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Preparation method of novel polyurethane material with excellent shape memory property

A technology of polyurethane material and polyurethane rubber is applied in the field of preparation of new polyurethane materials with excellent shape memory properties, which can solve the problems of mechanical properties decline, polymer aging, product discoloration, etc. Good impact strength

Inactive Publication Date: 2019-04-05
镇江利德尔复合材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Polyurethane, like other polymer materials, is subjected to the effects of heat, light, air, oxygen and water during storage and practical use, leading to aging and degradation of the polymer, discoloration and brittleness of the product, and a decline in mechanical properties, resulting in loss of practical value.

Method used

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  • Preparation method of novel polyurethane material with excellent shape memory property
  • Preparation method of novel polyurethane material with excellent shape memory property
  • Preparation method of novel polyurethane material with excellent shape memory property

Examples

Experimental program
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Effect test

preparation example Construction

[0033] The preparation method of the novel polyurethane material with excellent shape memory performance provided by the present invention comprises:

[0034] Step 1: 85-120 parts of polyurethane rubber, 28-45 parts of nitrile rubber, 8-12 parts of stearic acid, 1-7 parts of ethylene-vinyl acetate copolymer, 4.5-6 parts of vulcanization accelerator, 1-3 parts of heat stabilizer, 4-7 parts of nano-alumina, 2-4 parts of coulon resin, 1-3 parts of diisodecyl phthalate, 1-2 parts of antioxidant, 1-2 parts of hydroxyl silicone oil Parts were mixed evenly to obtain a mixture;

[0035] Vapor-phase SiO 2 After the powder and the mixture are fully mixed with a colloid mill, dehydration is carried out at a vacuum degree of 0.15Mpa and a temperature of about 184°C to 198°C, and the dehydration time is 2 to 4 hours;

[0036] Step 2. After releasing the vacuum, cool down to 60-75°C, add 15-25 parts of toluene diisocyanate, stir and slowly raise the temperature to 85°C under nitrogen atmo...

experiment example 1

[0053] Experimental example 1, in order to verify the physical performance of polyurethane material of the present invention, adopt same experimental condition to manufacture a plurality of samples and carry out mechanical performance test:

[0054] Polymerize to obtain mixture by weight fraction;

[0055] Vapor-phase SiO 2 After the powder and the mixture are fully mixed with a colloid mill, dehydration is carried out at a vacuum degree of 0.15Mpa and a temperature of about 184°C to 198°C, and the dehydration time is 2 to 4 hours;

[0056] Step 2. After releasing the vacuum, cool down to 60-75°C, add 15-25 parts of toluene diisocyanate, stir and slowly raise the temperature to 85°C under nitrogen atmosphere, and keep warm for 2-3 hours;

[0057] Step 3, vacuum defoaming for 0.8h to obtain a prepolymer;

[0058] Step 4, measure the -NCO group content in the prepolymer, according to the content, add the chain extender, stir evenly,

[0059] Chain extender adds parts by weigh...

experiment example 2

[0075] Step 1, the gas phase SiO 2 After the powder and the mixture are fully mixed with a colloid mill, dehydration is carried out at a vacuum degree of 0.15Mpa and a temperature of 184°C to 198°C, and the dehydration time is 2 to 4 hours;

[0076] Step 2. After releasing the vacuum, cool down to 60-75°C, add 15-25 parts of toluene diisocyanate, stir and slowly raise the temperature to 85°C under nitrogen atmosphere, and keep warm for 2-3 hours;

[0077] Step 3, vacuum defoaming for 0.8h to obtain a prepolymer;

[0078] Step 4, measure the -NCO group content in the prepolymer, according to the content, add the chain extender, stir evenly,

[0079] Chain extender adds parts by weight as:

[0080]

[0081] Wherein, n is the parts by weight of chain extender, I 1 is the -NCO group content in the prepolymer, r is the water mass fraction of the chain extender, a 0 is the mass fraction of water in the mixture obtained in step 1, σ 0 is a proportionality factor.

[0082] Af...

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Abstract

The invention discloses a preparation method of a novel polyurethane material with the excellent shape memory property. The preparation method is characterized by including the following steps: step 1, thoroughly mixing gas-phase SiO2 powder with a mixture by a colloid mill, and performing dehydration at the temperature of 184-198 DEG C and under the vacuum of 0.15Mpa for 2-4 hours; step 2, lowering the temperature to 60-75 DEG C after vacuum release, adding 15-25 parts of toluene diisocyanate, slowly increasing the temperature to 85 DEG C while stirring in a nitrogen atmosphere, and carryingout a heat preservation reaction for 2-3 hours; step 3, performing vacuum defoaming for 0.8h to obtain a prepolymer; step 4, measuring the content of -NCO groups in the prepolymer, adding a chain extender according to the content before uniform stirring, and performing drying after full reaction and cooling to obtain the polyurethane composite material. The preparation method has the advantages that the parts by weight of each component in the polyurethane material are provided, and the 'memory' performance of the polyurethane material can be effectively improved through a reasonable ratio ofnitrile rubber, stearic acid and urethane rubber.

Description

technical field [0001] The invention relates to the field of polyurethane material preparation and production, in particular to a preparation method of a novel polyurethane material with excellent shape memory performance. Background technique [0002] Shape memory polymer, referred to as SMP, has a unique ability to maintain shape, and can return to the original shape under certain external excitation conditions, showing the "memory" function of the original shape. SMP material has the advantages of relatively large deformation, low density, adjustable transition temperature, and good processing performance. Shape memory polymers have been widely used in medicine and construction industries, such as spacecraft deployment structures and variable aircraft. Medical wound sutures, etc. [0003] Polyurethane, like other polymer materials, is subjected to the effects of heat, light, air, oxygen and water during storage and practical use, leading to aging and degradation of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/04C08L9/02C08L23/08C08K13/02C08K5/09C08K3/22C08K5/12C08K3/36
CPCC08L75/04C08L2205/035C08L2201/12C08K2201/011C08K2003/2227C08L9/02C08L23/0853C08K13/02C08K5/09C08K3/22C08K5/12C08K3/36Y02P20/10
Inventor 邱丰胡永琪王宝才
Owner 镇江利德尔复合材料有限公司
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