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A kind of transparent PVC sealant strip for pouring acrylic and preparation method thereof

A sealing strip and acrylic technology, applied in the field of thermoplastic resin, can solve the problems of poor heat resistance, poor transparency, easy cracking, etc., achieve good sealing, ensure lubricity, and solve the effects of heat resistance and transparency

Active Publication Date: 2022-07-01
成都亚克力板业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a kind of transparent PVC sealing strip for pouring acrylic and its preparation method, solve the problems of poor heat resistance, easy cracking, easy discoloration and poor transparency of the existing PVC sealing strip, and the obtained The transparent PVC sealing strip still maintains airtightness when soaked in MMA at 60°C for 2-15 hours; at the same time, at 120°C for 3-4.5h, the transparent PVC sealing strip still does not turn yellow or crack

Method used

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  • A kind of transparent PVC sealant strip for pouring acrylic and preparation method thereof
  • A kind of transparent PVC sealant strip for pouring acrylic and preparation method thereof
  • A kind of transparent PVC sealant strip for pouring acrylic and preparation method thereof

Examples

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Effect test

Embodiment 1

[0038] A transparent PVC sealing strip for pouring acrylic, the raw materials include PVC powder, DOP (dioctyl phthalate), dibutyltin dilaurate, methyl tin mercaptide, stearic acid and PETS (pentaerythritol stearin) acid ester), weigh the raw materials according to the raw material ratios of each group in Table 1, and set aside.

[0039] Table 1

[0040]

[0041] Then the above-mentioned groups of raw materials are respectively prepared according to the following preparation method to prepare the PVC sealant strip, and the preparation method comprises the following steps:

[0042] a. First add the PVC powder to the mixer for stirring, then add DOP, dibutyltin dilaurate, methyl tin mercaptide, stearic acid and PETS to mix, and when the material is added to 65°C, stop stirring, spare;

[0043] b. Turn on the screw extruder, start the screw of the screw extruder, add the plasticized material in step a into the screw extruder, extrude from the die head of the screw extruder, ...

Embodiment 2

[0049] A method for preparing a transparent PVC sealing strip for pouring acrylic, belonging to the technical field of thermoplastic resins in polymer compounds. The raw materials are obtained according to the raw material ratio of the second group in Example 1, and the following methods are used to prepare the obtained thicknesses of 2 mm respectively. , 5mm, 8mm, 15mm, 20mm PVC sealing tape.

[0050] The specific preparation method is:

[0051] a. Compound plasticization:

[0052] Weigh each component according to the ratio of parts by mass, the particle size of the PVC powder is 80 mesh, first add the PVC powder to the mixer for stirring, then add DOP, dibutyltin dilaurate, methyl tin mercaptide , stearic acid and PETS are mixed, and the material is heated. When the temperature of the material in the mixer reaches 70±5℃, stop stirring and use it for standby;

[0053] b. Extrusion:

[0054] Turn on the screw extruder, preheat to the predetermined temperature and keep it f...

Embodiment 3

[0063] A preparation method of a transparent PVC sealant strip for pouring acrylic, belonging to the technical field of thermoplastic resins in polymer compounds. According to the raw material ratio of the third group in Example 1, PVC powder, DOP, dibutyltin dilaurate, Methyl tin mercaptide, stearic acid and PETS, the preparation method comprises the following steps:

[0064] a. Compound plasticization:

[0065] Weigh the components according to the ratio of parts by mass, first add the PVC powder to the mixer for stirring, then add DOP, dibutyltin dilaurate, methyl tin mercaptide, stearic acid and PETS to mix, and the materials are mixed. Heating, when the temperature of the material in the mixer reaches 70±5℃, stop stirring and set aside;

[0066] b. Extrusion:

[0067] Start the screw extruder, preheat to a predetermined temperature and keep it for 1 h, start the screw of the screw extruder, add the plasticized material in step a into the screw extruder, and extrude from...

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Abstract

The invention discloses a transparent PVC sealing strip for pouring acrylic and a preparation method of the transparent PVC sealing strip, and relates to the technical field of thermoplastic resins in polymer compounds. The raw material composition in parts by mass comprises: PVC powder: 100 parts; DOP: 48-58 parts; Dibutyltin dilaurate: 2-3 parts; Methyl tin mercaptide: 0.1-0.2 parts; Stearic acid: 1-2 parts; PETS: 0.1-0.2 parts, to obtain transparent PVC sealant strip, and can be immersed in MMA at 60℃ for 2~15h and still maintain sealing; at the same time, under 120℃ environment for 3-4.5h, the transparent PVC sealant strip still does not turn yellow or crack.

Description

technical field [0001] The invention relates to the technical field of thermoplastic resins in polymer compounds, in particular to a transparent PVC sealing strip for pouring acrylic and a preparation method thereof. Background technique [0002] The production mold for pouring acrylic is a cavity composed of PVC sealing strips around the middle of two flat glass. After the acrylic prepolymer is poured in the cavity, water bath polymerization and high temperature polymerization are carried out. The polymerization process in the production of pouring acrylic has high requirements on the sealing properties of the PVC sealant strip, such as: [0003] 1. It needs to be able to withstand the immersion of MMA (acrylic resin) at about 60 ° C for about 2~18 hours, and maintain the water tightness in the water bath. The duration is related to the thickness of the plate; [0004] 2. After soaking, it must be baked at a high temperature of 120 °C, and there will be no appearance chan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/06C08K5/57C08K5/103
CPCC08K5/57C08K5/103C08L2201/08C08L2201/10C08L27/06
Inventor 吴志雄邓盼
Owner 成都亚克力板业有限公司