US4344798A
Expired / Lapsed
US
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Organic polyisocyanate-dialkyl carbonate adhesive binder compositions
Assignee: Lyondell Chemical Technology LP
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Filing: 1981-08-17
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Granted: 1982-08-17
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Expires: 2001-08-17
Abstract
Abstract An adhesive binder composition is provided for the preparation of lignocellulosic composite molded articles such as flake or particle board, made from moldable compositions which comprises an organic di- or polyisocyanate and a liquid dialkyl ester of carbonic acid and optionally lignin, for application to the lignocellulosic material prior to the molding process to form the composite product.
Inventors
- 👤 James M. Gaul
- 👤 Tinh Nguyen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:46
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/10; C08K5/109; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/703; C08L; C08L75/00; C08L97/00; C08L97/02; C08L2205/00; C08L2205/06; C08L75/04
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
49 words
An adhesive binder composition for the preparation of compression moldable lignocellulosic articles which comprises from about 20 to 95 percent by weight of an organic di- or polyisocyanate and from about 5 to 80 percent by weight of a liquid dialkyl carbonate having from 3 to 11 carbon atoms.
Claim 2
Dependent Claim
49 words
An adhesive binder composition for the preparation of compression moldable lignocellulosic articles which comprises from about 20 to 95 percent by weight of an organic di- or polyisocyanate and from about 5 to 80 percent by weight of a liquid dialkyl carbonate having from 3 to 11 carbon atoms.
Claim 3
Dependent Claim
23 words
The adhesive composition of claim 1 wherein from 0 to 60 weight percent lignin based on the total composition is added as diluent.
Claim 4
Dependent Claim
18 words
The adhesive composition of claim 2 wherein between 20 and 35 weight percent lignin is added as diluent.
Claim 5
Dependent Claim
26 words
The adhesive composition of claim 1 wherein the dialkyl carbonate is selected from the group consisting of dimethyl carbonate, diethyl carbonate, diallyl carbonate and diisobutyl carbonate.
Claim 6
Dependent Claim
13 words
The adhesive composition of claim 4 wherein the dialkyl carbonate is dimethyl carbonate.
Claim 7
Dependent Claim
13 words
The adhesive composition of claim 4 wherein the dialkyl carbonate is diethyl carbonate.
Claim 8
Dependent Claim
13 words
The adhesive composition of claim 4 wherein the dialkyl carbonate is diallyl carbonate.
Claim 9
Dependent Claim
15 words
The adhesive composition of claim 1 wherein the di- or polyisocyanate is a diphenylmethane diisocyanate.
Claim 10
Dependent Claim
24 words
The adhesive composition of claim 1 wherein the di- or polyisocyanate is a mixture of diphenylmethane diisocyanate and the higher functionality polymethylene polyphenyl isocyanates.
Claim 11
Dependent Claim
28 words
The adhesive composition of claim 1 wherein from 50 to 75 weight percent organic di- or polyisocyanate and from 50 to 25 weight percent dialkyl carbonate is employed.
Claim 12
Dependent Claim
58 words
A compression moldable lignocellulosic composition comprising lignocellulosic particles and from about 1.5 to 12 percent by weight based on oven dried particles of an adhesive binder composition which comprises from about 20 to 95 weight percent organic di- or polyisocyanate and from about 5 to 80 weight percent liquid dialkyl carbonate having from 3 to 11 carbon atoms.
Claim 13
Dependent Claim
58 words
A compression moldable lignocellulosic composition comprising lignocellulosic particles and from about 1.5 to 12 percent by weight based on oven dried particles of an adhesive binder composition which comprises from about 20 to 95 weight percent organic di- or polyisocyanate and from about 5 to 80 weight percent liquid dialkyl carbonate having from 3 to 11 carbon atoms.
Claim 14
Dependent Claim
20 words
The compression moldable composition of claim 11 wherein 2.5 to 6.5 weight percent adhesive binder is employed in the composition.
Claim 15
Dependent Claim
26 words
The compresson moldable composition of claim 11 wherein from 0 to 60 weight percent lignin based on the total adhesive binder composition is added as diluent.
Claim 16
Dependent Claim
17 words
The compression moldable composition of claim 13 wherein the lignin is between 20 and 35 weight percent.
Claim 17
Dependent Claim
27 words
The compression moldable composition of claim 11 wherein the dialkyl carbonate is selected from the group consisting of dimethyl carbonate, diethyl carbonate, diallyl carbonate and diisobutyl carbonate.
Claim 18
Dependent Claim
14 words
The compression moldable composition of claim 15 wherein the dialkyl carbonate is dimethyl carbonate.
Claim 19
Dependent Claim
14 words
The compression moldable composition of claim 15 wherein the dialkyl carbonate is diethyl carbonate.
Claim 20
Dependent Claim
14 words
The compression moldable composition of claim 15 wherein the dialkyl carbonate is diallyl carbonate.
Claim 21
Dependent Claim
33 words
The compression moldable composition of claim 11 wherein from 50 to 75 weight percent organic di-or polyisocyanate and from 50 to 25 weight percent liwquid dialkyl carbonate is employed in the adhesive binder.
Claim 22
Dependent Claim
16 words
The compression moldable composition of claim 11 wherein the di- or polyisocyanate is a diphenylmethane diisocyanate.
Claim 23
Dependent Claim
25 words
The compression moldable composition of claim 11 wherein the di- or polyisocyanate is a mixture of diphenylmethane diisocyanate and the higher functionality polymethylene polyphenyl isocyanates.
Claim 24
Dependent Claim
67 words
A composition board product comprising a compression molded lignocellulosic composition comprising lignocellulosic particles and from about 1.5 to 12weight percent based on oven dried lignocellulosic particles employed of an adhesive binder composition, said binder composition being a mixture of from about 20 to 95 weight percent organic di- or polyisocyanate and from 5 to 80 weight percent liquid dialkyl carbonate having from 3 to 11 carbon atoms.
Claim 25
Dependent Claim
67 words
A composition board product comprising a compression molded lignocellulosic composition comprising lignocellulosic particles and from about 1.5 to 12weight percent based on oven dried lignocellulosic particles employed of an adhesive binder composition, said binder composition being a mixture of from about 20 to 95 weight percent organic di- or polyisocyanate and from 5 to 80 weight percent liquid dialkyl carbonate having from 3 to 11 carbon atoms.
Claim 26
Dependent Claim
26 words
The composition board product of claim 22 wherein from 0 to 60 weight percent lignin based on the total adhesive binder composition is added as diluent.
Claim 27
Dependent Claim
16 words
The board product of claim 22 wherein the compression molded lignocellulosic composition is wood particle board.
Claim 28
Independent Claim
152 words
A method for the preparation of lignocellulosic composite articles comprising the steps of (a) mixing together lignocellulosic particles and from about 1.5 to 12 weight percent based on oven dried lignocellulosic particles of an adhesive binder composition comprising from 20 to 95 weight percent organic di-and polyisocyanate and from about 5 to 80 weight percent liquid dialkyl carbonate having from 3 to 11 carbon atoms to form a moldable composition; (b) introducing said moldable composition onto a metal mold, caul plate or platen which has been sprayed or coated with a release agent; (c) compression shaping said composition at temperatures of between about 140° C. to 220° C. at pressures of from about 100 to 600 psi for a period of from 1 to 10 minutes to form a composite article of desired shape and/or thickness; and (d) thereafter releasing said lignocellulosic composite article from said metal mold, caul plate or platen.
Claim 29
Independent Claim
152 words
A method for the preparation of lignocellulosic composite articles comprising the steps of (a) mixing together lignocellulosic particles and from about 1.5 to 12 weight percent based on oven dried lignocellulosic particles of an adhesive binder composition comprising from 20 to 95 weight percent organic di-and polyisocyanate and from about 5 to 80 weight percent liquid dialkyl carbonate having from 3 to 11 carbon atoms to form a moldable composition; (b) introducing said moldable composition onto a metal mold, caul plate or platen which has been sprayed or coated with a release agent; (c) compression shaping said composition at temperatures of between about 140° C. to 220° C. at pressures of from about 100 to 600 psi for a period of from 1 to 10 minutes to form a composite article of desired shape and/or thickness; and (d) thereafter releasing said lignocellulosic composite article from said metal mold, caul plate or platen.
Claim 30
Dependent Claim
63 words
A method according to claim 25 wherein 2.5 to 6.5 weight percent adhesive binder composition is employed and comprises from 50 to 75 weight percent organic di-or polyisocyanates and from 50 to 25 weight percent carbonate, the release agent is a metallic soap, the compression temperature is between 160° C. to 190° C. and the time period is from 3 to 5 minutes.
Claim 31
Dependent Claim
26 words
A method according to claim 25 wherein the binder composition is a mixture of diphenylmethane diisocyanate and the higher functionality polymethylene polyphenyl isocyanates and diethyl carbonate.
Claim 32
Dependent Claim
16 words
A method according to claim 25 wherein the compression molded lignocellulosic composition is wood particle board.
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) | 1985-08-16 | 1986-02-15 | 1986-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-08-16 | 1990-02-15 | 1990-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-08-16 | 1994-02-15 | 1994-08-17 | $7700.00 | Window Closed / Lapsed |