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A kind of preparation method and application of ring structure hydroxyl polysiloxane

The technology of hydroxypolysiloxane and hydroxypolydimethylsiloxane is applied in the field of preparation of hydroxyl base polymers with ring structure, and can solve the problems of poor physical and mechanical strength, broken and cracked, unsatisfactory reinforcement effect, etc. question

Active Publication Date: 2021-09-14
周群邦
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Transparent silicone rubber potting materials are generally divided into addition-type potting materials and condensation-type potting materials, but transparent silicone rubber potting materials have poor physical and mechanical strength, and the shielding end will be broken and cracked by a slight external force. Waterproof reliability has a great impact
In order to solve the physical and mechanical properties of transparent silicone rubber potting materials, the industry generally adds expensive silicone resin materials, but the reinforcing effect is not ideal and the price is expensive

Method used

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  • A kind of preparation method and application of ring structure hydroxyl polysiloxane
  • A kind of preparation method and application of ring structure hydroxyl polysiloxane
  • A kind of preparation method and application of ring structure hydroxyl polysiloxane

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preparation example Construction

[0029] The preparation method of the above-mentioned hydroxyl polysiloxane with ring structure comprises the following steps:

[0030] (1) Add 291 to 297 parts by weight of α, ω-dihydroxy polydimethylsiloxane and 0.3 to 1.5 parts by weight of platinum catalyst into a reactor with constant temperature function, stir for 5 minutes, and At 2°C, 1.5 to 3 parts by weight of hydrogen-containing cyclic bodies were added dropwise, and stirred for 5 minutes. Set the material temperature to 35°C;

[0031] (2) The temperature rises to 35±2°C, heat preservation reaction for 1.8 to 2 hours, add 0.01 to 0.05 parts by weight of 1-ethynyl-1-cyclohexanol, stir for 5 minutes, set the material temperature to 80°C; the stirring speed of the reaction 180-200 rpm;

[0032] (3) The temperature is raised to 80±2°C, and the low molecules are removed in vacuum for 1 hour, and the vacuum degree is -0.095MPa~-0.1MPa; the temperature is lowered, and the material is discharged to obtain a hydroxypolysilo...

Embodiment 1

[0036] The raw materials used in this embodiment and the ratio of raw materials are as shown in Table 1:

[0037] Table 1 raw materials and proportioning:

[0038]

[0039]

[0040] Using the ratio of raw materials in Table 1, the hydroxypolysiloxane with ring structure of the present invention is prepared through the following steps:

[0041] (1) Add the No. 1 and No. 2 materials into the reactor with constant temperature function, start stirring, and the rotation speed is 190 rpm. After 5 minutes, add No. 3 materials at 23±2°C, and set the material temperature to 35 ℃;

[0042] (2) The temperature rises to 35±2°C, heat preservation reaction for 1.8 hours, add the material in No. 4, and set the material temperature to 80°C;

[0043] (3) The temperature is raised to 80±2° C., and the low molecules are removed in vacuum for 1 hour; the temperature is lowered, and the material is discharged to obtain a hydroxy polysiloxane with a ring structure.

[0044] Add 1 part of t...

Embodiment 2

[0046] The raw materials used in this embodiment and the ratio of raw materials are as shown in Table 2:

[0047] Table 2 raw materials and ratio

[0048]

[0049]

[0050] Using the ratio of raw materials in Table 2, the hydroxypolysiloxane with ring structure of the present invention is prepared through the following steps:

[0051] (1) Add the No. 1 and No. 2 materials into the reactor with constant temperature function, start stirring, and the rotation speed is 190 rpm. After 5 minutes, add No. 3 materials at 23±2°C, and set the material temperature to 35 ℃;

[0052] (2) The temperature rises to 35±2°C, heat preservation reaction for 1.8 hours, add the material in No. 4, and set the material temperature to 80°C;

[0053] (3) The temperature is raised to 80±2° C., and the low molecules are removed in vacuum for 1 hour; the temperature is lowered, and the material is discharged to obtain a hydroxy polysiloxane with a ring structure.

[0054] Add 1 part of tetraethoxys...

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Abstract

The invention provides a method for preparing hydroxy polysiloxane with ring structure and its application. The hydroxy polysiloxane with ring structure prepared by it is colorless and transparent fluid, which can be used for transparent condensation type silicone rubber two-component potting It can be used as a base polymer in sealing materials, and can also be used in combination with α,ω-dihydroxy polydimethylsiloxane in transparent condensation-type silicone rubber two-component potting materials, which can greatly improve the performance of transparent condensation-type silicone rubber potting. The toughness of the sealing material. The product introduces a ring structure into the molecular structure of the linear hydroxypolysiloxane, and the silicone elastomer after adding the hydroxypolysiloxane with the ring structure has a significant improvement in physical and mechanical properties, with very good toughness, elongation The rate is as high as 900%.

Description

technical field [0001] The invention belongs to the field of modified base polymers, and in particular relates to a preparation method and application of a ring-shaped structure hydroxyl base polymer used for transparent condensation type two-component room temperature vulcanized silicone rubber. Background technique [0002] With the development of society, electronic products, lighting products and lighting products are becoming more and more popular, and their requirements for light transmission, water resistance and physical and mechanical properties of materials are also getting higher and higher. Therefore, the demand for highly transparent weather-resistant packaging materials is also increasing. [0003] Transparent silicone rubber potting materials are generally divided into addition-type potting materials and condensation-type potting materials, but transparent silicone rubber potting materials have poor physical and mechanical strength, and the shielding end will ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G77/38C08G77/16C08L83/06C08K5/5415C08K5/57
CPCC08G77/16C08G77/38C08K5/5415C08K5/57C08L2201/10C08L83/06
Inventor 周群邦
Owner 周群邦
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