Curing-reactive organopolysiloxane resin, pressure-sensitive adhesive composition using same, and use thereof
A polysiloxane, curing reaction technology, applied in the field of pressure-sensitive adhesive layer, pressure-sensitive adhesive composition, electronic parts or display equipment, can solve the hardness change, unable to form a transparent adhesive layer, not suitable for display equipment, etc. problem, to achieve the effect of easy industrial production, excellent adhesion and operability
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Embodiment 1
[0158] 36.7 parts by weight of vinyl functional polydimethylsiloxane in component A-b, 100 parts by weight of MQ silicone resin in component B, and 0.287 parts by weight of methylhydrogen polysiloxane whose both ends are terminated by trimethylsiloxy in component C-a 0.0033 parts by weight of component D-a curing retarder, 0.102 parts by weight of component E cyclic siloxane and 62.0 parts by weight of toluene are carefully mixed at room temperature, and 0.0106 parts by weight of component F-b platinum-based hydrosilation reaction catalyst is added to the mixture to form Curing of reactive organopolysiloxane compositions. The content of platinum metal relative to the solid content was 4.24 ppm.
[0159] The composition was cured at a curing temperature of 160° C. according to the methods shown above (measurement of adhesion) and (heat aging). The evaluation results are shown in Table 2 and Table 3.
Embodiment 2
[0161] 36.7 parts by weight of vinyl functional polydimethylsiloxane in component A-b, 100 parts by weight of MQ silicone resin in component B, and 0.466 parts by weight of methylhydrogen polysiloxane whose both ends are terminated by trimethylsiloxy groups in component C-b 0.0033 parts by weight of component D-a curing retarder, 0.102 parts by weight of component E cyclic siloxane and 62.0 parts by weight of toluene are carefully mixed at room temperature, and 0.0106 parts by weight of component F-b platinum-based hydrosilation reaction catalyst is added to the mixture to form Curing of reactive organopolysiloxane compositions. The content of platinum metal relative to the solid content was 4.23 ppm.
[0162] The composition was cured at a curing temperature of 120° C. according to the methods shown above (measurement of adhesion) and (heat aging). The evaluation results are shown in Table 2 and Table 3.
Embodiment 3
[0164] 20.3 parts by weight of vinyl functional polydimethylsiloxane in component A-b, 60.3 parts by weight of MQ silicone resin in component B, and 0.20 parts by weight of methylhydropolysiloxane whose both ends are terminated by trimethylsiloxy groups in component C-a 0.050 parts by weight of component D-b curing retarder and 19.2 parts by weight of toluene were carefully mixed at room temperature, and 0.20 parts by weight of component F-a platinum-based hydrosilation reaction catalyst was added to the mixture to prepare a curing reactive organopolysiloxane composition. The content of platinum metal relative to the solid content was 22 ppm.
[0165] The composition was cured at a curing temperature of 120° C. according to the methods shown above (measurement of adhesion) and (heat aging). The evaluation results are shown in Table 2 and Table 3.
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