US4990574A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for production of modified resin
Assignee: Dunlop Sports Co Ltd
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Filing: 1989-03-02
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Granted: 1991-02-05
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Expires: 2009-03-02
Abstract
Abstract The present invention provides an ionomer resin having desired properties which is free from the above drawbacks and can readily react in an extruder. That is, the present invention provides a process for producing a modified ionomer resin which comprises mixing ionomer resin wherein 10-60% of the total carboxylic acid moieties are neutralized with sodium ions with basic zinc carbonate under molten conditions to further neutralize 10-40% of the total carboxylic acid moieties with zinc ions.
Inventors
- 👤 Mikio Yamada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:50
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/44
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
48 words
A process for producing a modified ionomer resin which comprises mixing ionomer resin, wherein 10-60 % of the whole carboxylic acid moieties are neutralized with sodium ions, with basic zinc carbonate under melting conditions to further neutralize 10-40 % of the whole carboxylic acid moieties with zinc ions.
Claim 2
Dependent Claim
48 words
A process for producing a modified ionomer resin which comprises mixing ionomer resin, wherein 10-60 % of the whole carboxylic acid moieties are neutralized with sodium ions, with basic zinc carbonate under melting conditions to further neutralize 10-40 % of the whole carboxylic acid moieties with zinc ions.
Claim 3
Dependent Claim
16 words
The process according to claim 1, wherein carboxylic acid in the ionomer resin is 10-20 wt%.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-02-04 | 1994-08-06 | 1995-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-02-04 | 1998-08-06 | 1999-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-02-04 | 2002-08-06 | 2003-02-05 | $7700.00 | Window Closed / Lapsed |