Blends of microcrystalline and macrocrystalline talc for reinforcing polymers
A composition may include a first talc having a morphology index less than or equal to about 0.6 and a second talc having a morphology index greater than or equal to about 0.6. The first talc and the second talc may form a talc composition, and the talc composition may have a content ratio of the first talc to the second talc ranging from about 30:70 by weight to about 80:20 by weight. A polymer composition may include a polymer matrix and a filler composition. The filler composition may include a first talc having a morphology index less than or equal to about 0.8 and a second talc having a morphology index greater than or equal to about 0.8. The filler composition may have a content ratio of the first talc to the second talc ranging from about 30:70 by weight to about 80:20 by weight. The first talc may be a microcrystalline talc. The second talc may be a macrocrystalline talc.
1. A composition comprising:
a first talc having a morphology index less than or equal to 0.6; and
a second talc having a morphology index greater than or equal to 0.7,
wherein the first talc and the second talc form a talc composition, and
wherein the talc composition has a content ratio of the first talc to the second talc ranging from about 30:70 by weight to about 80:20 by weight.
2. The composition of claim 1 , wherein the first talc has a morphology index less than or equal to 0.5.
3. The composition of claim 1 , wherein the content ratio of the first talc to the second talc ranges from about 35:65 by weight to about 70:30 by weight.
4. The composition of claim 1 , wherein the talc composition further comprises a polyether.
5. The composition of claim 4 , wherein the polyether is polyethylene glycol.
6. The composition of claim 4 , wherein the amount of polyether ranges from about 0.1 wt % to about 0.5 wt % relative to the amount of the talc composition.
7. The composition of claim 1 , wherein the first talc has a median particle size less than or equal to about 5 microns.
8. The composition of claim 1 , wherein the first talc has a median particle size less than or equal to about 2 microns.
9. The composition of claim 1 , wherein the second talc has a median particle size less than or equal to about 10 microns.
10. The composition of claim 1 , wherein the second talc has a median particle size less than or equal to about 5 microns.
11. The composition of claim 1 , wherein the second talc has a median particle size less than or equal to about 3 microns.
12. A polymer composition comprising:
a polymer matrix; and
a filler composition, the filler composition comprising
a first talc having a morphology index less than or equal to 0.6; and
a second talc having a morphology index greater than or equal to 0.7, and
wherein the filler composition has a content ratio of the first talc to the second talc ranging from about 30:70 by weight to about 80:20 by weight.
13. The polymer composition of claim 12 , wherein the polymer matrix comprises a thermoplastic polymer.
14. The polymer composition of claim 12 , wherein the polymer matrix comprises a polyolefin polymer.
15. The polymer composition of claim 12 , wherein the polymer matrix is selected from the group consisting of polyethylene, polypropylene, polymethylpentene, polybutene-1, ethylene propylene rubber (EPR), ethylene octene elastomer, ethylene butene elastomer, and combinations thereof.
16. The polymer composition of claim 12 , wherein the filler composition further comprises a polyether.
17. The polymer composition of claim 16 , wherein the polyether is polyethylene glycol.
18. The polymer composition of claim 16 , wherein the amount of polyether ranges from about 0.1 wt % to about 5 wt % relative to the amount of the talc composition.