초록 ▼

The present invention provides discrete particles and methods of preparing the discrete particles. The discrete particles include a plurality of abrasive grits and a polymeric material that includes a reaction product of components including (a) an epoxy-functional material, (b) at least one of a cy

The present invention provides discrete particles and methods of preparing the discrete particles. The discrete particles include a plurality of abrasive grits and a polymeric material that includes a reaction product of components including (a) an epoxy-functional material, (b) at least one of a cyclic anhydride or a diacid derived therefrom, and optionally (c) a polyfunctional (meth)acrylate. The invention also provides articles made from the discrete particles and methods of making such articles. Preferably, the articles are abrasive articles.

대표청구항 ▼

The present invention provides discrete particles and methods of preparing the discrete particles. The discrete particles include a plurality of abrasive grits and a polymeric material that includes a reaction product of components including (a) an epoxy-functional material, (b) at least one of a cy

The present invention provides discrete particles and methods of preparing the discrete particles. The discrete particles include a plurality of abrasive grits and a polymeric material that includes a reaction product of components including (a) an epoxy-functional material, (b) at least one of a cyclic anhydride or a diacid derived therefrom, and optionally (c) a polyfunctional (meth)acrylate. The invention also provides articles made from the discrete particles and methods of making such articles. Preferably, the articles are abrasive articles. d outlet tube is positioned to be in flow communication with said platelet rich plasma fraction. 6. A method of harvesting a predetermined component contained in a fluid, said method comprising: a) providing a rigid centrifuge container comprising i) a rigid annular body having an axial core; ii) an interior collection chamber for receiving and holding said fluid during centrifugation, said chamber having an outer perimeter and an inner perimeter and having a generally off-centered figure eight-shaped side cross-sectional configuration wherein the narrowest portion of said chamber is closer to the inner perimeter; iii) at least one inlet channel extending radially from said core to a distance near the outer perimeter of said chamber, the distal end of said inlet channel being in fluid communication with the interior of said chamber; and iv) at least one outlet channel extending radially from said core to a distance approximately near the narrowest portion of said chamber, said outlet channel being in fluid communication with the interior of said chamber at the narrowest portion; b) providing a centrifuge; c) securing said rigid centrifuge container to said centrifuge; d) rotating said centrifuge and said centrifuge container; e) providing an aliquot of said fluid to said rotating centrifuge container via said inlet channel, whereby said components in said fluid sample separate into fractions of similar density components within the chamber at varying radial distances from the central axis based on the densities of said components, and wherein the distal end of said outlet channel is positioned to be in flow communication with said fraction containing said predetermined component; and f) removing said predetermined component from said rotating centrifuge container via said outlet channel. 7. The method of claim 6, further comprising: g) withdrawing the remaining fractions from said chamber via said inlet channel; h) repeating steps e)-g) as needed until the desired amount of said predetermined component has been harvested. 8. The method of claim 6, wherein said inlet channel and said outlet channel are fluidly connected at their proximal ends to a multiple lumen tubing. 9. The method of claim 8, wherein the fluid is whole blood and said predetermined component is platelet rich plasma. 10. The method of claim 8, wherein said multiple lumen tubing comprises an inlet lumen fluidly connected to a whole blood source and an outlet lumen fluidly connected to a platelet rich plasma receiving container. 11. The method of claim 8, wherein said multiple lumen tubing is prevented from completely rotating about its axis during rotation of said centrifuge.