature
270 °C

Procedure

50 wt % aqueous solution of salt (AH salt) of adipic acid with hexamethylenediamine, and ∈-caprolactam (CL) were mixed so that AH salt was 20 parts by weight and CL was 80 parts by weight, and the mixture was charged in an autoclave of 30 liters. After it was raised to 270° C. at an internal pressure of 10 kg/cm2, the internal temperature was maintained at 245° C., while stirring, the pressure was slowly reduced to 0.5 kg/cm2 and stirring was stopped. After being returned to normal pressure by nitrogen, a strand was drawn out, pelletized, and unreacted substances were extracted out using boiling water, and dried. The thus obtained copolyamide 6/66 resin had a relative viscosity of 4.20 and melting point of 193° C.

Workup

  1. additionwere mixed so that AH salt
  2. additionthe mixture was charged in an autoclave of 30 liters
  3. temperaturethe internal temperature was maintained at 245° C.
  4. stirringstirring
  5. extractionunreacted substances were extracted
  6. customdried

Sources & evidence

ORD record
ord-54a95fcfdbf3416ea84f533be2ceef70
Source dataset
uspto-grants-2014_06
Patent number
US08742061B2

Linked notes

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