Oligomerization of alpha olefins using metallocene-SSA catalyst systems and use of the resultant polyalphaolefins to prepare lubricant blends

1. A composition comprising a polyalphaolefin, the polyalphaolefin being produced from a C 6 to C 16 normal alpha olefin comprising at least 82.5 weight percent of a C 8 normal alpha olefin, the polyalphaolefin comprising:

a) less than 1 weight % saturated alpha olefin monomer;

b) less than 3 weight % saturated dimers; and

c) greater than 80 weight % saturated higher oligomers

and having

i) a 100° C. kinematic viscosity of at least 25 cSt;

ii) a viscosity index greater than 160;

iii) a pour point less than −35° C.; and

iv) no discernable crystallization as determined by differential scanning calorimetry using ASTM D 3418.

2. The composition of claim 1 , wherein the polyalphaolefin comprises:

a) less than 0.5 weight % saturated alpha olefin monomer;

b) less than 1 weight % saturated dimers; and

c) at least 88 weight % saturated higher oligomers.

3. The composition of claim 1 , wherein the polyalphaolefin has a kinematic viscosity from 25 cSt to 225 cSt.

4. The composition of claim 1 , wherein the polyalphaolefin has RPVOT as measured by ASTM D2272 in the presence of 0.5 weight % of an antioxidant of at least 2,000, wherein the antioxidant contains at least 90 weight % N-(dodecylphenyl)naphthalen-1-amine and from greater than 5 weight % to less than 10 weight % N-1-naphthylaniline.

5. The composition of claim 1 , wherein the C 6 to C 16 normal alpha olefin comprises at least 90 weight percent of the C 8 normal alpha olefin.

6. The composition of claim 5 , wherein the polyalphaolefin comprises:

a) less than 0.5 weight % saturated alpha olefin monomer;

b) less than 1 weight % saturated dimers; and

c) at least 88 weight % saturated higher oligomers;

and wherein

i) the 100° C. kinematic viscosity ranges from 30 cSt to 50 cSt;

ii) the viscosity index is greater than 160; and

iii) the pour point is less than −40° C.

7. The composition of claim 5 , wherein the polyalphaolefin comprises:

a) less than 0.5 weight % saturated alpha olefin monomer;

b) less than 1 weight % saturated dimers; and

c) at least 88 weight % saturated higher oligomers; and

and wherein

i) the 100° C. kinematic viscosity ranges from 80 cSt to 140 cSt;

ii) the viscosity index is greater than 160; and

iii) the pour point is less than −35° C.

8. The composition of claim 5 , wherein the polyalphaolefin has a Bernoulli index less than 1.65.

9. A composition comprising a polyalphaolefin, the polyalphaolefin being produced from a C 6 to C 16 normal alpha olefin comprising at least 80 weight percent of a C 8 normal alpha olefin, the polyalphaolefin comprising:

a) less than 1 weight % saturated alpha olefin monomer;

b) less than 3 weight % saturated dimers; and

c) greater than 80 weight % saturated higher oligomers

and having

i) a 100° C. kinematic viscosity of at least 25 cSt;

ii) a viscosity index greater than 150; and

iii) a pour point less than 0° C.; and

iv. a Bernoulli index less than 1.65.

10. A composition comprising an alpha olefin oligomer product, the alpha olefin oligomer product being produced from a C 6 to C 16 normal alpha olefin comprising at least 90 weight percent of a C 8 normal alpha olefin, the alpha olefin oligomer product comprising:

a) less than 1 weight % residual alpha olefin monomer;

b) less than 3 weight % dimers; and

c) greater than 80 weight % higher oligomers;

and having

i) a 100° C. kinematic viscosity of at least 25 cSt; and

ii) a viscosity index greater than 170.

11. The composition of claim 10 , wherein the alpha olefin oligomer product comprises:

a) less than 0.5 weight % residual alpha olefin monomer;

b) less than 1 weight % dimers; and

c) greater than 88 weight % higher oligomers; and

wherein the alpha olefin oligomer product has

i) a 100° C. kinematic viscosity from 30 cSt to 50 cSt; and

ii) a viscosity index greater than 170.

12. The composition of claim 10 , wherein the alpha olefin oligomer product comprises:

a) less than 0.5 weight % residual alpha olefin monomer;

b) less than 1 weight % dimers; and

c) greater than 80 weight % higher oligomers;

and having

i) a 100° C. kinematic viscosity from 80 cSt to 140 cSt; and

ii) a viscosity index greater than 175.

13. The composition of claim 9 , wherein the polyalphaolefin has no discernible crystallization as determined by differential scanning calorimetry using ASTM D 3418.

14. The composition of claim 9 , wherein:

i) the 100° C. kinematic viscosity ranges from 40 cSt to 80 cSt;

ii) the viscosity index ranges from 170 to 220; and

iii) the pour point ranges from −30° C. to −90° C.

15. The composition of claim 9 , wherein:

i) the 100° C. kinematic viscosity ranges from 80 cSt to 120 cSt;

ii) the viscosity index ranges from 170 to 220; and

iii) the pour point ranges from −30° C. to −90° C.

16. The composition of claim 9 , wherein:

i) the 100° C. kinematic viscosity ranges from 130 cSt to 170 cSt;

ii) the viscosity index ranges from 170 to 220; and

iii) the pour point ranges from −30° C. to −90° C.

17. The composition of claim 10 , wherein:

i) the 100° C. kinematic viscosity ranges from 40 cSt to 80 cSt; and

ii) the viscosity index ranges from 175 to 220.

18. The composition of claim 10 , wherein:

i) the 100° C. kinematic viscosity ranges from 80 cSt to 120 cSt; and

ii) the viscosity index ranges from 175 to 220.

19. The composition of claim 10 , wherein:

i) the 100° C. kinematic viscosity ranges from 130 cSt to 170 cSt; and

ii) the viscosity index ranges from 175 to 220.