US4376854A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing resorcinol copolymers
Assignee: Hodogaya Chemical Co Ltd
•
Filing: 1982-04-05
•
Granted: 1983-03-15
•
Expires: 2002-04-05
Abstract
Abstract A process for preparing a resorcinol copolymer, comprising at least one specific phenol with formaldehyde at a certain mole ratio to obtain a resol-type precondensate containing 1 to 30% of residual unreacted formaldehyde and then adding said resol-type precondensate to a mixture of an acid catalyst and at least one resorcinol to effect co-condensation. The obtained copolymer is useful for an adhesive for polyester fiber and rubber.
Inventors
- 👤 Toyohiko Yamaguchi
- 👤 Koichi Kashima
- 👤 Nobuo Kaifu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:09
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/04; C08J5/06; C08G; C08G8/00; C08G8/04; C08G8/08; C08G8/24; C08J2321/00; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31786; Y10T428/31794
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
137 words
A process for preparing a resorcinol copolymer, comprising reacting at least one phenol having the general formula, ##STR2## in which R 1 is --CH 3 or --OCH 3 , and R 2 is hydrogen or --CH 3 , with formaldehyde in an amount of 0.6 to 2.4 moles per mole of said phenol, in the presence of an alkaline catalyst, to obtain a resol-type precondensate containing 1 to 30%, based on the initial amount, of residual unreacted formaldehyde, and, then, adding said resol-type precondensate to a mixture of an acid, equivalent to said alkaline catalyst or 10 mol % excess with reference to said phenol, and at least one member selected from the group consisting of resorcinol and lower alkyl-substituted resorcinols, in an amount of 0.4 to 2.5 moles per mole of said phenol, to effect co-condensation.
Claim 2
Dependent Claim
137 words
A process for preparing a resorcinol copolymer, comprising reacting at least one phenol having the general formula, ##STR2## in which R 1 is --CH 3 or --OCH 3 , and R 2 is hydrogen or --CH 3 , with formaldehyde in an amount of 0.6 to 2.4 moles per mole of said phenol, in the presence of an alkaline catalyst, to obtain a resol-type precondensate containing 1 to 30%, based on the initial amount, of residual unreacted formaldehyde, and, then, adding said resol-type precondensate to a mixture of an acid, equivalent to said alkaline catalyst or 10 mol % excess with reference to said phenol, and at least one member selected from the group consisting of resorcinol and lower alkyl-substituted resorcinols, in an amount of 0.4 to 2.5 moles per mole of said phenol, to effect co-condensation.
Claim 3
Dependent Claim
25 words
A process according to claim 1, wherein the alkaline catalyst is used in an amount of 0.01 to 10 mol % based on said phenol.
Claim 4
Dependent Claim
23 words
A process according to claim 2, wherein the amount of the alkaline catalyst is 0.3 to 5 mol % based on said phenol.
Claim 5
Dependent Claim
23 words
A process according to claim 1, wherein the alkaline catalyst is selected from hydroxides and carbonates of alkali metals and alkaline earth metals.
Claim 6
Dependent Claim
16 words
A process according to claim 1, wherein said phenol is selected from m-cresol, 3,5-xylenol and m-methoxyphenol.
Claim 7
Dependent Claim
23 words
A process according to claim 1, wherein the resol-type precondensate contains 2 to 10%, based on the initial amount, of residual unreacted formaldehyde.
Claim 8
Dependent Claim
23 words
A process according to claim 1, wherein formaldehyde is used in an amount of 0.8 to 2.2 moles per mole of said phenol.
Claim 9
Dependent Claim
24 words
A process according to claim 1, wherein the reaction of said phenol with formaldehyde is effected at a temperature of 10° to 90° C.
Claim 10
Dependent Claim
15 words
A process according to claim 8, wherein the reaction temperature is 25° to 70° C.
Claim 11
Dependent Claim
21 words
A process according to claim 1, wherein the reaction of said phenol with formaldehyde is effected for 1 to 24 hours.
Claim 12
Dependent Claim
15 words
A process according to claim 10, wherein the reaction time is 2 to 10 hours.
Claim 13
Dependent Claim
21 words
A process according to claim 1, wherein the alkyl substituent of the lower alkyl-substituted resorcinols has 1 to 4 carbon atoms.
Claim 14
Dependent Claim
27 words
A process according to claim 1, wherein the lower alkyl-substituted resorcinols are selected from 5- methylresorcinol, 5-ethylresorcinol, 5-propylresorcinol, 5-isopropylresorcinol, 5-butylresorcinol and a mixture of lower alkyl-substituted resorcinols.
Claim 15
Dependent Claim
27 words
A process according to claim 1, wherein the acid is selected from hydrochloric acid, sulfuric acid, nitric acid, formic acid, oxalic acid, acetic acid and p-toluenesulfonic acid.
Claim 16
Dependent Claim
21 words
A process according to claim 1, wherein the acid is 0.1 to 3 mol % excess with reference to said phenol.
Claim 17
Dependent Claim
12 words
A resorcinol copolymer produced by the process as claimed in claim 1.
References Cited (Backward Citations)
US2477641A
Cited
US2878198A
Cited
US3437610A
Cited
US3835082A
Cited
US4009304A
Cited
US4112160A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-03-14 | 1986-09-13 | 1987-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-03-14 | 1990-09-13 | 1991-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-03-14 | 1994-09-13 | 1995-03-15 | $7700.00 | Window Closed / Lapsed |