2-Vinylpyridine → Benzene, ethenyl-, polymer with 1,3-butadiene

HRID 1834361Notes

Reaction equation

HRID 1834361 reaction equation
[CH:1]([C:3]1[CH:8]=CC=CN=1)=[CH2:2].[O-]O.[C:11]1([CH:17](C)[CH3:18])[CH:16]=[CH:15][CH:14]=[CH:13][CH:12]=1.NCCNCCNCCNCCN.[K]>O>[CH2:2]=[CH:1][CH:3]=[CH2:8].[CH2:18]=[CH:17][C:11]1[CH:16]=[CH:15][CH:14]=[CH:13][CH:12]=1

Participants

6

Reactant 4

HCID 75212-VinylpyridineHCID 8197TetraethylenepentamineHCID 5462222PotassiumHCID 53627471Cumen hydroperoxide

Product 1

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

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Procedure

In a laboratory Banbury 100 grams of butadienestyrene copolymer rubber (SBR 1502), 40 grams of 2-vinylpyridine, 3 grams of cumene hydroperoxide and 1 gram of tetraethylenepentamine were mixed for 3 minutes at temperatures in excess of 325° F to cause polar grafting of the batch of rubber. This grafting operation was repeated to produce 3 more batches and the four batches of grafted product were cooled and dissolved in 16 kilograms of mixed xylenes, with the aid of agitation, over a period of 12 hours. To the grafted SB-R cement was added 240 grams of the potassium salt of coconut oil fatty acids and 20 liters of water and after mixing a coarse emulsion was formed. The coarse emulsion was converted to a fine emulsion of precursor latex sized particles ready for stripping by twice passing through the homogenizing apparatus employed in Example 2 hereof. Further treatment by the procedures of Example 1, produced a substantially quantitative yield, dry solids basis, of dilute and concentrated latices of 2-vinyl pyridine grafted butadiene-styrene rubber.

Workup

  1. customto produce 3 more batches
  2. temperaturethe four batches of grafted product were cooled
  3. additionafter mixing a coarse emulsion
  4. customwas formed
  5. customFurther treatment by the procedures of Example 1, produced a substantially quantitative yield
  6. customdry solids basis
  7. additionof dilute
  8. concentrationconcentrated latices of 2-vinyl pyridine

Sources & evidence

ORD record
ord-4742d49c8b4e4b1c90935f7eb44def9f
Source dataset
uspto-grants-1978_01
Patent number
US04070325

Reaction notes

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