Nanoemulsions and processes for their preparation, and their use as formulations of plant protection agents and/or pesticides and/or cosmetic preparations

A process for preparing a nanoemulsion comprising:

• providing or obtaining a microemulsion comprising:
• at least one pseudo-cosmotropic substance which is sparingly soluble in water or insoluble in water, and which lowers a temperature of at least one phase boundary of the microemulsion to a lower level as compared to the microemulsion without the at least one pseudo-cosmotropic substance;
• and
• at least one oil spreader as an adjuvant, wherein the oil spreader is an organo-modified polysiloxane of the general formula (1):
• where:
• z=independently of one another 0 or 1;
• x=0 to 200;
• y=0 to 100;
• R′=R or an alkyl radical;
• R=(CH2)n—(O)o—(C2H4O)p(C3H6O)q(C2H3LO)r—K and/or CmH2m+1;
• n=0, 3, 4 or 6;
• o=0 or 1;
• m=1 to 40;
• p=0 to 50;
• q=0 to 50;
• r=0 to 50;
• L=ethyl or phenyl;
• and
• K is H, an alkyl radical having 4 or fewer carbon atoms, or is an acetyl group;
• with the proviso that formula (1) must comprise at least one group R;
• and
• diluting the microemulsion with water in a ratio of 1:20 to 1:10,000, based on parts by weight, to obtain the nanoemulsion;
• wherein the nanoemulsion is storage stable and has an average particle size distribution in the range of from 10-200 nm for at least 48 hours at 40° C.;
• and
• wherein the at least one pseudo-cosmotropic substance includes at least one substance selected from the group consisting of pesticidal actives.