EP4426547A1 - Harzfreies dichtmittel zum provisorischen abdichten von fahrzeugluftreifen, dichtmittelbehälter umfassend ein solches, verfahren zum provisorischen abdichten eines fahrzeugluftreifens sowie die verwendung - Google Patents
Harzfreies dichtmittel zum provisorischen abdichten von fahrzeugluftreifen, dichtmittelbehälter umfassend ein solches, verfahren zum provisorischen abdichten eines fahrzeugluftreifens sowie die verwendungInfo
- Publication number
- EP4426547A1 EP4426547A1 EP22800079.0A EP22800079A EP4426547A1 EP 4426547 A1 EP4426547 A1 EP 4426547A1 EP 22800079 A EP22800079 A EP 22800079A EP 4426547 A1 EP4426547 A1 EP 4426547A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sealant
- resin
- sealing
- free
- weight
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C73/00—Repairing of articles made from plastics or substances in a plastic state, e.g. of articles shaped or produced by using techniques covered by this subclass or subclass B29D
- B29C73/16—Auto-repairing or self-sealing arrangements or agents
- B29C73/163—Sealing compositions or agents, e.g. combined with propellant agents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C73/00—Repairing of articles made from plastics or substances in a plastic state, e.g. of articles shaped or produced by using techniques covered by this subclass or subclass B29D
- B29C73/16—Auto-repairing or self-sealing arrangements or agents
- B29C73/166—Devices or methods for introducing sealing compositions into articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2007/00—Use of natural rubber as moulding material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/0005—Condition, form or state of moulded material or of the material to be shaped containing compounding ingredients
- B29K2105/0047—Agents changing thermal characteristics
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/0058—Liquid or visquous
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2030/00—Pneumatic or solid tyres or parts thereof
Definitions
- Resin-free sealant for temporarily sealing vehicle tires sealant container comprising such a method for temporarily sealing a vehicle tire and the use
- the invention relates to a resin-free sealant for temporarily sealing vehicle tires according to the preamble of patent claim 1 and a sealant container with such according to the preamble of patent claim 8.
- the invention also relates to a method for temporarily sealing vehicle tires according to the preamble of patent claim 9 and the use of such a sealant according to the preamble of patent claim 10.
- Pneumatic vehicle tires can suffer damage in the form of cracks when driving over sharp objects, which can lead to a loss of air pressure in the tire.
- sealing agents or sealants are known in the prior art, which can be inserted into the tire after the valve insert has been unscrewed or directly via the valve, for example with the help of a breakdown kit be introduced.
- Such a breakdown assistance set usually has a pressure source and a sealant container or at least one connection for a sealant container. Alternatively, the sealant is squeezed directly from the container into the tire by the user.
- EP 3 227 097 B1 discloses a means for sealing with a rubber latex, adhesive resin and antifreeze.
- a disadvantage of the sealants described in the prior art is that the compositions do not exhibit the desired properties in relation to the sealing performance for a tire. This is where the present invention comes in.
- the present invention is based on the object of providing an improved sealant which has improved performance, in particular with regard to pumpability and sealing performance.
- the object of the present invention is to provide an improved sealant container with a sealant, through which a pneumatic vehicle tire is better sealed.
- the object of the invention is achieved by a resin-free sealant for the temporary sealing of pneumatic vehicle tires with the features of claim 1. Furthermore, the object is achieved by a sealant container with the features of claim 8 and by a method for temporarily sealing vehicle tires with the features of claim 9.
- the object is achieved by a resin-free sealant for the temporary sealing of pneumatic vehicle tires, containing at least one rubber latex, at least one stabilizer and water.
- the resin-free sealant according to the invention has a significantly improved sealing performance. Ultimately, this leads to an improved functionality that the sealant according to the invention has compared to current sealants.
- the resin-free sealant according to the invention shows further advantageous performance characteristics with regard to pumpability and aerosol efficiency.
- the resin-free sealant can be manufactured at low cost.
- weight data relate to the total amount of sealant or to the total amount of agent for the temporary sealing of pneumatic vehicle tires.
- the rubber latex comprises or consists of NR latex.
- the rubber latex can be a natural rubber latex (NR) from Hevea brasiliensis or latex from the guayule bush (Parlhenium argentatum), it being possible for the natural rubber latex to be used in deprotonated form.
- NR natural rubber latex
- the Latex is synthetically produced and used. The use of different latices in blends as well as a mixture of NR and synthetic latex is also conceivable for this.
- the sealant has a latex content in the range from 27 to 46% by weight, preferably in the range from 36 to 45% by weight.
- a major advantage of such a sealant with this latex content is that the pumpability and aerosol efficiency is significantly improved, so that the sealant is more effective.
- the sealant comprises at least one antifreeze, preferably at least two antifreezes, wherein in particular at least one antifreeze has at least one glycol selected from the group consisting of ethanediol and propanediol.
- the antifreeze has a low freezing point, which is usually below -10°C. In combination with water, the freezing point is even lower and can reach -55 °C with the right mixture.
- the sealant with a low freezing point can be used in colder regions without the pumpability and flow properties being significantly impaired.
- the first antifreeze particularly preferably contains 1,2-ethanediol and the second antifreeze contains 1,2-propanediol. Both antifreezes are miscible with water and reduce the freezing point.
- a further advantage is that the sealant with such an antifreeze is more environmentally friendly.
- the total proportion of antifreeze is preferably in the range from 27 to 40% by weight, in particular the proportion of the first antifreeze in the range from 20 to 25% by weight and the proportion of the second antifreeze in the range from 7 up to 15% by weight.
- this total proportion of antifreeze is optimal for lowering the freezing point of the entire sealant, so that it can also be used at lower temperatures with optimal pumpability and flow properties and improved sealing properties.
- the at least one stabilizer is a surfactant, with the total proportion of the surfactant preferably being in the range from 0.25 to 5% by weight. The at least one surfactant advantageously stabilizes at least the latex and in particular an antifreeze, as a result of which the resin-free sealant is stabilized overall.
- the sealant particularly preferably contains two surfactants, the total proportion of the first and second surfactants being in the range from 0.5 to 2% by weight.
- the two surfactants can interact with each other and with other components, so that the conveying properties and the sealing properties are improved.
- the at least one surfactant also preferably has one or more sulfonates, in particular anionic mono- or disulfonates and/or at least one alkyl ether sulfate, such as sodium alkylphenol polyethylene glycol ether sulfate, and at least one steric surfactant.
- these are good foaming agents, as a result of which sealing in pneumatic vehicle tires is significantly improved.
- Steric surfactants have a good viscosity and foam-regulating effect on the sealant.
- the resin-free sealant includes other additives.
- anti-aging agents or preservatives can be added to the resin-free sealant to ensure that the sealant is ready for use during storage.
- the sealant can contain dispersants and/or emulsifiers and/or pH regulators. A major advantage is that the resin-free sealant shows a significantly better sealing performance.
- the sealant contains 1 to 2% by weight of at least one aging inhibitor, in particular dispersions of sterically and alkylated (poly)phenols and/or alkylated diphenylamines.
- the sealant can thus be made to last longer.
- the resin-free sealant includes fillers that contribute to sealing, particularly larger holes. Examples are fibrous materials, in particular natural and synthetic fibers, phyllosilicates, silicic acid, talc, chalk, soot, rubber powder and the like.
- the resin-free sealant has a viscosity at 25° C. of 3 to 23 mPa*s, in particular 6 to 16 mPa*s (dynamic viscosity on the rheometer, 0.5° cone, 16000 rpm) . This significantly improves the flow properties of the sealant.
- the water content of the resin-free sealant is in the range from 15 to 30% by weight, in particular in the range from 20 to 25% by weight.
- a latex which is an aqueous dispersion (emulsion) of up to 85% by weight, preferably up to 70% by weight.
- the proportion of solids in the dispersion, based on the total weight is up to 85% by weight, preferably up to 70% by weight.
- the proportion of solids in the dispersion, based on the total weight can be in the range from 85 to 70% by weight, in particular in the range from 80 to 75% by weight.
- the resin-free sealant having such a water content and/or solid content is significantly more efficient in terms of sealing properties without using a resin.
- the object of the present invention is achieved by a sealant container having a resin-free sealant as described, the sealant container having an opening through which the resin-free sealant can be conveyed into a vehicle tire.
- the sealant container according to the invention is easy to use because the resin-free sealant can easily flow out of the sealant container. It is conceivable that the user can manually squeeze or squeeze the container to promote the sealant in the vehicle tire. For this purpose, the container must be connected to the vehicle tire valve via a hose, for example. Alternatively, such a container can be connected to a breakdown kit via a hose. A squeezing out of the resin-free Sealant in a breakdown kit is also conceivable, the breakdown kit being designed to generate compressed air with the help of a compressor, which promotes the resin-free sealant in the vehicle tires.
- the sealant container can be connected to a breakdown assistance set.
- the sealant container has a connection that can be connected to a breakdown assistance set, for example, by means of a plug-in or rotary mechanism.
- a sealant container can be connected to a roadside assistance set, which considerably simplifies operation for the user. It has also been found that the sealant container comprising a resin-free sealant leads to significantly improved sealing performance.
- the object of the present invention is achieved by a method for temporarily sealing a pneumatic vehicle tire using at least one resin-free sealant.
- a method for temporarily sealing a pneumatic vehicle tire using at least one resin-free sealant makes it easier for the user to seal a pneumatic vehicle tire since the sealing performance of the non-resin sealant has been greatly improved.
- the sealant is sprayed in through a valve of the pneumatic vehicle tire.
- the breakdown kit includes a compressor that generates compressed air.
- the generated compressed air transports the sealant through a hose into the vehicle tire.
- the invention relates to the use of a resin-free sealant as described in a breakdown assistance set for a pneumatic vehicle tire.
- Table 1 shows that the example according to the invention shows a significantly better sealing performance. For the user, this results in improved functionality of the sealant compared to sealants with a resin.
- Substances used a) 60% by weight solids, LATZ natural latex, e.g. Weber & Schaer b) Rosin ester, 50% by weight solids, Tacolyn, Eastman Chemical Company c) Aromatically modified terpene resin, Nanolet TO, Yasuhara chemical Co. Ltd d) anionic disulfonate, 51% by weight active solids e) sodium trialkylphenol polyethylene glycol ether sulfate, 25% by weight active solids f) resin/latex ratio in terms of latex and resin solids content Table 1 :
- the sealing performance is determined by filling the sealant into a defective pneumatic vehicle tire and simulating a first driving cycle for 10 minutes.
- the tightness of the vehicle tire is then checked with a leak detection spray, with the condition being classified as tight and the condition as leaky.
- a leak detection spray At an exemplary count of 4/10, 10 pneumatic vehicle tires were tested, 4 of which were leaking and 6 were leaking after the 10 minutes.
- a second driving cycle is carried out for 10 minutes, after which the tightness is checked again.
- the pumpability is determined by checking the system performance as follows in a test setup consisting of wheel, car valve and compressor sealant system:
- the wheel is filled with sealant and air using the compressor until a target filling pressure of 220 kPa has been reached. During this process, the prevailing pressure in the compressor and in the wheel are measured simultaneously. When the target inflation pressure of 220 kPa is reached, the inflation process is stopped and the time it took to reach this 220 kPa is noted. The shorter the time required, the more stable the sealant mixture is with regard to drying out and shear-induced coagulation. A short system runtime is most advantageous for the end customer.
- a wheel consisting of tire and rim, is penetrated at a defined point in the tread of a tire by a nail with a diameter of 6 mm. This creates a hole which, if the tire is filled with air, can be characterized by the loss of pressure per unit of time. Specifically, the pressure drop of 250 kPa that occurs after one minute is measured. The greater the pressure drop, the larger the hole in the tire.
- the pressure drop of 250 kPa is determined exactly twice within one minute; once before the sealant was transferred into the wheel with the help of the compressor; a second time after the sealant has been transferred into the wheel with the help of the compressor.
- a sealant-air mixture (aerosol) forms in the wheel, which is transported through the hole in the tread of the tire due to the overpressure in the tire.
- This mixture has the ability to coagulate when sheared. For these reasons (overpressure, ability to coagulate) the hole is significantly reduced by the sealant, which correlates with a smaller pressure drop of 250 kPa over a period of one minute.
- Resin-free sealant for the temporary sealing of pneumatic vehicle tires, characterized in that the sealant contains at least one rubber latex, at least one stabilizer and water.
- Resin-free sealant according to claim 1 characterized in that the rubber latex comprises NR latex or consists of NR latex.
- Resin-free sealant according to claim 1 or 2 characterized in that the sealant has a latex content in the range from 27 to 46% by weight, preferably in the range from 36 to 45% by weight.
- Resin-free sealant according to one of the preceding claims, characterized in that the sealant comprises at least one antifreeze, preferably at least two antifreezes, wherein in particular at least one antifreeze has at least one glycol selected from the group consisting of ethanediol and propanediol.
- Resin-free sealant according to claim 4 characterized in that the total proportion of antifreeze is in the range from 27 to 40% by weight, in particular the proportion of the first antifreeze in the range from 20 to 25% by weight and the proportion of the second antifreeze is in the range of 7 to 15% by weight.
- Resin-free sealant according to one of the preceding claims, characterized in that the at least one stabilizer is a surfactant, the total proportion of the surfactant preferably being in the range from 0.25 to 5% by weight.
- Resin-free sealant according to one of the preceding claims characterized in that the water content is in the range from 15 to 30% by weight, in particular in the range from 20 to 25% by weight.
- Sealant container having a resin-free sealant according to one of the preceding claims characterized in that the sealant container has an opening through which the resin-free sealant can be conveyed into a vehicle tire.
- Sealant container according to Claim 8 characterized in that the sealant container can be connected to a breakdown kit.
- Method according to claim 10 characterized in that the sealant is sprayed through a valve of the vehicle tire.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Material Composition (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102021212408.9A DE102021212408A1 (de) | 2021-11-04 | 2021-11-04 | Harzfreies Dichtmittel zum provisorischen Abdichten von Fahrzeugluftreifen, Dichtmittebehälter umfassend ein solches, Verfahren zum provisorischen Abdichten eines Fahrzeugluftreifens sowie die Verwendung |
| PCT/DE2022/200240 WO2023078516A1 (de) | 2021-11-04 | 2022-10-20 | Harzfreies dichtmittel zum provisorischen abdichten von fahrzeugluftreifen, dichtmittelbehälter umfassend ein solches, verfahren zum provisorischen abdichten eines fahrzeugluftreifens sowie die verwendung |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4426547A1 true EP4426547A1 (de) | 2024-09-11 |
Family
ID=84245695
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22800079.0A Pending EP4426547A1 (de) | 2021-11-04 | 2022-10-20 | Harzfreies dichtmittel zum provisorischen abdichten von fahrzeugluftreifen, dichtmittelbehälter umfassend ein solches, verfahren zum provisorischen abdichten eines fahrzeugluftreifens sowie die verwendung |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20250033303A1 (de) |
| EP (1) | EP4426547A1 (de) |
| JP (2) | JP2024535548A (de) |
| CN (1) | CN118201766A (de) |
| DE (1) | DE102021212408A1 (de) |
| WO (1) | WO2023078516A1 (de) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4927801A (de) * | 1972-07-10 | 1974-03-12 | ||
| DE102014224491A1 (de) | 2014-12-01 | 2016-06-02 | Continental Reifen Deutschland Gmbh | Mittel zum provisorischen Abdichten von aufblasbaren oder aufpumpbaren Gegenständen und Verfahren zum provisorischen Abdichten von aufblasbaren oder aufpumpbaren Gegenständen |
| AU2015413531B2 (en) * | 2015-10-27 | 2020-11-05 | Top Alliance Technology Ltd. | Sealant for tire repairing |
| WO2018008722A1 (ja) * | 2016-07-08 | 2018-01-11 | 株式会社ブリヂストン | パンクシーリング剤 |
| DE112018002061B4 (de) * | 2017-04-18 | 2023-02-02 | The Yokohama Rubber Co., Ltd. | Dichtmittel für Reifenlöcher |
| EP3524415B1 (de) * | 2018-02-07 | 2020-06-10 | Sumitomo Rubber Industries, Ltd. | Durchstichabdichtungsmittel und durchstichreparatursystem |
| EP3613570B1 (de) * | 2018-08-22 | 2022-12-21 | Sumitomo Rubber Industries, Ltd. | Durchstichabdichtungsmittel und durchstichreparatursystem |
| US11472986B2 (en) * | 2018-08-22 | 2022-10-18 | Sumitomo Rubber Industries, Ltd. | Puncture sealing agent and puncture repair system |
-
2021
- 2021-11-04 DE DE102021212408.9A patent/DE102021212408A1/de active Pending
-
2022
- 2022-10-20 EP EP22800079.0A patent/EP4426547A1/de active Pending
- 2022-10-20 CN CN202280073351.8A patent/CN118201766A/zh active Pending
- 2022-10-20 JP JP2024521185A patent/JP2024535548A/ja active Pending
- 2022-10-20 US US18/707,397 patent/US20250033303A1/en active Pending
- 2022-10-20 WO PCT/DE2022/200240 patent/WO2023078516A1/de not_active Ceased
-
2025
- 2025-08-04 JP JP2025129845A patent/JP2025163167A/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| CN118201766A (zh) | 2024-06-14 |
| JP2024535548A (ja) | 2024-09-30 |
| DE102021212408A1 (de) | 2023-05-04 |
| WO2023078516A1 (de) | 2023-05-11 |
| JP2025163167A (ja) | 2025-10-28 |
| US20250033303A1 (en) | 2025-01-30 |
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