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Neutral silicone weather resistant glue formula and technique for preparing the same

A silicone weather-resistant adhesive, neutral technology, applied in the direction of adhesives, etc., can solve the problems of unavoidable storage period of alcohol-based adhesives, influence, high hydroxyl content, etc., to achieve the effect of improving storage period, slowing down the viscosity peak, and easy production

Active Publication Date: 2009-10-28
深圳市百丽春粘胶实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the use of hydroxyl-terminated polydimethylsiloxane as the base polymer and the introduction of active silanes, the hydroxyl content in the system is relatively high, which inevitably affects the storage period of alcohol-based adhesives.

Method used

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  • Neutral silicone weather resistant glue formula and technique for preparing the same
  • Neutral silicone weather resistant glue formula and technique for preparing the same
  • Neutral silicone weather resistant glue formula and technique for preparing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Example 1: 100 parts of α, ω-dihydroxy polydimethylsiloxane (I) and 100 parts of light activated calcium carbonate were added to a vacuum kneader, the temperature was controlled at 120° C., and the vacuum degree was 0.098 MPa. Mix and dehydrate for 3 hours, then three-roll grinding to make base rubber; then move the base into a high-speed disperser, and mix 8 parts of methyltrimethoxysilane and 2 parts of γ-aminopropyltriethoxysilane at room temperature , 1 part of γ-(2,3-glycidoxy) propyltrimethoxysilane, 3 parts of titanium diisopropoxy diacetoacetate and dimethylmethoxysiloxy terminated poly Add 10 parts of dimethylsiloxane (V) into the high-speed disperser in batches, and stir with the gum base in vacuum. The vacuum degree is -0.098MPa, the rotation speed is 500rpm, and the stirring time is 60 minutes.

Embodiment 2

[0047]Example 2: 50 parts of α, ω-dihydroxypolydimethylsiloxane (I) and 50 parts of α, ω-methyldimethoxysiloxy-blocked polydimethylsiloxane (II) 100 parts as the base polymer, and 100 parts of light active calcium carbonate were added to the vacuum kneader, the temperature was controlled at 120 ° C, the vacuum degree was 0.098 MPa, blended and dehydrated for 3 hours to make base rubber, and then moved into a high-speed mixer; At room temperature, mix 5 parts of methyltrimethoxysilane, 2 parts of γ-aminopropyltriethoxysilane, 1 part of γ-(2,3-epoxypropoxy)propyltrimethoxysilane, Add 3 parts of titanium isopropoxy bisacetoacetate and 10 parts of dimethylmethoxysiloxy-terminated polydimethylsiloxane (V) into the high-speed dispersing machine in batches, and evacuate with the base glue Stir. The vacuum degree is -0.098MPa, the rotation speed is 500rpm, and the stirring time is 60 minutes.

Embodiment 3

[0048] Example 3: The method is the same as in Example 2, and the base polymer is α, ω-methyldimethoxysiloxy-terminated polydimethylsiloxane or (II) 50 parts, α, ω-trimethoxy 50 parts of siloxy-terminated polydimethylsiloxane (III).

[0049] The following is a comparison of the contamination, storage life and physical properties of Examples 1-3.

[0050] Table 1 Comparison of physical performance parameters

[0051]

[0052] Note 1: See Table 2 (Contamination Test Results) for specific test results.

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Abstract

The invention relates to a weather resistant glue, especially a neutral silicone weather resistant glue formula and a technique for preparing the same. The formula includes the following components: basic polymer, plasticizer, stuffing, cross linker, anchoring agent and catalyst, which are prepared as follow: basic polymer: 10-100 parts; plasticizer 1-50 parts; stuffing 1-150 parts; cross linker 0.5-10 parts; anchoring agent 0.5-10 parts; catalyst 0.001-15 parts. The neutral silicone weather resistant glue produced by the invention has the advantages of pollution-free, improved product storage time, adjusted modulus, reduced viscosity peak, easy production without tin catalyst or the like.

Description

Technical field: [0001] The invention relates to a weather-resistant adhesive, in particular to a neutral silicone weather-resistant adhesive formula and a preparation process thereof. Background technique: [0002] Silicone sealant has excellent resistance to ultraviolet rays and atmospheric aging, and can maintain excellent durability and wide temperature range for 30 years without cracking, brittleness, and deterioration in harsh environments such as sunlight, rain, snow, and seasonal climate changes. It has the characteristics of 50% displacement capacity and so on. With the prefabrication and high-rise construction of the construction industry, the high-grade interior and exterior decoration and decoration of buildings, and the large-scale adoption of large-scale frame structures, the performance requirements and dosage of building sealants are getting higher and higher. [0003] Common silicone building sealants are divided into acid type, oxime type and alcohol type....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J183/06C09J9/00
Inventor 潘自鼎许建明
Owner 深圳市百丽春粘胶实业有限公司
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