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Preparation method of shape-restorable polyurethane material

A technology of polyurethane materials and polyols, which is applied in the field of preparation of shape-recoverable polyurethane materials, can solve problems such as damaged structures and application limitations of shape-memory materials, so as to improve the amplitude and folding resistance, and improve thermally induced length recovery rate and shape. good response rate

Inactive Publication Date: 2020-10-30
东阳市前途工业设计有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The existing inventions are all aimed at the research of thermotropic polyurethane shape memory materials. Although thermotropic shape memory polyurethane has a high shape recovery rate, simple operation and easy realization, in some heat-sensitive materials such as biomaterials, thermal stimulation will Destroying the structure of the original material leads to the limitation of the application of shape memory materials, while photoinduced shape memory polyurethane can avoid the damage to the original materials, greatly expanding the application range of shape memory materials, which is of great significance

Method used

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  • Preparation method of shape-restorable polyurethane material
  • Preparation method of shape-restorable polyurethane material
  • Preparation method of shape-restorable polyurethane material

Examples

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Embodiment 1

[0042] Add 60kg of polytetrahydrofuran into the reactor, and heat to 100 while stirring at 200r / min o C, evacuate to -0.1MPa, keep for 2h, then cool down to 45 o C, feed high-purity nitrogen to standard atmospheric pressure, add 30kg hexamethylene diisocyanate, 1kg cinnamic acid, heat up to 80 o C, react for 4 hours, evacuate to -0.1MPa, keep for 2 hours, and then pass nitrogen to standard atmospheric pressure to obtain a prepolymer reaction solution; mix 10kg1,4-butanediol, 5kg isophorone diamine, 7kg unsaturated wood The cellulose material and 0.1kg of bis(ethylhexanoyloxy)tin are mixed evenly, and are quickly added to the prepolymer reaction solution under nitrogen protection, stirred at 200r / min for 1min, and then poured into a Teflon mold. When the reaction solution turns into a gel, it is pressurized and solidified for 60 minutes, demolded, and then the product obtained is heated at 100 o After curing at C for 15 hours, a shape-recoverable polyurethane material was obt...

Embodiment 2

[0046] Add 63.1kg of poly 4-methylbutyrolactone diol into the reactor, and heat it to 102.3 while stirring at 226.6r / min o C, evacuate to -0.1MPa, keep for 2h, then cool down to 47 o C, feed high-purity nitrogen to standard atmospheric pressure, add 31.5kg of isophorone diisocyanate, 1.2kg of methyl cinnamate, and heat up to 80.8 o C, reacted for 3.8 hours, evacuated to -0.1MPa, kept for 2.2 hours, and then passed nitrogen to standard atmospheric pressure to obtain a prepolymer reaction liquid; -Methylphenyl)methane, 7kg unsaturated lignocellulosic material, and 0.1kg of dibutylene dilaurate are mixed uniformly, and are quickly added to the prepolymer reaction solution under nitrogen protection, and stirred at 200r / min for 1.3min, Then pour into the Teflon mold, when the reaction solution becomes gel, pressurize and solidify for 56min, demold, then the product obtained o After curing at C for 16.8 hours, a shape-recoverable polyurethane material was obtained.

[0047] The u...

Embodiment 3

[0050] Add 66.2kg of polypropylene glycol into the reactor and heat it to 106.6 while stirring at 244.3r / min o C, evacuate to -0.1MPa, keep for 2h, then cool down to 48 o C, feed high-purity nitrogen to standard atmospheric pressure, add 32.6kg biuret triisocyanate, 1.5kg ethyl cinnamate, and heat up to 81.9 o C, react for 3.5h, vacuumize to -0.1MPa, keep for 2.3h, and then pass nitrogen to standard atmospheric pressure to obtain the prepolymer reaction liquid; 12.4kg1,4-butanediol, 3.9kg of diaminodiethyltoluene, Mix 9kg of unsaturated lignocellulosic material and 0.1kg of dimethyltin dichloride evenly, quickly add it into the prepolymer reaction solution under nitrogen protection, stir at 200r / min for 1.8min, and then pour it into a Teflon mold , when the reaction solution turns into a gel, it is pressurized and solidified for 51.3 minutes, demolded, and then the obtained product is prepared at 104.6 o After curing at C for 19.1 hours, a shape-recoverable polyurethane mate...

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Abstract

The invention discloses a preparation method of a shape-restorable polyurethane material. The preparation method comprises the following steps of adding polyol into a reaction kettle, performing heating while stirring, conducting vacuumizing, carrying out reaction for a period of time, then performing cooling, introducing high-purity nitrogen to standard atmospheric pressure, adding isocyanate anda photochemical assistant, performing heating to carry out reaction for a period of time, conducting vacuumizing, and introducing nitrogen to standard atmospheric pressure to obtain a prepolymer reaction solution; uniformly mixing 1, 4-butanediol, diamine and a catalyst, quickly adding the mixture into prepolymer reaction liquid under the protection of nitrogen, performing quick stirring, then pouring the mixture into a Teflon mold, performing pressure curing and demolding when the reaction liquid becomes gel, and performing post-curing on the obtained product, thereby obtaining the shape-restorable polyurethane material. The shape-restorable polyurethane material obtained by the invention can achieve the effects of photoinduced memory shape restoration and thermoinduced memory shape restoration at the same time.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a preparation method of a shape-recoverable polyurethane material. Background technique [0002] Shape memory polymer (SMP) is a new class of functional polymer materials, which are endowed with a certain shape (initial state) under certain conditions. Fixed (transformation), if the external environment changes again in a specific way and regularity, they will reversibly return to the initial state, so far, complete the cycle of "memory initial state-fixed deformation-restore initial state". As a class of smart materials, shape memory polymers play an important role in biomaterials, and have a wide range of applications in surgical sutures, stents, heart valves, tissue engineering, drug release, orthopedics, and optical therapy. Biocompatibility Better polyurethane materials smart materials have a wide range of potential applications in the field of biomaterials. [0003] Tradi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/10C08G18/66C08G18/48C08G18/42C08G18/32C08G18/64C08G18/44C08H8/00C08K5/09C08K5/101
CPCC08G18/10C08G18/4081C08G18/4269C08G18/4277C08G18/44C08G18/4825C08G18/4854C08G18/664C08G18/6651C08G18/6674C08G18/6685C08G2280/00C08H8/00C08K5/09C08K5/101C08G18/3206C08G18/3234C08G18/6492C08G18/3243C08G18/324C08G18/3814
Inventor 蔡兰花王芳李培则
Owner 东阳市前途工业设计有限公司
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