Process for preparing a free-flowing, modified polypropylene powder

A process for preparing a free-flowing powder comprising about 25% to about 45% of particles of a polar group-containing modified propylene polymer and about 55% to about 75% of a solvent for a film forming resin material, wherein all percentages are by weight based on the total weight of the powder, said process comprising:

• a. dissolving a polar group-containing modified propylene polymer at an elevated temperature in a solvent for the polar group-modified propylene polymer,
• b. cooling the solution to precipitate particles of the polar group-containing modified propylene polymer,
• c. replacing said solvent from said particles by contacting the particles with a liquid which is capable of removing the solvent from the particles, and
• d. collecting the particles.

A process for preparing a free-flowing powder comprising about 25% to about 45% of particles of a polar group-containing modified propylene polymer and about 55% to about 75% of a solvent for a film forming resin material, wherein all percentages are by weight based on the total weight of the powder, said process comprising:

• a. dissolving a polar group-containing modified propylene polymer at an elevated temperature in a solvent for the polar group-modified propylene polymer,
• b. cooling the solution to precipitate particles of the polar group-containing modified propylene polymer,
• c. replacing said solvent from said particles by contacting the particles with a liquid which is capable of removing the solvent therefrom, and
• d. collecting the particles,
• said step (a.) is being carried out at a temperature and concentration such that said precipitate particles have an average size of about 5 microns or less.