Formaldehyde → Benzene, ethenyl-, polymer with 1,3-butadiene

HRID 486181Notes

Reaction equation

HRID 486181 reaction equation
C(OC(=O)C)(=O)C.[Na].[CH:9]1[C:18]2[C:13](=[CH:14][CH:15]=CC=2)[CH:12]=[CH:11][C:10]=1S(O)(=O)=O.C=O.[OH-].[K+]>O>[CH2:18]=[CH:9][CH:10]=[CH2:11].[CH2:15]=[CH:14][C:13]1[CH:18]=[CH:9][CH:10]=[CH:11][CH:12]=1

Participants

7

Reactant 5

HCID 712FormaldehydeHCID 7918Acetic AnhydrideHCID 84202-Naphthalenesulfonic acidHCID 14797Potassium HydroxideHCID 5360545Sodium

Product 1

HCID 62697Benzene, ethenyl-, polymer with 1,3-butadiene

Reagents, catalysts & solvents 1

HCID 962WaterSolvent3×

Procedure

14.7 kg of Latex A-1 and 2.5 kg of deionized water are charged into a 40 l reactor equipped with a stirrer, heating and cooling apparatus, and a raw material supplying tube. Then, 72 g of acetic anhydride and 1.4 kg of deionized water are added and mixed at 40° C. After stirring and mixing for about 1 minute, the mixture is allowed to stand for 10 minutes. Then, 30 g of the sodium salt of a condensate of beta-naphthalene sulfonic acid and formaldehyde; 110 g of potassium hydroxide (48%) and 880 g of deionized water are added, while stirring. A butadiene/styrene copolymer rubber latex with an average particle size of 0.25 μm is obtained. The pH of this latex is 7.5 and the solid content is 29.1%.

Workup

  1. customequipped with a stirrer
  2. temperatureheating
  3. temperaturecooling apparatus
  4. additionmixed at 40° C
  5. additionmixing for about 1 minute
  6. stirringwhile stirring

Sources & evidence

ORD record
ord-42859893ebe9412da45b86aa42948973
Source dataset
uspto-grants-1994_03
Patent number
US05290867

Reaction notes

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