JP6750308B2 - Puncture sealant - Google Patents
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- JP6750308B2 JP6750308B2 JP2016106498A JP2016106498A JP6750308B2 JP 6750308 B2 JP6750308 B2 JP 6750308B2 JP 2016106498 A JP2016106498 A JP 2016106498A JP 2016106498 A JP2016106498 A JP 2016106498A JP 6750308 B2 JP6750308 B2 JP 6750308B2
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- 239000000565 sealant Substances 0.000 title claims description 7
- 238000007789 sealing Methods 0.000 claims description 59
- 239000003795 chemical substances by application Substances 0.000 claims description 40
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 claims description 15
- 229910052740 iodine Inorganic materials 0.000 claims description 15
- 239000011630 iodine Substances 0.000 claims description 15
- 229920006173 natural rubber latex Polymers 0.000 claims description 15
- DNIAPMSPPWPWGF-VKHMYHEASA-N (+)-propylene glycol Chemical compound C[C@H](O)CO DNIAPMSPPWPWGF-VKHMYHEASA-N 0.000 claims description 6
- YPFDHNVEDLHUCE-UHFFFAOYSA-N 1,3-propanediol Substances OCCCO YPFDHNVEDLHUCE-UHFFFAOYSA-N 0.000 claims description 6
- 229920000166 polytrimethylene carbonate Polymers 0.000 claims description 6
- 239000003921 oil Substances 0.000 description 20
- 235000019198 oils Nutrition 0.000 description 20
- 239000003925 fat Substances 0.000 description 18
- 235000019197 fats Nutrition 0.000 description 18
- 238000002347 injection Methods 0.000 description 12
- 239000007924 injection Substances 0.000 description 12
- 238000013329 compounding Methods 0.000 description 9
- 229920005989 resin Polymers 0.000 description 8
- 239000011347 resin Substances 0.000 description 8
- 239000007787 solid Substances 0.000 description 7
- 229920001971 elastomer Polymers 0.000 description 6
- 239000005060 rubber Substances 0.000 description 6
- 238000002156 mixing Methods 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- 239000013065 commercial product Substances 0.000 description 4
- 239000000314 lubricant Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 125000004432 carbon atom Chemical group C* 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229920000126 latex Polymers 0.000 description 3
- 150000004670 unsaturated fatty acids Chemical class 0.000 description 3
- 235000021122 unsaturated fatty acids Nutrition 0.000 description 3
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 239000012736 aqueous medium Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 235000005687 corn oil Nutrition 0.000 description 2
- 239000002285 corn oil Substances 0.000 description 2
- 235000014113 dietary fatty acids Nutrition 0.000 description 2
- POULHZVOKOAJMA-UHFFFAOYSA-N dodecanoic acid Chemical compound CCCCCCCCCCCC(O)=O POULHZVOKOAJMA-UHFFFAOYSA-N 0.000 description 2
- 239000003995 emulsifying agent Substances 0.000 description 2
- 239000000839 emulsion Substances 0.000 description 2
- 229930195729 fatty acid Natural products 0.000 description 2
- 239000000194 fatty acid Substances 0.000 description 2
- 150000004665 fatty acids Chemical class 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- IPCSVZSSVZVIGE-UHFFFAOYSA-N hexadecanoic acid Chemical compound CCCCCCCCCCCCCCCC(O)=O IPCSVZSSVZVIGE-UHFFFAOYSA-N 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 239000002736 nonionic surfactant Substances 0.000 description 2
- 102000004169 proteins and genes Human genes 0.000 description 2
- 108090000623 proteins and genes Proteins 0.000 description 2
- 150000004671 saturated fatty acids Chemical class 0.000 description 2
- 235000015112 vegetable and seed oil Nutrition 0.000 description 2
- GYSCBCSGKXNZRH-UHFFFAOYSA-N 1-benzothiophene-2-carboxamide Chemical compound C1=CC=C2SC(C(=O)N)=CC2=C1 GYSCBCSGKXNZRH-UHFFFAOYSA-N 0.000 description 1
- KGIGUEBEKRSTEW-UHFFFAOYSA-N 2-vinylpyridine Chemical compound C=CC1=CC=CC=N1 KGIGUEBEKRSTEW-UHFFFAOYSA-N 0.000 description 1
- OYHQOLUKZRVURQ-UHFFFAOYSA-N 9,12-Octadecadienoic Acid Chemical compound CCCCCC=CCC=CCCCCCCCC(O)=O OYHQOLUKZRVURQ-UHFFFAOYSA-N 0.000 description 1
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 1
- GHVNFZFCNZKVNT-UHFFFAOYSA-N Decanoic acid Natural products CCCCCCCCCC(O)=O GHVNFZFCNZKVNT-UHFFFAOYSA-N 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- TUNFSRHWOTWDNC-UHFFFAOYSA-N Myristic acid Natural products CCCCCCCCCCCCCC(O)=O TUNFSRHWOTWDNC-UHFFFAOYSA-N 0.000 description 1
- 229920000459 Nitrile rubber Polymers 0.000 description 1
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 235000019482 Palm oil Nutrition 0.000 description 1
- 235000021314 Palmitic acid Nutrition 0.000 description 1
- 102000035195 Peptidases Human genes 0.000 description 1
- 108091005804 Peptidases Proteins 0.000 description 1
- 235000004347 Perilla Nutrition 0.000 description 1
- 244000124853 Perilla frutescens Species 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 239000005062 Polybutadiene Substances 0.000 description 1
- 235000019484 Rapeseed oil Nutrition 0.000 description 1
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 235000019486 Sunflower oil Nutrition 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- OGBUMNBNEWYMNJ-UHFFFAOYSA-N batilol Chemical class CCCCCCCCCCCCCCCCCCOCC(O)CO OGBUMNBNEWYMNJ-UHFFFAOYSA-N 0.000 description 1
- 235000015278 beef Nutrition 0.000 description 1
- 229920005549 butyl rubber Polymers 0.000 description 1
- 239000004359 castor oil Substances 0.000 description 1
- 235000019438 castor oil Nutrition 0.000 description 1
- SECPZKHBENQXJG-UHFFFAOYSA-N cis-palmitoleic acid Natural products CCCCCCC=CCCCCCCCC(O)=O SECPZKHBENQXJG-UHFFFAOYSA-N 0.000 description 1
- 239000003240 coconut oil Substances 0.000 description 1
- 235000019864 coconut oil Nutrition 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- -1 diglycerides Chemical class 0.000 description 1
- ZQPPMHVWECSIRJ-MDZDMXLPSA-N elaidic acid Chemical compound CCCCCCCC\C=C\CCCCCCCC(O)=O ZQPPMHVWECSIRJ-MDZDMXLPSA-N 0.000 description 1
- 230000001804 emulsifying effect Effects 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 235000021323 fish oil Nutrition 0.000 description 1
- VZCCETWTMQHEPK-QNEBEIHSSA-N gamma-linolenic acid Chemical compound CCCCC\C=C/C\C=C/C\C=C/CCCCC(O)=O VZCCETWTMQHEPK-QNEBEIHSSA-N 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- ZEMPKEQAKRGZGQ-XOQCFJPHSA-N glycerol triricinoleate Natural products CCCCCC[C@@H](O)CC=CCCCCCCCC(=O)OC[C@@H](COC(=O)CCCCCCCC=CC[C@@H](O)CCCCCC)OC(=O)CCCCCCCC=CC[C@H](O)CCCCCC ZEMPKEQAKRGZGQ-XOQCFJPHSA-N 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- OYHQOLUKZRVURQ-IXWMQOLASA-N linoleic acid Natural products CCCCC\C=C/C\C=C\CCCCCCCC(O)=O OYHQOLUKZRVURQ-IXWMQOLASA-N 0.000 description 1
- 239000000944 linseed oil Substances 0.000 description 1
- 235000021388 linseed oil Nutrition 0.000 description 1
- 150000002632 lipids Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 150000004668 long chain fatty acids Chemical class 0.000 description 1
- 150000004667 medium chain fatty acids Chemical class 0.000 description 1
- 235000021243 milk fat Nutrition 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000007764 o/w emulsion Substances 0.000 description 1
- 235000014593 oils and fats Nutrition 0.000 description 1
- 239000004006 olive oil Substances 0.000 description 1
- 235000008390 olive oil Nutrition 0.000 description 1
- 239000003346 palm kernel oil Substances 0.000 description 1
- 235000019865 palm kernel oil Nutrition 0.000 description 1
- 239000002540 palm oil Substances 0.000 description 1
- SECPZKHBENQXJG-BQYQJAHWSA-N palmitelaidic acid Chemical compound CCCCCC\C=C\CCCCCCCC(O)=O SECPZKHBENQXJG-BQYQJAHWSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920001084 poly(chloroprene) Polymers 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 150000004666 short chain fatty acids Chemical class 0.000 description 1
- 239000003549 soybean oil Substances 0.000 description 1
- 235000012424 soybean oil Nutrition 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 239000002600 sunflower oil Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 229920006174 synthetic rubber latex Polymers 0.000 description 1
- 239000003760 tallow Substances 0.000 description 1
- 150000003505 terpenes Chemical class 0.000 description 1
- 235000007586 terpenes Nutrition 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 1
- 150000003626 triacylglycerols Chemical class 0.000 description 1
- 239000008158 vegetable oil Substances 0.000 description 1
- 239000003981 vehicle Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
- Tires In General (AREA)
- Sealing Material Composition (AREA)
Description
本発明は、タイヤパンク時に、タイヤホイールの空気バルブからパンクシーリング剤と高圧空気とを順次タイヤ内に注入する方式のパンク処置システムにおいて、シーリング剤の注入時に空気バルブで生じる詰まりを防止すると共に、初期シール性能にも優れたパンクシーリング剤に関する。 The present invention, at the time of tire puncture, in a puncture treatment system of a method of sequentially injecting a puncture sealing agent and high pressure air into the tire from an air valve of a tire wheel, while preventing clogging that occurs in the air valve at the time of injecting the sealing agent, The present invention relates to a puncture sealing agent having excellent initial sealing performance.
パンクしたタイヤを応急的に補修する処置システムとして、例えば、パンクシーリング剤を収容した耐圧容器とコンプレッサーなどの高圧空気源とを用い、空気バルブを経てタイヤ内にシーリング剤を注入した後、引き続いて連続的に高圧空気を注入し、走行可能な圧力までタイヤをポンプアップするもの（以下に一体型タイプという場合がある）が知られている（特開２００１−１９８９８６号公報の図１参照）。 As a treatment system for temporarily repairing a punctured tire, for example, using a pressure resistant container containing a puncture sealing agent and a high-pressure air source such as a compressor, after injecting the sealing agent into the tire through an air valve, subsequently. There is known one in which high-pressure air is continuously injected to pump up a tire to a pressure at which the vehicle can travel (hereinafter also referred to as an integral type) (see FIG. 1 of JP 2001-198986 A).
このようなパンクシーリング剤として、特許文献１、２には、低温での注入特性を改善したゴムラテックス、粘着付与剤及び１，３−プロパンジオールを含むパンクシーリング剤、更にノニオン性界面活性剤を添加して高温での注入特性も改善したパンクシーリング剤がそれぞれ開示されている。 As such a puncture sealing agent, Patent Documents 1 and 2 disclose a rubber latex having improved injection properties at low temperature, a puncture sealing agent containing a tackifier and 1,3-propanediol, and a nonionic surfactant. A puncture-sealant, which has been added to improve injection characteristics at high temperature, is disclosed.
しかしながら、ノニオン性界面活性剤を添加したパンクシーリング剤は、タイヤ内のパンク箇所に圧縮を受けた際、固まりにくく、修理完了までの時間が長くなるという問題がある。従って、良好な注入性を得つつ、初期シール性能（短時間でパンク修理が完了する性能）にも優れたパンクシーリング剤の提供が望まれている。 However, the puncture sealing agent added with a nonionic surfactant has a problem that it is hard to be solidified when a puncture point in a tire is compressed, and the time required for completion of repair is long. Therefore, it is desired to provide a puncture sealing agent which is excellent in initial sealing performance (performance in which puncture repair is completed in a short time) while obtaining good injection property.
本発明は、前記課題を解決し、注入性、初期シール性能に優れたタイヤのパンクシーリング剤を提供することを目的とする。 An object of the present invention is to solve the above-mentioned problems and to provide a puncture sealing agent for a tire, which is excellent in injection property and initial sealing performance.
本発明は、天然ゴムラテックスと、ヨウ素価９０〜１６５の油脂とを含むタイヤのパンクシーリング剤に関する。 The present invention relates to a puncture sealing agent for tires, which contains natural rubber latex and fats and oils having an iodine value of 90 to 165.
更に、１，３−プロパンジオールを含むことが好ましい。
前記油脂の含有量は、０．１〜２０質量％であることが好ましい。
Further, it is preferable to contain 1,3-propanediol.
The content of the oil or fat is preferably 0.1 to 20% by mass.
本発明によれば、天然ゴムラテックスと、ヨウ素価９０〜１６５の油脂とを含むタイヤのパンクシーリング剤であるので、優れた注入性、初期シール性能を得ることができる。従って、一体型タイプのパンク処置システムにおいて、バルブコアからパンクシーリング剤、エアーを注入する場合に、良好な注入性が得られると同時に、短時間でパンク修理を完了させることも可能となり、優れた初期シール性能も得ることができる。 According to the present invention, since it is a puncture sealing agent for tires containing natural rubber latex and fats and oils having an iodine value of 90 to 165, excellent injection properties and initial sealing performance can be obtained. Therefore, in the integrated type puncture treatment system, when injecting the puncture sealing agent and air from the valve core, good injectability can be obtained, and at the same time, the puncture repair can be completed in a short time. Sealing performance can also be obtained.
本発明のタイヤのパンクシーリング剤は、天然ゴムラテックスと、所定ヨウ素価の油脂とを含む。パンクシーリング剤をタイヤにバルブを通して注入する際、油脂が潤滑剤となり、バルブが詰まるのを防止できる。また、パンク穴に到達したシーリング剤はタイヤの回転により圧縮を受け、固まることで、比較的速く（効率的に）パンク穴を塞ぐことができる。従って、当該パンクシーリング剤により、両立が困難な注入性、初期シール性能について、同時に優れた性能を得ることが可能となる。 The puncture sealing agent for a tire of the present invention contains a natural rubber latex and an oil and fat having a predetermined iodine value. When injecting the puncture sealing agent into the tire through the valve, the oil and fat serve as a lubricant and can prevent the valve from being clogged. Further, the sealing agent that has reached the puncture hole is compressed and solidified by the rotation of the tire, so that the puncture hole can be closed relatively quickly (efficiently). Therefore, with the puncture sealing agent, it is possible to simultaneously obtain excellent performance in injection properties and initial sealing performance that are difficult to achieve at the same time.
本発明では、スムーズにシーリング剤をタイヤ内に注入できること、走行により速やかにパンク穴にシーリング剤が入り込み、タイヤの変形による機械的刺激を受けて固まってパンク穴を塞ぐこと（初期シール性能）、ある程度の走行距離までシール性が保持されること（シール保持性能）等の性能の観点から、天然ゴムラテックスを主成分とするシーリング剤が使用される。 In the present invention, the sealing agent can be smoothly injected into the tire, the sealing agent quickly enters the puncture hole by running, and the puncture hole is closed by being hardened by mechanical stimulation due to deformation of the tire (initial sealing performance), A sealing agent containing natural rubber latex as a main component is used from the viewpoint of performance such as maintaining the sealing property up to a certain running distance (seal retention performance).
特に、この天然ゴムラテックスから蛋白質を除去した所謂脱蛋白天然ゴムラテックスは、より少ないアンモニアで腐敗が抑えられるため、アンモニアに起因するスチールコードへの腐食損傷及び刺激臭の発生を防止するという観点からも、より好ましく使用できる。脱蛋白天然ゴムラテックスは、例えば、特開平１０−２１７３４４号公報に記載のように、天然ゴムラテックスに蛋白分解酵素を添加して、蛋白質を分解させた後、洗浄することによって調製できる。 In particular, the so-called deproteinized natural rubber latex obtained by removing proteins from this natural rubber latex can suppress spoilage with less ammonia, and therefore from the viewpoint of preventing corrosion damage to steel cord and irritating odor caused by ammonia. Can also be more preferably used. The deproteinized natural rubber latex can be prepared, for example, by adding a proteolytic enzyme to the natural rubber latex to decompose the protein and then washing, as described in JP-A-10-217344.
また、必要に応じて天然ゴムラテックスに、更にブタジエンゴム、スチレン−ブタジエンゴム、アクリロニトリル−ブタジエンゴム、エチレン−酢酸ビニルゴム、クロロプレンゴム、ビニルピリジンゴム、ブチルゴムなどの合成ゴムラテックス等をブレンドしてもよい。 If necessary, natural rubber latex may be further blended with butadiene rubber, styrene-butadiene rubber, acrylonitrile-butadiene rubber, ethylene-vinyl acetate rubber, chloroprene rubber, vinyl pyridine rubber, synthetic rubber latex such as butyl rubber. ..
なお、ゴムラテックスは、乳化剤である界面活性剤を少量含む水性媒体中に、ゴム固形分を微粒子状に乳化分散させたものであり、通常、ゴム固形分の占める割合を６０質量％程度としたゴムラテックスが使用される。 The rubber latex is obtained by emulsifying and dispersing the rubber solid content in the form of fine particles in an aqueous medium containing a small amount of a surfactant that is an emulsifier, and the proportion of the rubber solid content is usually about 60% by mass. Rubber latex is used.
初期シール性能、シール保持性能の点から、パンクシーリング剤の全質量１００質量％中、天然ゴムラテックス（ゴム固形分）の配合量Ａを１５〜４５質量％の範囲とすることが好ましい。配合量Ａの下限は２０質量％以上がより好ましく、上限は４０質量％以下がより好ましい。配合量Ａが１５質量％未満では、パンクシール性能及びシール保持性能が不十分となるおそれがある。逆に各配合量Ａが４５質量％を超えると、保管中にゴム粒子が凝集しやすくなるなど、保管性能を損ねるとともに、粘度が上昇しパンクシーリング剤の空気バルブからの注入を難しくさせるおそれがある。 From the viewpoint of initial sealing performance and seal retention performance, it is preferable that the compounding amount A of the natural rubber latex (rubber solid content) is in the range of 15 to 45 mass% in the total mass of 100 mass% of the puncture sealing agent. The lower limit of the compounding amount A is more preferably 20% by mass or more, and the upper limit is more preferably 40% by mass or less. If the blending amount A is less than 15% by mass, the puncture sealing performance and the seal holding performance may be insufficient. On the other hand, when the compounding amount A exceeds 45% by mass, the rubber particles are likely to aggregate during storage, which impairs the storage performance and increases the viscosity, which may make it difficult to inject the puncture sealing agent from the air valve. is there.
本発明では、所定ヨウ素価の油脂が使用される。当該油脂は、タイヤの注入時には潤滑剤として機能すると共に、タイヤの中では固まりやすくなる機能が発揮されるため、優れた注入性、初期シール性能を得ることが可能となる。 In the present invention, fats and oils having a predetermined iodine value are used. The oil/fat functions as a lubricant at the time of injecting the tire and exhibits a function of easily solidifying in the tire, so that it becomes possible to obtain excellent injectability and initial sealing performance.
油脂としては、脂肪酸とグリセリンとのエステルが挙げられ、具体的には、モノグリセリド、ジグリセリド、トリグリセリド等の中性脂質がある。油脂を構成する脂肪酸は、炭素数が２〜４の短鎖脂肪酸、炭素数が５〜１２の中鎖脂肪酸、炭素数が１２以上の長鎖脂肪酸のいずれでよく、飽和脂肪酸でも不飽和脂肪酸でもよい。飽和脂肪酸としては、デカン酸、ドデカン酸、テトラデカン酸、ヘキサデカン酸等；一価の不飽和脂肪酸としては、９−ヘキサデセン酸、９−オクタデセン酸等；多価の不飽和脂肪酸としては、９，１２−オクタデカジエン酸、６，９，１２−オクタデカトリエン酸等；が挙げられる。 Examples of fats and oils include esters of fatty acids and glycerin, and specific examples include neutral lipids such as monoglycerides, diglycerides, and triglycerides. The fatty acid constituting the fat may be any of a short-chain fatty acid having 2 to 4 carbon atoms, a medium-chain fatty acid having 5 to 12 carbon atoms, and a long-chain fatty acid having 12 or more carbon atoms, and may be a saturated fatty acid or an unsaturated fatty acid. Good. As the saturated fatty acid, decanoic acid, dodecanoic acid, tetradecanoic acid, hexadecanoic acid, etc.; as the monovalent unsaturated fatty acid, 9-hexadecenoic acid, 9-octadecenoic acid, etc.; as the polyvalent unsaturated fatty acid, 9,12 -Octadecadienoic acid, 6,9,12-octadecatrienoic acid and the like;
油脂のヨウ素価は、９０〜１６５である。９０未満であると、タイヤ内で圧縮を受けた際に、シーリング剤が固化しにくくなり、初期シール性能に劣る傾向がある。１６５を超えると、保管時にシーリング剤が固化しやすく、タイヤへの注入時に潤滑剤の役目を果たさずに、注入性に劣るおそれがある。下限は９２以上が好ましく、上限は１５５以下が好ましく、１５０以下がより好ましい。
なお、油脂のヨウ素価は、「基準油脂分析試験法（社団法人日本油化学会編）」の「２．３．４．１−１９９６ ヨウ素価（ウィイス−シクロヘキサン法）」に準じて測定できる。
The iodine value of fats and oils is 90 to 165. When it is less than 90, the sealing agent becomes hard to solidify when compressed in the tire, and the initial sealing performance tends to be poor. When it exceeds 165, the sealing agent is likely to be solidified during storage, the lubricant does not serve as a lubricant when injected into the tire, and the injection property may be poor. The lower limit is preferably 92 or more, the upper limit is preferably 155 or less, and more preferably 150 or less.
In addition, the iodine value of fats and oils can be measured according to "2.3.4.1-1996 iodine value (Wyeth-cyclohexane method)" of "Standard fat and oil analysis test method (edited by Japan Oil Chemists'Society)".
油脂の具体例としては、ナタネ油、大豆油、コーン油、ヤシ油、パーム油、パーム核油、ヒマワリ油、オリーブ油、米油、シソ油等の植物性油脂；牛脂、豚脂、乳脂、魚油などの動物性油脂；等が挙げられる。油脂は、単独で用いても、２種以上を併用してもよい。 Specific examples of oils and fats include vegetable oils such as rapeseed oil, soybean oil, corn oil, coconut oil, palm oil, palm kernel oil, sunflower oil, olive oil, rice oil and perilla oil; beef tallow, lard, milk fat, fish oil. Animal fats and oils such as; The fats and oils may be used alone or in combination of two or more.
初期シール性能、注入性の点から、パンクシーリング剤の全質量１００質量％中、前記所定ヨウ素価の油脂の配合量Ｂを０．１〜２０質量％の範囲とすることが好ましい。配合量Ｂの下限は０．５質量％以上がより好ましい。上限は１０質量％以下がより好ましく、７質量％以下が更に好ましい。 From the viewpoint of initial sealing performance and injectability, it is preferable that the blending amount B of the fat or oil having the predetermined iodine value is in the range of 0.1 to 20 mass% in the total mass of 100 mass% of the puncture sealing agent. The lower limit of the blending amount B is more preferably 0.5% by mass or more. The upper limit is more preferably 10% by mass or less, further preferably 7% by mass or less.
本発明では、凍結防止剤として、１，３−プロパンジオールを使用することが好ましい。これにより、低温でのシーリング剤の注入性を改善できる。このため、シーリング剤の使用温度範囲を低温側へ拡大でき、一体型タイプのパンク処置システムにおいて、低温でもバルブコアからシーリング剤、エアーを注入する場合に、バルブコアでの詰まりを防止できる。また、良好な凍結防止効果も得ることができる。更に、使用量も最小限に抑えられ、凍結防止剤によるパンクシール性能等の諸性能への悪影響も防止できる。 In the present invention, it is preferable to use 1,3-propanediol as the antifreezing agent. This can improve the injection property of the sealing agent at a low temperature. Therefore, the operating temperature range of the sealing agent can be expanded to the low temperature side, and when the sealing agent and the air are injected from the valve core even at a low temperature in the integrated type puncture treatment system, the clogging of the valve core can be prevented. Also, a good antifreezing effect can be obtained. Further, the amount used is also minimized, and it is possible to prevent adverse effects on various performances such as puncture sealing performance due to the antifreezing agent.
パンクシーリング剤の全質量１００質量％中、１，３−プロパンジオールの配合量Ｃは、１５〜６０質量％が好ましい。配合量Ｃが１５質量％未満では、低温での粘度上昇が大きくなり、逆に６０質量％を超えると、シーリング剤中の固形分が少なくなり、パンクシーリング性が低下するおそれがある。配合量Ｃの下限は２０質量％以上がより好ましく、上限は４０質量％以下がより好ましい。 The compounding amount C of 1,3-propanediol is preferably 15 to 60% by mass based on 100% by mass of the total amount of the puncture-sealant. When the compounding amount C is less than 15% by mass, the viscosity increase at low temperature becomes large, while when it exceeds 60% by mass, the solid content in the sealing agent becomes small and the puncture sealing property may be deteriorated. The lower limit of the blending amount C is more preferably 20% by mass or more, and the upper limit is more preferably 40% by mass or less.
１，３−プロパンジオールの配合量Ｃ′は、パンクシーリング剤の液体成分１００質量％中、５０〜８０質量％が好ましい。配合量Ｃ′が５０質量％未満では、低温での粘度上昇が大きくなるおそれがある。逆に８０質量％を超えると、注入性が悪化する。配合量Ｃ′の下限は５５質量％以上がより好ましく、上限は７０質量％以下がより好ましい。 The compounding amount C'of 1,3-propanediol is preferably 50 to 80 mass% in 100 mass% of the liquid component of the puncture-sealant. When the compounding amount C'is less than 50% by mass, there is a possibility that the viscosity increase at a low temperature becomes large. On the other hand, when it exceeds 80% by mass, the injection property deteriorates. The lower limit of the compounding amount C′ is more preferably 55% by mass or more, and the upper limit is more preferably 70% by mass or less.
前記パンクシーリング剤は、特段、粘着付与剤を添加しなくても良好な性能を得ることができる。粘着付与剤は、天然ゴムラテックスとタイヤとの接着性を高め、パンクシール性能を向上させるために用いられるものであり、例えば、乳化剤を少量含む水性媒体中に、粘着付与樹脂を微粒子状に乳化分散させた粘着付与樹脂エマルジョン（水中油滴型エマルジョン）が挙げられる。粘着付与樹脂エマルジョン（粘着付与剤）の固形分である粘着付与樹脂としては、テルペン系樹脂、フェノール系樹脂、ロジン系樹脂等が挙げられる。 The puncture-sealant can obtain good performance without adding a tackifier. The tackifier is used to increase the adhesion between the natural rubber latex and the tire and improve the puncture sealing performance.For example, in an aqueous medium containing a small amount of an emulsifier, the tackifier resin is emulsified into fine particles. An example is a dispersed tackifying resin emulsion (oil-in-water emulsion). Examples of the tackifying resin that is the solid content of the tackifying resin emulsion (tackifier) include terpene-based resins, phenol-based resins, and rosin-based resins.
粘着付与樹脂（粘着付与剤の固形分）の配合量Ｄは、パンクシーリング剤の全質量１００質量％中、１０質量％以下が好ましく、０質量％でもよい。 The compounding amount D of the tackifier resin (solid content of the tackifier) is preferably 10% by mass or less and may be 0% by mass in 100% by mass of the total amount of the puncture sealing agent.
本発明のパンクシーリング剤は、本発明の効果を阻害しない範囲で、他の成分を更に配合してもよい。
本発明のパンクシーリング剤は、一般的な方法で製造される。すなわち、前記各成分等を公知の方法により混合すること等により製造できる。
The puncture-sealant of the present invention may further contain other components as long as the effects of the present invention are not impaired.
The puncture sealing agent of the present invention is manufactured by a general method. That is, it can be produced by mixing the above components and the like by a known method.
実施例に基づいて、本発明を具体的に説明するが、本発明はこれらのみに限定されるものではない。 The present invention will be specifically described based on Examples, but the present invention is not limited thereto.
〔実施例及び比較例〕
市販の天然ゴムラテックス（マレーシア産のＨＡ型天然ゴムラテックス：ゴム固形分６０質量％）を用い、表１の仕様に基づいて、パンクシーリング剤を作製した。
[Examples and Comparative Examples]
Using a commercially available natural rubber latex (HA natural rubber latex produced in Malaysia: rubber solid content 60% by mass), a puncture sealing agent was prepared based on the specifications shown in Table 1.
なお、油脂は、以下のものを使用した。
コーン油：市販品（ヨウ素価：１４７）
なたね油：市販品（ヨウ素価：９４）
ひまし油：市販品（ヨウ素価：８９）
あまに油：市販品（ヨウ素価：１６８）
The following fats and oils were used.
Corn oil: Commercial product (iodine value: 147)
Seed oil: Commercial product (iodine value: 94)
Castor oil: Commercial product (iodine value: 89)
Flaxseed oil: Commercial product (iodine value: 168)
得られた各パンクシーリング剤について、注入性、パンクシール性能（初期シール性能）を下記方法にて評価し、結果を表１に示した。 With respect to each of the obtained puncture sealing agents, injectability and puncture sealing performance (initial sealing performance) were evaluated by the following methods, and the results are shown in Table 1.
（１）注入性
７０℃の雰囲気下で２ヶ月間静置した後、一体型タイプのパンク処置システムを用いて、パンクシーリング剤をタイヤに注入し、バルブが詰まることなく注入できたか否かを以下の２段階で評価した。
○：バルブに詰まることなく、注入できた。
×：バルブに詰まり、注入できなかった。
(1) Injectability After standing in an atmosphere of 70°C for 2 months, a puncture sealing system was used to inject a puncture sealing agent into a tire to check whether or not injection was possible without clogging the valve. The following two grades were evaluated.
◯: Injection was possible without clogging the valve.
X: The valve was clogged and injection could not be performed.
（２）パンクシール性能
タイヤサイズ１９５／６５Ｒ１５のタイヤに、直径４．０ｍｍの釘で穴を開け、釘を抜いた後、４００ｍｌのパンクシーリング剤を注入し、かつエアーを２５０ｋｐａまで昇圧した。その後、ドラム上で荷重（３．５ｋＮ）にて４０ｋｍ／ｈで１０分間走行させた後、パンク穴が塞がったか否かを以下の２段階で評価した。
○：パンク穴が塞がった。
×：パンク穴が塞がらなかった。
(2) Puncture sealing performance A tire having a tire size of 195/65R15 was punched with a nail having a diameter of 4.0 mm, the nail was removed, 400 ml of a puncture sealing agent was injected, and the air pressure was increased to 250 kpa. Then, after running on a drum at a load (3.5 kN) at 40 km/h for 10 minutes, whether or not the puncture hole was blocked was evaluated in the following two stages.
○: The puncture hole was closed.
X: The puncture hole was not blocked.
表１のとおり、天然ゴムラテックスにヨウ素価８９、１６８の油脂を添加した比較例では、注入性、初期シール性能のいずれかに劣っているのに対し、ヨウ素価９０〜１６５の油脂を添加した実施例では、両性能とも優れた性能が得られることが明らかとなった。 As shown in Table 1, in Comparative Examples in which fats and oils having iodine values of 89 and 168 were added to natural rubber latex, inferior injectability and initial sealing performance, fats and oils having iodine values of 90 to 165 were added. In the example, it has been clarified that both performances are excellent.
Claims (3)
前記タイヤのパンクシーリング剤は、天然ゴムラテックスと、ヨウ素価９０〜１６５の油脂とを含むパンク処置システム。 A puncture treatment system for injecting a tire puncture sealing agent and high-pressure air into a tire from an air valve,
The puncture sealing agent for a tire is a puncture treatment system containing natural rubber latex and an oil or fat having an iodine value of 90 to 165.
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