Microgels combined with functional additives
View Patent ↗The invention relates to a composition comprising at least one microgel and at least one functional additive, to processes for the preparation thereof, to uses of the compositions, and to microgel-containing polymers, rubbers, lubricants, coatings, etc. prepared therefrom.
1. A composition, consisting essentially of:
at least one non-crosslinkable organic medium (A), wherein said at least one non-crosslinkable organic medium (A) has a boiling point greater than 120° C. and further does not contain any groups crosslinkable by either a heteroatom-containing functional group or a carbon-carbon double bond group,
at least one powder microgel (B) comprising primary particles wherein the primary particles have an average particle size of less than 99 nm, and
at least one liquid functional additive containing at least two heteroatoms selected from the group consisting of sulphur, phosphorus, halogen, and oxygen (C), wherein said liquid functional additive is in a liquid state at ambient temperature.
2. The composition according to claim 1 , wherein the powder microgels (B) comprise fractions which are insoluble in toluene at 23° C. of at least approximately 70% by weight.
3. The composition according to claim 1 , wherein the powder microgels (B) have a swelling index of less than 80 in toluene at 23° C.
4. The composition according to claim 1 , wherein the powder microgels (B) have a glass transition temperature from −100° C. to +120° C.
5. The composition according to claim 1 , wherein the powder microgel (B) is crosslinked by means other than high-energy radiation.
6. The composition according to claim 1 , wherein the powder microgels (B) have a glass transition temperature greater than 5° C.
7. The composition according to claim 1 , wherein the powder microgels (B) are obtained by emulsion polymerization.
8. The composition according to claim 1 , wherein the powder microgel (B) is derived from rubber.
9. The composition according to claim 1 wherein the powder microgel (B) is based derived from homopolymers or random copolymers.
10. The composition according to claim 1 , wherein the powder microgel (B) is modified by functional groups reactive toward carbon-carbon double bonds.
11. The composition according to claim 1 , wherein the liquid functional additive (C) has a viscosity of less than 1,000 mPas at a temperature of 120° C.
12. The composition according to claim 1 , wherein the microgel (B) is contained in the amount of from 0.1 to 99.9% by weight of the powder microgel (B) based on the total quantity of the composition.
13. The composition according to claim 1 , further consisting essentially of at least one filler.
14. The composition according to claim 1 , wherein said composition has a viscosity from 2 mPas up to 50,000,000 mPas at a speed of rotation of 5 s −1 , determined using a cone-and-plate measuring system to DIN 53018 at 20° C.
15. The composition according to claim 1 , wherein the powder microgel (B) has a swelling index from 1 to 15 in toluene at 23° C.
16. The composition according to claim 1 , wherein the powder microgel (B) comprise fractions which are insoluble in toluene at 23° C. of at least 95% by weight.
17. The composition according to claim 1 , wherein the powder microgel (B) is not modified by hydroxyl groups.
18. The composition according to claim 1 , wherein the powder microgel (B) is not modified.
19. The composition according to claim 1 , wherein said composition is prepared by mixing the liquid functional additive (C), the powder microgel (B) and the non-crosslinkable organic medium (A) using a homogeniser, a bead mill (attrition mill), a triple roller, a single or multiple extruder screw, a kneader, an Ultra-Turrax device and/or a dissolver.
20. The composition according to claim 19 prepared using the homogeniser, the bead mill (attrition mill), the triple roller or the dissolver.
21. The composition according to claim 1 , wherein the primary particles have an approximately spherical geometry.
22. The composition according to claim 21 , wherein the deviation in the diameter of the primary particles is less than 250%, when represented by the formula
[( d 1 −d 2)/ d 2]×100%,
where d1 and d2 are two arbitrary diameters of the primary particle and d1>d2.
23. The composition according to claim 22 , wherein the deviation is less than 50%.
24. A process for preparing thermoplastic polymers, comprising:
incorporating the composition according to claim 1 into said thermoplastic polymers.
25. A process for preparing a thermoplastic elastomer, comprising:
incorporating the composition according to claim 1 into said thermoplastic elastomer.
26. A process for preparing a rubber, comprising:
incorporating the composition according to claim 1 into said rubber.