Abstract: Disclosed are hollow polymer spheres prepared from one or more hydrophilic ethylenically unsaturated monomers containing acid functionality, one or more nonionic hydrophilic ethylenically unsaturated monomers, and one or more hydrophobic ethylenically unsaturated monomers. Disclosed is a process for preparing such hollow spheres. The hollow spheres exhibit controlled particle size, which can have larger particle sizes, narrow particle size distributions and high void volume percentages.

Abstract: Disclosed are hollow polymer spheres prepared from one or more hydrophilic ethylenically unsaturated monomers containing acid functionality, one or more nonionic hydrophilic ethylenically unsaturated monomers, and one or more hydrophobic ethylenically unsaturated monomers. Disclosed is a process for preparing such hollow spheres. The hollow spheres exhibit controlled particle size, which can have larger particle sizes, narrow particle size distributions and high void volume percentages.

Abstract: Flat items, such as envelopes, having some degree of inherent resiliency are prepared for dispensing by releasably fastening them to one side of a support tape along the length thereof, in a manner such that successive items are fastened at successive sections along the tape, by then folding the tape to place the items in a single stack, and by placing this stack in a storage shaft with one end of the tape protruding from the shaft, and the items are dispensed by pulling the successive sections of the tape out of the shaft, starting with such one end, deflecting each such successive section of the tape over a guide surface in a manner to deflect the tape away from the item fastened at the point within that section, and guiding the item in a manner to cause the deflection of the tape away from the item to result in release of the item from the tape.