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Putty type silicone rubber composition and preparation method and application thereof

A silicone rubber composition, putty-type technology, applied in the field of polymer materials, can solve problems such as unfavorable application, catalyst poisoning, plasticizer carcinogenic risks, etc., achieve excellent mechanical strength, improve elongation at break and elasticity, and avoid material Hard and brittle and not resistant to acid and alkali

Active Publication Date: 2019-08-30
ZHEJIANG XINAN CHEM INDAL GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the prior art, the putty state of silicone rubber materials is generally obtained by adding plasticizers and a large amount of powder fillers. On the one hand, plasticizers have potential carcinogenicity. At present, there is a lack of scientific and reliable data to prove the safety of plasticizers. On the other hand, a large amount of powder filler will reduce the overall mechanical properties of silicone rubber materials, which is not conducive to later application
Moreover, the vulcanization mechanism of existing silicone rubber materials is platinum-catalyzed hydrosilylation, where platinum catalysts are sensitive to elements such as N, S, and P, and are prone to catalyst poisoning, which has an adverse effect on the vulcanization of silicone rubber materials.

Method used

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  • Putty type silicone rubber composition and preparation method and application thereof
  • Putty type silicone rubber composition and preparation method and application thereof
  • Putty type silicone rubber composition and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0101] This embodiment provides a kind of putty type silicone rubber composition, and its preparation raw material comprises the components as shown in Table 1:

[0102] Table 1

[0103]

[0104]

[0105] Among them, polysiloxane A is vinyl silicone oil, the mass percentage of vinyl chains is 2wt%, and the dynamic viscosity is 200CPS; polysiloxane B is vinyl raw rubber, and the mass percentage of vinyl chains is is 0.03wt%, and the number-average molecular weight is 700000g / mol; polysiloxane C is hydrogen-containing silicone oil, the mass percentage of hydrogen is 0.2wt%, and the dynamic viscosity is 20CPS; polysiloxane D is methyl silicone oil, dynamic The viscosity is 50CPS; the silica is fumed silica; the solid filler is 3000 mesh talcum powder; the structure control agent is polyhydroxy silicone oil; the catalyst is platinum catalyst. The mass ratio of the crosslinking component and the catalytic component is 1:1.

[0106] The preparation method includes the follow...

Embodiment 2

[0114] This embodiment provides a kind of putty type silicone rubber composition, and its preparation raw material comprises the components as shown in Table 2:

[0115] Table 2

[0116] raw material Cross-linking component Catalytic component Polysiloxane A 20 parts by weight 20 parts by weight Polysiloxane B 25 parts by weight 25 parts by weight Polysiloxane C 7.5 parts by weight 0 Polysiloxane D 0.5 parts by weight 0.5 parts by weight Silica 10 parts by weight 10 parts by weight solid filler 50 parts by weight 50 parts by weight structured control agent 1 part by weight 1 part by weight Auxiliary 0.1 parts by weight 0.1 parts by weight catalyst 0 0.05 parts by weight

[0117] Among them, polysiloxane A is vinyl silicone oil, the mass percentage of vinyl chain link is 1.1wt%, and the dynamic viscosity is 500CPS; Polysiloxane B is vinyl raw rubber, and the mass percentage of vinyl cha...

Embodiment 3

[0126] This embodiment provides a putty type silicone rubber composition, and its preparation raw materials include components as shown in Table 3:

[0127] table 3

[0128] raw material Cross-linking component Catalytic component Polysiloxane A 15 parts by weight 15 parts by weight Polysiloxane B 30 parts by weight 30 parts by weight Polysiloxane C 5 parts by weight 0 Silica 30 parts by weight 30 parts by weight structured control agent 7.5 parts by weight 7.5 parts by weight catalyst 0 0.1 parts by weight

[0129] Among them, polysiloxane A is vinyl silicone oil, the mass percentage of vinyl chain link is 1.1wt%, and the dynamic viscosity is 500CPS; Polysiloxane B is vinyl raw rubber, and the mass percentage of vinyl chain link is The content is 0.5wt%, the number-average molecular weight is 550000g / mol; the polysiloxane C is mercaptopropyl silicone oil, the mole percentage of mercapto chain link is 50%, an...

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Abstract

The invention provides a putty type silicone rubber composition and a preparation method and application thereof. The putty type silicone rubber composition comprises a crosslinking component and a catalytic component, wherein the crosslinking component comprises a polysiloxane A, a polysiloxane B, white carbon black and a solid filler, and the catalytic component comprises a polysiloxane A, a polysiloxane B, white carbon, a solid filler and a catalyst; and the polysiloxane A is a silicone oil, and the polysiloxane B is a silicone raw rubber. The putty type silicone rubber material is a two-component material, the operation time and curing time matched with the actual application can be obtained by changing the ratio of the crosslinking component and the catalytic component, the form of the putty and mechanical properties of the material are controlled by the synergistic cooperation of the silicone oil and the raw rubber, and the curing reaction is not limited to platinum-catalyzed hydrosilylation. The putty type silicone rubber composition is a novel silicone rubber material with high safety, good mechanical properties and strong applicability.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a putty type silicone rubber composition and its preparation method and application. Background technique [0002] Organosilicon materials have both the performance characteristics of organic materials and inorganic materials, and have excellent properties such as high stability, insulation, non-toxic, odorless and physiological inertness. They are one of the fastest-growing materials in new chemical materials. Widely used in medical, food, chemical, construction and other fields, known as "industrial seasoning". Silicone rubber plays an important role in silicone materials. Uncured silicone rubber is a linear polysiloxane with high molar mass, and cured silicone rubber is an elastomer with a cross-linked network structure; the main chain of silicone rubber is Si-O repeating unit, so it has good stability, corrosion resistance, aging resistance, physiologic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/07C08L83/05C08L83/04C08L83/06C08L83/08C08K7/26C08K3/34C08K3/36
CPCC08L83/04C08L2205/02C08L2205/025C08L2205/035C08L83/06C08K7/26C08K3/34C08K3/36C08L83/08
Inventor 卢杭徐旋陈丽云李露郭昱见陈凯旋
Owner ZHEJIANG XINAN CHEM INDAL GROUP
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