Patent US4999404A successfully refreshed from Google Patents.
US4999404A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Monomer resin
Assignee: Dunlop Sports Co Ltd
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Filing: 1985-10-03
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Granted: 1991-03-12
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Expires: 2005-10-03
Abstract
Abstract The present invention provides an ionomer resin prepared by additionally neutralizing 2 to 30% of free carboxyl groups with magnesium hydroxide. According to the present invention, physical properties of the sodium neutralized ionomer resin are improved.
Inventors
- 👤 Taketo Matsuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:55
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/44
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
123 words
An ionomer resin comprising an ionomer resin product prepared by additionally neutralizing with magnesium hydroxide free carboxyl groups of a sodium neutralized ionomer resin, said sodium neutralized ionomer resin being prepared by copolymerizing 96 to 70% by weight of a monoolefin with 4 to 30% by weight of an unsaturated mono- or di-carboxylic acid having 3 to 8 carbon atoms or an ester thereof and neutralizing with sodium, said weight % being based on the total weight of the monomer, wherein said magnesium hydroxide is added to said sodium neutralized ionomer resin in an amount sufficient to neutralize 20 to 30% of the free carboxyl groups in said sodium neutralized ionomer resin and mixing at a temperature of from 150° to 250° C.
Claim 2
Dependent Claim
123 words
An ionomer resin comprising an ionomer resin product prepared by additionally neutralizing with magnesium hydroxide free carboxyl groups of a sodium neutralized ionomer resin, said sodium neutralized ionomer resin being prepared by copolymerizing 96 to 70% by weight of a monoolefin with 4 to 30% by weight of an unsaturated mono- or di-carboxylic acid having 3 to 8 carbon atoms or an ester thereof and neutralizing with sodium, said weight % being based on the total weight of the monomer, wherein said magnesium hydroxide is added to said sodium neutralized ionomer resin in an amount sufficient to neutralize 20 to 30% of the free carboxyl groups in said sodium neutralized ionomer resin and mixing at a temperature of from 150° to 250° C.
Claim 3
Dependent Claim
33 words
The ionomer resin according to claim 1, wherein the amount of said magnesium hydroxide is 0.2 to 1.5 parts by weight based on 100 parts by weight of said sodium neutralized ionomer resin.
Claim 4
Dependent Claim
32 words
The ionomer resin according to claim 1, wherein the amount of said magnesium hydroxide is about 0.3 parts by weight based on 100 parts by weight of said sodium neutralized ionomer resin.
Claim 5
Dependent Claim
28 words
A resin product comprising: an ionomer resin according to claim 1, and an additive selected from the group consisting of pigments, lubricants, dispersants, antioxidants, stabilizers and ultraviolet absorbers.
Claim 6
Dependent Claim
28 words
A resin product comprising: an ionomer resin according to claim 2, and an additive selected from the group consisting of pigments, lubricants, dispersants, antioxidants, stabilizers and ultraviolet absorbers.
References Cited (Backward Citations)
US4526375A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-03-11 | 1994-09-10 | 1995-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-03-11 | 1998-09-10 | 1999-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-03-11 | 2002-09-10 | 2003-03-12 | $7700.00 | Window Closed / Lapsed |