Preparation method of single-component transparent organic silicon sealant

A silicone, one-component technology, used in adhesives, non-polymer adhesive additives, adhesive additives, etc., can solve the problems of limited improvement, changing amine coupling agents, and need to improve, to ensure Curing speed, the effect of increasing adhesion

Pending Publication Date: 2021-04-06
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Application Information

AI Technical Summary

Problems solved by technology

At present, the yellowing performance of one-component transparent dealcoholized room temperature vulcanized silicone sealant at high temperature still needs to be improved. Changed amine coupling agents as tackifiers, such as γ-aminopropyltrimethoxysilane, γ-aminopropyltriethoxysilane, N-(β-aminoethyl)-γ-aminopropyl trimethyl Oxysilane, N-(β-aminoethyl)-γ-aminopropylmethyldimethoxysilane, anilinomethyltriethoxysilane, aminosilane polycondensate, etc.; in order to suppress one-component transparent dealcoholization For the yellowing of type room temperature vulcanized silicone sealants at high temperatures, some patents have adopted measures such as reducing the amount of amine coupling agents in the formula system and partially changing the chemical structure of amine coupl

Method used

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  • Preparation method of single-component transparent organic silicon sealant
  • Preparation method of single-component transparent organic silicon sealant
  • Preparation method of single-component transparent organic silicon sealant

Examples

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Example Embodiment

[0027]Example 1, in the technical solution of the present invention, α, ω-dihydroxy polyimethylsiloxane, reinforcing filler, blocking catalyst, alkoxysilane crosslinking agent, tackifier, curing promoter, and organotin The catalyst and its amount are shown in Table 1.

[0028]The technical solution of the present invention will be described in detail below with a single component transparent high anti-yellow sealing glue prepared in group 1 as each component in Table 1. The method steps are prepared as follows:

[0029]The preparation method of single component transparent silicone sealant, including the steps of:

[0030]Step 1, acquire α, ω-dihydroxy polymethylsiloxane, reinforcing filler, blocking catalyst, alkoxysilane crosslinking agent, tunnel, catalyst, and organotin catalyst; the above components The mass percentage is 100: 5 ~ 30: 0.2 ~ 0.6: 3 ~ 9: 1 ~ 2: 0.5 ~ 1: 0.1 ~ 0.5;

[0031]Step 2,

[0032]The α, ω-dihydroxy polyimethylsiloxane and the reinforcing filler were heated by vacuum kne...

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Abstract

The invention relates to a preparation method of a single-component transparent organic silicon sealant. The single-component transparent organic silicon sealant is prepared from alpha,omega-dihydroxy polydimethylsiloxane, a reinforcing filler, an end-capping catalyst, an alkoxy silane crosslinking agent, a tackifier, a curing accelerator and an organic tin catalyst. The room-temperature vulcanized organic silicon sealant has the advantages of high curing speed, high transparency, high temperature resistance and high yellowing resistance, and has favorable bonding properties for metals, plastics and other substrates.

Description

technical field [0001] The invention relates to the technical field of polymer materials and their production, in particular to a preparation method of a single-component transparent silicone sealant. Background technique [0002] One-component condensation type room temperature vulcanization silicone sealant (also known as one-component condensation type room temperature vulcanization silicone rubber) is the most common and the largest amount of room temperature vulcanization silicone sealant, it is easy to use, therefore, in construction, automobile , Electronic appliances, machinery, chemical industry, light industry and other fields have been widely used. One-component condensation type room temperature vulcanizing silicone sealants can be divided into deketoxime type, dealcoholized type, acetone-free type and deamidated type according to different cross-linking agents. The current practical application in engineering is mainly deketoxime type and deacidification type o...

Claims

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Application Information

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IPC IPC(8): C09J183/04C09J11/04C09J11/06
CPCC09J183/04C09J11/04C09J11/06
Inventor 孙全吉张鹏吴娜范召东王利娜
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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