US3998906A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adhesive composition
Assignee: Research Corp
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Filing: 1975-01-21
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Granted: 1976-12-21
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Expires: 1995-01-21
Abstract
Abstract An aldehyde condensation copolymer is disclosed which is formed by co-condensing A. 90% - 10% by weight of an essentially linear non-crosslinkable aldehyde condensation prepolymer with B. 10% - 90% by weight of a highly thermosettable and crosslinkable aldehyde condensation prepolymer.
Inventors
- 👤 James T. Rice
- 👤 Chia M. Chen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:58
CPC Classifications
C; C08; C08G; C08G12/00; C08G12/02; C08G8/00; C08G8/04; C09; C09J; C09J161/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
260 words
An aldehyde-phenolic condensation copolymer product formed by the method which comprises: forming an essentially linear and non-cross-linkable aldehyde condensation prepolymer having a viscosity of 5 cps to 75 cps at 25° C by reacting an aldehyde selected from the group consisting of formaldehyde acetaldehyde, benzaldehyde, propionaldehyde, butyraldehyde, furfuraldehyde, and mixtures thereof with a phenolic compound selected from the group consisting of phenol, resorcinol, xylenol and cresol in a mole ratio of aldehyde to phenolic compound of 0.5 : 1 to 1.5 : 1 in water in amounts of 25% to 75% based on the total weight of materials in the presence of a catalyst of the hydroxide or carbonate compounds of alkali metals or alkaline earth metals, ammonium hydroxide or ammonium carbonate; forming a highly thermosettable and cross-linkable aldehyde condensation prepolymer having a viscosity of 5 cps to 75 cps at 25° C by reacting said aldehyde with said phenolic compound in a mole ratio of aldehyde to phenolic compound of 2.0 : 1 to 3.0 : 1 in water in amounts of 25% to 75% based on the total weight of materials in the presence of said catalyst; admixing from 90% to 10% by weight of said linear aldehyde prepolymer with 10% to 90% by weight of said highly thermosettable prepolymer; and copolymerizing said admixture at a temperature of 60° C to the reflux temperature in the presence of said base in amounts of 0.05 to 0.8 moles per mole of phenolic compound which results in a copolymer having a viscosity of 30 to 3000 cps at 25° C.
Claim 2
Dependent Claim
260 words
An aldehyde-phenolic condensation copolymer product formed by the method which comprises: forming an essentially linear and non-cross-linkable aldehyde condensation prepolymer having a viscosity of 5 cps to 75 cps at 25° C by reacting an aldehyde selected from the group consisting of formaldehyde acetaldehyde, benzaldehyde, propionaldehyde, butyraldehyde, furfuraldehyde, and mixtures thereof with a phenolic compound selected from the group consisting of phenol, resorcinol, xylenol and cresol in a mole ratio of aldehyde to phenolic compound of 0.5 : 1 to 1.5 : 1 in water in amounts of 25% to 75% based on the total weight of materials in the presence of a catalyst of the hydroxide or carbonate compounds of alkali metals or alkaline earth metals, ammonium hydroxide or ammonium carbonate; forming a highly thermosettable and cross-linkable aldehyde condensation prepolymer having a viscosity of 5 cps to 75 cps at 25° C by reacting said aldehyde with said phenolic compound in a mole ratio of aldehyde to phenolic compound of 2.0 : 1 to 3.0 : 1 in water in amounts of 25% to 75% based on the total weight of materials in the presence of said catalyst; admixing from 90% to 10% by weight of said linear aldehyde prepolymer with 10% to 90% by weight of said highly thermosettable prepolymer; and copolymerizing said admixture at a temperature of 60° C to the reflux temperature in the presence of said base in amounts of 0.05 to 0.8 moles per mole of phenolic compound which results in a copolymer having a viscosity of 30 to 3000 cps at 25° C.
Claim 3
Dependent Claim
31 words
The copolymer product of claim 1, wherein the mole ratio of said aldehyde to said phenolic compound in said highly thermosettable prepolymer ranges from 2.4 : 1 to 2.8 : 1.
Claim 4
Dependent Claim
13 words
The copolymer product of claim 1, wherein said prepolymers are phenolformaldehyde condensation polymers.
Claim 5
Dependent Claim
236 words
An aldehyde-phenolic condensation copolymer product formed by the method which comprises the steps of: forming an essentially linear and non-cross-linkable aldehyde condensation prepolymer having a viscosity of 5 cps to 75 cps at 25° C by reacting an aldehyde selected from the group consisting of formaldehyde, acetaldehyde, benzaldehyde, propionaldehyde, butyraldehyde, furfuraldehyde, and mixtures thereof with a phenolic compound selected from the group consisting of phenol, resorcinol, xylenol and cresol in a mole ratio of aldehyde to phenolic compound of 0.5 : 1 to 1.5 : 1 in water in amounts of 25% to 75% based on the total weight of materials in the presence of a catalyst of the hydroxide or carbonate compounds of alkali metals or alkaline earth metals, ammonium hydroxide or ammonium carbonate; condensing from 90% - 10% by weight of said linear and non-cross-linkable aldehyde condensation prepolymer with 10% to 90% by weight of the components of a highly thermosettable and cross-linkable aldehyde condensation prepolymer of an aldehyde and a phenolic compound in the presence of said catalyst in 25% to 75% water based on the total weight of materials at a temperature less than 70° C until all of said aldehyde has reacted, wherein the mole ratio of said aldehyde and phenolic compound is 2.0 : 1 to 3.0 : 1; and continuing said condensation reaction until a copolymer is obtained having a viscosity of 30 to 3,000 cps at 25° C.
Claim 6
Dependent Claim
236 words
An aldehyde-phenolic condensation copolymer product formed by the method which comprises the steps of: forming an essentially linear and non-cross-linkable aldehyde condensation prepolymer having a viscosity of 5 cps to 75 cps at 25° C by reacting an aldehyde selected from the group consisting of formaldehyde, acetaldehyde, benzaldehyde, propionaldehyde, butyraldehyde, furfuraldehyde, and mixtures thereof with a phenolic compound selected from the group consisting of phenol, resorcinol, xylenol and cresol in a mole ratio of aldehyde to phenolic compound of 0.5 : 1 to 1.5 : 1 in water in amounts of 25% to 75% based on the total weight of materials in the presence of a catalyst of the hydroxide or carbonate compounds of alkali metals or alkaline earth metals, ammonium hydroxide or ammonium carbonate; condensing from 90% - 10% by weight of said linear and non-cross-linkable aldehyde condensation prepolymer with 10% to 90% by weight of the components of a highly thermosettable and cross-linkable aldehyde condensation prepolymer of an aldehyde and a phenolic compound in the presence of said catalyst in 25% to 75% water based on the total weight of materials at a temperature less than 70° C until all of said aldehyde has reacted, wherein the mole ratio of said aldehyde and phenolic compound is 2.0 : 1 to 3.0 : 1; and continuing said condensation reaction until a copolymer is obtained having a viscosity of 30 to 3,000 cps at 25° C.
Claim 7
Dependent Claim
231 words
An aldehyde-phenolic condensation copolymer product formed by the method which comprises the steps of: forming a highly thermosettable and cross-linkable aldehyde condensation prepolymer having a viscosity of 5 cps to 75 cps at 25° C by reacting an aldehyde selected from the group consisting of formaldehyde, acetaldehyde, benzaldehyde, propionaldehyde, butyraldehyde, furfuraldehyde and mixtures thereof with a phenolic compound selected from the group consisting of phenol, resorcinol, xylenol and cresol in a mole ratio of aldehyde to phenolic compound of 2.0 : 1 to 3.0 : 1 in water in amounts of 25% to 75% based on the total weight of materials in the presence of a catalyst of the hydroxide or carbonate compounds of alkali metals or alkaline earth metals, ammonium hydroxide or ammonium carbonate; condensing from 10% - 90% by weight of said highly thermosettable prepolymer with 90% - 10% by weight of the components of an essentially linear and non-cross-linkable aldehyde condensation prepolymer of an aldehyde and a phenolic compound in the presence of said catalyst in 25% to 75% water based on the total weight of materials at a temperature less than 70° C until all of said aldehyde has reacted, wherein the mole ratio of said aldehyde and phenolic compound is 0.5 to 1.5 : 1, and continuing said condensation reaction until a copolymer is obtained having a viscosity of 30 to 3,000 cps at 25° C.
Claim 8
Dependent Claim
231 words
An aldehyde-phenolic condensation copolymer product formed by the method which comprises the steps of: forming a highly thermosettable and cross-linkable aldehyde condensation prepolymer having a viscosity of 5 cps to 75 cps at 25° C by reacting an aldehyde selected from the group consisting of formaldehyde, acetaldehyde, benzaldehyde, propionaldehyde, butyraldehyde, furfuraldehyde and mixtures thereof with a phenolic compound selected from the group consisting of phenol, resorcinol, xylenol and cresol in a mole ratio of aldehyde to phenolic compound of 2.0 : 1 to 3.0 : 1 in water in amounts of 25% to 75% based on the total weight of materials in the presence of a catalyst of the hydroxide or carbonate compounds of alkali metals or alkaline earth metals, ammonium hydroxide or ammonium carbonate; condensing from 10% - 90% by weight of said highly thermosettable prepolymer with 90% - 10% by weight of the components of an essentially linear and non-cross-linkable aldehyde condensation prepolymer of an aldehyde and a phenolic compound in the presence of said catalyst in 25% to 75% water based on the total weight of materials at a temperature less than 70° C until all of said aldehyde has reacted, wherein the mole ratio of said aldehyde and phenolic compound is 0.5 to 1.5 : 1, and continuing said condensation reaction until a copolymer is obtained having a viscosity of 30 to 3,000 cps at 25° C.
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) | 1979-12-21 | 1980-06-21 | 1980-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-12-21 | 1984-06-21 | 1984-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-12-21 | 1988-06-21 | 1988-12-21 | $7700.00 | Window Closed / Lapsed |