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Elastomer, method for preparation thereof, and use thereof

An elastomer and thermoplastic elastomer technology, applied in the field of polyurethane, its preparation, can solve the problems of delaying the commercialization of materials, and achieve the effects of low instrument cost, less by-products, and high yield

Active Publication Date: 2019-12-03
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Similar to polyisobutylene urethane, technical challenges remain in the synthesis process of polyethylene urethane, which continues to delay the commercialization of the material

Method used

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  • Elastomer, method for preparation thereof, and use thereof
  • Elastomer, method for preparation thereof, and use thereof
  • Elastomer, method for preparation thereof, and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0082] Embodiment 1: Preparation of hydrogenated diols

[0083] Add 50g polybutadiene diol and 600mL THF to the hydrogenation kettle; after the polybutadiene diol is dissolved, add 12g of Pt hydrogenation catalyst and hydrogen to the hydrogenation kettle; control the temperature at 60°C and control the pressure At 2 MPa, the reaction was continued for 20 hours until the reaction was complete; the hydrogenated diol obtained was isolated, purified and dried.

Embodiment 2

[0085] process:

[0086] Into a 100 mL glass reactor was added 30 mL of toluene and 3.7 g of hydrogenated polybutadiene diol (H-HTPB). The mixture was stirred until H-HTPB was dissolved in toluene. Then 1.5 g of 4,4'-diphenylmethane diisocyanate was added, followed by 40 μL of dibutyltin dilaurate catalyst. The reaction mixture was then heated using microwave irradiation (400W) to maintain its temperature at 65°C while stirring. After 2 hours of reaction, 0.36 g of chain extender BDO (calculated based on the amount of titrated isocyanate so that the total moles of OH is the same as that of isocyanate); then the temperature was raised to 80°C by increasing the microwave power to 500W . The reaction was allowed to continue for another 2 hours. Based on FI-IR testing, the reaction was terminated when the isocyanate was completely reacted. The reaction solution was poured into methanol to precipitate a polymer product. Place the mixture in the refrigerator for 24 hours. A s...

Embodiment 3

[0092] process:

[0093] Add 30 mL of toluene to a 100 mL glass reactor and heat to 65 °C. 3.7 g of hydrogenated polybutadiene diol (H-HTPB) was added to the reactor. The mixture was stirred until H-HTPB was dissolved in toluene. Then 1.5 g of 4,4'-diphenylmethane diisocyanate was added, followed by 40 μL of dibutyltin dilaurate catalyst. The reaction mixture was heated with a conventional heater to maintain its temperature at 65°C while stirring. After 5 hours of reaction, 0.36 g of chain extender BDO (calculated based on the amount of isocyanate titrated so that the total moles of OH is the same as that of isocyanate); then the temperature was raised to 80° C. by increasing the heating power. The reaction was allowed to continue for another 5 hours. Based on FI-IR testing, the reaction was terminated when the isocyanate was completely reacted. The reaction solution was poured into methanol to precipitate a polymer product. Place the mixture in the refrigerator for 24 h...

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Abstract

Disclosed is a segmented thermoplastic elastomer that can be a polyurethane, polyurea, or polyurethane-urea comprising soft segments and hard segments, wherein the soft segments are made of polyolefindiols or polyolefin diamine that may have 0 to 1000 carbon atoms in the main chain, wherein each carbon atom in the main chain may have 0 to 2 side chains and each side chain may have 0 to 30 carbonatoms, the hard segment is made of a diisocyante and a chain extender, the hard segments make up 10-60% of the elastomer and the soft segments make up the rest, the number-average molecular weight ofthe elastomer is 5*10<3>-1000*10<3> g / mol, the ultimate elongation of the elastomer is 100-1000%, the Young's modulus is 1 to 3,000 MPa, and the ultimate tensile strength is 10-100 MPa. Also disclosedare a method for preparing the segmented thermoplastic elastomer and use of segmented thermoplastic elastomer.

Description

technical field [0001] The invention belongs to the field of macromolecular materials and relates to polyurethane containing polyolefin soft segments. More specifically, the present invention relates to polyurethanes, processes for their preparation and uses thereof. Background technique [0002] Polyolefins are a class of polymeric materials whose chains have soft and hard segments. Due to this special structure, polyurethane materials have many excellent properties, such as low temperature resistance, abrasion resistance, and high stability in biological environments, so they are widely used in aerospace products, medical devices, coatings, textiles, and leather. At present, polyurethane materials used in medical devices often have the following structure: a soft segment and a hard segment, the soft segment is formed from an oligomeric polyol such as polytetrahydrofuran (PTMO), polydimethylsiloxane alkane (PDMS) or aliphatic polycarbonate, while the hard segment consists...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/12C08G18/48C08G18/10C08G18/62
CPCC08G18/6208C08G18/7671C08G18/10C08G18/0852C08G18/246C08G18/3206B01J19/124B01J19/126C08G18/0895C08G18/12C08G18/4825C08G18/6212C08G18/6283C08G18/73C08G18/751C08G18/758C08G18/7621C08G18/7657
Inventor 陈景那海宁朱锦吕素平陈祥纪
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACAD OF SCI
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