Elastomer silicone vulcanizates
An elastomer, static vulcanization technology, applied in the field of elastomer composition, can solve problems such as incompatibility and difficulty in obtaining a homogeneous mixture
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Examples
Embodiment 1
[0059] GP-50 (60 g) and Luperox F (0.2 g) were mixed on an open mill to form a silicone compound. The silicone compound (60.2 g) and EPDM (140 g) were added to a 379 ml Haake internal mixer equipped with a Banbury rotor at 150°C and 100 rpm. After about 2.5 minutes and before the torque was increased, the material was removed and placed in the press at 177°C for 10 minutes. Divide the elastomer composition into parts. 1A was further compounded as is. 1B was heat aged at 16hr / 90°C before compounding. The resulting EPDM elastomer composition (50 g) was compounded with Varox (3 g) and N990 (8 g), AustinBlack (4 g) and ZnO (2 g) on an open mill and the components were mixed until homogeneous.
Embodiment 2
[0060]GP-50 (60 g) and EPDM (140 g) were added without compounding to a 379 ml Haake internal mixer equipped with a Banbury rotor at 150°C and 100 rpm. After about 2.5 minutes, the elastomer blend was removed. The elastomer blend was divided into parts. 2A was further compounded as it is. 2B was heat aged at 16hr / 90°C before compounding. The resulting elastomer blend (50 g) was compounded with Luperox F (0.05 g), Varox (3 g) and N990 (8 g), Austin Black (4 g) and ZnO (2 g) on an open mill to obtain the 1 of the same final ingredients, and mix the components until homogeneous.
[0061] Examples 1-2 were pressure cured at 177°C for 20 minutes. The physical properties of the resulting cured elastomeric compositions and blends are summarized in Table 1.
Examples#
Embodiment 3
[0063] For Example 3A, Silicone Compound A (142 g) and G902 (344 g) were added to a 310 ml Haake internal mixer equipped with Banbury rollers at 90°C and 125 rpm (rev / min). middle. When 130°C was reached and before torque was increased, the blend was removed and then placed in a 200°C press for 10 minutes to form a FKM elastomeric composition with an ML(1+10) of 43 at 121°C. Sample 3B is the same as Sample 3A except that for Sample 3B the blend was brought to 160°C and reacted, then removed 5 minutes after the torque was increased to give a ML(1+10) of 67 at 121°C FKM elastomer composition. The resulting FKM elastomer composition (100 parts) was then compounded with ZnO (3.44 parts), Varox (2.06 parts) and TAIC (2.75 parts) on a Haake mill until homogeneous. The samples were pressure cured at 160°C for 10 minutes and then post-cured at 200°C for 4 hours. Sample 3A has a Shore A durometer hardness of 60, a tensile strength of 7.39MPa, an elongation of 320%, and a permeabilit...
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Abstract
Description
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