Multifunctional ablation-resistant adhesive for thermal protection and method for preparing same

Abstract

The present invention discloses one kind multifunctional protecting ablation resisting adhesive. The adhesive consists of polysiloxane 50-130 (in weight portions, the same below), polysiloxane-II 50-70, epoxy resin 0-10, No. 105 resin 0-5, white carbon black 10-20, carbon powder 5-15, chromium oxide 2-8, zinc oxide 3-10, adhesion promoter 1-3, stabilizer 0-5, crosslinking agent 2-5, and catalyst 0.5-3. The adhesive of the present invention has small density, low ablation rate, excellent adhesion to several kinds of matrix, simple preparation process, low cost and other advantages.

Description

technical field

[0001] The invention relates to an adhesive and a preparation method thereof, in particular to an ablation-resistant adhesive for multifunctional heat protection and a preparation method thereof, belonging to the technical field of special advanced materials for heat protection. Background technique

[0002] With the rapid development and progress of science and technology, higher and more stringent requirements are constantly put forward for thermal protection materials. Ablation-resistant materials can effectively protect various substrates from erosion under harsh conditions such as high temperature, high pressure, and high-speed scour airflow, and thus are increasingly widely used.

[0003] Ablation-resistant materials should have the following properties: (1) large specific heat - can absorb a large amount of heat; (2) small thermal conductivity - difficult to transfer heat to the inside; (3) high melting point; (4) has Viscous, forms a carbonized layer...

Examples

Embodiment 1

[0056] The raw material components of the ablation-resistant adhesive for multifunctional thermal protection of the present invention are as follows, all in parts by weight:

[0057] Polysiloxane I 50

[0058] Polysiloxane II 50

[0059] 105 resin 5

[0060] Silica 15

[0061] Toner 8

[0062] Chromium trioxide 3

[0063] Zinc oxide 3

[0064] γ-Glycidoxypropyltrimethoxysilane 1

[0065] Hexamethyldisilazane 1.5

[0066] Orthoethyl silicate 2

[0067] Stannous octoate 1.4

[0068] Refer to the literature (Feng Shengyu, Zhang Jie, Li Meijiang, Zhu Qing addendum, organosilicon polymer and its application, Chemical Industry Press, 2004, Chapter 3) to introduce the method to prepare polysiloxane I or II. For example: Add octamethylcyclotetrasiloxane, various modified cyclosiloxanes, catalysts, etc. in proportion 2 In the reaction flask of conduit and reflux device, under N 2 Under protection, slowly heat to 80-90° C., stir and keep warm for 1-2 hours, then add end-cappi...

Embodiment 2

[0075] The raw material components are as follows, all in parts by weight:

[0076] Polysiloxane I 40

[0077] Polysiloxane II 60

[0078] 105 resin 4.5

[0079] Silica 20

[0080] Toner 8

[0081] Chromium trioxide 3

[0082] Zinc oxide 3

[0083] γ-Glycidoxypropyltrimethoxysilane 1

[0084] Hexamethyldisilazane 1.5

[0085] Orthoethyl silicate 2

[0086] Stannous octoate 1.4

[0087] Referring to the preparation method of Example 1, the ablation-resistant adhesive for multifunctional thermal protection was obtained. Its properties are: ablation rate 0.170mm / s; tensile strength 3.59MPa; density 1.19g / cm 3 ; Bonding and peeling strength of steel is 3.46MPa.

Embodiment 3

[0089] The raw material components are as follows, all in parts by weight:

[0090] Polysiloxane I 45

[0091] Polysiloxane II 55

[0092] 105 resin 4.3

[0093] Silica 18

[0094] Toner 10

[0095] Chromium trioxide 3

[0096] Zinc oxide 3

[0097] γ-Glycidoxypropyltrimethoxysilane 1

[0098] Hexamethyldisilazane 1.5

[0099] Orthoethyl silicate 2

[0100] Stannous octoate 1.4

[0101] Referring to the preparation method of Example 1, the ablation-resistant adhesive for multifunctional thermal protection was obtained. Its properties are: ablation rate 0.176mm / s; tensile strength 3.45MPa; density 1.18g / cm 3 ; Bonding and peeling strength of steel is 3.25MPa.

technical field

[0001] The invention relates to an adhesive and a preparation method thereof, in particular to an ablation-resistant adhesive for multifunctional heat protection and a preparation method thereof, belonging to the technical field of special advanced materials for heat protection. Background technique

[0002] With the rapid development and progress of science and technology, higher and more stringent requirements are constantly put forward for thermal protection materials. Ablation-resistant materials can effectively protect various substrates from erosion under harsh conditions such as high temperature, high pressure, and high-speed scour airflow, and thus are increasingly widely used.

[0003] Ablation-resistant materials should have the following properties: (1) large specific heat - can absorb a large amount of heat; (2) small thermal conductivity - difficult to transfer heat to the inside; (3) high melting point; (4) has Viscous, forms a carbonized layer...

Examples

Embodiment 1

[0056] The raw material components of the ablation-resistant adhesive for multifunctional thermal protection of the present invention are as follows, all in parts by weight:

[0057] Polysiloxane I 50

[0058] Polysiloxane II 50

[0059] 105 resin 5

[0060] Silica 15

[0061] Toner 8

[0062] Chromium trioxide 3

[0063] Zinc oxide 3

[0064] γ-Glycidoxypropyltrimethoxysilane 1

[0065] Hexamethyldisilazane 1.5

[0066] Orthoethyl silicate 2

[0067] Stannous octoate 1.4

[0068] Refer to the literature (Feng Shengyu, Zhang Jie, Li Meijiang, Zhu Qing addendum, organosilicon polymer and its application, Chemical Industry Press, 2004, Chapter 3) to introduce the method to prepare polysiloxane I or II. For example: Add octamethylcyclotetrasiloxane, various modified cyclosiloxanes, catalysts, etc. in proportion 2 In the reaction flask of conduit and reflux device, under N 2 Under protection, slowly heat to 80-90° C., stir and keep warm for 1-2 hours, then add end-cappi...

Embodiment 2

[0075] The raw material components are as follows, all in parts by weight:

[0076] Polysiloxane I 40

[0077] Polysiloxane II 60

[0078] 105 resin 4.5

[0079] Silica 20

[0080] Toner 8

[0081] Chromium trioxide 3

[0082] Zinc oxide 3

[0083] γ-Glycidoxypropyltrimethoxysilane 1

[0084] Hexamethyldisilazane 1.5

[0085] Orthoethyl silicate 2

[0086] Stannous octoate 1.4

[0087] Referring to the preparation method of Example 1, the ablation-resistant adhesive for multifunctional thermal protection was obtained. Its properties are: ablation rate 0.170mm / s; tensile strength 3.59MPa; density 1.19g / cm 3 ; Bonding and peeling strength of steel is 3.46MPa.

Embodiment 3

[0089] The raw material components are as follows, all in parts by weight:

[0090] Polysiloxane I 45

[0091] Polysiloxane II 55

[0092] 105 resin 4.3

[0093] Silica 18

[0094] Toner 10

[0095] Chromium trioxide 3

[0096] Zinc oxide 3

[0097] γ-Glycidoxypropyltrimethoxysilane 1

[0098] Hexamethyldisilazane 1.5

[0099] Orthoethyl silicate 2

[0100] Stannous octoate 1.4

[0101] Referring to the preparation method of Example 1, the ablation-resistant adhesive for multifunctional thermal protection was obtained. Its properties are: ablation rate 0.176mm / s; tensile strength 3.45MPa; density 1.18g / cm 3 ; Bonding and peeling strength of steel is 3.25MPa.

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