Microgels in non-crosslinkable organic media
The present invention relates to a composition containing a non-crosslinkable medium and at least one microgel, to a process for its preparation, to uses of the compositions, and to microgel-containing polymers, rubbers, lubricants, coatings, etc. produced therefrom.
1 . Composition comprising at least one non-crosslinkable organic medium (A) which has a viscosity of less than 1000 mPas at 120° C., and at least one microgel (B).
2 . Composition according to claim 1 , the microgel (B) has primary particles exhibiting approximately spherical geometry.
3 . Composition according to claim 2 , wherein the microgel (B) has a variation in diameters of an individual primary particle of the microgel (B), defined as
[( d 1− d 2)/ d 1]×100,
wherein d1 and d2 are any two diameters of the primary particle and d1>d2, is less than 250%.
4 . Composition according to claim 2 , wherein the primary particles of the microgel (B) have an average particle size of from 5 to 500 nm.
5 . Composition according to claim 1 , wherein the microgel (B) comprise at least about 70 wt. % portions that are insoluble in toluene at 23° C.
6 . Composition according to claim 1 , wherein the microgel (B) has a swelling index in toluene at 23° C. of less than about 80.
7 . Composition according to claim 1 , wherein the microgel (B) has glass transition temperatures of from −100° C. to +100° C.
8 . Composition according to claim 1 , wherein the microgel (B) is a crosslinked microgel that has not been crosslinked by means of high-energy radiation.
9 . Composition according to claim 1 , wherein the microgel (B) has a breadth of the glass transition range of greater than about 5° C.
10 . Composition according to claim 1 , wherein the microgel (B) is prepared by emulsion polymerization.
11 . Composition according to claim 1 , wherein the microgel (B) is based on rubber.
12 . Composition according to claim 1 , wherein the microgel (B) is based on homopolymers or random copolymers.
13 . Composition according to claim 1 , wherein the microgel (B) is modified by functional groups reactive towards C═C double bonds.
14 . Composition according to claim 1 , wherein the non-crosslinkable medium (A) is at least one compound selected from the group consisting of solvents, saturated or aromatic hydrocarbons, polyether oils, ester oils, polyether ester oils, phosphoric acid esters, silicon-containing oils and halogenated hydrocarbons.
15 . Composition according to claim 1 comprising from 0.5 to 90 wt. % of the microgel (B), based on the total amount of the composition.
16 . Composition according to claim 1 comprising from 10 to 99.5 wt. % of the non-crosslinkable organic medium (A).
17 . Composition according to claim 1 further comprising fillers and additives.
18 . Composition according to claim 1 prepared a homogenizer, a bead mill (agitator ball mill) or a three-roller mill.
19 . Composition according to claim 1 , wherein the composition has a viscosity at 20° C. of from 2 mPas to 5,000,000 mPas at a speed of 5 s −1 , determined by means of a cone/plate measuring system according to DIN 53018.
20 . Composition according to claim 19 , wherein the microgel (B) has a swelling index in toluene at 23° C. of from 1 to 15.
21 . Composition according to claim 1 , wherein the composition is a thermoplastic plastics, rubbers or thermoplastic elastomers.
22 . Microgel-containing polymers comprising compositions according to claim 1 .
23 . Use according to claim 22 in the production of microgel-containing rubbers.
24 . Plastics, rubbers, coating compositions or lubricants comprising the compositions according to claim 1 .
25 . Process for the preparation of the composition according to claim 1 , comprising subjecting components (A) and (B) \to treatment by means of a homogenizer, a bead mill or a three-roller mill.