Articles prepared from controlled distribution block copolymers
View Patent ↗The present invention relates to articles prepared from novel anionic block copolymers of mono alkenyl arenes and conjugated dienes, and to blends of such block copolymers with other polymers. The block copolymers have mono alkenyl arene end blocks and controlled distribution blocks of mono alkenyl arenes and conjugated dienes. The block copolymer may be blended with at least one other polymer selected from the group consisting of olefin polymers, styrene polymers, amorphous resins and engineering thermoplastic resins.
1. An article comprising at least one unhydrogenated block copolymer and at least one other component selected from the group consisting of olefin polymers, polystyrene, tackifying resins, and polymer extending oils, wherein said block copolymer consists of at least one block A and at least one block B and wherein:
a. each A block is a mono alkenyl arene homopolymer block and each B block is a controlled distribution copolymer block of at least one conjugated diene and at least one mono alkenyl arene;
b. each A block having a number average molecular weight between about 3,000 and about 60,000 and each B block having a number average molecular weight between about 30,000 and about 300,000;
c. each B block comprises terminal regions adjacent to the A blocks that are rich in conjugated diene units and one or more regions not adjacent to the A blocks that are rich in mono alkenyl arene units;
d. the total amount of mono alkenyl arene in the block copolymer is about 20 percent weight to about 80 percent weight;
e. the weight percent of mono alkenyl arene in each B block is between about 17 percent and about 50 percent;
f. wherein the styrene blockiness index of the block B is less than about 10 percent; and
g. wherein about 20 to about 40 mol percent of the condensed conjugated diene units in the B block have 1,2- or 3,4-addition.
2. The article according to claim 1 wherein said mono alkenyl arene is styrene and said conjugated diene is selected from the group consisting of isoprene and butadiene.
3. The article according to claim 2 wherein said conjugated diene is butadiene.
4. The article according to claim 1 comprising 100 parts by weight of said block copolymer and about 5 to about 100 parts by weight of a polymer extending oil.
5. The article according to claim 1 comprising 100 parts by weight of said block copolymer and about 5 to about 100 parts by weight of an olefin polymer selected from the group consisting of ethylene homopolymers, ethylene/alpha olefin copolymers, propylene homopolymers, propylene/alpha olefin copolymers, high impact polypropylene, and ethylene/vinyl acetate copolymers.
6. A film formed from the formulated composition of claim 1 .
7. The article according to claim 1 also comprising an SBS or SIS copolymer.
8. The article according to claim 3 wherein the polymer is an ABA polymer and each block B has a center region with a minimum ratio of butadiene units to styrene units.
9. The article according to claim 4 wherein said polymer extending oil has a naphthenic content between 40 weight percent and 55 weight percent and an aromatic content less than 10 weight percent.
10. The article according to claim 5 also comprising about 5 to about 50 parts by weight of a tackifying resin.
11. The article according to claim 1 in the form of a fiber.
12. An article comprising at least one unsaturated block copolymer and at least one engineering thermoplastic resin, wherein said block copolymer consists of at least one block A and at least one block B and wherein:
a. each A block is a mono alkenyl arene homopolymer block and each B block is a controlled distribution copolymer block of at least one conjugated diene and at least one mono alkenyl arene;
b. each A block having a number average molecular weight between about 3,000 and about 60,000 and each B block having a number average molecular weight between about 30,000 and about 300,000;
c. each B block comprises terminal regions adjacent to the A blocks that are rich in conjugated diene units and one or more regions not adjacent to the A blocks that are rich in mono alkenyl arene units;
d. the total amount of mono alkenyl arene in the block copolymer is about 20 percent weight to about 80 percent weight;
e. the weight percent of mono alkenyl arene in each B block is between about 17 percent and about 50 percent;
f. wherein the styrene blockiness index of the block B is less than about 10 percent; and
g. wherein about 20 to about 40 mol percent of the condensed conjugated diene units in the B block have 1,2- or 3,4-addition.
13. The article according to claim 12 comprising 100 parts by weight of said block copolymer and about 5 to about 200 parts by weight of a polystyrene polymer selected from the group consisting of crystal polystyrene, high impact polystyrene, syndiotactic polystyrene, styrene/methyl-methacrylate copolymer and acrylonitrile/butadiene/styrene terpolymer.
14. The article according to claim 13 also comprising about 5 to about 50 parts by weight of a tackifying resin.
15. The article according to claim 12 comprising about 5 to 20 percent weight of said block copolymer and about 80 to about 95 percent weight of an engineering thermoplastic resin.
16. The article according to claim 15 wherein said engineering thermoplastic resin is selected from the group consisting of thermoplastic polyester, thermoplastic polyurethane, poly(arylether), poly(aryl sulfone), polycarbonate, acrylic resins, acetal resin, polyamide, halogenated thermoplastic, cyclic olefin copolymers and nitrile barrier resin.
17. The article according to claim 12 comprising about 5 to 95 percent weight of said block copolymer and about 95 to about 5 percent weight of a polystyrene homopolymer or copolymer.
18. The article according to claim 12 comprising 95 to 60 percent weight of said block copolymer and a polystyrene.
19. The article according to claim 18 wherein said polystyrene polymer is selected from the group consisting of crystal polystyrene, high impact polystyrene, syndiotactic polystyrene, styrene/methyl-methacrylate copolymer and acrylonitrile/butadiene/styrene terpolymer.
20. The article according to claim 19 wherein said polystyrene polymer is crystal polystyrene or high impact polystyrene.
21. The article according to claim 18 also comprising about 5 to about 100 parts by weight of a polymer extending oil for every 100 parts by weight of said block copolymer.
22. The article according to claim 21 in the form of a film.
23. An elastomeric laminate formed from the film of claim 22 .
24. An article comprising at least one unsaturated block copolymer and at least one engineering thermoplastic resin, wherein said block copolymer consists of at least one block A and at least one block B and wherein:
a. each A block is a mono alkenyl arene homopolymer block and each B block is a controlled distribution copolymer block of at least one conjugated diene and at least one mono alkenyl arene;
a. each A block having a number average molecular weight between about 10,000 to about 30,000 and each B block having a number average molecular weight between about 30,000 and about 150,000;
b. each B block comprises terminal regions adjacent to the A blocks that are rich in conjugated diene units and one or more regions not adjacent to the A blocks that are rich in mono alkenyl arene units;
c. the total amount of mono alkenyl arene in the block copolymer is about 35 percent weight to about 80 percent weight;
d. the weight percent of mono alkenyl arene in each B block is between about about 17 percent and about 50 percent; and
wherein the styrene blockiness index of the block B is less than about 10 percent, wherein the conjugated diene is butadiene and from about 20 to about 40 mol percent of the condensed butadiene units in the B block have 1,2-configuration, wherein said block copolymer has the general configuration ABA, (A-B) n , (A-B) n A, (A-B) n X or mixtures thereof where n is an integer from 2 to about 30, and X is the coupling agent residue.
25. The article according to claim 24 comprising 100 parts by weight of said block copolymer and about 5 to about 200 parts by weight of a polystyrene polymer selected from the group consisting of crystal polystyrene, high impact polystyrene, syndiotactic polystyrene, styrene/methyl-methacrylate copolymer and acrylonitrile/butadiene/styrene terpolymer.
26. The article according to claim 24 comprising 5 to 40 percent weight of said block copolymer and 60 to 95 percent weight of a polystyrene homopolymer or copolymer.
27. The article according to claim 26 wherein said polystyrene polymer is crystal polystyrene or high impact polystyrene.
28. The article according to claim 26 wherein said polystyrene polymer is a styrene/methyl-methacrylate copolymer.
29. The article according to claim 26 wherein said polystyrene polymer is an acrylonitrile/butadiene/styrene terpolymer.
30. An article comprising at least one unhydrogenated block copolymer and at least one other component selected from the group consisting of olefin polymers, polystyrene, tackifying resins, and polymer extending oils, wherein said block copolymer consists of at least one block A and at least one block B and wherein:
a. each A block is a mono alkenyl arene homopolymer block and each B block is a controlled distribution copolymer block of at least one conjugated diene and at least one mono alkenyl arene;
b. each A block having a number average molecular weight between about 10,000 to about 30,000 and each B block having a number average molecular weight between about 30,000 and about 300,000;
c. each B block comprises terminal regions adjacent to the A blocks that are rich in conjugated diene units and one or more regions not adjacent to the A blocks that are rich in mono alkenyl arene units;
d. the total amount of mono alkenyl arene in the block copolymer is about 20 percent weight to about 80 percent weight;
e. the weight percent of mono alkenyl arene in each B block is between about about 17 percent and about 50 percent; and
wherein the styrene blockiness index of the block B is less than about 10 percent, wherein the conjugated diene is butadiene and from about 20 to about 40 mol percent of the condensed butadiene units in the B block have 1,2-configuration, wherein said block copolymer has the general configuration ABA, (A-B) n , (A-B) n A, (A-B) n X or mixtures thereof where n is an integer from 2 to about 30, and X is the coupling agent residue.
31. A cap seal formed from a formulated composition having at least one unhydrogenated block copolymer and at least one other component selected from the group consisting of olefin polymers, polystyrene, tackifying resins, and polymer extending oils, wherein said block copolymer has at least one block A and at least one block B and wherein:
a. each A block is a mono alkenyl arene homopolymer block and each B block is a controlled distribution copolymer block of at least one conjugated diene and at least one mono alkenyl arene;
b. each A block having a number average molecular weight between about 3,000 and about 60,000 and each B block having a number average molecular weight between about 30,000 and about 300,000;
c. each B block comprises terminal regions adjacent to the A blocks that are rich in conjugated diene units and one or more regions not adjacent to the A blocks that are rich in mono alkenyl arene units;
d. the total amount of mono alkenyl arene in the block copolymer is about 20 percent weight to about 80 percent weight;
e. the weight percent of mono alkenyl arene in each B block is between about 17 percent and about 50 percent; and
f. wherein the styrene blockiness index of the block B is less than about 10 percent.
32. An article comprising 5 to 40 percent weight of at least one unhydrogenated block copolymer and 60 to 95 percent weight of a styrene-grafted polypropylene polymer, wherein said block copolymer has at least one block A and at least one block B and wherein:
a. each A block is a mono alkenyl arene homopolymer block and each B block is a controlled distribution copolymer block of at least one conjugated diene and at least one mono alkenyl arene;
b. each A block having a number average molecular weight between about 3,000 and about 60,000 and each B block having a number average molecular weight between about 30,000 and about 300,000;
c. each B block comprises terminal regions adjacent to the A blocks that are rich in conjugated diene units and one or more regions not adjacent to the A blocks that are rich in mono alkenyl arene units;
d. the total amount of mono alkenyl arene in the block copolymer is about 20 percent weight to about 80 percent weight;
e. the weight percent of mono alkenyl arene in each B block is between about 10 percent and about 75 percent; and
wherein the styrene blockiness index of the block B is less than about 10 percent, wherein said block copolymer has the general configuration ABA, (A-B) n , (A-B) n A, (A-B) n X or mixtures thereof where n is an integer from 2 to about 30, X is the coupling agent residue, each A block has a number average molecular weight of about 10,000 to about 30,000, each B block has a number average molecular weight of about 30,000 to about 150,000, and the total mono alkenyl arene amount in the block copolymer is between about 35 weight percent and about 80 weight percent.
33. A cap seal formed from a formulated composition having at least one unsaturated block copolymer and at least one engineering thermoplastic resin, wherein said block copolymer has at least one block A and at least one block B and wherein:
a. each A block is a mono alkenyl arene homopolymer block and each B block is a controlled distribution copolymer block of at least one conjugated diene and at least one mono alkenyl arene;
b. each A block having a number average molecular weight between about 3,000 and about 60,000 and each B block having a number average molecular weight between about 30,000 and about 300,000;
c. each B block comprises terminal regions adjacent to the A blocks that are rich in conjugated diene units and one or more regions not adjacent to the A blocks that are rich in mono alkenyl arene units;
d. the total amount of mono alkenyl arene in the block copolymer is about 20 percent weight to about 80 percent weight;
e. the weight percent of mono alkenyl arene in each B block is between about 17 percent and about 50 percent; and
f. wherein the styrene blockiness index of the block B is less than about 10 percent.