Réaction #75424

Équation de réaction

acrylonitrile

tert-dodecyl mercaptan

TNPP Irganox 1076

sodium stearate

sodium bicarbonate

sodium hydroxide

potassium persulfate

→

acrylonitrile/butadiene methyl ethenyl benzene

Solvants

water

Conditions de réaction

Traitement

1. 1
   AutreInto a clean, dry
2. 2
   Autrenitrogen-purged
3. 3
   workup.ADDITIONthree liter, four neck, round bottom flask was charged 272.7 g of polybutadiene latex (Polysar PL-662) (55% polybutadiene)
4. 4
   AutreThe flask was fitted with a stirrer
5. 5
   Températurethermometer, reflux
6. 6
   workup.ADDITIONcondenser and 1000 ml addition funnel
7. 7
   AutreA solution was prepared
8. 8
   Autrewas obtained
9. 9
   workup.ADDITIONThis solution was then charged into the reaction flask
10. 10
    Autrewas prepared
11. 11
    workup.STIRRINGWith stirring
12. 12
    Autrecontrolled at 60° C.
13. 13
    workup.ADDITIONmonomer addition
14. 14
    Températuremaintained at 0.5%/min
15. 15
    workup.ADDITIONAfter all the monomer had been added
16. 16
    Autrepolymerization
17. 17
    workup.ALIQUOTThe latex was sampled
18. 18
    workup.ADDITIONAntioxidant was added to the latex in the form of 42 g of an 18% emulsion
19. 19
    workup.ADDITIONcontaining 2/1

Mode opératoire

Into a clean, dry, nitrogen-purged, three liter, four neck, round bottom flask was charged 272.7 g of polybutadiene latex (Polysar PL-662) (55% polybutadiene). The flask was fitted with a stirrer, thermometer, reflux condenser and 1000 ml addition funnel. A solution was prepared by mixing 12.0 g sodium stearate, 0.9 g sodium bicarbonate, 1.5 g sodium hydroxide, 3.0 g potassium persulfate and 1322 g deionized water. The mixture was heated to 60° C. while stirring until a clear, homogeneous solution was obtained. This solution was then charged into the reaction flask to dilute the stirred polybutadiene latex. A solution containing 435.6 g of the mixture of Example 1, 164.4 g acrylonitrile and 2.7 g tert-dodecyl mercaptan was prepared and placed in the addition funnel. With stirring and the charge temperature controlled at 60° C., monomer addition was started and maintained at 0.5%/min. After all the monomer had been added, polymerization was allowed to proceed for one additional hour. The latex was sampled to determine conversion by measuring total solids content. Antioxidant was added to the latex in the form of 42 g of an 18% emulsion containing 2/1--TNPP/Irganox 1076.

Source