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Supramolecular montmorillonite-reinforced silica gel mold adhesive and preparation method thereof

A technology of montmorillonite and mold glue, which is applied in the field of supramolecular montmorillonite reinforced silica gel mold glue and its preparation, can solve the problems of short mold life, low strength, and increased production costs of enterprises, and achieve low cost and thermal stability High strength and high crosslink density

Active Publication Date: 2015-01-14
SHANGHAI UNIV OF ENG SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the long-term use process, it was found that under the condition of high temperature and high humidity, the strength of the RTV mold made by the existing mold glue is low, resulting in a short service life of the mold, which greatly increases the production cost of the enterprise

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] In a three-necked flask equipped with a reflux condenser, a mechanical stirrer and a thermometer, add 10g of vinyl-terminated polysiloxane and 20g of propanol solution, and raise the temperature to 80°C to fully dissolve the polysiloxane in propanol . Add 5g of maleic anhydride monomer, stir for 1h, then add 1g of initiator BPO, and continue stirring for 2h. After the reaction was completed, the product was poured out, added to propanol for precipitation and separation, and then the precipitate was washed with distilled water and dried in a vacuum oven at 60° C. to constant weight. The dried product was heated to reflux in acetone for 3 hours to remove unreacted monomers and initiators, and the purified product was then dried in a vacuum oven at 60°C to constant weight for use. Add 20g HDI in the four-necked flask, then add 20g of the above-mentioned product, the mixture is at room temperature and logical N 2After stirring for 3 hours under normal circumstances, a mil...

Embodiment 2

[0045] In a three-necked flask equipped with a reflux condenser, a mechanical stirrer and a thermometer, add 15g of vinyl-terminated polysiloxane and 30g of propanol solution, and raise the temperature to 85°C to fully dissolve the polysiloxane in propanol . Add 10 g of maleic anhydride monomer, stir for 2 h, then add 2 g of initiator BPO, and continue stirring for 3 h. After the reaction was completed, the product was poured out, added to propanol for precipitation and separation, and then the precipitate was washed with distilled water and dried in a vacuum drying oven at 70°C until constant weight. The dried product was heated to reflux in acetone for 4 hours to remove unreacted monomers and initiators, and the purified product was then dried in a vacuum oven at 70°C to constant weight for use. Add 30 g of HDI to a four-necked flask, and then add 30 g of the above product, and the mixture is stirred at room temperature under nitrogen for 3.5 h to obtain a milky white visco...

Embodiment 3

[0050] In a three-necked flask equipped with a reflux condenser, a mechanical stirrer and a thermometer, add 20g of vinyl-terminated polysiloxane and 40g of propanol solution, and raise the temperature to 90°C to fully dissolve the polysiloxane in propanol . Add 15g of maleic anhydride monomer, stir for 3h, then add 3g of initiator BPO, continue stirring for 4h. After the reaction was completed, the product was poured out, added to propanol for precipitation and separation, and then the precipitate was washed with distilled water and dried in a vacuum oven at 80°C until it reached a constant weight. The dried product was heated to reflux in acetone for 5 hours to remove unreacted monomers and initiators, and the purified product was then dried in a vacuum oven at 80°C to constant weight for use. Add 40g HDI in the four-necked flask, then add 40g of the above-mentioned product, the mixture is at room temperature and logical N 2 After stirring for 4 hours under normal circumst...

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Abstract

The invention relates to a supramolecular montmorillonite-reinforced silica gel mold adhesive and a preparation method thereof. The supramolecular montmorillonite-reinforced silica gel mold adhesive is prepared from the following raw materials in parts by weight: 85-90 parts of vinyl-terminated polysiloxane containing UPy unit at side group, 5-10 parts of hydrogen-containing polysiloxane, 0.3-0.5 part of catalyst and 10-20 parts of modified montmorillonite. The preparation method comprises the following steps: a) proportionally adding the modified montmorillonite into the vinyl-terminated polysiloxane containing UPy unit at side group, and stirring for 40-60 minutes; b) adding the hydrogen-containing polysiloxane and catalyst, stirring uniformly, vacuumizing to eliminate bubbles, and carrying out curing reaction at the room temperature of 20-30 DEG C, thereby obtaining the supramolecular montmorillonite-reinforced silica gel mold adhesive. Compared with the prior art, a UPy self-identification pairing system, which has high hydrogen bond action, exists, so the silica gel mold adhesive has higher strength.

Description

technical field [0001] The invention belongs to the field of silica gel, and in particular relates to a supramolecular montmorillonite reinforced silica gel mold glue and a preparation method thereof. Background technique [0002] Silica gel, also known as silicone rubber, has the advantages of high temperature resistance, corrosion resistance, strong tear resistance, and high simulation accuracy, so it is widely used in the manufacture of handicraft molds. [0003] The silicone specially used to produce handicraft molds is called mold glue, and is generally made of room temperature vulcanized silicone rubber (RTV for short). RTV is a polymer elastomer. It is a synthetic material with silicon atoms and oxygen atoms as the skeleton. Each silicon atom contains 1 to 2 organic groups (mainly methyl groups). O-Si chain belt fibrous polymer. Therefore, RTV has the following properties: good chemical stability, non-toxic, non-corrosive; good fluidity, can automatically fill the m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L51/08C08L83/05C08K9/04C08K3/34C08F283/12C08F222/06C08F8/32
Inventor 王锦成曹付海张广建袁章林韦小凤郑晓昱
Owner SHANGHAI UNIV OF ENG SCI
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