Solventless cured release coating-forming organopolysiloxane composition and sheet-form substrate having cured release coating
A release coating, polysiloxane technology, applied in the direction of coatings, chemical instruments and methods, synthetic resin layered products, etc., can solve the problem of not realizing the friction coefficient of the cured coating, the increase in slidability, not mentioned Reduce the friction coefficient of the cured coating and other problems such as sliding, to achieve the effect of excellent residual adhesion, improved sliding, and improved peeling performance
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Synthetic example 1
[0059] Synthesis Example 1 Synthesis (1): (Vi(CH 3 ) 2 SiO 1 / 2 ) 4 (Vi(CH 3 ) SiO 2 / 2 ) 2 ((CH 3 ) 2 SiO) 54 (SiO 4 / 2 ) will [Vi(CH 3 ) 2 SiO 1 / 2 ] 4 SiO 4 / 2(21.6g), tetramethyltetravinylcyclotetrasiloxane (8.60g), octamethylcyclotetrasiloxane (200g) and trifluoromethanesulfonic acid (1.2g) were introduced into the reaction vessel, and Stir for 6 hours at a temperature of 80-90°C. The resulting reaction mixture was then cooled to room temperature. Calcium carbonate powder (1.0 g) was added to the cooled reaction mixture, followed by stirring for 3 hours and filtering. The filtrate was stripped for 2 hours at a pressure of 40 mbar (4000 Pa) and a temperature of about 150°C. The viscosity of the stripped residue was 46 mPa.s, and its vinyl content was 3.5% by weight.
Synthetic example 2
[0060] Synthesis Example 2 Synthesis (2): (Vi(CH 3 ) 2 SiO 1 / 2 ) 4 (Vi(CH 3 ) SiO 2 / 2 ) 1.8 ((CH 3 ) 2 SiO) 103 (SiO 4 / 2 ) will [Vi(CH 3 ) 2 SiO 1 / 2 ] 4 SiO 4 / 2 (21.6g), tetramethyltetravinylcyclotetrasiloxane (7.74g), octamethylcyclotetrasiloxane (381g) and trifluoromethanesulfonic acid (1.2g) were introduced into the reaction vessel, and Stir for 6 hours at a temperature of 80-90°C. The resulting reaction mixture was then cooled to room temperature. Calcium carbonate powder (1.0 g) was added to the cooled reaction mixture, followed by stirring for 3 hours and filtering. The filtrate was stripped for 2 hours at a pressure of 40 mbar (4000 Pa) and a temperature of about 150°C. The viscosity of the stripped residue was 122 mPa.s, and its vinyl content was 1.9% by weight.
Synthetic example 3
[0061] Synthesis Example 3 Synthesis (3): (Vi(CH 3 ) 2 SiO 1 / 2 ) 4 (Vi(CH 3 ) SiO 2 / 2 ) 21.9 ((CH 3 ) 2 SiO) 136 (SiO 4 / 2 ) will [Vi(CH 3 ) 2 SiO 1 / 2 ] 4 SiO 4 / 2 (21.6g), tetramethyltetravinylcyclotetrasiloxane (94.2g), octamethylcyclotetrasiloxane (503g) and trifluoromethanesulfonic acid (1.2g) were introduced into the reaction vessel, and Stir for 6 hours at a temperature of 80-90°C. The resulting reaction mixture was then cooled to room temperature. Calcium carbonate powder (1.0 g) was added to the cooled reaction mixture, followed by stirring for 3 hours and filtering. The filtrate was stripped for 2 hours at a pressure of 40 mbar (4000 Pa) and a temperature of about 150°C. The viscosity of the stripped residue was 111 mPa.s, and its vinyl content was 5.6% by weight.
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