Primer for bonding silicon rubber to polyamide material and preparation method of primer
A technology of polyamide and primer, which is applied in the field of silicone rubber, can solve the problems of poor bonding effect with PA and poor storage stability, and achieve the effect of improving bonding and excellent bonding performance
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[0030] The present invention also provides a method for preparing a primer bonding silicone rubber and polyamide material. The method includes the following steps:
[0031] S1. Prepare component A. Add orthosilicate to the first solvent and stir for 5-10min in airtight; add titanate under stirring and stir airtightly for 5-10min; add silane coupling agent under stirring and stir airtightly for 5 -10min; Add high-hydrogen siloxane under stirring, airtightly stir for 30-60min; get the component A of the primer after standing and aging reaction;
[0032] S2, prepare component B, add polyamide oligomer to the second solvent, and stir to obtain component B;
[0033] S3. Prepare a primer, mix and stir component A and component B to obtain a primer that is bonded with silicone rubber and polyamide material;
[0034] Among them, the total amount of the first solvent and the second solvent is 100 parts by weight, the polyamide oligomer is 0.05-5 parts by weight, the silane coupling agent is 0....
Example Embodiment
[0046] Example 1
[0047] Preparation of polyamide oligomer:
[0048] In a 150mL three-necked flask equipped with water trap, reflux condenser, stirrer and thermometer, add 20.0g hexamethylenediamine, 40.3g adipic acid (amine: acid=0.625:1) and 0.1g catalyst BC-98, Under N2 protection, slowly increase the temperature to 100°C, start to stir slowly, slowly increase the temperature to 150°C, keep it for 2h, add 0.1g of heat stabilizer TP2Pi, and then increase the temperature to 200°C at a uniform rate within 2h, keep it for 1h The polyamide oligomer S1 was obtained.
Example Embodiment
[0049] Example 2
[0050] Polyamide oligomer preparation:
[0051] In a 150mL three-necked flask equipped with water trap, reflux condenser, stirrer and thermometer, add 10.0g hexamethylenediamine, 10.0g o-phenylenediamine, 50.5g sebacic acid (amine: acid=0.71:1) and 0.12g catalyst BC-98, under the protection of N2, slowly increase the temperature to 120℃, start to stir slowly, slowly increase the temperature to 160℃, keep it for 1h, add 0.15g heat stabilizer TP2Pi, and then the temperature will rise at a constant rate within 1 h The temperature was kept at 190°C for 2 hours to obtain polyamide oligomer S2.
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