# US 4,396,756 A · Aldehyde condensate tackifiers for rubber

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- Number: US 4,396,756 A
- Document ID: US4396756A
- Status: Granted
- Kind: A
- Application number: 05/961,719
- Filed: 1978-11-17
- Granted: 1983-08-02
- Earliest claimed: 1976-11-10
- Assignees: BASF SE
- Inventors: Richard Baur; Knut Oppenlaender; Gerhard Paulus; Hubertus Queins; Hubert Schoeppl
- Web page: https://patentgrep.com/patent/US4396756A

## CPC

- C08G 14/06: and monomers containing hydrogen attached to nitrogen
- C08L 21/00: Compositions of unspecified rubbers
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)

## 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.

## Claims

### Claim 1

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 (depends on 1)

A condensation product as claimed in claim 1 wherein said phenol is nonylphenol.

### Claim 3 (depends on 1)

A condensation product as claimed in claim 1 wherein said phenol is octylphenol.

### Claim 4 (depends on 1)

A condensation product as claimed in claim 1, said product having a softening point in the range of 80.degree. to 160.degree. C.