JP2023505660A - タイヤコード用接着組成物、タイヤコードおよびタイヤ - Google Patents
タイヤコード用接着組成物、タイヤコードおよびタイヤ Download PDFInfo
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- JP2023505660A JP2023505660A JP2022533627A JP2022533627A JP2023505660A JP 2023505660 A JP2023505660 A JP 2023505660A JP 2022533627 A JP2022533627 A JP 2022533627A JP 2022533627 A JP2022533627 A JP 2022533627A JP 2023505660 A JP2023505660 A JP 2023505660A
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- tire
- adhesive composition
- weight
- polyurethane resin
- tire cord
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Images
Classifications
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- C—CHEMISTRY; METALLURGY
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- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
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- B60C9/0042—Reinforcements made of synthetic materials
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- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
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Abstract
Description
実施例1
(1)水分散ポリウレタン樹脂の合成
下記表1に記載されたモル比でもって、ポリエステルポリオール(重量平均分子量:2000)、ジオール(1,6-ヘキサンジオール)、ジメチロールブタン酸(Dimethylol butanoic acid;DMBA)を投入して常圧にて、75±5℃で4時間の間混合した。
下記表4のような含有量(重量%)の割合でもって各成分を混合し、約20℃の温度にて24時間の間、同一条件で攪拌して、実施例および比較例の各組成物を製造した。
ポリエステル原糸を用いて360TPM(T/m)の撚り数を有する下撚糸(Z-方向)2本(111,112)を準備した後、2本の下撚糸(111,112)を360TPMの撚り数で共に上撚り(S-方向)して、合撚糸(1650dtex/2合計)を製造した。このように製造された合撚糸をローコード(110)として使用した。
(1)水分散ポリウレタン樹脂の合成
下記表1または表2のように使用した成分のモル比を異にしたことを除いては、実施例1と同一の方法で、水分散脂環族ポリウレタンを製造した。
下記表4または表5のような含有量(重量%)の割合で各成分を混合し、約20℃の温度にて24時間の間、同一条件で攪拌して、各組成物を製造した。
前記タイヤコード用接着組成物を異にしたことを除いては、実施例1と同一の方法でタイヤコードを製造した。
(1)水分散ポリウレタン樹脂の合成
下記表3のように使用した成分のモル比を異にしたことを除いては、実施例1と同一の方法で、水分散脂環族ポリウレタンを製造した。
下記表6のような含有量(重量%)割合で各成分を混合して、約20℃の温度にて24時間の間、同一の条件で攪拌して、各組成物を製造した。
前記タイヤコード用接着組成物を異にしたことを除いては、実施例1と同一の方法でタイヤコードを製造した。
(A)ラテックス:Closlen社の0653のVPラテックス
(C)アミン化合物:Lonza社のAcrawaxTM C Dispersion
(D)鎖延長剤:ピペラジン(Piperazine)
(E)エポキシ化合物:NAGASE社のEX614B(ソルビトール・ポリグリシジルエーテル(Sorbitol Polyglycidyl Ether)、エポキシ含有量(Epoxy content):167g/eq,粘度(Viscosity(mPa・s):21,200)
(F)イソシアネート:EMS社のIL-6
(G)溶媒:脱塩水(Demineralized water)
TSC:総固形分(Total Solid Contents)
実験例1:実施例および比較例組成物の粘度測定
ウベローデ粘度計(Ubbelohde viscometer)を用いて常温(約25℃)で、上記のように製造された実施例および比較例の各組成物の粘度を測定した。
T1/T0
T1:組成物がBの上目盛を通過してBの下目盛を通過するまでかかった時間
T0:脱塩水(Demineralized water)がBの上目盛を通過してBの下目盛を通過するまでかかった時間
実施例および比較例それぞれで製造されたタイヤコードに対して、単位面積当たりの接着力評価をするために、ASTM D4393のタイヤコードの接着剥離強度を測定した。具体的には、0.6mm厚さのゴムシート、コードファブリック(コード地)、0.6mm厚さのゴムシート、コードファブリック(コード地)、0.6mm厚さのゴムシートを順に積層して試料を製造した後、60kg/cm2の圧力でもって170℃にて15分間加硫して試料(Sample)を製作した。
実施例および比較例のそれぞれで製造されたタイヤコードに対して、実施例および比較例の各組成物の耐疲労度を測定した。
疲労度(%)=(flexed部位の接着力測定結果)*100/(unflexed部位の接着力測定結果)
Claims (16)
- エポキシ化合物;ラテックス;250,000~350,000の重量平均分子量(Mw)を有する脂環族ポリウレタン樹脂;アミン化合物;および水;を含む、タイヤコード用接着組成物。
- 前記250,000~350,000の重量平均分子量(Mw)を有する脂環族ポリウレタン樹脂は、炭素数4~30の脂環族グループを1つ以上含むポリイソシアネートと、ポリオールとの間の反応物を含む、請求項1に記載のタイヤコード用接着組成物。
- 前記脂環族ポリウレタン樹脂は、脂環族ポリウレタンイオノマーから形成された水分散脂環族ポリウレタン樹脂である、請求項1に記載のタイヤコード用接着組成物。
- 前記脂環族ポリウレタン樹脂は、ジメチロールブタン酸(Dimethylol butanoic acid)およびジメチロールプロピオン酸(Dimethylol propionic acid)からなる群より選ばれた1種以上の化合物から由来した部分を1~20モル%含む、請求項1に記載のタイヤコード用接着組成物。
- ウベローデ粘度計を用いて常温で測定された粘度が2.50~2.85の範囲を満たす、請求項1に記載のタイヤコード用接着組成物。
- 前記250,000~350,000の重量平均分子量(Mw)を有する脂環族ポリウレタン樹脂0.5~10重量%を含む、請求項1に記載のタイヤコード用接着組成物。
- エポキシ化合物0.1~10重量%;
ラテックス1~30重量%;
250,000~350,000の重量平均分子量(Mw)を有する脂環族ポリウレタン樹脂0.5~10重量%;
アミン化合物0.1~10重量%;および
水50~95重量%;を含む、請求項6に記載のタイヤコード用接着組成物。 - 前記アミン化合物は、鎖構造を有するアミン化合物を含む、請求項1に記載のタイヤコード用接着組成物。
- 前記タイヤコード用接着組成物は、イソシアネート系化合物、アジリジン系化合物および金属キレート系化合物からなる群より選ばれた1種以上の架橋剤をさらに含む、請求項1に記載のタイヤコード用接着組成物。
- 前記タイヤコード用接着組成物は50重量%以上の水を含む、請求項1に記載のタイヤコード用接着組成物。
- 繊維基材;および
前記繊維基材上に形成され、請求項1に記載の接着組成物から形成された接着層;を含む、タイヤコード。 - 繊維基材;および
前記繊維基材上に形成され、エポキシ化合物;ラテックス;250,000~350,000の重量平均分子量(Mw)を有する脂環族ポリウレタン樹脂;およびアミン化合物;を含む接着層;を含む、タイヤコード。 - 前記250,000~350,000の重量平均分子量(Mw)を有する脂環族ポリウレタン樹脂は、炭素数4~30の脂環族グループを1以上含むポリイソシアネートと、ポリオールとの間の反応物を含む、請求項12に記載のタイヤコード。
- 前記脂環族ポリウレタン樹脂は、ジメチロールブタン酸(Dimethylol butanoic acid)およびジメチロールプロピオン酸(Dimethylol propionic acid)からなる群より選ばれた1種以上の化合物から由来した部分を1~20モル%含む、請求項12に記載のタイヤコード。
- 前記繊維基材はポリエステル繊維を含むローコード(raw cord)である、請求項12に記載のタイヤコード。
- 請求項12に記載のタイヤコードを含む、タイヤ。
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