Agent for Provisionally Sealing Inflatable or Pressurizable Objects and Method for Provisionally Sealing Inflatable or Pressurizable Objects

Abstract

The invention relates to an agent for provisionally sealing inflatable or pressurizable objects, in particular pneumatic vehicle tyres, containing at least one rubber latex and at least a first antifreeze. The invention also relates to a method for provisionally sealing inflatable or pressurizable objects, in particular pneumatic vehicle tyres. The agent has a total solids content of rubber latex and adhesive resin of 3 to 30% by weight and the antifreeze is/are selected from the group consisting of 1,2-propane diol and 1,3-propane diol and 1,2-butane diol and 1,3-butane diol and glycerin and triethylene glycol and 0 to 9% by weight ethylene glycol.

Claims

1.-11. (canceled)

12. A temporary sealing composition comprising at least one rubber latex, at least one tackifying resin and at least two different antifreezes, wherein total solids content of the rubber latex and tackifying resin is from 3% to 30% by weight; wherein the at least two different antifreezes are selected from the group consisting of propane-1,2-diol, propane-1,3-diol, butane-1,2-diol, butane-1,3-diol, glycerol, triethylene glycol and up to 9% by weight of ethylene glycol; and, wherein an article is inflated by blowing or pumping the temporary sealing composition therein.

13. The temporary sealing composition as claimed in claim 12 further comprising at least one surfactant mixture.

14. The temporary sealing composition as claimed in claim 12, wherein the amount of any of the propane-1,2-diol, propane-1,3-diol, butane-1,2-diol, butane-1,3-diol, glycerol, or triethylene glycol is 0.1% to 25% by weight when incorporated, based on the total weight of the temporary sealing composition.

15. The temporary sealing composition as claimed in claim 12, wherein the at least one rubber latex has a solids content of 40% to 75% by weight and is incorporated in the temporary sealing composition in an amount of 3% to 35% by weight, based on the total weight of the temporary sealing composition.

16. The temporary sealing composition as claimed in claim 12, wherein the at least one tackifying resin is incorporated into the temporary sealing composition in an amount of 2% to 20% by weight, based on the total weight of the temporary sealing composition, and wherein the at least one tackifying resin comprises 45% to 60% by weight of an aqueous dispersion.

17. The temporary sealing composition as claimed in claim 12, wherein the at least one tackifying resin is selected from the group consisting of rosins and esters thereof, terpene-phenol resins, alkyne-phenol resins, phenolic resins and coumarone-indene resins.

18. The temporary sealing composition as claimed in claim 12, wherein the article is a motor vehicle pneumatic tire.

19. A temporary sealing composition comprising at least one rubber latex, at least one tackifying resin and at least two different antifreezes, a surfactant mixture, wherein total solids content of the rubber latex and tackifying resin is from 3% to 30% by weight; wherein the surfactant mixture comprises one or more sulfonate surfactants or one or more alkylaryl ether sulfates, and at least one steric surfactant; wherein the at least two different antifreezes are selected from the group consisting of propane-1,2-diol, propane-1,3-diol, butane-1,2-diol, butane-1,3-diol, glycerol, triethylene glycol and up to 9% by weight of ethylene glycol; and, wherein an article is inflated by blowing or pumping the temporary sealing composition therein.

20. The temporary sealing composition as claimed in claim 19, wherein the amount of any of the propane-1,2-diol, propane-1,3-diol, butane-1,2-diol, butane-1,3-diol, glycerol, or triethylene glycol is 0.1% to 25% by weight when incorporated, based on the total weight of the temporary sealing composition.

21. The temporary sealing composition as claimed in claim 19, wherein the at least one rubber latex has a solids content of 40% to 75% by weight and is incorporated in the temporary sealing composition in an amount of 3% to 35% by weight, based on the total weight of the temporary sealing composition.

22. The temporary sealing composition as claimed in claim 19, wherein the at least one tackifying resin is incorporated into the temporary sealing composition in an amount of 2% to 20% by weight, based on the total weight of the temporary sealing composition, and wherein the at least one tackifying resin comprises 45% to 60% by weight of an aqueous dispersion.

23. The temporary sealing composition as claimed in claim 19, wherein the at least one tackifying resin is selected from the group consisting of rosins and esters thereof, terpene-phenol resins, alkyne-phenol resins, phenolic resins and coumarone-indene resins.

24. The temporary sealing composition as claimed in claim 19, wherein the article is a motor vehicle pneumatic tire.

25. A temporary sealing composition comprising at least one rubber latex, at least one tackifying resin and at least two different antifreezes, a surfactant mixture, wherein total solids content of the rubber latex and tackifying resin is from 3% to 30% by weight; wherein the surfactant mixture comprises one or more sulfonate surfactants, one or more alkylaryl ether sulfates, and at least one steric surfactant; wherein the at least two different antifreezes are selected from the group consisting of propane-1,2-diol, propane-1,3-diol, butane-1,2-diol, butane-1,3-diol, glycerol, triethylene glycol and up to 9% by weight of ethylene glycol; and, wherein an article is inflated by blowing or pumping the temporary sealing composition therein

26. The temporary sealing composition as claimed in claim 25, wherein the amount of any of the propane-1,2-diol, propane-1,3-diol, butane-1,2-diol, butane-1,3-diol, glycerol, or triethylene glycol is 0.1% to 25% by weight when incorporated, based on the total weight of the temporary sealing composition.

27. The temporary sealing composition as claimed in claim 25, wherein the at least one rubber latex has a solids content of 40% to 75% by weight and is incorporated in the temporary sealing composition in an amount of 3% to 35% by weight, based on the total weight of the temporary sealing composition.

28. The temporary sealing composition as claimed in claim 25, wherein the at least one tackifying resin is incorporated into the temporary sealing composition in an amount of 2% to 20% by weight, based on the total weight of the temporary sealing composition, and wherein the at least one tackifying resin comprises 45% to 60% by weight of an aqueous dispersion.

29. The temporary sealing composition as claimed in claim 25, wherein the at least one tackifying resin is selected from the group consisting of rosins and esters thereof, terpene-phenol resins, alkyne-phenol resins, phenolic resins and coumarone-indene resins.

30. The temporary sealing composition as claimed in claim 25, wherein the article is a motor vehicle pneumatic tire.

Description

[0063] The invention is to be elucidated in detail with reference to the working examples which follow.

[0064] Sealants from the prior art are identified as comparative examples by “C”. Compositions of the invention are identified by “I”.

[0065] The Brookfield viscosity of the respective sealants was determined.

[0066] In addition, the sealing effect was determined as the maximum leakage rate. The leak is made with the aid of a 6 mm nail at temperatures of −40° C. to +70° C., and the pressure drop proceeding from the tire fill pressure of 2.5 bar is measured. The compositions and results are compiled in table 1.

[0067] Substances Used

[0068] .sup.a) solids content 60% by weight, LATZ natural latex, e.g. Weber & Schaer

[0069] .sup.b) rosin ester, solids content 50% by weight, Tacolyn, Eastman Chemical Company

[0070] .sup.c) aromatically modified terpene resin, Nanolet TO, Yasuhara chemical Co. Ltd

[0071] .sup.d) alkylated (poly)phenol

[0072] .sup.e) anionic disulfonate, active solids content 30% by weight

[0073] .sup.f) sodium trialkylphenol polyethylene glycol ether sulfate

[0074] .sup.g) polyoxyethylene(25) cetylstearyl ether

[0075] .sup.h) solvent: water

[0076] .sup.i) solids content of rubber latex and tackifying resins (a) to (c)

TABLE-US-00001 TABLE 1 Constituents Unit C1 C2 I1 I2 I3 I4 Natural rubber latex .sup.a) % by wt. 60 60 25 25 15 25 Tackifying resin .sup.b) % by wt. — 20 9 8 6 8 Tackifying resin .sup.c) % by wt. 20 — — — — — Aging stabilizer .sup.d) % by wt. — 1 1 1 1 1 Surfactant .sup.e) % by wt. — 1 2 — 2 2 Surfactant .sup.f) % by wt. — — 2 2 2 2 Steric stabilizer .sup.g) % by wt. — — 1 2 — 2 Ethane-1,2-diol % by wt. 20 16 9 9 9 — Propane-1,2-diol % by wt. — — 19 19 14 19 Propane-1,3-diol % by wt. — — — — 5 — Butane-1,3-diol % by wt. — — 12 10 10 20 Glycerol % by wt. — — — 4 10 — Solvent .sup.h) % by wt. — — 20 20 26 21 Solids content .sup.i) % by wt. 45 45 20 20 12 20 Properties Viscosity at 23° C. mPa•s 35 30 16 18 25 20 Max. leakage rate bar/min 1 1.4 2 2 2 2

[0077] With the inventive sealants I1 to I4, it is possible to reliably seal motor vehicle pneumatic tires after damage. As apparent in table 1, the sealants of the invention have a comparatively low viscosity, which gives rise to optimal flow characteristics on use, preferably in a motor vehicle pneumatic tire, and optimal pumpability.

[0078] In addition, the sealant, compared to sealants comprising a greater amount of ethylene glycol, has a zero or reduced hazardous substance potential according to the EU standard (EU no. 1272/2008).