Patent US3086286A successfully refreshed from Google Patents.
Patent US2479142A successfully refreshed from Google Patents.
Patent US4396756A successfully refreshed from Google Patents.
US4396756A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aldehyde condensate tackifiers for rubber
Assignee: BASF SE
•
Filing: 1978-11-17
•
Granted: 1983-08-02
•
Expires: 1998-11-17
Abstract
Abstract Condensation products of aniline, a phenol or alkylated phenol and an aldehyde, especially formaldehyde, may be used as tackifiers and aging retardants for rubber, especially natural rubber.
Inventors
- 👤 Richard Baur
- 👤 Knut Oppenlaender
- 👤 Gerhard Paulus
- 👤 Hubertus Queins
- 👤 Hubert Schoeppl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 06:03
CPC Classifications
C; C08; C08G; C08G14/00; C08G14/02; C08G14/04; C08G14/06; C08L; C08L21/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
79 words
A condensation product useful as a tackifying agent in rubber compositions, said product being the condensation product of octylphenol or nonylphenol, aniline, and formaldehyde under acid or alkaline conditions and containing per mol of said octyl- or nonylphenol, from 0.2 to 1 mole of aniline and from 0.8 to 2 moles of formaldehyde, the mole ratio of the sum of the moles of aniline and said octyl- or nonylphenol to the moles of formaldehyde being from 1:0.5 to 1:1.
Claim 2
Dependent Claim
79 words
A condensation product useful as a tackifying agent in rubber compositions, said product being the condensation product of octylphenol or nonylphenol, aniline, and formaldehyde under acid or alkaline conditions and containing per mol of said octyl- or nonylphenol, from 0.2 to 1 mole of aniline and from 0.8 to 2 moles of formaldehyde, the mole ratio of the sum of the moles of aniline and said octyl- or nonylphenol to the moles of formaldehyde being from 1:0.5 to 1:1.
Claim 3
Dependent Claim
13 words
A condensation product as claimed in claim 1 wherein said phenol is nonylphenol.
Claim 4
Dependent Claim
13 words
A condensation product as claimed in claim 1 wherein said phenol is octylphenol.
Claim 5
Dependent Claim
22 words
A condensation product as claimed in claim 1, said product having a softening point in the range of 80° to 160° C.
References Cited (Backward Citations)
US4020048A
Cited
US4146512A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-08-01 | 1987-01-31 | 1987-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-01 | 1991-01-31 | 1991-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-01 | 1995-01-31 | 1995-08-02 | $7700.00 | Window Closed / Lapsed |