Plasticizer composition
View Patent ↗The invention relates to a composition containing at least one plasticizer and silicon dioxide particles having an average particle size of 150 nm or less. According to the invention, the proportion of silicon dioxide particles is from 10 to 80% by weight and the proportion of plasticizer is from 90 to 20% by weight, where the sum of the proportions of silicon dioxide particles and of the plasticizer is at least 80% by weight. The invention makes it possible to mix nanoparticles into any polymeric materials in a simple way.
1. A method of dispersing silicon dioxide particles in a polymeric material, comprising:
a) providing a plasticizer composition comprising a dispersion of silicon dioxide particles and one or more plasticizers, wherein:
i) said silicon dioxide particles have an average particle size of 150 nm or less;
ii) the proportion of silicon dioxide particles is from 10 to 80% by weight of said plasticizer composition;
iii) the proportion of said one or more plasticizers is from 90 to 20% by weight of said plasticizer composition; and
iv) the sum of the proportions of silicon dioxide particles and of said one or more plasticizers is at least 80% by weight of said plasticizer composition;
b) mixing said plasticizer composition with a polymerizable material to produce a polymeric material comprising dispersed silicon dioxide particles.
2. The method of claim 1 , wherein the sum of the proportions of silicon dioxide particles and the plasticizers in said plasticizer composition is at least 85% by weight.
3. The method of claim 1 , wherein the sum of the proportions of silicon dioxide particles and the plasticizers in said plasticizer composition is at least 90% by weight.
4. The method of claim 1 , wherein the sum of the proportions of silicon dioxide particles and the plasticizers in said plasticizer composition is at least 95% by weight.
5. The method of claim 1 , wherein the sum of the proportions of silicon dioxide particles and the plasticizers in said plasticizer composition is at least 97% by weight.
6. The method of claim 1 , wherein the sum of the proportions of silicon dioxide particles and the plasticizers in said plasticizer composition is at least 98% by weight.
7. The method of claim 1 , wherein the sum of the proportions of silicon dioxide particles and the plasticizers in said plasticizer composition is at least 99% by weight.
8. The method of claim 1 , wherein said plasticizer composition consists exclusively of plasticizers and silicon dioxide particles.
9. The method of claim 1 , wherein said plasticizer composition is solvent-free.
10. The method of claim 1 , wherein the proportion of silicon dioxide particles in said plasticizer composition is from 20 to 70% by weight.
11. The method of claim 1 , wherein the proportion of silicon dioxide particles in said plasticizer composition is from 30 to 60% by weight.
12. The method of claim 1 , wherein the proportion of silicon dioxide particles in said plasticizer composition is from 40 to 60% by weight.
13. The method of claim 1 , wherein the proportion of plasticizers in said plasticizer composition is from 30 to 80% by weight.
14. The method of claim 1 , wherein the plasticizers in said plasticizer composition is from 40 to 70% by weight.
15. The method of claim 1 , wherein the proportion of plasticizers in said plasticizer composition is from 40 to 60% by weight.
16. The method of claim 1 , wherein said silicon dioxide particles have an average particle size of from 4 to 80 nm.
17. The method of claim 1 , wherein said silicon dioxide particles have an average particle size of from 8 to 40 nm.
18. The method of claim 1 , wherein said silicon dioxide particles have an average particle size of from 10 to 30 nm.
19. The method of claim 1 , wherein said silicon dioxide particles have an average particle size of from 10 to 25 nm.
20. The method of claim 1 , wherein said silicon dioxide particles are colloidally dispersed in said plasticizer composition.
21. The method of claim 1 , wherein said at least one plasticizer is selected from the group consisting of phthalates, adipates, trimellitic esters, phosphate esters, sebacates, azelates and sulphonates.
22. The method of claim 1 , wherein said silicon dioxide particles have a surface modification to make them compatible with the plasticizer.
23. The method of claim 1 , wherein said surface modification is selected from the group consisting of silanization, alcoholysis and physically adhering polymers.
24. The method of claim 1 , wherein said polymeric material is a thermoplastic material or a PVC material.
25. The method of claim 1 , wherein said polymeric material is an elastomer or a rubber.
26. The method of claim 25 , wherein said polymeric material is a natural rubber or silicone rubber.
27. The method of claim 1 , wherein the proportion of silicon dioxide particles in said polymeric material is from 1 to 50% by weight.
28. The method of claim 1 , wherein the proportion of silicon dioxide particles in said polymeric material is from 1 to 30% by weight.
29. The method of claim 1 , wherein the proportion of silicon dioxide particles in said polymeric material is from 1 to 20% by weight.
30. The method of claim 1 , wherein the proportion of silicon dioxide particles in said polymeric material is from 1 to 10% by weight.
31. The method of claim 1 , wherein the proportion of silicon dioxide particles in said polymeric material is from 2 to 6% by weight.