Patent ID: 11904574
Assignee: 3M INNOVATIVE PROPERTIES COMPANY
Field: Surface technology, coating (Chemistry)
Classification: CPC B  C | IPC B  C

Claim 0:
1. A scratch resistant film comprising a stretchable surface layer, the surface layer comprising:
a binder comprising a urethane resin;
urethane resin beads having an average particle diameter of 3 μm to 30 μm;
hard particles having an average particle diameter of 5 μm to 45 μm, wherein a ratio of the average particle diameter of the hard particles to the average particle diameter of the urethane resin beads is not less than 1.2, wherein the hard particles have a spherical shape; and
nanosilica particles;
wherein the surface layer comprises from 30 parts by mass to 500 parts by mass of the hard particles based on 100 parts by mass of the binder; and the gloss of the surface layer is 5.5 GU or less at 60 degrees, wherein the surface layer comprises from 30 parts by mass to 500 parts by mass of the nanosilica particles based on 100 parts by mass of the binder.