Tire puncture sealant
a technology of puncture sealant and tire, which is applied in the field of tire puncture sealant, can solve the problems of inability to inject sealant into punctured tires, poor storage stability, and inability to rust and corrode steel cords in tires, and achieve excellent storage stability, low viscosity, and less pungent odor.
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[0359]Hereinafter, the present invention will be specifically described by way of examples. However, the present invention is not limited to these examples.
1. Examples of the Tire Puncture Sealant in the First Aspect of the Present Invention
Preparation of Urethane Emulsion
Synthetic Examples 1-1 to 1-5
[0360]The respective components of (A) listed in Table 1 below were mixed in amounts (g) shown in Table 1, to thereby synthesize each of carboxy group-containing urethane prepolymers.
[0361]Next, the respective components of (B) listed in Table 1 below were added to each of the carboxy group-containing urethane prepolymers in amounts (g) shown in Table 1. The mixture was emulsified with sufficient stirring to prepare each of urethane emulsions in Synthetic Examples 1-1 to 1-5.
[0362]The hydrogen ion exponent of each of the resulting urethane emulsions was measured with a pH meter (manufactured by Hitachi High-Technologies Corporation, hereinafter same as this). The results are shown in Ta...
examples 1-1 to 1-26
and Comparative Examples 1-1 and 1-2
[0381]The respective components listed in Table 2 below were mixed in compositions (parts by weight) shown in Table 2 with a stirring device, thereby preparing the respective tire puncture sealants shown in Table 2.
[0382]The hydrogen ion exponent of each of the tire puncture sealants thus obtained was measured with a pH meter. Each tire puncture sealant was evaluated for the rustproof properties, odor, freezing point, sealing properties, thermal shock cycle stability, shaking test, storage stability, liquid supply properties, and air supply properties.
[0383]The results are shown in Table 2.
(Rustproof Properties)
[0384]Each tire puncture sealant was applied onto the surface of a steel plate having been degreased with methyl ethyl ketone, and then left standing for 24 hours at 20° C. to be dried. Subsequently, the steel plate was immersed in hot water at 50° C. and left standing for 7 days. After that, the sealant was peeled off of the steel plate an...
synthetic example 2-1
[0408]Monomers, a surfactant (polyoxyethylene lauryl ether), and a polymerization initiator (t-butylhydroxy peroxide) listed in Table 3 below were mixed together in amounts (parts by weight) shown in Table 3. The mixture was added to 60 parts by weight of ion-exchange water and stirred at room temperature for about 10 minutes to obtain a milky monomer emulsified liquid.
[0409]Previously, 10 parts by weight of ion-exchange water was fed to a reaction vessel and heated to 70° C. Then, the resulting monomer emulsified liquid was added dropwise over 1 hour to the reaction vessel. Thereafter, the reaction was allowed to proceed at 70° C. for 4 hours to obtain an acrylic emulsion.
TABLE 3Synthetic Example 2-12-ethylhexyl methacrylate20Methacrylic acid10Butyl methacrylate40Polyoxyethylene lauryl ether0.5t-butylhydroxy peroxide1Ion-exchange water70
[0410]The respective components listed in Table 3 are as follows:
[0411]2-ethylhexyl methacrylate: LIGHT-ESTER EH, manufactured by Kyoeisha Chemical...
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Abstract
Description
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Application Information
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