Styrene → Styrenemaleic anhydride

HRID 2199072Notes

Reaction equation

HRID 2199072 reaction equation
[CH2:1]=[CH:2][C:3]1[CH:8]=[CH:7][CH:6]=[CH:5][CH:4]=1.[C:9]1(=[O:15])[O:14][C:12](=[O:13])[CH:11]=[CH:10]1.[OH-].[NH4+]>O>[CH:1]([C:10]1=[CH:11][C:12]([O:14][C:9]1=[O:15])=[O:13])=[CH:2][C:3]1[CH:8]=[CH:7][CH:6]=[CH:5][CH:4]=1

Participants

5

Reactant 3

HCID 7501StyreneHCID 7923Maleic AnhydrideHCID 14923Ammonium Hydroxide2×

Product 1

HCID 54215275Styrenemaleic anhydride

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Procedure

Polymers of hydrolyzed styrene-maleic anhydride and starch were prepared according to the following process: Three or six parts of starch and one part SMA 3000 (styrene-maleic anhydride copolymer sold by Arco Chemical Company, having a ratio of styrene or maleic anhydride of 3:1, a molecular weight of 1900 and an acid number of 275) were added to and heated in water for 45 minutes at a temperature of 160° F. with stirring. Then 0.88 parts of 28% ammonium hydroxide (per part of SMA) was added with mixing for an additional 20 minutes and the final pH was adjusted to 9.5 with additional ammonium hydroxide resulting in binders having about a 25% solids content. Four polymers prepared by this process are shown in Table I.

Workup

  1. additionwith mixing for an additional 20 minutes
  2. customFour polymers prepared by this process

Sources & evidence

ORD record
ord-1c276b7ceee14decbba62289a33874f2
Source dataset
uspto-grants-1982_11
Patent number
US04361669

Reaction notes

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