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The present invention is directed to a viscosity index improver for lubricating oil compositions comprising the reaction product of A a copolymer of ethylene and at least one other alpha-olefin monomer, said copolymer grafted with ethylenically monoansaturataed carboxylic acid material and B amido-a

The present invention is directed to a viscosity index improver for lubricating oil compositions comprising the reaction product of A a copolymer of ethylene and at least one other alpha-olefin monomer, said copolymer grafted with ethylenically monoansaturataed carboxylic acid material and B amido-amine or thioamido-amine comprising the reaction product of a polyamine and alpha, beta-unsaturated compound of the formula ##STR## wherein X is oxygen or sulfur, Y is OR 4, --SR 4 or ##STR## and R 1, R 2, R 3 R 4 and R 5 are independently selected from hydrogen, hydrocarbyl and substituted hydrocarbyl.

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1. Composition of matter comprising reaction product of: (i) (a) from 1 to 5 moles of a copolymer of ethylene and at least one other alpha-olefin monomer, said copolymer comprising intramolecularly heterogeneous copolymer chains containing at least one crystallizable segment of methylene units an

1. Composition of matter comprising reaction product of: (i) (a) from 1 to 5 moles of a copolymer of ethylene and at least one other alpha-olefin monomer, said copolymer comprising intramolecularly heterogeneous copolymer chains containing at least one crystallizable segment of methylene units and at least one low crystallinity ethylene-alpha-olefin copolymer segment, wherein said at least one crystallizable segment comprises at least about 10 weight percent of said copolymer chain and contains at least about 57 weight percent ethylene, wherein said low crystallinity segment contains not greater than about 53 weight percent ethylene, and wherein said copolymer has a molecular weight distribution characterized by at least one of a ratio of Mw/Mn of less than 2 and a ratio of Mz/Mw of less than 1.8, and wherein at least two portions of an individual intramolecularly heterogeneous chain, each portion comprising at least 5 weight percent of said chain, differ in composition from one another by at least 7 weight percent ethylene, said copolymer grafted with (b) from about 0.7 to 4.0 moles of ethylenically monounsaturated carboxylic acid material having 1 or 2 carboxylic acid groups or anhydride group per mole of copolymer to form grafted ethylene copolymer; and (ii) one mole amido-amine comprising reaction product obtained by heating the following mixture of (a) from about 1 to 10 equivalents of polyamine, based upon the primary amine content of said polyamine and (b) one mole of an alpha, beta unsaturated compound represented by the formula ##STR## wherein X is oxygen, Y is --OR 4 or ##STR## and R 1, R 2, R 3, R 4 and R 5 are independently selected from hydrogen, hydrocarbyl, and substituted hydrocarbyl. 2. The composition of matter according to claim 1 wherein aid polyamine (ii)(a) comprises polyamines containing from 2 to about 60 carbon atoms and from 2 to about 12 nitrogen atoms per molecule. 3. The composition of matter according to claim 2 wherein said polyamine (ii)(a) comprises alkylenepolyamine or polyalkylenepolyamine wherein each alkylene group contains 2 to 6 carbons and said alkylenepolyamine or polyalkylenepolyamine contains from 2 to about 5 nitrogen atoms per molecule. 4. The composition of matter according to claim 1 wherein said monounsaturated carboxylic acid material (i)(b) is selected from the group consisting of C 4 to C 10 monounsaturated dicarboxylic acid material, C 3 to C 10 monounsaturated monocarboxylic acid material, and mixtures thereof. 5. The composition of matter according to claim 4 wherein said monounsaturated carboxylic acid material (i)(b) comprises monounsaturated C 3 to C 10 monocarboxylic acid. 6. The composition of matter according to claim 4 wherein said monounsaturated carboxylic acid material (i)(b) comprises C 4 to C 10 monounsaturated dicarboxylic acid material. 7. The composition of matter according to claim 6 wherein said C 4 to C 10 monounsaturated dicarboxylic acid material is selected from the group consisting of maleic anhydride, maleic acid, and mixtures thereof. 8. The composition of matter according to claim 7 wherein said C 4 to C 10 monounsaturated dicarboxylic acid material is maleic anhydride. 9. The composition of matter according to claim 3 wherein said monounsaturated carboxylic acid material (i)(b) comprises C 4 to C 10 monounsaturated dicarboxylic acids or anhydrides. 10. The composition of matter according to claim 9, wherein said C 4 to C 10 monounsaturated dicarboxylic acids or anhydrides are selected from the group consisting of maleic acid, maleic anhydride, and mixtures thereof. 11. The composition of matter according to claim 1 wherein said alpha-, beta-unsaturated compound (ii)(b) comprises at least one member selected from the group consisting of methyl acrylate, ethyl acrylate, propyl acrylate, butyl acrylate, methyl methacrylate, ethyl methacrylate, propyl methacrylate, and butyl methacrylate. 12. The composition of matter according to claim 11 wherein said polyamine (ii)(a) comprises alkylenepolyamine or polyalkylenepolyamine wherein each alkylene group contains 2 to 6 carbons and said alkylenepolyamine or polyalkylenepolyamine contains from 2 to about 5 nitrogen atoms per molecule. 13. The composition of matter according to claim 12 wherein said polyamine (ii)(a) comprises ethylenepolyamine, propylenepolyamine, polyethylenepolyamine or, polypropylenepolyamine. 14. The composition of matter according to claim 12 wherein said polyamine contains at least 2 primary amino groups per molecule. 15. The composition of matter according to claim 14 wherein from about 3 to about 5 equivalents of said polyamine (ii)(a) based on said primary amine content thereof, are reacted per mole of said alpha, beta-unsaturated compound (ii)(b). 16. The composition of matter according to claim 15 wherein said amido-amine contains an average of from 1 to 3 amido groups per molecule. 17. The composition of matter according to claim 16 wherein said monounsaturated carboxylic acid material (i)(b) comprises maleic anhydride. 18. The composition of matter according to claim 17 wherein from about 3 to 5 equivalents of said amine (ii)(a), based on said primary amine content thereof are reacted per mole of said alpha, beta- unsaturated compound (ii)(b). 19. The composition of matter according to claim 18 wherein said amido-amine contains an average of from 1 to 3 thioamido groups per molecule. 20. The composition of matter according to claim 1 wherein said copolymer (i)(a) has an intermolecular compositional dispersity such that 95 weight % of said copolymer chains have a composition 15 weight % or less different from said average ethylene composition. 21. The composition of matter according to claim 30 wherein said intermolecular compositional dispersity of said copolymer (i)(a) is such that 95 weight % of said copolymer chains have a composition 10 wt. % or less different from said average ethylene composition. 22. The composition of matter according to claim 1, wherein said low crystallinity segment of said copolymer (i)(a) comprises from about 20 to 53 wt. % ethylene. 23. The composition of matter according to claim 22 wherein said crystallizable segment comprises at least about 57 wt. % ethylene. 24. The composition of matter according to claim 23 wherein said copolymer (i)(a) is characterized by a weight-average molecular weight of from about 20,000 to about 250,000. 25. The composition of matter according to claim 1 wherein said copolymer (i)(a) has a MWD characterized by at least one of a ratio of M w /M n of less than about 1.5 and a ratio of M z /M w of less than about 1.5. 26. The composition of matter according to claim 25 wherein said copolymer (i)(a) has a MWD characterized by at least one of a ratio of M w /M n of less than about 1.25 and a ratio of M z /M w of less than about 1.2. 27. The composition of matter according to claim 25 wherein said intermolecular compositional dispersity of said copolymer (i)(a) is such that 95 weight % of said copolymer chains have a composition 13 weight % or less different from said average ethylene composition. 28. The composition of matter according to claim 23 wherein said low crystallinity segment of said copolymer (i)(a) comprises from about 30 to 50 weight % ethylene. 29. The composition of matter according to claim 1 wherein said copolymer (i)(a) has a total minimum ethylene content of about 20 % on a weight basis. 30. The composition of matter according to claim 1 wherein said copolymer's (i)(a) chain segment sequences are characterized by at least one of the structures: ##EQU##M-T (I) ##EQU##T 1 -(M-T 2 ) x (II) ##EQU##T 1 -(M 1 -T 2 ) y -M 2 (III) wherein x and y are each integers of 1 to 3, M comprises said crystallizable segment, T comprises said low crystallinity segment, M 1 and M 2 are the same or different and each comprises an M segment, and T 1 and T 2 are the same or different and each comprises a T segment. 31. The composition of matter according to claim 30 wherein said copolymer's (i)(a) segment sequences are characterized by structure I. 32. The composition of matter according to claim 30 wherein said copolymer's (i)(a) chain segment sequences are characterized by structure II. 33. The composition of matter according to claim 22 wherein x is one. 34. The composition of matter according to claim 33 in said copolymer (i)(a) said T 1 and T 2 segments are of substantially the same weight-average molecular weight. 35. The composition of matter according to claim 34 wherein in said copolymer (i)(a) the sum of the weight average molecular weights of said T 1 and T 2 segments is substantially equal to the weight-average molecular weight of said M segment. 36. The composition of matter according to claim 32 wherein said copolymer (i)(a) has a MWD characterized by at least one of a ratio of M w /M w of less than about 1.5 and a ratio of M z /M w of less than about 1.5. 37. The composition of matter according to claim 35 wherein said copolymer (i)(a) has a MWD characterized by at least one of a ratio of M w /M n of less than about 1.25 and a ratio of M z /M w of less than about 1.2. 38. An oleaginous composition comprising: (1) oleaginous material and (2) a viscosity index improving effective amount of a multifunctional viscosity index improver comprised of reaction product of (i) (a) from 1 to 5 moles of a copolymer of ethylene and at least one other alpha-olefin monomer, said copolymer comprising intramolecularly heterogeneous copolymer chains containing at least one crystallinity ethylene-alpha-olefin copolymer segment, wherein said at least one crystallizable segment comprises at least about 10 weight percent of said copolymer chain and contains at least about 57 weight percent ethylene, wherein said low crystallinity segment contains not greater than about 53 weight percent ethylene, and wherein said copolymer has a molecular weight distribution characterized by at least one of a ratio of M w /M n of less than 2 and a ratio of M z /M w of less than 1.8, and wherein at least two portions of an individual intramolecularly heterogeneous chain, each portion comprising at least 5 weight percent of said chain, differ in composition from one another by at least 7 weight percent ethylene, said copolymer grafted with (b) from about 0.7 to 4.0 moles of ethylenically monounsaturated carboxylic acid material having 1 to 2 carboxylic acid groups or anhydride group per mole of copolymer to form grafted ethylene copolymer; and (ii) one mole amido-comprising reaction product (a) from about 1 to 10 equivalents of polyamine, based upon the primary amine content of said polyamine and (b) one mole of an alpha, beta-unsaturated compound represented by the formula ##STR## wherein X is oxygen, Y is --OR 4 or ##STR## and R 1, R 2, R 3, R 4 and R 5 independently selected from hydrogen, hydrocarbyl, and substituted hydrocarbyl. 39. The composition according to claim 38 which contains viscosity index improving and dispersant effective amount of (2). 40. The composition according to claim 39 which contains from about 0.001 to about 49 wt. % of (2). 41. The composition according to claim 39 which contains from about 0.001 to about 20 wt. % of (2). 42. The composition according to claim 41 which contains from about 0.01 to about 15 wt. % of (2). 43. The composition according to claim 42 which contains from about 0.1 to about 10 wt. % of (2). 44. The composition according to claim 38 wherein (1) is a lubricating oil. 45. The composition according to claim 44 wherein said composition is a fully formulated lubricating oil composition. 46. The composition according to claim 44 wherein said composition is an oil concentrate. 47. The composition according to claim 35 wherein said copolymer of ethylene (2)(i)(a) comprises copolymer of ethylene and propylene. 48. The composition according to claim 38, wherein said copolymer (2)(i)(a) has an intermolecular compositional dispersity such that 95 weight % of said copolymer chains have a composition 15 weight % or less different from said average ethylene composition. 49. The composition according to claim 48 wherein said intermolecular compositional dispersity of said copolymer (2)(i)(a) is such that 95 weight % of said copolymer chains have a composition 10 wt. % or less different from said average ethylene composition. 50. The composition according to claim 38 wherein said low crystallinity segment of said copolymer (2)(i)(a) comprises from about 20 to 53 wt. % ethylene. 51. The composition according to claim 50 wherein said crystallizable segment of said copolymer (2)i)(a) comprises at least about 57 wt. % ethylene. 52. The composition according to claim 38 wherein said copolymer (2)(i)(a) is characterized by a weight-average molecular weight of from about 20,000 to about 250,000. 53. The composition according to claim 38 wherein said copolymer (2)(i)(a) has a MWD characterized by at least one of a ratio of M w /M n of less than about 1.5 and a ratio of M z /M w of less than about 1.5. 54. The composition according to claim 53 wherein said copolymer (2)(i)(a) has a MWD characterized by at least one of a ratio of M w /M n of less than about 1.25 and a ratio of M z /M w of less than about 1.2. 55. The composition according to claim 53 wherein said intermolecular compositional dispersity of said copolymer (2)(i)(a) is such that 95 weight % of said copolymer chains have a composition 13 weight % or less different from said average ethylene composition. 56. The composition according to claim 50 wherein said low crystallinity segment of said copolymer (2)(i)(a) comprises from about 30 to 50 weight % ethylene. 57. The composition according to claim 38 wherein said copolymer (2)(i)(a) has a total minimum ethylene content of about 20 % on a weight basis. 58. The composition according to claim 38 wherein said copolymer's (2)(i)(a) chain segment sequences are characterized by at least one of the structures: ##EQU##M-T (I) ##EQU##T 1 -(M-T 2 ) x (II) ##EQU##T 1 -(M 1 -M 1 -T 2 ) y -M 2 (III) wherein x and y are each integers of 1 to 3, M comprises said crystallizable segment, T comprises said low crystallinity segment, M 1 and M 2 are the same or different and each comprises an M segment, and T 1 and T 2 are the same or different and each comprises a T segment. 59. The composition according to claim 58 wherein said copolymer's (2)(i)(a) segment sequences are characterized by structure I. 60. The composition according to claim 59 wherein said copolymer's (2)(i)(a) chain segment sequences are characterized by structure II. 61. The composition according to claim 60 wherein x is one. 62. The composition according to claim 61 wherein in said copolymer (2)(i)(a) said T 1 and T 2 segments are of substantially the same weight-average molecular weight. 63. The composition according to claim 62 wherein in said copolymer (2)(i)(a) the sum of the weight average molecular weights of said T 1 and T 2 segments is substantially equal to the weight-average molecular weight of said M segment. 64. The composition according to claim 63 wherein said copolymer (2)(i)(a) has a MWD characterized by at least one of a ratio of M w /M n of less than about 1.5 and a ratio of M z /M w of less than about 1.5. 65. The composition according to claim 64 wherein said copolymer (2)(i)(a) has a MWD characterized by at least one or a ratio of M w /M n of less than about 1.25 and a ratio of M z /M w of less than about 1.2. 66. The composition according to claim 65 wherein said copolymer (2)(i)(a) has a MWD characterized by both a ratio of M w /M n of less than about 1.25 and a ratio of M z /M w of less than about 1.2. 67. The composition according to claim 38 wherein said copolymer (2)(i)(a) has a total ethylene content of greater than about 35% on a weight basis. 68. The composition according to claim 38 wherein (2)(i)(b) is selected from C 3 to C 10 monounsaturated monocarboxylic acids. 69. The composition according to claim 38 wherein (2)(i)(b) is selected from C 4 to C 10 monounsaturated dicarboxylic acids or anhydrides. 70. The composition according to claim 69 wherein (2)(i)(b) is selected from the group consisting of maleic acid, maleic anhydride, and mixtures thereof. 71. The composition according to claim 70 wherein (2)(i)(b1 is maleic anhydride. 72. The composition according to claim 70 wherein said copolymer of ethylene (2)(i)(a) comprises copolymer of ethylene and propylene. 73. The composition according to claim 68 wherein (2)(i)(b) is selected from the group consisting of acrylic acid or esters thereof and methacrylic acid or esters thereof. 74. The composition according to claim 72 wherein said polyamine (2)(ii)(a) contains from 2 to about 60 carbon atoms and from 2 to about 12 nitrogen atoms per molecule. 75. The composition according to claim 74 wherein said polyamine (2)(ii)(a) comprises alkylenepolyamine or polyalkylenepolyamine wherein each alkylene group contains 2 to 6 carbons and said alkylenepolyamine or polyalkylenepolyamine contains from 2 to about 5 nitrogen atoms per molecule. 76. The composition according to claim 74 wherein said polyamine (2)(ii)(a) contains at least two primary amino groups per molecule. 77. The composition according to claim 75 wherein said alkylenepolyamine or polyalkylenepolyamine contains at least two primary amino groups per molecule. 78. The composition according to claim 77 wherein p said polyalkylenepolyamine comprises polyethylenepolyamine or polypropylenepolyamine. 79. The composition according to claim 72 wherein said polyamine (2)(ii)(a) contains an average of at least 2 primary nitrogen atoms per molecule, and said polyamine and said alpha, beta-unsaturated compound are contacted in an amount of from about 3 to 5 equivalents of said polyamine, based on said primary amine content, per mole of said alpha, beta-unsaturated compound. 80. The composition according to claim 38 wherein said polyamine (2)(ii)(a) contains from 2 to about 60 carbon atoms and from 2 to about 12 nitrogen atoms per molecule. 81. The composition according to claim 80 wherein said polyamine (2)(ii)(a) comprises alkylenepolyamine or polyalkylenepolyamine wherein each alkylene group contains 2 to 6 carbons and said alkylenepolyamine or polyalkylenepolyamine contains from 2 to about 5 nitrogen atoms per molecule. 82. The composition according to claim 80 wherein polyamine (2)(ii)(a) contains at least two primary amino groups per molecule. 83. The composition according to claim 81 wherein said alkylenepolyamine or polyalkylenepolyamine contains at least two primary amino groups per molecule. 84. The composition according to claim 83 wherein said polyalkylenepolyamine comprises polyethylenepolyamine or polypropylenepolyamine. 85. The composition according to claim 38 wherein said polyamine (2)(ii)(a) contains an average of at least 2 primary nitrogen atoms per molecule, and said polyamine and said alpha, beta-unsaturated compound are contacted in an amount of from about 3 to 5 equivalents of said polyamine, based on said primary amine content, per mole of said alpha, beta-unsaturated compound.