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Polysiloxane dihydric alcohol, thermoplastic organic silicon polyurethane elastomer, cross-linked polyurethane elastomer and application of polysiloxane dihydric alcohol, thermoplastic organic silicon polyurethane elastomer and cross-linked polyurethane elastomer

A polyurethane elastomer and polysiloxane technology, applied in the field of polyol and elastomer materials, can solve the problems of cumbersome and complicated process, many steps, and difficult implementation, and achieve simple equipment and process, low cost, and good comprehensive performance Effect

Active Publication Date: 2022-07-29
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the preparation methods of these patents require many steps, the process is cumbersome and complicated, and the implementation is difficult.
[0006] Patent CN109517131A selects organosilicon diol as one of the raw materials to prepare a thermoplastic organosilicon polyurethane. Functional groups that continue to react, so the thermoplastic silicone polyurethane cannot continue to react to make a cross-linked silicone polyurethane elastomer

Method used

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  • Polysiloxane dihydric alcohol, thermoplastic organic silicon polyurethane elastomer, cross-linked polyurethane elastomer and application of polysiloxane dihydric alcohol, thermoplastic organic silicon polyurethane elastomer and cross-linked polyurethane elastomer
  • Polysiloxane dihydric alcohol, thermoplastic organic silicon polyurethane elastomer, cross-linked polyurethane elastomer and application of polysiloxane dihydric alcohol, thermoplastic organic silicon polyurethane elastomer and cross-linked polyurethane elastomer
  • Polysiloxane dihydric alcohol, thermoplastic organic silicon polyurethane elastomer, cross-linked polyurethane elastomer and application of polysiloxane dihydric alcohol, thermoplastic organic silicon polyurethane elastomer and cross-linked polyurethane elastomer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034]Raw materials for preparing thermoplastic organosilicon polyurethane elastomer, calculated on a total weight of 100 parts, including:

[0035] 1) diisocyanate: diphenylmethane diisocyanate, 35 parts;

[0036] 2) polysiloxane diol: 10 parts, its preparation method comprises the following steps:

[0037] Step I: 80 parts by weight of 2,4,6,8-tetramethylcyclotetrasiloxane (CAS NO. 2370-88-9), 20 parts by weight of end-capping agent deionized water, 40 parts by weight of Isopropanol solvent and 0.2 parts by weight of catalyst NaOH were added to the reaction kettle, and the temperature was raised to 70 ° C, and the reaction was carried out for 2 hours. After sampling and measuring the hydroxyl value of 133 mgKOH / g, phosphoric acid was added to neutralize the system until the system was neutral. - Extract the solvent under the condition of 0.1MPa to obtain the hydrogen-containing silicone oil end-capped with silanols;

[0038] Step II: add 0.8 mole parts of 3-mercaptopropylm...

Embodiment 2

[0081] Raw materials for preparing thermoplastic organosilicon polyurethane elastomer, calculated on a total weight of 100 parts, including:

[0082] 1) diisocyanate: hexamethylene diisocyanate, 45 parts;

[0083] 2) polysiloxane diol: 5 parts, and its preparation method comprises the following steps:

[0084] Step I: 90 parts by weight of 2,4,6,8-tetramethylcyclotetrasiloxane (CAS NO. 2370-88-9), 10 parts by weight of end-capping agent deionized water, 20 parts by weight of Isopropanol solvent and 0.4 parts by weight of catalyst NaOH were added to the reactor, the temperature was raised to 60°C, and the reaction was carried out for 3 hours. After sampling and measuring the hydroxyl value of 187 mgKOH / g, phosphoric acid was added to neutralize the system until the system was neutral. - Extract the solvent under the condition of 0.1MPa to obtain the hydrogen-containing silicone oil end-capped with silanols;

[0085] Step II: add 0.6 mole part of 3-mercaptopropyl methyldimetho...

Embodiment 3

[0094] Raw materials for preparing thermoplastic organosilicon polyurethane elastomer, calculated on a total weight of 100 parts, including:

[0095] 1) Diisocyanate: 1,4-cyclohexane diisocyanate, 25 parts;

[0096] 2) polysiloxane diol: 2 parts, and its preparation method comprises the following steps:

[0097] Step I: 70 parts by weight of 2,4,6,8-tetramethylcyclotetrasiloxane (CAS NO. 2370-88-9), 30 parts by weight of end-capping agent deionized water, 30 parts by weight of Isopropanol solvent and 0.5 weight part of catalyst NaOH were added to the reaction kettle, and the temperature was raised to 80°C, and the reaction was carried out for 1 hour. After sampling and measuring the hydroxyl value of 311 mgKOH / g, phosphoric acid was added to neutralize the system until the system was neutral. - Extract the solvent under the condition of 0.1MPa to obtain the hydrogen-containing silicone oil end-capped with silanols;

[0098] Step II: add 0.5 mole part of 3-mercaptopropyl meth...

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Abstract

The invention discloses polysiloxane dihydric alcohol, a thermoplastic organic silicon polyurethane elastomer, a cross-linked polyurethane elastomer and application of the polysiloxane dihydric alcohol, the thermoplastic organic silicon polyurethane elastomer and the cross-linked polyurethane elastomer. The structural formula of the polysiloxane dihydric alcohol is as follows: the polysiloxane dihydric alcohol is adopted to prepare a thermoplastic organic silicon polyurethane elastomer, and then thermal oxidation treatment is performed to prepare the cross-linked polyurethane elastomer. The cross-linked polyurethane elastomer material has better comprehensive performance, especially has obvious advantages in the aspects of mechanical property, chemical resistance, oxidation resistance, creep resistance and the like, and can be applied to the field with harsh environmental conditions.

Description

technical field [0001] The invention relates to the fields of polyols and elastomer materials, in particular to a polysiloxane diol, a thermoplastic organosilicon polyurethane elastomer, a cross-linked polyurethane elastomer and uses thereof. Background technique [0002] Thermoplastic polyurethane elastomer (TPU) is a comprehensive material composed of thermodynamically incompatible soft segments and hard segments with excellent properties such as high strength, high toughness, and high elasticity. TPU can be processed by a variety of melt processing methods, such as Injection molding and extrusion, etc., can be prepared into a variety of products such as pipes, films, complex molded bodies, etc., which can be widely used in various industries. [0003] For TPU products such as seals, gaskets, wires and cables in industrial use, because these products are often exposed to environmental conditions such as chemicals, solvents, and high temperatures, their chemical resistance,...

Claims

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Application Information

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IPC IPC(8): C08G77/28C08G18/61C08L75/04
CPCC08G77/28C08G18/61C08L75/04
Inventor 周明杨杰黄岐善
Owner WANHUA CHEM GRP CO LTD
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