▎ 摘　　要

NOVELTY - A thiazine oligomer (I) is new. USE - New thiazine oligomer used in graphene polishing dispersion for photosensitive composition used for lithographically coating sheet and linear substrate (all claimed). ADVANTAGE - The thiazine oligomer has excellent stability and anti-corrosive effect. DETAILED DESCRIPTION - A thiazine oligomer of formula (I) is new. R1,R2 = Me or H; R3 = linear alkyl, aryl, alkyl-derived group, or aryl-derived group;and n = 1 or 2. INDEPENDENT CLAIMS are included for the following: (1) manufacture of oligomer (I); (2) graphene polishing dispersion, which comprises 3-5 pts. wt. graphene molecular crystals and 5-20 pts. wt. thiazine oligomer (I), in weight ratio of 1:(0.25-5); and (3) photosensitive composition, which contains 10-20 pts. wt. graphene grinding dispersion, 10-30 pts. wt. photocrosslinking monomer, 10-30 pts. wt. epoxy acrylic copolymer, 0.1-3 pts. wt. additive, and 70-90 pts. wt. solvent (s2).