Tackifier for rubber compositions

Patent metadata

Field	Value
Publication number	US-11248118-B2
Application number	US-201716466832-A
Country	US
Kind code	B2
Filing date	Nov 30, 2017
Priority date	Dec 6, 2016
Publication date	Feb 15, 2022
Grant date	Feb 15, 2022

Abstract

A tackifier comprising a resin with repeating units of formula (I) wherein R1 is a linear or branched alkylen group with 1 to 10 carbon atoms and R2 is a linear or branched, saturated or unsaturated aliphatic hydrocarbon group with up to 20 carbon atoms and a non-aromatic compound which consists to at least 50% by weight of one or more linear or branched, saturated or unsaturated aliphatic hydrocarbon groups with at least 4 carbon atoms.

First claim

The invention claimed is:

1. A tackifier, comprising:
a resin with repeating units of the following formula I:

wherein R 1 is a linear or branched alkylen group with 1 to 10 carbon atoms and R 2 is a linear or branched, saturated or unsaturated aliphatic hydrocarbon group with up to 20 carbon atoms; and
a non-aromatic compound comprising at least 50% by weight of one or more linear or branched, saturated or unsaturated aliphatic hydrocarbon groups with at least 4 carbon atoms;
wherein the non-aromatic compound is a fatty acid or a fatty alcohol, and
wherein the tackifier is solid, and wherein the tackifier has a glass transition temperature in the range of 60° C. to 150° C.

2. The tackifier of claim 1 , wherein R 1 in formula I is CH 2 , HC—CH 3 or H 2 C—CH 2 .

3. The tackifier of claim 1 , wherein R 2 in formula I is a linear or branched, saturated or unsaturated aliphatic hydrocarbon group with 4 to 10 carbon atoms.

4. The tackifier of claim 1 , wherein the resin is obtained by reacting acetylene and para tertiary butyl phenol.

5. The tackifier of claim 1 , wherein the non-aromatic compound comprises at least 80% by weight of linear or branched, saturated or unsaturated, aliphatic hydrocarbon groups with from 10 to 60 carbon atoms.

6. The tackifier of claim 1 , wherein the tackifier comprises 0.1 to 50 parts by weight of the non-aromatic compound per 100 parts by weight of the resin of formula I.

7. The tackifier of claim 1 , wherein the tackifier comprises at least 80% by weight of the resin of formula I and the non-aromatic compound.

8. A process of preparing the tackifier of claim 1 , the process comprising:
adding the non-aromatic compound to a melt of the resin, to obtain a mixture, and
converting the obtained mixture into solid granules by pastillation.

9. The process of claim 8 , wherein the melt of the resin is molten and has a temperature of 150 to 250° C.

10. A process of preparing a rubber composition, the process comprising adding the tackifier of claim 1 to the rubber.

11. The tackifier of claim 1 , wherein the resin comprises units of the following formula II:

wherein R 2 in formula II is para tertiary butyl.

12. The tackifier of claim 1 , wherein the resin comprises units of the following formula III:

wherein R 2 in formula III is para tertiary butyl.

13. The process of claim 10 , wherein the tackifier is added to the rubber at a temperature in the range of 60 to 150° C.

Assignees

• Basf Se

Inventors

• Westerhaus Felix Alexander
• Reuter Frank
• Rodewald Dieter
• Fleischel Olivier
• Schlitter Stephan
• Voelkert Martin
• Nimtz Fritz
• Abel Ulrich
• Scherr Guenter

Classifications

• C08G2261/3424

  non-conjugated, e.g. paracyclophanes or xylenes · CPC title

• C08G61/025

  Polyxylylenes · CPC title

• C08L61/04 Primary

  Condensation polymers of aldehydes or ketones with phenols only · CPC title

• C08L65/04

  Polyxylenes · CPC title

• C08G8/12

  with monohydric phenols having only one hydrocarbon substituent ortho on para to the OH group, e.g. p-tert.-butyl phenol · CPC title