Patent ID: 7217747

Claim:
A plastics additives powder composition providing a combination of impact modifying and processing characteristics in thermoplastic resins, the composition comprising powder particles comprising: (a) from 50 to 98 parts by weight of impact modifier particles, the impact modifier particles comprising 80 to 100 parts by weight of at least one rubbery polymer and having a mean particle size greater than 100 nm; (b) from 0 to 48 parts by weight of first processing aid particles; and (c) from 2 to 50 parts by weight of second processing aid particles having a molecular weight of at least 1,000,000 g/mol, wherein the composition of the second processing aid particles is the same as, or different than, the composition of the first processing aid particles, wherein the total parts by weight of the impact modifier particles, the first processing aid particles, and the second processing aid particles is equal to 100; wherein the powder particle comprises a powder particle inner region and a powder particle outer region; wherein the powder particle inner region comprises the impact modifier particles and the first processing aid particles; wherein the powder particle outer region surrounds the powder particle inner region; and wherein the powder particle outer region comprises the second processing aid particles.