Dimethyl silicone polymer-polyamide multi-block elastomer and production method thereof

The technology of polydimethylsiloxane and dimethylsiloxane is applied in the field of polydimethylsiloxane-polyamide multi-block elastomer and its preparation method, and can solve the problem of high cost and complicated preparation process , low performance and other problems, to achieve the effect of good high temperature resistance, simple preparation method and good mechanical properties

Inactive Publication Date: 2009-03-25
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The above two patent application technologies have the following disadvantages: the Chinese patent CN1563182A obtains elastomers through mechanical blending, which has the disadvantages of uneven mixing, low performance and complicated preparation process; the preparation process of the Chinese patent CN1717434A uses toxic organic solvents and expensive catalyst, so the cost is higher and the molecular weight of the obtained siloxane-based polyamide thermoplastic elastomer is low, etc.

Method used

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  • Dimethyl silicone polymer-polyamide multi-block elastomer and production method thereof
  • Dimethyl silicone polymer-polyamide multi-block elastomer and production method thereof
  • Dimethyl silicone polymer-polyamide multi-block elastomer and production method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0026] In a reactor equipped with a stirrer, a reflux condenser and a nitrogen pipe, add 525 g of octamethylcyclotetrasiloxane, and remove the air and moisture in the system with a small amount of nitrogen flow. Then, add 0.105g of tetramethylammonium hydroxide and 62g of bisaminopropyltetramethyldisiloxane, pass in nitrogen protection, stir and react at 90°C for 20h, pass in a small amount of nitrogen, and heat up to 150°C to decompose and break the ring Catalyst 0.5h. Then remove low boilers at 140° C. and 0.07 KPa to obtain amino-terminated silicone oil with a molecular weight of 2000 g / mol. 500g amino-terminated silicone oil, 224.6g hexamethylenediamine and 258g succinic acid are added to water and ethanol (V 水 :V 乙醇 = 1: 1) in the mixed solvent, the concentration of the solution is 50%, the water bath is heated to 60 ℃ and stirred, the reaction is two hours and the pH value of the salt solution is adjusted to 7.0, the salt solution is added in the polymerization kettle,...

Embodiment 2

[0028] In a reactor equipped with a stirrer, a reflux condenser and a nitrogen pipe, add 525 g of octamethylcyclotetrasiloxane, and remove the air and moisture in the system with a small amount of nitrogen flow. Then, add 0.105g of tetramethylammonium hydroxide and 35g of bisaminopropyltetramethyldisiloxane, pass in nitrogen protection, stir and react at 90°C for 20h, pass in a small amount of nitrogen, and heat up to 150°C to decompose and break the ring Catalyst 0.5h. Then remove the low boilers at 140° C. and 0.07 KPa to obtain amino-terminated silicone oil with a molecular weight of 5000 g / mol. 500g amino-terminated silicone oil, 242g hexamethylenediamine and 258g succinic acid are added to water and ethanol (V 水 :V 乙醇 = 1: 1) in the mixed solvent, the concentration of the solution is 50%, the water bath is heated to 60 ℃ and stirred, the reaction is two hours and the pH value of the salt solution is adjusted to 7.0, the salt solution is added in the polymerization kettl...

Embodiment 3

[0030] In a reactor equipped with a stirrer, a reflux condenser and a nitrogen pipe, add 525 g of octamethylcyclotetrasiloxane, and remove the air and moisture in the system with a small amount of nitrogen flow. Then, add 0.105g of tetramethylammonium hydroxide and 62g of bisaminopropyltetramethyldisiloxane, pass in nitrogen protection, stir and react at 95°C for 20h, pass in a small amount of nitrogen, and heat up to 150°C to decompose and break the ring Catalyst 0.5h. Then remove low boilers at 140° C. and 0.07 KPa to obtain amino-terminated silicone oil with a molecular weight of 2000 g / mol. 500g amino-terminated silicone oil, 144.6g hexamethylenediamine and 303g sebacic acid are added to water and ethanol (V 水 :V 乙醇 =1:1) in the mixed solvent, the concentration of the solution is 50%, heated to 60°C in a water bath and stirred, reacted for two hours and adjusted the pH value of the salt solution to 7.1, added the salt solution into the polymerization kettle, slowly Rais...

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Abstract

The invention discloses a polydimethylsiloxane-polyamide multi-block elastomer and a preparation method thereof. Under the action of a catalyzer and an end capping agent, methyl siloxane is treated with ring-opening polymerization to obtain polydimethylsiloxane end-capped by bis-amido and then solution salifying and condensation polymerization at high temperature are carried out to the polydimethylsiloxane end-capped by bis-amido, diamines, dibasic acid and the like to synthesize a polydimethylsiloxane-polyamide multi-block thermoplastic elastomer which has high tensile strength, high impact resistance strength at low temperature, good pliability, high elastic recovery rate as well as excellent abrasive resistance and flexibility, can replace ordinary rubber and flexible plastics and can be widely applied to functional components of mechanical and electrical precision instruments, automobile components, sport goods, hoses and machine belts, and the like.

Description

technical field [0001] The invention relates to a polysiloxane-polyamide multi-block thermoplastic elastomer and a preparation method thereof, in particular to a polydimethylsiloxane-polyamide multi-block elastomer and a preparation method thereof. Background technique [0002] Compared with thermoplastic elastomers such as SBC (styrene), TPO (polyolefin), TPVC (PVC), TPU (PU) and TPEE (polyester), polyamide-based thermoplastic elastomer (TPAE) is the most A new type of thermoplastic elastomer developed late, was first successfully developed and commercialized by Huls Company in Shande in 1979. Later, the American Upjohn Company, the French ATO Chemical Company, the Swiss Emser Company, the Japanese Wood Amide Company, and the Japanese Wood Ink Company successively produced various brands of TPAE products. TPAE has the characteristics of toughness, wear resistance, fatigue resistance, weather resistance, cold resistance, heat resistance, chemical resistance, sound absorptio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G77/455
Inventor 章永化王文志胡长存邱廷模黄华鹏
Owner SOUTH CHINA UNIV OF TECH
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