US5096945A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for making reshapable articles containing lignocellulose utilizing polyisocyanate resins
Assignee: BOARD OF CONTROL OF MICHIGAN TECHNOLOGICAL UNIVERSITY A CORP OF MI
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Filing: 1990-06-11
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Granted: 1992-03-17
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Expires: 2010-06-11
Abstract
Abstract Reshapable composite material and/or articles formed from lignocellulose-containing materials and having improved strength and water resistance characteristics are made by applying about 7 to about 100 weight % of a polyisocyanate resin to fibers and/or fiber bundles of a lignocellulose-containing material. The resulting mixture or furnish is compression molded to form a composite material and/or article of the desired shape and dimensions.
Inventors
- 👤 Bernard C. Sun
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:07
CPC Classifications
C; C08; C08L; C08L97/00; C08L97/02
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
102 words
In a method for making lignocellulosic fiber composite material from lignocellulosic fibers in which a binder is applied to fibers of a lignocellulosic material and the resulting mixture is pressed into a composite material of the desired shape and dimensions, said method comprising the steps of, (a) applying to said fibers of a lignocellulosic material about 10 to about 30 weight % of a polyisocyanate resin, based on the oven dry weight of said fibers; and (b) applying heat and pressure to the resulting mixture for a sufficient period of time to form a composite material of the desired shape and dimensions.
Claim 2
Dependent Claim
102 words
In a method for making lignocellulosic fiber composite material from lignocellulosic fibers in which a binder is applied to fibers of a lignocellulosic material and the resulting mixture is pressed into a composite material of the desired shape and dimensions, said method comprising the steps of, (a) applying to said fibers of a lignocellulosic material about 10 to about 30 weight % of a polyisocyanate resin, based on the oven dry weight of said fibers; and (b) applying heat and pressure to the resulting mixture for a sufficient period of time to form a composite material of the desired shape and dimensions.
Claim 3
Dependent Claim
16 words
The method of claim 1 wherein said polyisocyanate resins contain two or more isocyanate functional groups.
Claim 4
Dependent Claim
13 words
The method of claim 2 wherein said polyisocyanate resin is a diphenylmethane polyisocyante.
Claim 5
Dependent Claim
12 words
The method of claim 1 wherein said composite material is an article.
Claim 6
Dependent Claim
19 words
The method of claim 1 wherein the diameter of said fibers is about 5 μM to about 80 μM.
Claim 7
Dependent Claim
37 words
A reshapable product made by compression molding a mixture of lignocellulosic fibers and about 10 to about 30 weight % of a polyisocyanate resin, based on the oven dry weight of said fibers, into the desired shape.
Claim 8
Dependent Claim
37 words
A reshapable product made by compression molding a mixture of lignocellulosic fibers and about 10 to about 30 weight % of a polyisocyanate resin, based on the oven dry weight of said fibers, into the desired shape.
Claim 9
Dependent Claim
14 words
The reshapable product of claim 6 wherein said polyisocyanate resin is a diphenylmethane polyisocyanate.
References Cited (Backward Citations)
US3557263A
Cited
US4546039A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-03-17 | 1995-09-16 | 1996-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-03-17 | 1999-09-16 | 2000-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-03-17 | 2003-09-16 | 2004-03-17 | $7700.00 | Window Closed / Lapsed |