more about urea formaldehyde

7/24/2019 More about Urea formaldehyde

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!AIM:- To synthesize Urea formaldehyde resin and

to study about its uses, properties and health effects.


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is is cer

#$

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at Shivam Choudhary student o

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'II Sudhamani of Amrita Vidyalayam ha(

)a#sfacrily comple*d %e project en#tled +Ure,

-ormaldehyde resin .plas#c/0prescribed by CBSE

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2ikram Sarabhai communi3 science cen*r in %4

5ear 201562016 . 7

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rincipal ;

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9rahmacharini Umaji 7

:

mrita Vidyalayam

7

7

;chool stamp :7

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rnal Examiner:

7


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!cknowledgement

!

I would like to express my special gratitude to Amma , Mata

Am rita Anandm ayi Devi. I would like to express m y special

thanks toour principal , Brahm acharini Um aji as well at my

teacher Ms. Shaji who gave me the golden opportunity to do

this wonderful project entitled Urea form aldehyde resin

(plastic) .

!I would also like to thank the mem bers of Vikram Sarabhai

my comm unity science center, Ahmedabad , for providing

help and guidance in order to set up the experiment with

equipm ent and facilities available at this precious center.

!I am really thankful to my parents and m y friend who

helped m e a lot in finishing this project within the specific

time.


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#ndex:

1.

Declaration

2. Bibliography

3.

Laboratory process of urea

formaldehyde synthesis.

3.

Properties of urea form aldehyde resin .

4.

Uses of urea formaldehyde

5. Health effects

Page no.

5

6

7

11

12

14


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9 ibliography

!Sources

" Google images.com and G oogle.com

"

https:/ /en.wikipedia.org/wiki/Urea-formaldehyde

" http: / /ww w.proteachemicals.co.za/pe bble.asp?

relid=1462

"

http:/ /blog.oureducation.in/properties-and-uses-of-

urea-formaldehyde-resin/

" Vikram sarabhai provided procedur .


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! Measure 10 grams of Urea and add in a beaker using a spatula.

!

Measure 25 milliliters of formaldehyde using a measuring

cylinder and add to beaker

! Stir the mixture till urea gets dissolved completely.

!

Keep the beaker containing solution on a wire

gauge and then on a tripod stand.

! Start a Bunsen burner under the tripod stand and heat the

solution while stirring continuously.

! After some time the urea and formaldehyde will react

chemically react together.

! Now remove the beaker from the tripod stand and allow

it to cool for som etime. And transfer in a glass petri dish.

Procedure :


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! Add food color to solution to give color to

the plastic and stir the solution.

! In order to harden the plastic , add a few

drops of weak solution of citric acid to

the solution.

!A thick colure opaque paste is obtained.

!

This paste can be moulded in any shape

by pouring it in suitable moulds.

! Keep the mould in some warm place for few

hours.

! Rem ove plastic from

the mould carefully

with the of sharp

object.


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# Precautions:

! keep your eyes away from the fumes coming from plastic .

! Safely handle formaldehyde cause it causes cancer.

!You have formed plastic.

! A pictorial representation of changes in plastic

Coloured solution of UF UF paste into the mould Plastic formed

# Observation:

A hard opaque plastic is formed .


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! It is clear solution and opaque solid after condensation .

!

It has a very high tensile strength and the property of##flexural

modulus.

! It has boiling point of about 100C and Has the property of heat

distortion temperature.

! It has density#of~ 1.2g/cm has the capacity of low w ater absorption.

! It has the property of mould shrinkage.

!

It Has a property of high surface hardness.

! It can be elongated ##at break.

! It has tendency to hydrolyses, or decompose, in extremely hum id

conditions and It is volume resistance in nature

.

8roper#es of Urea formaldehyde:7


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? ses of Urea formaldehyde resign:7

!

Urea formaldehyde is the very comm on chemical and is

mostly used because of its chemical properties. Examples

are textiles, paper, foundry sand molds, wrinkle resistant

fabrics, cotton blends, rayon, corduroy, etc. also used to

glue wood together. Urea formaldehyde is mostly used

when producing electrical appliances ex switches etc

!

It is widely chosen as an adhesive because of its property of

high reactivity, wonderful performance#and#low price. It is

a chemical combination of urea and formaldehyde and is

not poisonous in nature.

!

It is also use to insulate the wall which is

knows as urea formaldehyde foam insulation

(UFFI).

UF Adhesive


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! The Examples of amino resins include tires from

autom obile industry in order to improve the bonding of

rubber to tire cord, paper for improving tear strength,

molding electrical devices, molding jar caps, etc.

! They are mainly used in the manufacture of pressed

wood products .it is also used to make particle

boards ,floor panels, decorating materials, plastic

utensils .

!Urea formaldehyde is also used in agricultural field

#

as a

source of n itrogen fertilizer and Its#rate of decom position

is into CO 2 and N H3 and is determined by the action of

microbes found naturally in

#

soils. (image of urea

formaldehyde treated crystals as fertilizer).


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$eal%e&ects :!

Health effects occur when urea-formaldehyde based

materials and products release formaldehyde into the air.

Form aldehyde causes cancer. Generally there are no

observable health effects from formaldehyde when air

concentrations are below 1.0 ppm . The onset of respiratory

irritation and other health effects, and even increased cancer

risk begins when air concentrations exceed 3.0-5.0 ppm. This

triggers watery eyes, nose irritations, wheezing and

coughing, fatigue, skin rash, severe allergic reactions,

burning sensations in the eyes and throat, nausea, and

difficulty in breathing in some hum ans (usually > 1.0

ppm).

#

Occupants of UFFI(urea formaldehyde foam

insulation) insulated homes with elevated formaldehyde

levels experienced systemic sym ptoms such as headache,

malaise, insomnia, anorexia.#


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! Irritation of the#mucus membrane#(specifically the eyes,

nose, and throat) was a comm on upper respiratory tract

symptom related to formaldehyde exposure. How ever

when compared to control groups, the frequency of

symptoms did not exceed the controls except when it

cam e to wheezing, difficult breathing, and a burning skin

sensation. Controlled studies have suggested that

tolerance to formaldehyde s odor and irritating effects

can occur over a prolonged exposure.

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