Реакция #75424

Уравнение реакции

acrylonitrile

tert-dodecyl mercaptan

TNPP Irganox 1076

sodium stearate

sodium bicarbonate

sodium hydroxide

potassium persulfate

→

acrylonitrile/butadiene methyl ethenyl benzene

Растворители

water

Условия реакции

Обработка

1. 1
   ДругоеInto a clean, dry
2. 2
   Другоеnitrogen-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
   ДругоеThe flask was fitted with a stirrer
5. 5
   Температураthermometer, reflux
6. 6
   workup.ADDITIONcondenser and 1000 ml addition funnel
7. 7
   ДругоеA solution was prepared
8. 8
   Другоеwas obtained
9. 9
   workup.ADDITIONThis solution was then charged into the reaction flask
10. 10
    Другоеwas prepared
11. 11
    workup.STIRRINGWith stirring
12. 12
    Другоеcontrolled at 60° C.
13. 13
    workup.ADDITIONmonomer addition
14. 14
    Температураmaintained at 0.5%/min
15. 15
    workup.ADDITIONAfter all the monomer had been added
16. 16
    Другоеpolymerization
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

Методика

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.

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