Sulfur-crosslinkable rubber-coating mixture

Patent metadata

Field	Value
Publication number	US-2023151214-A1
Application number	US-202017995108-A
Country	US
Kind code	A1
Filing date	Dec 1, 2020
Priority date	Mar 31, 2020
Publication date	May 18, 2023
Grant date	—

Abstract

The invention relates to a sulfur-crosslinkable rubberization mixture for metallic or textile strength members containing at least one novolac resin comprising alkyl urethane units and produced by reaction of a phenolic compound, an aldehyde and a carbamate resin, wherein the carbamate resin is produced by reaction of alkyl urethane with an aldehyde, and at least one etherified melamine resin. The invention further relates to a pneumatic vehicle tire which comprises at least one such sulfur-crosslinked rubberization mixture.For improved durability of the rubberized strength members, the rubberization mixture containsless than 2.5 phr (parts by weight, based on 100 parts by weight of the total rubbers in the mixture) of at least one novolac resin comprising alkyl urethane units and produced by reaction of a phenolic compound, an aldehyde and a carbamate resin, wherein the carbamate resin is produced by reaction of alkyl urethane with an aldehyde, andless than 2.5 phr of at least one etherified melamine resin.

First claim

1 .- 14 . (canceled)

15 . A sulfur-crosslinkable rubberization mixture for metallic or textile strength members, the mixture comprising:
less than 2.5 phr (parts by weight, based on 100 parts by weight of the total rubbers in the mixture) of at least one novolac resin comprising alkyl urethane units and produced by reaction of a phenolic compound, an aldehyde and a carbamate resin, wherein the carbamate resin is produced by reaction of alkyl urethane with an aldehyde; and, less than 2.5 phr of at least one etherified melamine resin.

16 . The sulfur-crosslinkable rubberization mixture as claimed in claim 15 , the mixture comprising:
1.2 to 1.8 phr of the at least one novolac resin comprising alkyl urethane units and produced by reaction of a phenolic compound, an aldehyde and a carbamate resin, wherein the carbamate resin is produced by reaction of alkyl urethane with an aldehyde; and, 1.2 to 1.8 phr of the at least one etherified melamine resin.

17 . The sulfur-crosslinkable rubberization mixture as claimed in claim 15 , wherein the novolac resin and the etherified melamine together are incorporated in an amount of less than 5 phr.

18 . The sulfur-crosslinkable rubberization mixture as claimed in claim 17 , wherein the novolac resin and the etherified melamine together are incorporated in an amount of from 2.5 phr to 3.5 phr.

19 . The sulfur-crosslinkable rubberization mixture as claimed in claim 15 , wherein the mixture is free from resorcinol.

20 . The sulfur-crosslinkable rubberization mixture as claimed in claim 15 , wherein the phenolic compound is phenol.

21 . The sulfur-crosslinkable rubberization mixture as claimed in claim 15 , wherein the alkyl urethane is butyl urethane.

22 . The sulfur-crosslinkable rubberization mixture as claimed in claim 15 , wherein the aldehyde is formaldehyde.

23 . The sulfur-crosslinkable rubberization mixture as claimed in claim 15 , wherein the at least one etherified melamine resin is hexamethoxymethylmelamine (HMMM).

24 . The sulfur-crosslinkable rubberization mixture as claimed in claim 15 , wherein the mixture contains at least one organic cobalt salt.

25 . The sulfur-crosslinkable rubberization mixture as claimed in claim 24 , wherein the mixture contains from 0.2 to 2 phr of the at least one organic cobalt salt.

26 . The sulfur-crosslinkable rubberization mixture as claimed in claim 15 , wherein the mixture contains, as a vulcanization accelerator, from 0.8 to 1.5 phr of benzothiazyl-2-dicyclohexylsulfenamide (DCBS).

27 . The sulfur-crosslinkable rubberization mixture as claimed in claim 26 , wherein the mixture contains less than 0.5 phr of any other vulcanization accelerators.

28 . The sulfur-crosslinkable rubberization mixture as claimed in claim 15 , wherein the mixture contains less than 5 phr of sulfur.

29 . The sulfur-crosslinkable rubberization mixture as claimed in claim 15 , wherein the novolac resin and the etherified melamine resin are incorporated into the mixture in a weight ratio of from 1:1.5 to 1.5:1.

30 . The sulfur-crosslinkable rubberization mixture as claimed in claim 29 , wherein the novolac resin and the etherified melamine resin are incorporated into the mixture in a weight ratio of 1:1.

31 . A pneumatic vehicle tire comprising the sulfur-crosslinked rubberization mixture as claimed in claim 15 .

32 . The pneumatic vehicle tire as claimed in claim 31 , wherein the pneumatic vehicle tire comprises a carcass rubberization composed of the sulfur-crosslinkable rubberization mixture.

33 . The pneumatic vehicle tire as claimed in claim 31 , wherein the pneumatic vehicle tire comprises a bandage rubberization composed of the sulfur-crosslinkable rubberization mixture.

34 . The pneumatic vehicle tire as claimed in claim 31 , wherein the pneumatic vehicle tire comprises a belt rubberization composed of the sulfur-crosslinkable rubberization mixture.

Assignees

• Continental Reifen Deutschland Gmbh

Inventors

• Eichhorst Christoph
• Rajan Vipin
• Schmaunz-Hirsch Cornelia
• Kramer Thomas
• Recker Carla

Classifications

• B60C1/00

  Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition · CPC title

• C08L7/00 Primary

  Compositions of natural rubber · CPC title

• B60C2001/0066

  Compositions of the belt layers · CPC title

• B60C2001/0083

  Compositions of the cap ply layers · CPC title

• C08L75/08 Primary

  from polyethers · CPC title