Patent ID: 7871636

Claim:
A flowable, aqueous concentrate composition containing i. 50 to 500 g/l of pendimethalin as microencapsulated pendimethalin particles a) and wherein the microencapsulated pendimethalin is encapsulated by a polymeric wall material which is selected from the group consisting of polyurea and polyurethane, and wherein the polymeric wall material is water insoluble, ii. 50 to 500 g/l of non-encapsulated pendimethalin particles b), iii. 5 to 100 g/l of at least one anionic oligomeric or polymeric surface-active substance A which is an anionic oligomer or polymer, which contains a plurality of anionic groups, iv. 5 to 200 g/l of at least one anionic surface-active compound of the formula I R—(O-A) m -O—X wherein R is a hydrocarbon radical having from 8 to 40 carbon atoms and optionally one oxygen atom, A is 1,2-ethylene, 1,2-propylene or 1,3-propylene, m is from 3 to 200 and X is SO 3 M or PO 3 M 2 with M being selected from the group consisting of H, alkaline metal, alkaline earth metal and ammonium, v. 5 to 50 g/l of at least one nonionic surface-active compound of the formula II R 1 —(O—B) n —OH wherein R 1 is a hydrocarbon radical having from 8 to 40 carbon atoms and optionally one oxygen atom, B is 1,2-ethylene, 1-2-propylene or 1,3-propylene and n is from 5 to 200, vi. 10 to 200 g/l of at least one water-soluble inorganic salt, and wherein the weight ratio of the microencapsulated pendimethalin particles to non-encapsulated pendimethalin particles is from 1:9 to 9:1.