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

HRID 488017Notes

Reaction equation

HRID 488017 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

Into a reactor equipped with a stirring means, a heating and cooling means and a pipe for supplying starting materials and having an internal capacity of 40 l, 14.7 kg of latex A-1 obtained in Example 1 and 2.5 kg of deionized water were charged, and at a temperature of 40° C., 72 g of acetic anhydride and 1.4 kg of deionized water were added and mixed. After stirring for about 1 minute, the mixture was left to stand for 10 minutes. Then, 30 g of sodium salt of a condensation product of β-naphthalene sulfonic acid with formaldehyde, 110 g of 48% potassium hydroxide and 880 g of deionized water were added and stirred to obtain a butadiene-styrene rubber copolymer latex containing rubber particles having the particle sizes increased. The pH of this latex was 7.5, the solid content was 29.1% by weight, and the average particle size of rubber was 0.25 μm (as measured by the measuring method as mentioned above). The latex thus obtained will be referred to as latex B-2.

Workup

  1. customInto a reactor equipped with a stirring means
  2. temperaturea heating and cooling means
  3. additionwere charged
  4. additionmixed
  5. waitthe mixture was left
  6. waitto stand for 10 minutes
  7. stirringstirred

Sources & evidence

ORD record
ord-ff3688e20ab0445fb893702f777399c8
Source dataset
uspto-grants-1994_03
Patent number
US05298563

Reaction notes

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