Patent US2258643A successfully refreshed from Google Patents.
US4131581A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adhesive compositions consisting essentially of a vinyl alcohol polymer, a crystalline solvent and a viscosity reducing diluent
Assignee: EIDP Inc
•
Filing: 1977-03-14
•
Granted: 1978-12-26
•
Expires: 1997-03-14
Abstract
Abstract Adhesives consisting essentially of polyvinyl alcohol or ethylene/vinyl alcohol copolymer, a crystalline solvent for the polymer component (such as urea, thiourea, acetamide, ammonium formate, etc.) and a viscosity reducing diluent (such as water, glycols, etc.) are disclosed. The adhesives are particularly suitable for cellulosic substrates and provide excellent ambient temperature water resistance while being fully repulpable in hot water.
Inventors
- 👤 James N. Coker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:55
CPC Classifications
C; C09; C09J; C09J129/00; C09J129/02; C09J129/04; C08; C08K; C08K3/00; C08K3/02; C08K3/04; C08K3/18; C08K3/24; C08K3/26; C08K3/30; C08K3/34; C08K3/36; C08K5/00; C08K5/04; C08K5/05; C08K5/09; C08K5/16; C08K5/20; C08K5/21; C08K5/36; C08K5/37; C08K5/41; C08L; C08L29/00; C08L29/02; C08L29/04; C08L3/00; C08L3/02; C08L57/00; C08L2666/00; C08L2666/02; C08L2666/28; C08L2666/54; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31895
Claims Analysis
Total Claims: 46
Claim 1
Independent Claim
222 words
An adhesive composition consisting essentially of (1) about 2 to 35 percent by weight of a polymer selected from the group consisting of polyvinyl alcohol and ethylene/vinyl alcohol copolymers containing at least 50 mol percent vinyl alcohol, (2) about 10 to 80 percent by weight of at least one solvent for said polymer, which solvent is crystalline at 40° C. and is selected from the group consisting of urea, solid alkyl substituted ureas containing a total of up to 9 carbon atoms, thiourea, biuret, ε-caprolactam, solid aliphatic amides containing up to 6 carbon atoms, solid polyhydric compounds and ammonium carboxylate salts, (3) about 5 to 80 percent by weight of at least one viscosity reducing diluent selected from the group consisting of water, liquid polyhydric compounds, liquid alkyl substituted ureas having up to 9 carbon atoms in the alkyl group, liquid aliphatic amides containing up to 6 carbon atoms, and dimethyl sulfoxide, and (4) 0 to about 60 percent by weight extender selected from the group consisting of starch, dextrin, clay, silica, carbon black, talc, calcium carbonate, barium sulfate and vinyl polymer latices, provided that when said adhesive composition is a suspension the polymer is polyvinyl alcohol which has a cold water solubles content of less than 10 percent by weight at 25° C. while being soluble in 80° C.-100° C. water.
Claim 2
Dependent Claim
222 words
An adhesive composition consisting essentially of (1) about 2 to 35 percent by weight of a polymer selected from the group consisting of polyvinyl alcohol and ethylene/vinyl alcohol copolymers containing at least 50 mol percent vinyl alcohol, (2) about 10 to 80 percent by weight of at least one solvent for said polymer, which solvent is crystalline at 40° C. and is selected from the group consisting of urea, solid alkyl substituted ureas containing a total of up to 9 carbon atoms, thiourea, biuret, ε-caprolactam, solid aliphatic amides containing up to 6 carbon atoms, solid polyhydric compounds and ammonium carboxylate salts, (3) about 5 to 80 percent by weight of at least one viscosity reducing diluent selected from the group consisting of water, liquid polyhydric compounds, liquid alkyl substituted ureas having up to 9 carbon atoms in the alkyl group, liquid aliphatic amides containing up to 6 carbon atoms, and dimethyl sulfoxide, and (4) 0 to about 60 percent by weight extender selected from the group consisting of starch, dextrin, clay, silica, carbon black, talc, calcium carbonate, barium sulfate and vinyl polymer latices, provided that when said adhesive composition is a suspension the polymer is polyvinyl alcohol which has a cold water solubles content of less than 10 percent by weight at 25° C. while being soluble in 80° C.-100° C. water.
Claim 3
Dependent Claim
77 words
The composition of claim 1 wherein said adhesive composition is a homogeneous system consisting essentially of about 10 to 35 percent by weight of a polymer selected from the group consisting of polyvinyl alcohol and ethylene/vinyl alcohol copolymers containing at least 50 mol percent vinyl alcohol, about 40 to 80 percent by weight of at least one crystalline solvent for said polymer, and about 5 to 45 percent by weight of at least one viscosity reducing diluent.
Claim 4
Dependent Claim
55 words
The composition of claim 2 wherein said crystalline solvent for the polymer is selected from the group consisting of urea, solid alkyl substituted ureas containing a total of up to 9 carbon atoms, thiourea, biuret, ε-caprolactam, solid aliphatic amides containing up to 6 carbon atoms, pentaerythritol, sorbitol, mannitol and tris(hydroxymethyl) aminomethane, and ammonium carboxylate salts.
Claim 5
Dependent Claim
16 words
The composition of claim 3 wherein said crystalline solvent for the polymer is urea, or ε-caprolactam.
Claim 6
Dependent Claim
14 words
The composition of claim 4 wherein said crystalline solvent for the polymer is urea.
Claim 7
Dependent Claim
33 words
The composition of claim 3 wherein said polyvinyl alcohol is at least 99 percent hydrolyzed and has a 4 percent aqueous viscosity at 20° C. of from about 10 to about 65 centipoises.
Claim 8
Dependent Claim
26 words
The composition of claim 6 wherein said polyvinyl alcohol has a 4 percent aqueous viscosity at 20° C. of from about 12 to about 14 centipoises.
Claim 9
Dependent Claim
26 words
The composition of claim 6 wherein said polyvinyl alcohol has a 4 percent aqueous viscosity at 20° C. of from about 25 to about 31 centipoises.
Claim 10
Dependent Claim
39 words
The composition of claim 6 wherein said polyvinyl alcohol has a degree of hydrolysis of from about 99.0 to about 99.8 percent and a 4 percent aqueous viscosity at 20° C. of from about 28 to about 32 centipoises.
Claim 11
Dependent Claim
111 words
The composition of claim 3 wherein said viscosity reducing diluent is selected from the group consisting of water, liquid glycols, liquid glycol ethers wherein the alkyl group contains 1 to 4 carbon atoms, liquid glycol esters wherein the acyl group contains 2 to 4 carbon atoms, liquid polyalkylene oxides having a molecular weight of up to about 1000, their liquid alkyl ethers wherein the alkyl group contains 1 to 4 carbon atoms, their liquid esters wherein the acyl group contains 2 to 4 carbon atoms, liquid alkyl substituted ureas having up to 9 carbon atoms in the alkyl group, liquid aliphatic amides containing up to 6 carbon atoms, and dimethyl sulfoxide.
Claim 12
Dependent Claim
27 words
The composition of claim 10 wherein said viscosity reducing diluent is selected from the group consisting of water and liquid glycols having 2 to 9 carbon atoms.
Claim 13
Dependent Claim
32 words
The composition of claim 10 wherein said viscosity reducing diluent is selected from the group consisting of water, ethylene glycol, propylene glycol, diethylene glycol, dipropylene glycol, triethylene glycol, dimethyl sulfoxide, and formamide.
Claim 14
Dependent Claim
46 words
The composition of claim 3 containing about 1 to 5 percent by weight, based upon adhesive solids, of a wetting agent selected from the group consisting of sodium lauryl sulfate, polyethylene oxide-alkyl phenol adducts and their phosphate ethers, quaternary ammonium salts, alkali phosphates and sodium nitrilotriacetate.
Claim 15
Dependent Claim
120 words
A curable homogeneous adhesive composition consisting essentially of the composition of claim 3 and a curing agent selected from the group consisting of (a) about 2 percent titanium citrate and about 2 to 4 percent glycollic or citric acid, based upon the weight of the adhesive, and (b) about 1 to 20 percent, based upon the weight of the adhesive, of a resole prepared by heating for about 15 minutes at about 90° C. to 95° C. about 1 part by weight of resorcinol, about 1 part by weight of urea and about 1 to 3 parts by weight of 37 percent formalin, provided that curing agent (b) is employed only in adhesives wherein the viscosity reducing diluent is water.
Claim 16
Dependent Claim
42 words
The composition of claim 3 containing in addition up to about 10 percent by weight of at least one extender selected from the group consisting essentially of starch, dextrin, clay, silica, carbon black, talc, calcium carbonate, barium sulfate and vinyl polymer latices.
Claim 17
Dependent Claim
20 words
A structure comprising at least two cellulosic substrates bonded together by means of the homogeneous adhesive composition of claim 3.
Claim 18
Dependent Claim
16 words
The structure of claim 16 wherein the crystalline solvent for the polymer is urea or ε-caprolactam.
Claim 19
Dependent Claim
86 words
The composition of claim 1 wherein said adhesive composition is a heterogeneous system consisting essentially of about 5 to 25 percent by weight of a polymer selected from the group consisting of polyvinyl alcohol and ethylene/vinyl alcohol copolymers containing at least 50 mol percent vinyl alcohol, about 10 to 45 percent by weight of at least one crystalline solvent for said polymer, and about 20 to 40 percent by weight of at least one viscosity reducing diluent, and about 5 to 60 percent by weight extender.
Claim 20
Dependent Claim
55 words
The composition of claim 18 wherein said crystalline solvent for the polymer is selected from the group consisting of urea, solid alkyl substituted ureas containing a total of up to 9 carbon atoms, thiourea, biuret, ε-caprolactam, solid aliphatic amides containing up to 6 carbon atoms, pentaerythritol, sorbitol, mannitol and tris(hydroxymethyl) aminomethane, and ammonium carboxylate salts.
Claim 21
Dependent Claim
16 words
The composition of claim 19 wherein said crystalline solvent for the polymer is urea, or ε-caprolactam.
Claim 22
Dependent Claim
14 words
The composition of claim 20 wherein said crystalline solvent for the polymer is urea.
Claim 23
Dependent Claim
33 words
The composition of claim 19 wherein said polyvinyl alcohol is at least 99 percent hydrolyzed and has a 4 percent aqueous viscosity at 20° C. of from about 10 to about 65 centipoises.
Claim 24
Dependent Claim
26 words
The composition of claim 20 wherein said polyvinyl alcohol has a 4 percent aqueous viscosity at 20° C. of from about 12 to about 14 centipoises.
Claim 25
Dependent Claim
26 words
The composition of claim 20 wherein said polyvinyl alcohol has a 4 percent aqueous viscosity at 20° C. of from about 25 to about 31 centipoises.
Claim 26
Dependent Claim
39 words
The composition of claim 20 wherein said polyvinyl alcohol has a degree of hydrolysis of from about 99.0 to about 99.8 percent and a 4 percent aqueous viscosity at 20° C. of from about 28 to about 32 centipoises.
Claim 27
Dependent Claim
111 words
The composition of claim 19 wherein said viscosity reducing diluent is selected from the group consisting of water, liquid glycols, liquid glycol ethers wherein the alkyl group contains 1 to 4 carbon atoms, liquid glycol esters wherein the acyl group contains 2 to 4 carbon atoms, liquid polyalkylene oxides having a molecular weight of up to about 1000, their liquid alkyl ethers wherein the alkyl group contains 1 to 4 carbon atoms, their liquid esters wherein the acyl group contains 2 to 4 carbon atoms, liquid alkyl substituted ureas having up to 9 carbon atoms in the alkyl group, liquid aliphatic amides containing up to 6 carbon atoms, and dimethyl sulfoxide.
Claim 28
Dependent Claim
32 words
The composition of claim 26 wherein said viscosity reducing diluent is selected from the group consisting of water, ethylene glycol, propylene glycol, diethylene glycol, dipropylene glycol, triethylene glycol, dimethyl sulfoxide, and formamide.
Claim 29
Dependent Claim
12 words
The composition of claim 27 wherein said viscosity reducing diluent is water.
Claim 30
Dependent Claim
20 words
A structure comprising at least two cellulosic substrates bonded together by means of the heterogeneous adhesive composition of claim 19.
Claim 31
Dependent Claim
16 words
The structure of claim 29 wherein the crystalline solvent for the polymer is urea or ε-caprolactam.
Claim 32
Dependent Claim
83 words
The composition of claim 1 wherein said adhesive composition is a suspension consisting essentially of about 2 to 35 percent by weight of polyvinyl alcohol, said polyvinyl alcohol having a cold water solubles content of less than 10 percent by weight at 25° C. while being soluble in 80° C.-100° C. water; about 15 to 68 percent by weight of at least one crystalline solvent for said polymer; and about 30 to 80 percent by weight of at least one viscosity reducing diluent.
Claim 33
Dependent Claim
55 words
The composition of claim 31 wherein said crystalline solvent for the polymer is selected from the group consisting of urea, solid alkyl subsyituted ureas containing a total of up to 9 carbon atoms, thiourea, biuret, ε-caprolactam, solid aliphatic amides containing up to 6 carbon atoms, pentaerythritol, sorbitol, mannitol and tris(hydroxymethyl) aminomethane, and ammonium carboxylate salts.
Claim 34
Dependent Claim
16 words
The composition of claim 32 wherein said crystalline solvent for the polymer is urea or ε-caprolactam.
Claim 35
Dependent Claim
14 words
The composition of claim 33 wherein said crystalline solvent for the polymer is urea.
Claim 36
Dependent Claim
33 words
The composition of claim 32 wherein said polyvinyl alcohol is at least 99 percent hydrolyzed and has a 4 percent aqueous viscosity at 20° C. of from about 10 to about 65 centipoises.
Claim 37
Dependent Claim
26 words
The composition of claim 35 wherein said polyvinyl alcohol has a 4 percent aqueous viscosity at 20° C. of from about 12 to about 14 centipoises.
Claim 38
Dependent Claim
26 words
The composition of claim 35 wherein said polyvinyl alcohol has a 4 percent aqueous viscosity at 20° C. of from about 25 to about 31 centipoises.
Claim 39
Dependent Claim
39 words
The composition of claim 35 wherein said polyvinyl alcohol has a degree of hydrolysis of from about 99.0 to about 99.8 percent and a 4 percent aqueous viscosity at 20° C. of from about 28 to about 32 centipoises.
Claim 40
Dependent Claim
111 words
The composition of claim 32 wherein said viscosity reducing diluent is selected from the group consisting of water, liquid glycols, liquid glycol ethers wherein the alkyl group contains 1 to 4 carbon atoms, liquid glycol esters wherein the acyl group contains 2 to 4 carbon atoms, liquid polyalkylene oxides having a molecular weight of up to about 1000, their liquid alkyl ethers wherein the alkyl group contains 1 to 4 carbon atoms, their liquid esters wherein the acyl group contains 2 to 4 carbon atoms, liquid alkyl substituted ureas having up to 9 carbon atoms in the alkyl group, liquid aliphatic amides containing up to 6 carbon atoms, and dimethyl sulfoxide.
Claim 41
Dependent Claim
32 words
The composition of claim 39 wherein said viscosity reducing diluent is selected from the group consisting of water, ethylene glycol, propylene glycol, diethylene glycol, dipropylene glycol, triethylene glycol, dimethyl sulfoxide, and formamide.
Claim 42
Dependent Claim
12 words
The composition of claim 40 wherein said viscosity reducing diluent is water.
Claim 43
Dependent Claim
15 words
The composition of claim 33 containing about 0.05 to 0.5 percent by weight guar gum.
Claim 44
Dependent Claim
15 words
The composition of claim 41 containing about 0.1 to 0.3 percent by weight guar gum.
Claim 45
Dependent Claim
19 words
A structure comprising at least two cellulosic substrates bonded together by means of the adhesive composition of claim 32.
Claim 46
Dependent Claim
16 words
The structure of claim 44 wherein the crystalline solvent for the polymer is urea or ε-caprolactam.
References Cited (Backward Citations)
US3272675A
Cited
US3250748A
Cited
US3324065A
Cited
US3313637A
Cited
US3374195A
Cited
US3481886A
Cited
US3654247A
Cited
US3632786A
Cited
US3931088A
Cited
US3931088B1
Cited
US3925289A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-12-25 | 1982-06-26 | 1982-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-12-25 | 1986-06-26 | 1986-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-12-25 | 1990-06-26 | 1990-12-26 | $7700.00 | Window Closed / Lapsed |