US4624985A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paper coating composition comprising PVA containing acetoacetyl group and a pigment
Assignee: Mitsubishi Chemical Corp
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Filing: 1985-12-17
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Granted: 1986-11-25
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Expires: 2005-12-17
Abstract
Abstract A paper coating composition comprising a polyvinyl alcohol resin containing acetoacetyl group prepared in the presence of a pigment having a pH of not more than 8. The composition of the invention gives heat sensitive recording paper which has increased color density, excellent plasticizer resistance and low adhesiveness to a thermal print head.
Inventors
- 👤 Shuji Tsutsumi
- 👤 Yoshirou Yamaguchi
- 👤 Satoru Kageyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:07
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/40; B41M5/42; B41M5/44; C; C08; C08F; C08F8/00; C08F8/12; B41M2205/00; B41M2205/04; B41M2205/40; B41M5/426
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
35 words
A paper coating composition comprising polyvinyl alcohol resin containing acetoacetyl group prepared by polymerizing vinyl acetate in the presence of a pigment having not more than pH 8 and then, hydrolysing the obtained polyvinyl acetate.
Claim 2
Dependent Claim
35 words
A paper coating composition comprising polyvinyl alcohol resin containing acetoacetyl group prepared by polymerizing vinyl acetate in the presence of a pigment having not more than pH 8 and then, hydrolysing the obtained polyvinyl acetate.
Claim 3
Dependent Claim
17 words
The paper coating composition of claim 1, which is employed for processing a heat sensitive recording paper.
Claim 4
Dependent Claim
39 words
The paper coating composition of claim 1, which is employed for forming a protective layer coated on a heat sensitive layer containing a color forming material and a color developing material reacting with said color forming material by heating.
References Cited (Backward Citations)
US4350788A
Cited
JPS57185195A
Cited
JPS5824435A
Cited
JPS5856894A
Cited
EP0111335A2
Cited
US4513301A
Cited
JPS6023097A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-11-24 | 1990-05-26 | 1990-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-11-24 | 1994-05-26 | 1994-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-11-24 | 1998-05-26 | 1998-11-25 | $7700.00 | Window Closed / Lapsed |