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Double-component silicone structural sealant for heat mirror hollow glass and preparation method thereof

A two-component, sealant technology, applied in the field of sealants, can solve the problem that the hardness, modulus, flame retardancy and thixotropy of the sealant cannot be met, the adhesive force and curing time of the hot mirror film cannot be met, and the moisture Wetness, mutual penetration and weak bonding ability, etc., to improve hardness, facilitate construction, and reduce heat transfer rate

Active Publication Date: 2014-05-28
ZHENGZHOU ZHONGYUAN SILANDE HIGH TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the main chain of the silicone sealant is a non-polar -Si-O bond, and the hot mirror film is generally a polyester film, its main chain is a non-polar -COO bond, the wettability and mutual penetration between the two And the bonding ability is weak, so the general silicone sealant has poor adhesion to the hot mirror film
In addition, the existing silicone structural sealants on the market have low hardness, small modulus, and high elasticity. The shrinkage and expansion deformation caused by the influence of the external environment temperature is relatively large, which easily causes deformation of the hot mirror film and increases the difficulty of making hot mirror insulating glass.
At present, the limitations of these two sealants limit the popularization and application of large-area hot mirror insulating glass
[0004] In the prior art, such as Chinese patent CN101831271A discloses a two-component silicone sealant for insulating glass, which has low water vapor transmission rate, suitable modulus, and good weather resistance, but because of its use of conventional viscosity-increasing agent, without inhibitors and surfactants, can only be used for ordinary insulating glass, and cannot meet the requirements of hot mirror film for adhesion and curing time
Another example is CN102352214A discloses a two-component silicone structural sealant, which has good aging resistance and cohesiveness, but it uses conventional untreated fillers, the addition method is single, and there is no flame retardant, Surfactants, tackifiers and inhibitors cannot meet the requirements of the insulating glass hot mirror film on the hardness, modulus, flame retardancy and thixotropy of the sealant

Method used

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  • Double-component silicone structural sealant for heat mirror hollow glass and preparation method thereof
  • Double-component silicone structural sealant for heat mirror hollow glass and preparation method thereof
  • Double-component silicone structural sealant for heat mirror hollow glass and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The white two-component silicone structural sealant for heat mirror insulating glass in this embodiment includes component A and component B, and the components and quality of component A are:

[0035]

[0036] Each component and mass parts in the B component are:

[0037]

[0038]

[0039] The mass ratio of component A to component B is 8:1.

[0040] The tackifier is a silicone oligomer containing acyloxy groups with a degree of polymerization of 2. The preparation method is to add allyl acrylate to a mixed solution of low-hydrogen silicone oil and Pt catalyst for hydrosilylation reaction. The reaction temperature is The temperature is 60°C, the reaction time is 5h, and the solvent is removed after the reaction.

[0041] The preparation method of the two-component silicone structural sealant comprises the following steps:

[0042] 1) Weigh hydroxyl-terminated polydimethylsiloxane with a viscosity of 5000cp, alkyl-terminated polydimethylsiloxane with a viscos...

Embodiment 2

[0046] The yellow two-component silicone structural sealant for heat mirror insulating glass of this embodiment includes component A and component B, and the components and quality of component A are:

[0047]

[0048]

[0049] Each component and mass parts in the B component are:

[0050]

[0051] The mass ratio of A component to B component is 14:1.

[0052] The tackifier is a silicone oligomer containing an epoxy group with a degree of polymerization of 4. The preparation method is to add allyl glycidyl ether to a mixed solution of low hydrogen-containing silicone oil and a Pt catalyst for hydrosilylation. The reaction temperature is 20°C, the reaction time is 9 hours, and the solvent is removed after the reaction.

[0053] The preparation method of the two-component silicone structural sealant comprises the following steps:

[0054] 1) Weigh hydroxyl-terminated polydimethylsiloxane with a viscosity of 10000cp, alkyl-terminated polydimethylsiloxane with a viscosi...

Embodiment 3

[0058] The red two-component silicone structural sealant for hot mirror insulating glass in this embodiment includes component A and component B, and the components and quality of component A are:

[0059]

[0060]

[0061] Each component and mass parts in the B component are:

[0062]

[0063] The mass ratio of A component to B component is 20:1.

[0064] The tackifier is an alkoxy-containing silicone oligomer with a polymerization degree of 6. The preparation method is to add vinyltrimethoxysilane to a mixed solution of low hydrogen-containing silicone oil and Pt catalyst for hydrosilylation reaction. The reaction temperature is 120°C, the reaction time is 7 hours, and the solvent is removed after the reaction.

[0065] The preparation method of the two-component silicone structural sealant comprises the following steps:

[0066] 1) Weigh hydroxyl-terminated polydimethylsiloxane with a viscosity of 150,000 cp, alkyl-terminated polydimethylsiloxane with a viscosity...

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Abstract

The invention discloses a double-component silicone structural sealant for heat mirror hollow glass and a preparation method of the sealant. The sealant comprises a component A and a component B, wherein the component A comprises hydroxyl-terminated polydimethylsiloxane, alkyl-terminated polydimethylsiloxane, hollow microsphere, ceramic microbead, metal hydroxide, metal oxide, activated calcium carbonate, inorganic pigment and a surfactant; the component B comprises alkyl-terminated polydimethylsiloxane, a coupling agent, a cross-linking agent, a catalyst, an inhibitor, a thickening agent, and silicon dioxide. The preparation method of the sealant comprises the following steps: 1) taking each ingredient in the component A to be mixed uniformly under the vacuum condition; 2) taking each ingredient in the component B to be mixed uniformly under the vacuum condition; 3) mixing the component A and the component B at room temperature according to the weight ratio of (8:1) to (20:1), and at last obtaining the sealant. The double-component silicone structural sealant is good in adhesiveness, high in curing speed, good in sealing performance, high in hardness and modulus, and excellent in thermal barrier effect, and suitable for sealing and bonding of heat mirror film, glass and metal materials etc.

Description

technical field [0001] The invention belongs to the technical field of sealants, and in particular relates to a two-component silicone structural sealant for hot mirror insulating glass and a preparation method thereof. Background technique [0002] Hot mirror insulating glass can be regarded as the most energy-saving glass product in the world at present. It is a double-cavity hollow or multi-cavity hollow structure formed by suspending a layer of clear-coated polyester film between two or more pieces of glass. Compared with ordinary insulating glass, it has the following characteristics: high-efficiency shielding of ultraviolet rays, which can shield 99.5% of ultraviolet rays; high-efficiency sound insulation, at least 5 decibels more barrier than ordinary insulating glass; Electricity and energy expenses; no condensation, the excellent thermal insulation performance of the heat mirror keeps the temperature difference on both sides of the insulating glass, reducing the hea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J183/06C09J183/04C09J11/04C09J11/06C03C27/10
Inventor 张燕红杨晓菲张燕玲张荣荣冯培杨玉宁杨秀丽
Owner ZHENGZHOU ZHONGYUAN SILANDE HIGH TECH CO LTD
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