Friday, October 13, 2017


Cyclohexylamine is an organic compound, belonging to the aliphatic amine class. It is a colorless liquid, although like many amines, samples are often colored due to contaminants. It has a fishy odor and is miscible with water. Like other amines, it is a weak base, compared to strong bases such as NaOH, but it is a stronger base than its aromatic analog, aniline.
It is a useful intermediate in the production of many other organic compounds. It is a metabolite of cyclamate.
Cyclohexylamine is used as an intermediate in synthesis of other organic compounds. It is the precursor to sulfenamide-based reagents used asaccelerators for vulcanization. It is a building block for pharmaceuticals (e.g.,mucolyticsanalgesics, and bronchodilators). The amine itself is an effective corrosion inhibitor. Some sweeteners are derived from this amine, notablycyclamate. The herbicide hexazinone is derived from cyclohexylamine.

It is flammable, with flash point at 28.6 °C. It is toxic by both ingestion and inhalation; the inhalation itself may be fatal. It readily absorbs through skin, which it irritates. It is corrosive. Cyclohexylamine is listed as an extremely hazardous substance as defined by Section 302 of the U.S. Emergency Planning and Community Right-to-Know Act. It has been used as a flushing aid in the printing ink industry.
Source :

Cyclohexilamine in rubber applications

Rubber latex is a stable dispersion of polymeric substances in aqueous medium and is essentially a two phase systems :
1. Disperse phase ( discontinous phase of rubber molecules )
2. Dispersion medium ( aqueous continous phase of serum )

Natural Rubber Latex ( NR Latex ) is the most widely used latex for the manufacture of latex based rubber products.


          Manufacturing Process                                             Products
1. Dipped latex products                            Surgical globes, Household gloves, industrial gloves,
                                                               contraceptives, feeding bottle teats, Toy balloons etc.

2. Foamed latex products                           Mattresses, Pilows, Upholstery, Carpet Backings,
                                                               Packagings, Packaging material etc.

3. Latex extrusions                                    Latex thread.

4. Latex spreading                                     Carpet backing, Textile treatment, Paper coatings

5. Latex casting                                        Toys, Bulbs

6. Miscellaneous                                        Rubberized coir/ Fiber products, Battery separators,
                                                               Adhesives and PV Latex.

    Dipping process is described as : Immersion of a former into a suitable latex compound followed by     a slow withdrawal in such a way so that a uniform deposit of latex compound film is formed around     the outside of the former which is subsequently dried, leached, vulcanized and stripped to obtain a
    finished product.

    The dipping methods are classified as straight DIP, SINGLE DIP, MULTI DIP, WET

    DRY COACERVANT DIPPING ( Coagulant Dipping )
    The most widely used dipping method, involves use of dry coacervants such as calcium chloride,
    calcium nitrate, cyclohexyl ammonium acetate & a few other salts.

The former is then dipped into latex compound and allowed to dwell for optimum time to build up desired thickness. The dwell time depends on the type & concentration of the coacervant and the stability of latex compound towards the coacervant.

One of the example of dry coacervant solutions as belows :
Cyclohexyl ammonium acetate used as coacervant when products of optimum clarity are desired. This also provides superior bead adhesion and mild antioxdiant action.

Cyclohexilamine             12.4 pbw
Glacial acetic acid            7.6 pbw
Methyl Alcohol               80   pbw

Next " EDTA as chelating agent "

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