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Flame-retardant and fireproof sealant and preparation method thereof

A fireproof sealant and flame retardant technology, applied in adhesives, non-polymer adhesive additives, adhesive additives, etc., can solve the problems of lack of flame retardant and fireproof effects, increase of flame retardants, poor flame retardant effect, etc.

Active Publication Date: 2022-01-04
东莞市山力高分子材料科研有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it lacks flame retardant and fire prevention effects, and continues to improve
[0004] In order to improve the fire prevention effect of silicone sealants, adding flame retardants to silicone sealants is a common solution; , its flame retardant effect is not good; to improve the flame retardant effect, it is necessary to greatly increase the amount of flame retardant; but the result of increasing the amount of flame retardant is that the bonding performance of silicone sealant decreases

Method used

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  • Flame-retardant and fireproof sealant and preparation method thereof
  • Flame-retardant and fireproof sealant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The preparation of embodiment 1 flame retardant fireproof sealant

[0030] Composition in parts by weight of raw materials: 85 parts of polydimethylsiloxane; 8 parts of crosslinking agent; 1 part of catalyst; 3 parts of dispersant; 5 parts of plasticizer;

[0031] Described flame retardant is made up of zinc borate and magnesium carbonate that weight ratio is 4:1;

[0032] The preparation method of flame retardant and fireproof sealant: first put polydimethylsiloxane, dispersant and flame retardant into a high-speed mixer, and stir for 20 minutes under a vacuum of -0.06Mpa; then add a crosslinking agent and a catalyst, Stir for 150 minutes under a vacuum of -0.08Mpa to obtain the flame retardant and fireproof sealant.

Embodiment 2

[0033] The preparation of embodiment 2 flame retardant fireproof sealant

[0034] Composition in parts by weight of raw materials: 85 parts of polydimethylsiloxane; 8 parts of crosslinking agent; 1 part of catalyst; 3 parts of dispersant; 5 parts of plasticizer;

[0035] The flame retardant is a modified flame retardant, and the modified flame retardant is prepared by the following method: zinc borate and magnesium carbonate (the weight ratio of zinc borate and magnesium carbonate is 4:1) are dispersed in the volume Add N-(2-aminoethyl)-3-aminopropyltrimethoxysilane and sodium lignosulfonate to an aqueous ethanol solution with a fraction of 50% and stir evenly; then grind at a temperature of 50° C. for 8 hours; After the grinding is finished, the grinding slurry is dried to obtain the modified flame retardant; wherein, the total weight of zinc borate and magnesium carbonate and ethanol aqueous solution and N-(2-aminoethyl)-3-aminopropyltrimethyl The dosage ratio of oxysilane ...

experiment example 1

[0063] The flame-retardant and fire-proof sealants prepared in Examples 1 and 2 and Comparative Examples 1 to 5 were made into a sample strip with a length of 100mm, a width of 6mm, and a thickness of 3mm; refer to GB / T 2406.2-2009 to test the flame-retardant and fire-proof sealant sample in The minimum oxygen concentration (oxygen index) required to maintain balanced combustion in the oxygen-nitrogen mixed flow; the higher the oxygen index, the better the fire and flame retardant effect; the test results are shown in Table 1.

[0064] Table 1. Fireproof effect test of flame retardant and fireproof sealant

[0065]

[0066]

[0067] As can be seen from the test data in Table 1, the flame retardant and fireproof effect of the flame retardant and fireproof sealant of embodiment 1 is obviously better than that of comparative examples 1 and 2, which shows that the preparation of flame retardant and fireproof sealant with polydimethylsiloxane is a raw material. Glue, adding a...

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Abstract

The invention relates to the technical field of sealant preparation, and particularly discloses a flame-retardant and fireproof sealant and a preparation method thereof. The flame-retardant and fireproof sealant is prepared from the following raw material components in parts by weight: 80-100 parts of polydimethylsiloxane; 5-10 parts of a cross-linking agent; 0.5-2 parts of a catalyst; 3-6 parts of a dispersant; 1-10 parts of a plasticizer; and 1-5 parts of a flame retardant. The flame retardant is composed of zinc borate and anhydrous magnesium carbonate. Research shows that in the process of preparing the flame-retardant and fireproof sealant by taking polydimethylsiloxane as a raw material, the flame retardant composed of zinc borate and anhydrous magnesium carbonate is added, and a certain fireproof and flame-retardant effect can be achieved under the condition that only a small amount of flame retardant is added.

Description

technical field [0001] The invention relates to the technical field of sealant preparation, in particular to a flame-retardant and fireproof sealant and a preparation method thereof. Background technique [0002] Sealant is an adhesive used to fill the configuration gap to play a sealing role. It needs to be deformed with the shape of the sealing surface, not easy to flow, and has a certain degree of cohesion; it can prevent leakage, waterproof, vibration and sound insulation, etc. At least one or more effects. [0003] Silicone sealant is a paste made of polydimethylsiloxane as the main raw material, supplemented with crosslinking agent, filler, plasticizer, coupling agent and catalyst in a vacuum state. Chinese invention patent 201110223644.3 discloses an acidic silicone sealant, which uses α-ω-dihydroxy-terminated polysiloxane: 50-80 parts, cross-linking agent: 2-10 parts, filler: 2-15 parts, Catalyst: 0.1-0.2 parts, plasticizer: 1-20 parts, adhesion promoter: 0-5 parts...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J183/04C09J11/04
CPCC09J183/04C09J11/04C08K2003/387C08K2003/267C08K3/38C08K3/26C08K9/06C08K9/08
Inventor 罗伟雄
Owner 东莞市山力高分子材料科研有限公司
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