High-strength addition-type mould rubber composition and preparation method thereof

A composition and additive molding technology, which is applied in the field of mold glue, can solve the problems of reducing mold glue turning times and quality, reducing mold glue heat shrinkage, and low tear strength, so as to improve mold turning quality and improve The effect of turning over times and improving the mechanical strength

Active Publication Date: 2016-01-20
ZHEJIANG XINAN CHEM INDAL GROUP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Patent CN201410557237.X proposes to use supramolecular montmorillonite to strengthen mold glue, which can improve the thermal stability and tensile strength of mold glue; patent CN201310414939.8 discloses a new type of mold glue and its preparation method. The organic-inorganic synergistic toughening effect of ester and silicon micropowder reduces the thermal shrinkage rate of the prepared mold glue and improves the heat resistance; patent CN201310092828. The heat shrinkage rate of the mold glue; none of the above patents involves the tear strength of the mold glue, which is difficult to use in high-precision mold making
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Method used

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  • High-strength addition-type mould rubber composition and preparation method thereof
  • High-strength addition-type mould rubber composition and preparation method thereof
  • High-strength addition-type mould rubber composition and preparation method thereof

Examples

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Example Embodiment

[0036] Example 1:

[0037] Base rubber preparation: 60 parts of 10000mPa·s vinyl-terminated silicone oil with a specific surface area of ​​300m 2 / g of fumed silica (Japan Tokuyama QS-30) 32 parts, 8 parts of hexamethylsilazane, 1.6 parts of water were added to the kneader, stirred at room temperature for 1 hour, heated to 150 ℃ and continued stirring After 2 hours, add 40 parts of 10000mPa·s vinyl-terminated silicone oil to dilute, and obtain a base rubber after cooling.

[0038] Preparation of component A: Take 87.5 g of the above base gum, add 0.1 g of platinum catalyst (platinum content is 3000 ppm), and stir evenly.

[0039] Preparation of component B: Take 44.6g of the above base gum and add vinyl silicone resin (vinyl group amount 4.44×10 -4 mol / g) 20g, high concentration vinyl silicone oil (vinyl group amount 1.35×10 -3 mol / g) 5g, hydrogen-containing silicone oil with hydrogen only in the side chain (SiH group amount 8.0×10 -3 mol / g) 14g, only hydrogen-containing silicone oil...

Example Embodiment

[0041] Example 2:

[0042] Base rubber preparation: 60 parts of 10000mPa·s vinyl-terminated silicone oil with a specific surface area of ​​300m 2 Add 30 parts of fumed silica (Japan Tokuyama QS-30), 7.5 parts of hexamethylsilazane, and 1.5 parts of water to the kneader. After stirring for 1 hour at room temperature, the temperature is increased to 150°C and the stirring is continued After 2 hours, add 40 parts of 10000mPa·s vinyl-terminated silicone oil to dilute, and obtain a base rubber after cooling.

[0043] A component preparation: Take 77.5g of the above base gum, add 0.1g of platinum catalyst (platinum content is 3000ppm), and stir evenly.

[0044] Preparation of component B: take 52.5g of the above base gum and add vinyl silicone resin (vinyl group amount 4.44×10 -4 mol / g) 10g, high-concentration vinyl silicone oil (vinyl group amount 1.35×10 -3 mol / g) 5g, hydrogen-containing silicone oil with hydrogen only in the side chain (SiH group amount 8.0×10 -3 mol / g) 9.1g, only hydro...

Example Embodiment

[0046] Example 3

[0047] Base rubber preparation: 60 parts of 10000mPa·s vinyl-terminated silicone oil with a specific surface area of ​​300m 2 / g of fumed silica (Japan Tokuyama QS-30) 32 parts, 8 parts of hexamethylsilazane, 1.6 parts of water were added to the kneader, stirred at room temperature for 1 hour, heated to 150 ℃ and continued stirring After 2 hours, add 40 parts of 10000mPa·s vinyl-terminated silicone oil to dilute, and obtain a base rubber after cooling.

[0048] Preparation of component A: Take 87.5 g of the above base gum, add 0.1 g of platinum catalyst (platinum content is 3000 ppm), and stir evenly.

[0049] Preparation of component B: Take 44.6g of the above base gum and add vinyl silicone resin (vinyl group amount 4.44×10 -4 mol / g) 20g, high concentration vinyl silicone oil (vinyl group amount 4×10 -4 mol / g) 5g, hydrogen-containing silicone oil (SiH group amount 8.0×10-3mol / g), the crosslinking agent containing hydrogen on the side chain only 14g, hydrogen-cont...

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Abstract

The invention provides a high-strength addition-type mould rubber composition and a preparation method thereof. The composition comprises high-concentration vinyl silicone oil which can form a local high crosslink density meshwork in the preparing process and play an anchoring role together with vinyl silicone resin and white carbon black in the composition, therefore, the mechanical strength of addition-type mould rubber is improved, the tearing strength can be more than 30 N/m, the mould turning times is significantly increased, the mould turning quality is significantly improved, and the composition can be used for high-precision model making.

Description

technical field [0001] The invention relates to the technical field of mold glue, in particular to an addition-type mold glue, in particular to a high-strength addition-type mold glue composition and a preparation method thereof. Background technique [0002] Mold glue can be divided into addition mold glue and condensation mold glue. Since the condensation mold glue will release small molecules (such as methanol) during the curing process, it will cause pollution and is not environmentally friendly, and its deep curing is not good, so it is not suitable Applied to thicker products. Compared with condensation-type mold glue, addition-type mold glue does not release small molecules when cured, it is easy to deep-cure, the linear shrinkage rate is less than 0.1%, and the dimensional stability is better. It is more suitable for the production of precision molds and delicate replicas. [0003] Patent CN201410557237.X proposes to use supramolecular montmorillonite to strengthen ...

Claims

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Application Information

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IPC IPC(8): C08L83/07C08L83/05C08K3/36
Inventor 胡杨飞王轲徐晓明吴克金红君易万彬应流渊朱利明吴欣宏
Owner ZHEJIANG XINAN CHEM INDAL GROUP
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