CONTAINER CLOSURE WITH A SEALING ELEMENT

Abstract

A vessel closure (1, 21, 41, 61) includes a sealing element (3, 23, 43, 63). The sealing element (3, 23, 43, 63) includes a polymer composition. The polymer composition includes a polyalphaolefin with kinematic viscosity, determined according to ASTM D445 / ISO 3104, of at least 4 cSt, at a temperature of 100° C., and/or a dropping point, determined according to ASTM 5950, of at most -10° C., and up to 95% by weight of a second polyolefin.

Claims

1. Vessel closure (1, 21, 41, 61) with a sealing element (3, 23, 43, 63), whereby the sealing element (3, 23, 43, 63) includes a polymer composition and the polymer composition includes... (a) a polyalphaolefin with a kinematic viscosity, determined according to ASTM D445 / ISO 3104, of at least 4 cSt, at a temperature of 100° C., and/or with a dropping point, determined according to ASTM 5950, of at most -10° C.; and (b) up to 95% by weight of a second polyolefin.

2. Vessel closure according to claim 1, whereby the polyalphaolefin has a kinematic viscosity at a temperature of 100° C., determined according to ASTM D445 / ISO 3104, between 4 cSt and 1500 cSt, preferably between 50 cSt and 1000 cSt, more preferably between 120 cSt and 1000 cSt, even more preferably between 250 cSt and 1000 cSt.

3. Vessel closure according to any one of the preceding claims, whereby the polyalphaolefin has a dropping point, determined according to ASTM 5950, of at most -20° C., preferably of at most -30° C.

4. Vessel closure according to any one of the preceding claims, whereby the polyalphaolefin has a density, determined according to ASTM D4052, of up to 0.860 g cm.sup.-3, in particular between 0.825 g cm.sup.-3 and 0.855 g cm.sup.-3.

5. Vessel closure according to any one of the preceding claims, whereby the polyalphaolefin has an average molecular weight M.sub.w, determined according to DIN 55672-1, of at least 440 Da, preferably between 440 Da and 12000 Da, particularly preferably between 1000 Da and 10000 Da, still more preferably between 3000 Da and 10000 Da.

6. Vessel closure according to any one of the preceding claims, whereby the polyalphaolefin is a metallocene polyalphaolefin - in particular, the polyalphaolefin has been prepared using a metallocene catalyst.

7. Vessel closure according to any one of the preceding claims, whereby the polyalphaolefin is a homopolymer or a copolymer - in particular, the polyalphaolefin includes a C.sub.3 to C.sub.22 alpha-olefin as a (co)monomer.

8. Vessel closure according to the preceding claim, whereby the polyalphaolefin includes a C.sub.6 to C.sub.14 alpha-olefin, preferably a C.sub.8 bis C.sub.10 alpha-olefin, as a (co)monomer.

9. Vessel closure according to any one of the preceding claims, whereby the polyalphaolefin is present in the polymer composition at a level of up to 65% by weight, preferably between 3% and 65% by weight, more preferably between 3% and 50% by weight, even more preferably between 3% and 30% by weight, most preferably between 5% and 30% by weight.

10. Vessel closure according to one of the preceding claims, whereby the second polyolefin has a Shore A hardness, determined according to DIN ISO 7619-1 at 23° C., of at most 90, in particular between 30 and 90.

11. Vessel closure according to any one of the preceding claims, whereby the second polyolefin is a plastomer or an elastomer - in particular, the second polyolefin is a polyolefin elastomer with a density, determined according to DIN EN ISO 1183-1, of less than 0.860 g cm.sup.-3, or the second polyolefin is a polyolefin plastomer with a density, determined according to DIN EN ISO 1183-1, between 0.860 g cm.sup.-3 and 0.910 g cm.sup.-3.

12. Vessel closure according to any one of the preceding claims, whereby the second polyolefin is a (random) copolymer; preferably, the copolymer includes alpha-butene and a C2, C3 or C5 to C16 (alpha-)olefin as comonomers; more preferably, the copolymer includes alpha-butene in an amount of more than 50 mol% as a comonomer.

13. Vessel closure according to any one of the preceding claims, whereby the second polyolefin is a (random) copolymer; preferably, the copolymer includes propene and a C.sub.2, C.sub.4 or C.sub.5 to C.sub.16 (alpha-)olefin as comonomers; more preferably, the copolymer includes propene in a proportion of more than 50 mol% as a comonomer.

14. Vessel closure according to any one of the preceding claims, whereby the second polyolefin is a (random or block) copolymer; preferably, the copolymer includes ethene and a C.sub.5 to C.sub.16 (alpha-)olefin as comonomers; more preferably, the copolymer includes ethene and a C.sub.5 C.sub.7, C.sub.9 or C.sub.10 to C.sub.16 (alpha-)olefin as comonomers; still more preferably, the copolymer includes ethene in a proportion of more than 50 mol% as a comonomer.

15. Vessel closure according to any one of the preceding claims, whereby the second polyolefin is present in the polymer composition in a proportion of at most 80% by weight, preferably at most 70% by weight, or between 5% and 95% by weight, preferably between 20% and 95% by weight, more preferably between 50% and 95% by weight.

16. Vessel closure according to any one of the preceding claims, whereby the polymer composition includes a third polymer, in particular a third polyolefin.

17. Vessel closure according to claim 16, whereby the third polymer has a Shore D hardness, determined according to DIN ISO 7619-1 at 23° C., of at most 60, in particular between 20 and 60.

18. Vessel closure according to claim 16 or 17, whereby the third polymer is a homopolymer - in particular, the homopolymer is composed of a C.sub.2 to C.sub.12 (alpha)olefin, preferably of a C.sub.2 to C.sub.8 (alpha-)olefin, particularly preferably of a C.sub.2 to C.sub.6 (alpha-)olefin.

19. Vessel closure according to claim 18, whereby the homopolymer is a polyethylene homopolymer, a polypropylene homopolymer, in particular a syndiotactic polypropylene homopolymer, or an alpha-butene homopolymer.

20. Vessel closure according to claim 16 or 17, whereby the third polymer is a copolymer - in particular, the copolymer comprises at least one or at least two C.sub.2 to C.sub.12 (alpha)olefins as comonomers, preferably at least one or at least two C.sub.2 to C.sub.8 (alpha)olefins as comonomers, particularly preferably at least one or at least two CC.sub.2 to C.sub.6 (alpha-)olefins as comonomers.

21. Vessel closure according to claim 20, whereby the copolymer is a propene-ethylene copolymer, in particular with a propene content of more than 50 mol%, or a propene-hexene copolymer, in particular with a propene content of more than 50 mol%.

22. Vessel closure according to any one of claims 16 to 21, whereby the third polymer is present in the polymer composition at a level of at most 35% by weight, preferably between 5% and 35% by weight, more preferably between 5% and 27% by weight, even more preferably between 5% and 18% by weight, most preferably between 11% and 18% by weight.

23. Vessel closure according to any one of the preceding claims, whereby the polymer composition includes a fourth polymer, in particular a fourth polyolefin.

24. Vessel closure according to claim 23, whereby the fourth polymer has a Shore D hardness, determined according to DIN ISO 7619-1 at 23° C., of at most 60, in particular between 20 and 60.

25. Vessel closure according to claim 23 or 24, whereby the fourth polymer is a homopolymer — in particular, the homopolymer is composed of a C.sub.2 to C.sub.12 (alpha)olefin, preferably of a C.sub.2 to C.sub.8 (alpha-)olefin, particularly preferably of a C.sub.2 to C.sub.6 (alpha-)olefin.

26. Vessel closure according to claim 25, whereby the homopolymer is a polyethylene homopolymer, a polypropylene homopolymer, in particular a syndiotactic polypropylene homopolymer, or a poly-alpha-butene homopolymer.

27. Vessel closure according to claim 23 or 24, whereby the fourth polymer is a copolymer - in particular, the copolymer includes at least one or at least two C.sub.2 to C.sub.12 (alpha-)olefins as comonomers, preferably at least one or at least two C.sub.2 to C.sub.8 (alpha-)olefins as comonomers, particularly preferably at least one or at least two C.sub.2 to C.sub.6 (alpha-)olefins as comonomers.

28. Vessel closure according to claim 27, whereby the copolymer is a propene-ethylene copolymer, in particular with a propene content of more than 50 mol%, or a propene-hexene copolymer, in particular with a propene content of more than 50 mol%.

29. Vessel closure according to any one of claims 23 to 28, whereby the fourth polymer is present at a level of at most 35% by weight, preferably between 5% and 35% by weight, more preferably between 5% and 27% by weight, even more preferably between 5% and 18% by weight, most preferably between 11% and 18% by weight.

30. Vessel closure according to any one of the preceding claims, whereby the polymer composition included is up to 15% by weight, preferably up to 8% by weight, more preferably up to 6% by weight, most preferably up to 5% by weight, of additives.

31. Vessel closure according to the preceding claim, whereby the additives are selected from the group consisting of: pigments, nucleating agents, brighteners, stabilisers, surfactants, lubricants, antioxidants and combinations thereof.

32. Vessel closure according to any one of the preceding claims, whereby the polymer composition has an oxygen transmission rate, determined according to DIN 53380, of less than 1300 cm.sup.3 m.sup.-2 d.sup.-1 bar.sup.-1, preferably of less than 900 cm.sup.3 m.sup.-2 d.sup.-1 bar.sup.-1, more preferably of less than 750 cm.sup.3 m.sup.-2 d.sup.-1 bar.sup.-1.

33. Vessel closure according to any one of the preceding claims, whereby the polymer composition has a total migration, determined according to DIN-EN 1186-14, of at most 5.5 mg cm.sup.-2, preferably at most 3.5 mg cm.sup.-2, particularly preferably at most 2.5 mg cm.sup.-2, most preferably no more than 1.5 mg cm.sup.-2.

34. Vessel (5, 25, 45) with a vessel mouth (5a, 25a, 45a) and a closable opening at the end of the vessel mouth, whereby the opening is closed with a vessel closure (1, 21, 41, 61) according to any one of the preceding claims.

35. Vessel according to claim 34, whereby the vessel closure includes a carrier (11, 31, 51, 71) and the sealing element (3, 23, 43, 63) and whereby the sealing element between an upper end (4, 24, 44) of the vessel mouth and a lower side of the carrier (11, 31, 51, 71) has a height (h.sub.3) of at most 1.0 mm, preferably at most 0.8 mm, particularly preferably at most 0.7 mm, in the axial direction of the vessel.

36. Vessel according to any one of claims 34 or 35, whereby the vessel closure includes a carrier (11, 31, 51, 71) and the sealing element (3, 23, 43, 63) and whereby the sealing element has a height (h.sub.3) between an upper end (4, 24, 44) of the vessel mouth and a lower side of the carrier (11, 31, 51, 71) of at least 0.2 mm, preferably at least 0.4 mm, particularly preferably at least 0.5 mm, in the axial direction of the vessel.

37. Vessel according to any one of claims 34 to 36, whereby the vessel has a safety dimension of at most 10 mm, preferably no more than 8 mm, particularly preferably at most 6 mm, most preferably at most 4 mm.

38. A method for producing a sealed and filled vessel with the following steps: (a) Provision of a vessel (1, 21, 41, 61) with a vessel mouth (5a, 25a, 45a) and a closable opening at the end of the vessel mouth; (b) Filling of the vessel with a foodstuff through the opening of the vessel; (c) Closing of the opening of the vessel with a vessel closure according to any one of claims 1 to 33.

39. The method of claim 38, whereby the vessel closure is treated at a temperature of at least 90° C. before the opening of the vessel is closed with the vessel closure.

40. A method according to any one of claims 38 or 39, whereby the absolute pressure in the sealed and filled vessel is at most 200 hPa, preferably at most 100 hPa.

41. A method according to any one of claims 38 to 40, whereby the sealing element of the vessel closure is deformed by at least 0.2 mm, preferably at least 0.4 mm, particularly preferably at least 0.5 mm, in the axial direction of the vessel during closure of the opening of the vessel with the vessel closure and/or thermal treatment of the closed and filled vessel for forming an impression of the vessel mouth into the sealing element.

42. A method according to any one of claims 38 to 41, whereby the sealing element of the vessel closure is deformed by at most 1.0 mm, preferably at most 0.8 mm, particularly preferably at most 0.7 mm, in the axial direction of the vessel during closure of the opening of the vessel with the vessel closure and/or thermal treatment of the closed and filled vessel to form an impression of the vessel mouth in the sealing element.

43. Vessel closure according to any one of claims 16 to 33, whereby the third polymer is a polypropylene copolymer, in particular a syndiotactic polypropylene copolymer.

44. Vessel closure according to any one of claims 23 to 33, whereby the fourth polymer is a polypropylene copolymer, in particular a syndiotactic polypropylene copolymer.

Description

[0111] FIG. 1 shows a side view of a cam screw closure 1 with an annular sealing element 3, in part as a sectional view;

[0112] FIG. 2 shows a side view of cam screw rotary closure 1 with sealing element 3 on a vessel 5, in part as a sectional view;

[0113] FIG. 3 shows cam screw closure 1 with sealing element 3 in a bottom view;

[0114] FIG. 4 shows an isometric view of a composite closure 61 (Combi-Twist);

[0115] FIG. 5 shows a partial axial section of the composite closure 61 (Combi-Twist) of FIG. 4;

[0116] FIG. 6 shows a side view of a press-on twist-off closure 21 (PT closure) with a sealing element 23, in part as a sectional view;

[0117] FIG. 7 shows a side view of PT closure 21 with sealing element 23 on a vessel 25, in part as a sectional view;

[0118] FIG. 8 shows a top view of PT closure 21;

[0119] FIG. 9 shows a side view of a composite fastener 41 (band guard) with a sealing element 43, in part as a sectional view;

[0120] FIG. 10 shows a side view of the composite closure 41 (band guard) with sealing element 43 on a vessel 45, in part as a sectional view;

[0121] FIG. 11 shows a top view of composite fastener 41 (band guard);

[0122] FIG. 12 shows an enlarged section of the cam screw closure of FIG. 2.

[0123] FIGS. 1 and 3 show a cam screw closure 1. Cam screw closure 1 includes a metallic support 11 and a sealing element 3. In the illustration of FIG. 2, cam screw closure 1 is applied to a vessel 5. A curl 9 is formed at the lower end of cam screw closure 1. Several cams 7 are formed circumferentially distributed from curl 9. Cams 7 are formed by an axial deformation of curl 9 and extend radially further toward the center of the cam screw closure 1 than curl 9. Cam screw closure 1 shown in FIGS. 1 to 3 includes four cams 7, which are evenly distributed around the circumference. The sections shown in part in FIGS. 1 and 2 correspond to section III-III in FIG. 3.

[0124] A channel 2 is formed in upper section 10 of carrier 11 near the radially outer end section of cam screw closure 1. Sealing element 3 is at least partially positioned in channel 2. In this embodiment, sealing element 3 is annular; in other embodiments, sealing element 3 may be disc-shaped, particularly if the diameter of the cam screw closure is small (e.g. at most 30 mm).

[0125] To mediate adhesion between metallic carrier 11 and sealing element 3, an adhesive lacquer is typically applied to the side of metallic carrier 11 that is in contact with sealing element 3.

[0126] In FIG. 2, cam screw closure 1 is applied to a vessel 5. Vessel 5 includes a vessel mouth 5a as the upper portion of vessel 5. The vessel mouth includes a thread 6 and an upper end 4 of vessel mouth 5a. Thread 6 is formed circumferentially in the area of vessel mouth 5a and extends circumferentially upwards or downwards (depending on the angle of view).

[0127] To apply cam screw closure 1 to a vessel 5, cams 7 are brought into contact with sections of thread 6, and cam screw closure 1 is rotated clockwise relative to vessel 5. Due to the configuration of thread 6 and the interaction of cams 7 with thread 6, upper end 4 of vessel mouth 5a moves toward sealing element 3 during the rotational movement of cam screw closure 1 relative to vessel 5. A further rotational movement of cam screw closure 1 causes upper end 4 of vessel mouth 5a to press into and deform sealing element 3 so that a portion of upper end 4 of vessel mouth 5a is covered by sealing element 3, thereby closing vessel 5 tightly. In particular, a tight closure of vessel 5 is necessary to withstand increased pressure during thermal treatment of closed vessel 5 at temperatures above 70° C., 90° C. or even above 120° C.

[0128] As shown in FIGS. 1 to 3, cam screw closure 1 includes a safety button 10b formed in upper portion 10 of carrier 11. Due to slope 10a in upper section 10 of carrier 11, safety button 10b tips toward the center of the vessel when there is a sufficiently large negative pressure in the vessel. Such a vacuum can be created by introducing water vapor into the vessel before closing the vessel with the closure.

[0129] If a consumer opens the vessel by removing the vessel closure, the pressure in the vessel rises to ambient pressure and safety button 10b tips away from the center of the vessel. The tipping of safety button 10b is accompanied by a characteristic sound, by which a consumer can recognise that there was a vacuum in the vessel before it was opened.

[0130] FIGS. 4 and 5 show a composite closure 61 (Combi-Twist) which, similar to cam screw closure 1 described above, can be attached to a vessel by a twisting motion and removed from the vessel via a twisting motion.

[0131] Composite fastener 61 includes a carrier with an upper metallic section 71 and a plastic section 72 in an L-shape. A channel 78 is formed near the radial end of metallic section 71 of the carrier and a curl 77 is formed at the radial end of metallic section 71. A sealing element is at least partially positioned in channel 78.

[0132] Several threaded elements 74a, 74b formed on the inside of plastic section 72 make contact with a mating thread in the region of the mouth of a vessel (not shown) to which composite closure 61 is to be attached. Furthermore, plastic section 72 of composite closure 61 includes a tamper-evident closure 73, which is similar in design to the tamper-evident closure shown in FIGS. 9 to 11 and is described in more detail with reference to FIGS. 9 to 11.

[0133] If composite closure 61 is screwed onto a vessel by a twisting motion, a similar interaction of the vessel mouth of the vessel with the sealing element of composite closure 61 results as described for cam screw closure 1.

[0134] FIGS. 6 to 8 show a press-on twist-off closure 21 (PT closure). PT fastener 21 includes a metallic carrier 31 with a curl 29 at the lower end of carrier 31 and a safety button 30a in upper section 30 of carrier 31.

[0135] A sealing element 23 is formed both in the region of upper section 30 of carrier 31 and to a considerable extent on the apron of the beam, which extends downward from upper section 30 of carrier 31. PT closure 21, unlike cam screw closure 1 and composite closure 61, is pressed onto vessel mouth 25a when applied to a vessel 25. While pressing onto vessel mouth 25a, sealing element 23 is sufficiently soft to elastically enclose threaded elements 26 of vessel mouth 25a. Typically for this purpose, sealing element 23 is treated with steam before PT closure 21 is attached to a vessel 5 to cause the necessary softness of sealing element 23. After sealing element 23 has cooled, a mating thread in the form of an inverse of threaded elements 26 of the vessel mouth is formed in sealing element 23.

[0136] An upper end 24 of vessel mouth 25a comes in contact with sealing element 23.

[0137] To open receptacle 25, PT closure 21 is removed from receptacle 25 by a twisting motion.

[0138] FIGS. 9 to 11 show a composite closure 41 (band guard) that works similar to PT closure 21 described above.

[0139] Composite closure 41 includes a carrier with a metallic section 51 and a plastic section 52, a tamper-evident closure 53 and a safety button 50a. Tamper-evident closure 53 is configured to be removed from remaining composite closure 41 when composite closure 41 is removed from a vessel 45 and serves to allow a consumer to verify that composite closure 41 has already been removed from vessel 45. Safety button 50a is designed and works similarly to safety button 10b of cam screw closure 1.

[0140] The plastic portion of composite closure 41 may include multiple axially extending indentations 56 to increase the stability of the closure.

[0141] A sealing element 43 is arranged in composite closure 41 so that it comes into contact with both metallic section 51 and plastic section 52. To close a vessel 45, composite closure 41 is pressed onto vessel mouth 45a of vessel 45 so that at least upper end 44 of vessel mouth 45a comes into contact with sealing element 43.

[0142] Plastic section 52 of the carrier includes multiple offset projections 54 that interact with threaded elements 46 of vessel mouth 45a. To open a vessel 45 closed by composite closure 41, composite closure 41 may be rotated relative to vessel 45.

[0143] Distance h.sub.3 of a sealing element 3 between an upper end 4 of a vessel mouth 5a of a vessel 5 and the lower side of a support 11 of closure 1 is shown in FIG. 12, looking toward a cam screw closure 1, and described herein. Similarly, the distance (height) h.sub.3 must be determined for other closure types as well.

[0144] Sealing element 3 clamped between vessel mouth 5 and support 11 of vessel closure 1 has a height h.sub.3 given when a vessel 5 is closed with closure 1. If height h.sub.3 is too low, there is a risk of sealing element 3 being cut through, which may impair the tightness of sealed vessel 5. If height h.sub.3 is too large, the tightness of the sealed vessel is impaired because the contact surface between upper end 4 of vessel mouth 5a and sealing element 3 is not sufficiently large. In order to achieve a suitable impression of upper end 4 of vessel mouth 5a into the sealing element, the composition of sealing element 3 is decisive.

Examples

[0145] Examples of polymer compositions for sealing elements in a vessel closure are shown in Tables 1, 2 and 3. The examples are labelled with Ex. and a consecutive number for the respective example.

[0146] The component designations shown in the tables stand for ... [0147] PAO-5 Polyalphaolefin with a kinematic viscosity of about 5 cSt at 100° C., [0148] PAO-65 Polyalphaolefin with a kinematic viscosity of about 65 cSt at 100° C., [0149] PAO-150 Polyalphaolefin with a kinematic viscosity of about 150 cSt at 100° C., [0150] PAO-300 Polyalphaolefin with a kinematic viscosity of about 300 cSt at 100° C., [0151] C4C2 Alpha-butene-ethylene copolymer with an alpha-butene content of more than 50 mol%, [0152] C4C3 Alpha-butene-ethylene copolymer with an alpha-butene content of more than 50 mol%, [0153] C2 Ethene homopolymer (LDPE), [0154] C3C2 Propene-ethene copolymer with a propene content of more than 50 mol%, [0155] C3C6 Propene-alpha-hexene copolymer with a propene content of more than 50 mol%, [0156] C4 Alpha-butene homopolymer.

[0157] The polyalphaolefins (PAO-5, PAO-65, PAO-150, PAO-300) are commercially available from Chevron Phillips or from ExxonMobil (e.g. SpectraSyn series).

[0158] The alpha-butene-ethylene copolymer has a Shore A hardness of 60 and a density of 0.870 g cm.sup.-3.

[0159] The alpha-butene-propene copolymer has a Shore A hardness of 87 and a density of 0.890 g cm.sup.-3.

[0160] The ethene homopolymer exhibits a Shore D hardness of 48 and a density of 0.928 g cm.sup.-3.

[0161] The density of the propene-ethylene copolymer is 0.900 g cm.sup.-3.

[0162] The propene-alpha-hexene copolymer exhibits a density of 0.900 g cm.sup.-3.

[0163] The alpha-butene homopolymer has a Shore D hardness of 54.

TABLE-US-00001 Ex. 1 Ex. 2 Ex. 3 Ex. 4 Ex. 5 Ex. 6 Ex. 7 Component, % by weight PAO-5 4.8 9.1 16.7 9.1 PAO-65 9.1 PAO-150 9.1 PAO-300 9.1 C4C2 68.5 65.4 59.9 65.4 65.4 65.4 C4C3 87.2 C2 15.2 14.5 13.3 14.5 14.5 14.5 C3C2 7.6 7.3 6.7 7.3 7.3 7.3 C3C6 C4 Additive 3.9 3.7 3.4 3.7 3.7 3.7 3.7 Property Coefficient of friction, dimensionless 0.31 0.33 0.39 0.36 0.23 0.18 0.28 Total migration, mg cm.sup.-2 2.14 3.27 5.11 1.35 1.15 0.99 2.90 Oxygen transmission rate cm.sup.3 m.sup.-2 d.sup.-1 bar.sup.-1 662 809 1162 732 681 650 680

TABLE-US-00002 Ex. 8 Ex. 9 Ex. 10 Ex. 11 Ex. 12 Ex. 13 Ex. 14 Ex. 15 Ex. 16 Component % by weight PAO-300 20.0 30.0 40.0 5.0 10.0 20.0 10.0 10.0 10.0 C4C2 90.9 85.9 75.9 61.9 61.9 61.9 C4C3 75.9 65.9 55.9 C2 24.0 C3C6 24.0 C4 24.0 Additive % by weight 4.1 4.1 4.1 4.1 4.1 4.1 4.1 4.1 4.1

TABLE-US-00003 Ex. 17 Ex. 18 Ex. 19 Ex. 20 Ex. 21 Ex. 22 Ex. 23 Ex. 24 Component % by weight PAO-5 9.1 16.7 9.1 16.7 PAO-300 5.0 10.0 30.0 40.0 C4C2 65.4 59.9 65.4 59.9 65.9 55.9 C4C3 90.9 85.9 C2 14.5 13.3 14.5 13.3 C3C6 7.3 6.7 C4 7.3 6.7 Additive % by weight 3.7 3.4 3.7 3.4 4.1 4.1 4.1 4.1

[0164] Generally, no specific component is necessarily present in any of the polymer compositions or the polymer composition. Specifically, an increased occurrence of a component in the examples is not an indication that this component must necessarily be included in the polymer composition. Instead, components can be omitted from the compositions of the examples or replaced by other component(s). Components may also be added.