Urea formaldehyde Property

Density 

1.200 g/cm3

storage temp. 

-20°C

Dielectric constant

6.4（Ambient）

CAS DataBase Reference

9011-05-6(CAS DataBase Reference)

EPA Substance Registry System

Urea formaldehyde polymer (9011-05-6)

Safety

Risk Statements 

36/37/38

Safety Statements 

26-36/37/39

Hazardous Substances Data

9011-05-6(Hazardous Substances Data)

Toxicity

LD50 oral in rat: 8394mg/kg

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Warning

Hazard statements

H315Causes skin irritation

H319Causes serious eye irritation

Precautionary statements

P264Wash hands thoroughly after handling.

P264Wash skin thouroughly after handling.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P302+P352IF ON SKIN: wash with plenty of soap and water.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

P321Specific treatment (see … on this label).

P332+P313IF SKIN irritation occurs: Get medical advice/attention.

P362Take off contaminated clothing and wash before reuse.

Urea formaldehyde Chemical Properties,Usage,Production

Uses

Urea formaldehyde is a textile-finish resin of formaldehyde type for treatment of e.g., cotton and rayon materials; in wood-glue industry.

Uses

Slow-release nitrogen fertilizer for turf grass.

Production Methods

Urea-formaldehyde, a thermoset, is obtained by the condensation of urea [(NH2 )2 CO] or derivatives such as hydroxymethylurea and formaldehyde (HCHO) in the presence of a proper catalyst either basic or acid. The general equation of the first reaction is given below:
NH2 -CO-NH2 + HCHO → NH2 -CO-NH-CH2 OH + OHCH2 -NH-CO-NH-CH2 OH
A wide variety of urea-formaldehyde resins can be obtained by careful selection of the pH, reaction temperature, reactant ratio, amino monomer, and degree of polymerization. If the reaction is carried far enough, an infusible polymer network is produced. The condensation proceeds in several consecutive stages: First it yields a liquid and transparent resin easily soluble in organic solvents. Secondly, the condensation continues and the resin becomes easy to mold. Thirdly, upon heating, the resin hardens yielding a hard solid, non fusible and insoluble in organic solvents. Industrially, the condensation is maintained in the second state in order to be able to mold the resin easily. The major fillers consist of pure cellulose, caseine or cotton flocks, in order to not alter the whiteness. Once cured, urea-formaldehyde exhibits good mechanical and dielectric properties and good chemical resistance.

Origin

Urea-formaldehyde first appeared in 1929 in the USA as a substitute of glass for windows