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US4410655A Expired / Lapsed US ⏱️ 0.0 years remaining

Aqueous dispersion of ethylene/α,β-unsaturated carboxylic acid copolymer blend

Assignee: Mitsui Chemicals Inc
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Filing: 1981-06-05
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Granted: 1983-10-18
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Expires: 2001-06-05
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Abstract

Abstract An aqueous dispersion of improved stability, said dispersion consisting essentially of a mixture of (A) 10 to 90% by weight of an ethylene/ alpha , beta -unsaturated carboxylic acid copolymer containing 12 to 20% by weight on an average of alpha , beta -unsaturated carboxylic acid units or the metal salt thereof, and (B) 90 to 10% by weight of an ethylene/ alpha , beta -unsaturated carboxylic acid copolymer containing 5 to 12% by weight on an average of alpha , beta -unsaturated carboxylic acid units or the metal salt thereof, said mixture containing 8 to 20% by weight on an average, based on the weight of the mixture, of the alpha , beta -unsaturated carboxylic acid units, 30 to 80% of which units are present in the form of metal salts, and said mixture not containing more than 5% by weight, based on the weight of the mixture, of a fraction of the ethylene/ alpha , beta -unsaturated carboxylic acid having an alpha , beta -unsaturated carboxylic acid unit content of less than 5% by weight or its salt, and more than 10% by weight, based on the weight of the mixture, of a fraction of the ethylene/ alpha , beta -unsaturated carboxylic acid having an alpha , beta -unsaturated carboxylic acid unit content of more than 20% by weight or its salt.

Inventors

  • 👤 Katsumi Funakoshi
  • 👤 Hideyuki Itoi
  • 👤 Toshifumi Konishi

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-06 06:14
CPC Classifications
C; C09; C09D; C09D123/00; C09D123/02; C09D123/04; C09D123/08; Y; Y10; Y10S; Y10S260/00; Y10S260/31; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31692

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 257 words
An aqueous dispersion of improved stability, said dispersion consisting essentially of a mixture of (A) 30 to 50% by weight of an ethylene/α,β-unsaturated carboxylic acid copolymer containing 12 to 20% by weight on an average of α,β-unsaturated carboxylic acid units or the metal salt there of, and (B) 70 to 50% by weight of an ethylene/α,β-unsaturated carboxylic acid copolymer containing 5 to 12% by weight on an average of α,β-unsaturated carboxylic acid units or the metal salt there of, both components (A) and (B) having a melt index of from 0.5 to 100, said mixture containing 8 to 20% by weight on an average, based on the weight of the mixture of the α,β-unsaturated carboxylic acid units, 40 to 80% of which units are present in the form of metal salts, and said mixture not containing more than 5% by weight, based on the weight of the mixture, of a fraction of the ethylene/α,β-unsaturated carboxylic acid having an α,β-unsaturated carboxylic acid unit content of less than 5% by weight or its salt, and more than 10% by weight, based on the weight of the mixture, of a fraction of the ethylene/α,β-unsaturated carboxylic acid having an α,β-unsaturated carboxylic acid unit content of more than 20% by weight or its salt, the α,β-unsaturated carboxylic acid being selected from the group consisting of acrylic acid, methacrylic acid, α-ethylacrylic acid, maleic acid, fumaric acid, and itaconic acid and the metal salt being selected from the group consisting of an alkali metal salt, an alkaline earth metal salt and a zinc salt.
Claim 2
Dependent Claim 257 words
An aqueous dispersion of improved stability, said dispersion consisting essentially of a mixture of (A) 30 to 50% by weight of an ethylene/α,β-unsaturated carboxylic acid copolymer containing 12 to 20% by weight on an average of α,β-unsaturated carboxylic acid units or the metal salt there of, and (B) 70 to 50% by weight of an ethylene/α,β-unsaturated carboxylic acid copolymer containing 5 to 12% by weight on an average of α,β-unsaturated carboxylic acid units or the metal salt there of, both components (A) and (B) having a melt index of from 0.5 to 100, said mixture containing 8 to 20% by weight on an average, based on the weight of the mixture of the α,β-unsaturated carboxylic acid units, 40 to 80% of which units are present in the form of metal salts, and said mixture not containing more than 5% by weight, based on the weight of the mixture, of a fraction of the ethylene/α,β-unsaturated carboxylic acid having an α,β-unsaturated carboxylic acid unit content of less than 5% by weight or its salt, and more than 10% by weight, based on the weight of the mixture, of a fraction of the ethylene/α,β-unsaturated carboxylic acid having an α,β-unsaturated carboxylic acid unit content of more than 20% by weight or its salt, the α,β-unsaturated carboxylic acid being selected from the group consisting of acrylic acid, methacrylic acid, α-ethylacrylic acid, maleic acid, fumaric acid, and itaconic acid and the metal salt being selected from the group consisting of an alkali metal salt, an alkaline earth metal salt and a zinc salt.

References Cited (Backward Citations)

US3970626A Cited
US3392131A Cited
US3649578A Cited
US4136069A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1986-10-17 1987-04-18 1987-10-18 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1990-10-17 1991-04-18 1991-10-18 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1994-10-17 1995-04-18 1995-10-18 $7700.00 Window Closed / Lapsed

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