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Organic silicon polyurea base polymer, elastic body prepared by the same, preparation method and application thereof

A basic polymer, silicone technology, applied in the field of elastomers, self-crosslinking silicone polyurea base polymers, can solve problems such as limiting crosslinking ability

Inactive Publication Date: 2012-02-01
HENKEL KGAA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these studies obtained block polymers with only end groups retaining crosslinking groups, which limits their ability to crosslink in forming polymer structures.

Method used

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  • Organic silicon polyurea base polymer, elastic body prepared by the same, preparation method and application thereof
  • Organic silicon polyurea base polymer, elastic body prepared by the same, preparation method and application thereof
  • Organic silicon polyurea base polymer, elastic body prepared by the same, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0098] In a stirred container, 200 g of aminopropyldimethyl-terminated polydimethylsiloxane (Mw=1000; 0.4 mol amino group, GELEST Company) was dissolved in 1 L of solvent (toluene:THF=1:1, volume ratio), add 66.6g isophorone diisocyanate IPDI (0.6molNCO), react at 40°C for 2 hours; then add 26.4g aminoethylaminopropyl triethoxysilane (0.2moles amino, TM-552, China Wuhan Tianmu Technology Co., Ltd., No. 96, Zhuodaoquan South Road, Hongshan District, Wuhan City), continued the reaction at 40°C for 4 hours. The reaction was carried out at 1.01 atmospheres under nitrogen protection. Finally, a solution sol of the silicone polyurea base polymer with a molar ratio of component A:B:C=3:2:1 is prepared, poured out to form a film, and cured at room temperature to form an elastomer material. The weight-average molecular weight of the base polymer before crosslinking is 100,000, the elongation at break of the elastomer material is 200%, the Young's modulus is 44.3MPa, it begins to decom...

Embodiment 2

[0100] In a dual extrusion gun (Loctite from Henkel Dual Cartridge ManualApplicators, 983438 type, extrusion gun A: B ratio is 10: 1 (volume ratio), in A, add 300.0g aminopropyl dimethyl end-capped polymethylphenylsiloxane (Mw=3000, 0.2 mol amino, the preparation method is according to the reference: James E.McGrath, Debra L.Dunson, Sue J.Mechaml, James L.Hedrick, Advances in Polymer Science, Vol.140, 1999, 62-99), add 33.6g to B Cyclohexanediisocyanate (0.4molNCO,), and 19.6g aminoethylaminopropyl methyl dimethoxysilane (TM-602, 0.2mol amino, Chinese Wuhan Tianmu Technology Company), and catalyst 0.005g stannous octoate ( Shanghai Qidi Chemical Co., Ltd., No. 2299, Zhongshan North Road, Shanghai), the front-end mixer of the extrusion gun is static mix nozzles Part No.983443 (model) with a diameter of 8mm. The elastomer of silicone polyurea elastomer having a molar ratio of component A:B:C=2:1:1 was obtained by extrusion at normal temperature for 15 seconds. The elongation...

Embodiment 3

[0102] In a stirred vessel, 475 g of aminopropyldimethyl-terminated polydimethylsiloxane (Mw=5000; 0.19 moles amino group, the reference for the preparation method is the same as in Example 2) was dissolved in 1 L of solvent (DMF: THF =1:2, volume ratio), add 25g p-diphenylmethane diisocyanate MDI (0.20moles NCO,) and react at 50°C for 1 hour, then add 1.11g aminoethylaminopropylmethyldimethoxysilane (0.01 Moles amino group, primary amino group plus secondary amino group, TM551, Wuhan Tianmu Technology Co., Ltd., China) continued to react at 50° C. for 4 hours. The reaction was carried out under the protection of nitrogen at 1.05 atmospheres. Finally, a solution sol of the silicone polyurea base polymer with a molar ratio of component A:B:C=20:19:1 was prepared, poured out to form a film, cured at room temperature and cross-linked to form an elastomer material. The weight-average molecular weight of the basic polymer before crosslinking is 80,000. The elongation at break of t...

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Abstract

The invention discloses a basic polymer of self-crosslinking organosilicon polyurea and making method and application, which is characterized by the following: adopting amino polysiloxane, polyisocyanates and silicane of polyamino with active group as raw material; copolymerizing the product under indoor temperature; crosslinking terminal group of molecular chain and alkoxy of lateral chain; forming the intramolecular and intermolecular crosslinking net structure; fitting for manufacturing the binding agent, sealing gel, coating and anti-buffer layer.

Description

technical field [0001] The present invention relates to self-crosslinking organosilicon polyurea basic polymer, the elastomer prepared by it, its preparation method and its application, the elastomer prepared thus can be widely used in adhesive, sealant, gasket, anti-bumper Coatings and coatings, especially sealants in the automotive industry. Background technique [0002] With the continuous development of the modern automobile industry, the requirements for high-performance functional materials have become more and more stringent. For example, the sealants used for parts such as automobile oil pipelines and engine covers not only require good sealing performance, but also must be temperature-resistant, solvent-resistant, stretchable and curable at room temperature. As countries pay more and more attention to environmental protection, the requirements for the volatilization of organic solvents of such materials as sealants are becoming increasingly stringent and complex, b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G77/452C08G71/02C09K3/10C09D183/10C09D175/02C09J175/02C09J183/10
Inventor 贾叙东袭锴葛仁杰余学海
Owner HENKEL KGAA