US5443674A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethane dispersions for book binding
Assignee: HB Fuller Licensing and Financing Inc
•
Filing: 1992-08-31
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Granted: 1995-08-22
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Expires: 2012-08-31
Abstract
Abstract A method of binding book blocks to form books is disclosed. The method involves applying an aqueous composition to the spine area of a book block and removing the volatile components of the composition. The composition comprises (1) an aqueous vehicle, a film-forming polymeric resin, and a polyurethane resin or (2) an aqueous polyurethane dispersion or emulsion. The composition may also include an alkaline component. In another embodiment, the composition comprises a mixture of an aqueous, film-forming polymeric latex, an alkaline component to adjust the pH the latex to that of an aqueous polyurethane dispersion, and the aqueous polyurethane dispersion.
Inventors
- 👤 Flavia M. Fresonke
- 👤 Ramesh Mehta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 02:35
CPC Classifications
C; C09; C09J; C09J175/00; C09J175/04; B; B42; B42C; B42C9/00; B42C9/0006; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/0804; C08G18/0819; C08G18/0823; C08G2170/00; C08G2170/20; C08G2170/80; C08L; C08L2666/00; C08L2666/02; C08L2666/04; Y; Y10; Y10S; Y10S156/00; Y10S156/908
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
78 words
A method of binding a book block having a spine area to form a book comprising the step of applying to the spine area of the book block an aqueous composition having a solids content of about 30 to 70 wt-% and comprising: (a) an aqueous vehicle; (b) about 1 to 90 wt-% (based on the solids) of a polymeric, thermoplastic, film-forming resin; and (c) about 10 to 99 wt-% .(based on the solids) of a polyurethane resin.
Claim 2
Independent Claim
78 words
A method of binding a book block having a spine area to form a book comprising the step of applying to the spine area of the book block an aqueous composition having a solids content of about 30 to 70 wt-% and comprising: (a) an aqueous vehicle; (b) about 1 to 90 wt-% (based on the solids) of a polymeric, thermoplastic, film-forming resin; and (c) about 10 to 99 wt-% .(based on the solids) of a polyurethane resin.
Claim 3
Dependent Claim
35 words
The method of claim 1 wherein the film-forming resin is selected from the group consisting of an ethylene-vinyl acetate copolymer, a styrene-butadiene rubber, an acrylic resin, a vinyl acetate/butyl maleate copolymer, and a mixture thereof.
Claim 4
Dependent Claim
15 words
The method of claim 1 wherein the polyurethane resin is a hindered aromatic-aliphatic polyurethane resin.
Claim 5
Dependent Claim
11 words
The method of claim 1 wherein the polyurethane resin is cross-linkable.
Claim 6
Dependent Claim
29 words
The method of claim 1 wherein the aqueous composition further comprises an effective amount of an alkaline component to result in a composition pH of about 7 to 9.
Claim 7
Dependent Claim
23 words
The method of claim 1 wherein the film-forming resin and the polyurethane resin are independently introduced as an aqueous emulsion, dispersion, or suspension.
Claim 8
Independent Claim
93 words
A method of binding a book block having a spine area to form a book comprising the step of applying to the spine area of the book block an aqueous composition having a solids content of about 30 to 70 wt-% and comprising: (a) an aqueous vehicle; (b) about 1 to 90 wt-% (based on the solids) of a polymeric, thermoplastic, film-forming resin; and (c) about 10 to 99 wt-% (based on the solids) of a polyurethane resin said polyurethane resin comprising the reaction product of tetramethylxylene diisocyanate and a dimethylol propionic acid.
Claim 9
Independent Claim
93 words
A method of binding a book block having a spine area to form a book comprising the step of applying to the spine area of the book block an aqueous composition having a solids content of about 30 to 70 wt-% and comprising: (a) an aqueous vehicle; (b) about 1 to 90 wt-% (based on the solids) of a polymeric, thermoplastic, film-forming resin; and (c) about 10 to 99 wt-% (based on the solids) of a polyurethane resin said polyurethane resin comprising the reaction product of tetramethylxylene diisocyanate and a dimethylol propionic acid.
Claim 10
Dependent Claim
35 words
The method of claim 7 wherein the film-forming resin is selected from the group consisting of an ethylene-vinyl acetate copolymer, a styrene-butadiene rubber, an acrylic resin, a vinyl acetate/butyl maleate copolymer, and a mixture thereof.
Claim 11
Dependent Claim
11 words
The method of claim 7 wherein the polyurethane resin is cross-linkable.
Claim 12
Dependent Claim
30 words
The method of claim 7 wherein the aqueous composition further comprises an effective amount of an alkaline amine component to result in a composition pH of about 7 to 9.
Claim 13
Dependent Claim
23 words
The method of claim 7 wherein the film-forming resin and the polyurethane resin are independently introduced as an aqueous emulsion, dispersion, or suspension.
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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) | 1998-08-21 | 1999-02-20 | 1999-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-08-21 | 2003-02-20 | 2003-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-08-21 | 2007-02-20 | 2007-08-22 | $7700.00 | Window Closed / Lapsed |