Preparation method of polyester industrial yarn for tire cord
A technology for tire cord and polyester industrial yarn, applied in the field of modified polyester fiber, can solve the problem of difficulty in further improving the bonding performance between polyester cord and rubber, and achieve improved bonding strength, good fatigue resistance, and improved adhesion. effect of cooperation
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Embodiment 1
[0066] The preparation method of the polyester industrial yarn that is used for tire cord, the steps are as follows:
[0067] (1) prepare modified polyester;
[0068] (1.1) Preparation of 2,6,6-trimethyl-2,5 heptanediol;
[0069] (a) Mix potassium hydroxide aqueous solution and isobutanol at a ratio of 5:1 in a molar ratio of isobutanol to potassium hydroxide, and react for 4 hours at a temperature of 100° C. to obtain potassium isobutoxide. During the reaction, With stirring, the mass concentration of potassium hydroxide aqueous solution is 43%;
[0070] (b) After removing the impurities in the system of (a) and lowering to normal temperature, add xylene to the system of (a) according to the molar ratio of potassium isobutoxide to xylene of 1.3:2.2, and cool to 1°C ;
[0071] (c) After adding 3-methyl-3-hydroxybutyne and 2,2-dimethylpropanal into the system of (b), react at a temperature of 25°C for 3 hours, then carry out cooling crystallization and centrifugation And dr...
Embodiment 2
[0086] The preparation method of the polyester industrial yarn that is used for tire cord, the steps are as follows:
[0087] (1) prepare modified polyester;
[0088] (1.1) Preparation of 2,6,6-trimethyl-2,5 heptanediol;
[0089] (a) Mix potassium hydroxide aqueous solution and isobutanol at a ratio of 5.5:1 in a molar ratio of isobutanol to potassium hydroxide, and react for 5 hours at a temperature of 100° C. to prepare potassium isobutoxide. During the reaction, With stirring, the mass concentration of potassium hydroxide aqueous solution is 40%;
[0090] (b) After removing impurities in the system of (a) and lowering to normal temperature, add xylene to the system of (a) according to the molar ratio of potassium isobutoxide and xylene of 1.3:2.0, and cool to 3°C ;
[0091] (c) After adding 3-methyl-3-hydroxybutyne and 2,2-dimethylpropanal into the system of (b), react at a temperature of 30°C for 3 hours, then carry out cooling crystallization and centrifugation And dry ...
Embodiment 3
[0102] The preparation method of the polyester industrial yarn that is used for tire cord, the steps are as follows:
[0103] (1) prepare modified polyester;
[0104] (1.1) Preparation of 2,6,6-trimethyl-5-ethyl-2,5-heptanediol;
[0105] (a) Mix potassium hydroxide aqueous solution and isobutanol according to the ratio of isobutanol to potassium hydroxide molar ratio of 5:1, and react at a temperature of 105°C for 4.5h to obtain potassium isobutoxide. During the reaction Accompanied by stirring, the mass concentration of potassium hydroxide aqueous solution is 48%;
[0106] (b) After removing impurities in the system of (a) and lowering to normal temperature, add xylene to the system of (a) according to the molar ratio of potassium isobutoxide to xylene of 1.5:2.5, and cool to 0°C ;
[0107] (c) After adding 3-methyl-3-hydroxybutyne and 2,2-dimethyl-3-pentanone into the system of (b), react at 30°C for 3 hours, and then carry out cooling crystallization , centrifugal separ...
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