Epoxy-acryloyloxy primer for silicon rubber heat insulating layers and preparation method thereof

A technology of acryloxy base and thermal insulation layer, which is applied in the direction of adhesives, adhesive additives, non-polymer adhesive additives, etc., and can solve problems such as affecting interface bonding, cracking of primers, and lack of primers. Achieve the effect of improving the interface bonding strength, improving adhesion and ensuring integrity

Inactive Publication Date: 2015-06-03
SHANGHAI XINLI POWER EQUIP RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the epoxy base is used as the primer, improper coating will cause cracking of the primer after pre-curing, which will affect the interface bonding
In addition, improper selection of other components will cause "poisoning" of the butylated hydroxyl lining catalyst, resulting in incomplete interface curing, which is not conducive to further improvement of interface bonding strength
[0008] In summary, there is a lack of primers suitable for the bonding of silicone rubber / butadiene lining layers. Silicone rubber insulation materials are a new type of solid propellant insulation layer. Regarding the interface bonding performance of silicone rubber / butylene hydroxyl lining layers and There is no report on the compound primer of epoxy coupling agent and acryloxy coupling agent

Method used

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  • Epoxy-acryloyloxy primer for silicon rubber heat insulating layers and preparation method thereof
  • Epoxy-acryloyloxy primer for silicon rubber heat insulating layers and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] At room temperature, pre-polish the silicone rubber thermal insulation film (thickness: 2mm); put the film into a 4mm deep mold, pour 75g of butadiene rubber lining, spread evenly on the silicone rubber film; degas; finally Put it horizontally in a water-bath oven at 65°C, cure for 7 days, and make a silicone rubber / liner bonding test piece for testing. The results are listed in Table 2.

Embodiment 2

[0037] At room temperature, add 30g of epoxy-based coupling agent, 30g of crosslinking agent, and 10g of tackifier into a beaker containing 50g of diluent, and stir well after each addition. Then add 0.5g curing catalyst and stir evenly to make epoxy primer. Apply the primer evenly on the surface of the silicone rubber insulation layer, put it in a water bath oven at 65°C, and pre-cure for 1 hour. The silicone rubber / primer / liner adhesive test piece was made for testing, and the results are listed in Table 2.

Embodiment 3

[0039] Repeat the method of Experimental Example 2 according to the content of each component formulated in Table 1, but the amount of tackifier is 20g. The test results are listed in Table 2.

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Abstract

The invention relates to an epoxy-acryloyloxy primer for silicon rubber heat insulating layers and a preparation method thereof. The novel epoxy-acryloyloxy primer comprises a coupling agent, a crosslinking agent, a tackifier, a diluter and a curing catalyst, wherein the coupling agent is an epoxy silane coupling agent and / or an acryloyloxy silane coupling agent; the crosslinking agent is an organosilicon external crosslinking agent; the tackifier is a metal organic salt; the diluter is a siloxane capable of performing the dissolution and dilution functions of the solvent, and can be used for wiping and cleaning the silicon rubber surface; and the curing catalyst is a metal salt. The primer for solid propulsor silicon rubber heat insulating layer surface modification treatment can enhance the bonding performance of the interface between the butyl hydroxy lining layer and the silicon rubber heat insulating layer.

Description

[0001] technical field [0002] The invention relates to an epoxy-acryloyloxy primer, in particular to an epoxy-acryloyloxy primer for a solid rocket motor silicone rubber heat insulating layer and a preparation method thereof. More specifically, the present invention relates to a kind of with epoxy silane and acryloyl oxysilane as film-forming coupling agent, tetrabutyl orthosilicate as crosslinking agent, tetra-n-butyl titanate as tackifier, Triphenylbismuth (TPB) is a new primer for curing catalysts. Background technique [0003] As missile weapon systems have higher and higher requirements for the comprehensive performance of solid rocket motors, the silicone rubber insulation layer is expected to become a new generation of solid rocket motor insulation due to its advantages of good safety performance, low characteristic signal, ablation resistance, and erosion resistance. Layer materials have received widespread attention at home and abroad. However, due to its poor b...

Claims

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Application Information

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IPC IPC(8): C09J183/06C09J11/06C08G77/14C08G77/08
Inventor杨科朱小飞黄洪勇詹国柱贺建森楼阳
OwnerSHANGHAI XINLI POWER EQUIP RES INST