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Low-temperature curing adhesive for forming medicine-carrying winding composite shell and preparation method

A shell forming and adhesive technology, applied in the direction of adhesive, adhesive type, adhesive additive, etc. The connection performance, the preparation process are convenient, and the effect of meeting the requirements of use

Inactive Publication Date: 2021-01-05
SHANGHAI AEROSPACE CHEM ENG INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the saturated chain structure, extremely low degree of unsaturation and non-polar characteristics of EPDM rubber, and the thermal insulation layer has been vulcanized before the winding of the drug, the solid material prepared by the thermal insulation layer and the resin-based composite material during the winding of the drug is Bonding between rocket motor case, insulation layer and insulation layer becomes very difficult

Method used

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  • Low-temperature curing adhesive for forming medicine-carrying winding composite shell and preparation method
  • Low-temperature curing adhesive for forming medicine-carrying winding composite shell and preparation method
  • Low-temperature curing adhesive for forming medicine-carrying winding composite shell and preparation method

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preparation example Construction

[0056] According to the second aspect of the present invention, there is provided a method for preparing a low-temperature curing adhesive for forming a wound composite shell with medicine, which is used to prepare the low-temperature curing adhesive for forming a wound composite shell with medicine described in the first aspect, including:

[0057] The curing catalyst and the plasticizer are prepared into a solution according to the mass ratio;

[0058] Mix the coupling agent, reinforcing filler and tackifying resin according to the mass ratio;

[0059] At room temperature, add the composition of adhesive, chain extender, crosslinking agent, curing catalyst and plasticizer solution, reinforcing filler, coupling agent and tackifying resin into the mixing container according to the mass ratio, and Stir well after each addition;

[0060] Stir evenly after adding the curing agent, vacuum degassing, preferably degassing for 10 to 20 minutes, to prepare a low-temperature curing ad...

Embodiment 1

[0069] At room temperature, 100g of hydroxyl-terminated polybutadiene, 5g of epoxy resin E51, 2.5g of N,N'-bis(2-hydroxypropyl)aniline, 0.5g of trimethylolpropane, 8.02g of triphenyl Bismuth dioctyl sebacate solution, (0.5g coupling agent, 10g white carbon black and 2g boron phenolic resin) composition was added into the mixing container, and fully stirred evenly after each addition. Stir and disperse for 10 minutes, then bake at 60°C for 10 minutes. Then add an IPDI curing agent with a curing parameter R=1.08 at room temperature, stir evenly and then vacuum degas for 15 minutes to obtain a low-temperature curing adhesive. The adhesive of the present invention was used to make shear samples of the thermal insulation layer and the thermal insulation layer, and the thermal insulation layer and the shell material resin sheet, and cured at 70° C. for 5 days. The measured shear strength results are listed in Table 2.

Embodiment 2

[0071] Repeat the method of Example 1 according to the content of each component specified in Table 1, but replace triphenylbismuth with dibutyltin dilaurate, polyoxazine resin replaces boron phenolic resin, TDI replaces IPDI, wherein N, N'- The consumption of bis(2-hydroxypropyl)aniline is 3g, the consumption of trimethylolpropane is 1.0g, the consumption of dibutyltin dilaurate is 0.005g, the consumption of dioctyl sebacate is 10g, white carbon black 5g, the amount of polyoxazine resin is 2g, and the TDI curing parameter R is 1.08. The test results are listed in Table 2.

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Abstract

The invention provides a low-temperature curing adhesive for forming a medicine-carrying winding composite shell and a preparation method. The low-temperature curing adhesive comprises an adhesive, achain extender, a cross-linking agent, a reinforcing filler, a coupling agent, tackifying resin, a plasticizer, a curing catalyst and a curing agent. The curing catalyst and the plasticizer are prepared into a solution; the coupling agent, the reinforcing filler and the tackifying resin are mixed; the adhesive, the chain extender, the cross-linking agent, the solution of the curing catalyst and the plasticizer, the reinforcing filler, the coupling agent and the tackifying resin are uniformly stirred; and the curing agent is added, uniformly stirred and vacuum degassing is performed so as to obtain the adhesive. The adhesive disclosed by the invention can realize low-temperature curing, is convenient in preparation process and easy to construct, has good adhesion performance between heat insulation layers and between the heat insulation layer and a shell composite material, has the shear strength of more than 2MPa, and can meet the use requirements of an engine with a drug-wound composite shell.

Description

technical field [0001] The invention belongs to the technical field of adhesive materials, and in particular relates to a low-temperature curing adhesive for forming a medicine-carrying wound composite shell and a preparation method thereof. Background technique [0002] With the continuous emergence and rapid development of new high-performance composite materials, the solid rocket motor casing made of filament wound composite materials has become one of the important symbols for evaluating the performance level of solid rocket motors. In the manufacturing process of solid rocket motors with composite shells, the new process of winding with charge column is compared with the process of first winding the shell and then pouring the powder, which saves the necessary mandrel tooling and mandrel making in the traditional process, and the process is relatively simple. At the same time, the powder column and other components of the new process are individually formed, and the prob...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/14C09J11/04C09J11/08C09J11/06C08G18/69C08G18/65C08G18/58C08G18/32
CPCC09J175/14C09J11/04C09J11/08C09J11/06C08G18/698C08G18/6594C08G18/58C08G18/3275C08G18/3206C08L61/14C08L61/34C08K7/24C08K5/11C08K3/04C08K5/544
Inventor 沈兆宏王旭波翟杰明温彦威贺建森吴战武詹国柱黄洪勇
Owner SHANGHAI AEROSPACE CHEM ENG INST
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