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

Participants

Reaction Steps

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.

Provenance & Evidence