US5064592A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of producing surface hardened woody decorative sheets
Assignee: Okura Industrial Co Ltd
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Filing: 1989-11-29
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Granted: 1991-11-12
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Expires: 2009-11-29
Abstract
Abstract The invention relates to a process of producing a surface hardened woody decorative sheet by reacting a cellulose material such as a wood flour, a wood chip, a chaff, etc., with a dibasic acid anhydride and a monoepoxy compound having a polymerizable double bond to form a setting composition mainly composed of an oligoesterified cellulose material having a polymerizable double bond and an oligomer having a polymerizable double bond, placing in layer the setting composition on a woody sheet, and hot-pressing them to integrate the setting composition and the woody sheet in a body.
Inventors
- 👤 Minoru Ueda
- 👤 Hideaki Matsuda
- 👤 Koichi Murakami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:51
CPC Classifications
C; C08; C08F; C08F299/00; B; B27; B27N; B27N7/00; B27N7/005; C08F251/00; C08F251/02; B27N3/00; B27N3/02
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
102 words
A process of producing a surface-hardened woody decorative sheet, which comprises forming on a woody sheet a layer of a mixture of (A) a composition mainly composed of an oligoesterified cellulose material having a polymerizable double bond and (B) an oligomer having a polymerizable double bond obtained by reacting a cellulose material, a monoepoxy compound having a polymerizable double bond and a dibasic acid anhydride, and then heat-pressing said woody sheet to simultaneously carry out the plasticization of component (A) and the crosslinking of components (A) and (B) by the polymerization of the polymerizable double bonds of said components (A) and (B).
Claim 2
Dependent Claim
102 words
A process of producing a surface-hardened woody decorative sheet, which comprises forming on a woody sheet a layer of a mixture of (A) a composition mainly composed of an oligoesterified cellulose material having a polymerizable double bond and (B) an oligomer having a polymerizable double bond obtained by reacting a cellulose material, a monoepoxy compound having a polymerizable double bond and a dibasic acid anhydride, and then heat-pressing said woody sheet to simultaneously carry out the plasticization of component (A) and the crosslinking of components (A) and (B) by the polymerization of the polymerizable double bonds of said components (A) and (B).
Claim 3
Dependent Claim
32 words
The process as claimed in claim 1, wherein the cellulose material is wood flours, wood fibers, wood chips, chaffs, waste papers, pulps, rice straws, wheat straws, linter powders, bagasses, or sander powders.
Claim 4
Dependent Claim
20 words
The process as claimed in claim 1, wherein the dibasic acid anhydride is maleic anhydride, phthalic anhydride, or succinic anhydride.
Claim 5
Dependent Claim
18 words
The process as claimed in claim 1, wherein the monoepoxy compound is allyl glycidyl ether or glycidyl methacrylate.
Claim 6
Dependent Claim
63 words
The process as claimed in claim 1, wherein the setting composition mainly composed of the oligoesterified cellulose material having polymerizable double bond (Component A) and the oligomer having polymerizable double bond (Component B) is prepared by adding the basic acid anhydride to the cellulose material following by reaction and then adding thereto the monoepoxy compound having polymerizable double bond followed by causing reaction.
Claim 7
Dependent Claim
57 words
The process as claimed in claim 1, wherein the setting composition mainly composed of the oligoesterified cellulose material having polymerizable double bond (Component A) and the oligomer having polymerizable double bond (Component B) is prepared by simultaneously adding the dibasic acid anhydride and the monoepoxy compound having polymerizable double bond to the cellulose material followed by reaction.
Claim 8
Dependent Claim
41 words
The process as claimed in claim 1, wherein the total amount of the dibasic acid anhydride and the monoepoxy compound having polymerizable double bond is from 30 to 150 parts by weight to 100 parts by weight of the cellulose material.
Claim 9
Dependent Claim
31 words
The process as claimed in claim 1, wherein the amount of the monoepoxy compound having polymerizable double bond is from 1 to 2 mols per mol of the dibasic acid anhydride.
Claim 10
Dependent Claim
42 words
The process as claimed in claim 1, wherein the reaction of producing the setting composition from the cellulose material, the dibasic acid anhydride, and the monoepoxy compound having polymerizable double bond is carried out at a temperature of at least 60° C.
Claim 11
Dependent Claim
31 words
The process as claimed in claim 1, wherein the amount of the setting composition being spread on the surface of the woody sheet is from 0.2 to 1.0 kg/m 2 .
Claim 12
Dependent Claim
52 words
The process as claimed in claim 1, wherein in the case of producing the surface hardened woody decorative sheet having an uneven pattern on the surface of the woody sheet, the amount of the setting composition being spread on the surface of the woody sheet is at least 1.0 kg/m 2 .
Claim 13
Dependent Claim
50 words
The process as claimed in claim 1, wherein in the setting composition, the proportion of the oligomer having polymerizable double bond (Component B) to the oligoesterified cellulose material having polymerizable double bond (Component A) is from 10 to 45 parts by weight to 100 parts by weight of the latter.
Claim 14
Dependent Claim
41 words
The process as claimed in claim 1, wherein the plasticization of the setting composition obtained from the cellulose material, the dibasic acid anhydride, and the allyl glycidyl ether is carried out in the existence of dicumyl peroxide as a polymerization initiator.
Claim 15
Dependent Claim
38 words
The process as claimed in claim 1, wherein the heat-pressing is carried out at a temperature of from 100° to 200° C. at a pressure of from 20 to 400 kg/cm 2 for from 1 to 40 minutes.
References Cited (Backward Citations)
US3645939A
Cited
US4175105A
Cited
US4237087A
Cited
JPS599041A
Cited
JPS59152837A
Cited
JPS609737A
Cited
JPS60124203A
Cited
US4517228A
Cited
JPS60166301A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-11-11 | 1995-05-13 | 1995-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-11-11 | 1999-05-13 | 1999-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-11-11 | 2003-05-13 | 2003-11-12 | $7700.00 | Window Closed / Lapsed |