Preparation method of novel rapid-responded shape memorizing polyurethane

A polyurethane and memory technology, applied in the field of preparation of shape memory polyurethane, can solve the problems of low shape recovery rate, wrinkle wear, unsatisfactory memory effect, etc., and achieve high shape recovery rate and good memory effect

Inactive Publication Date: 2019-06-21
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] CN105524289B provides a method for solving the problem that existing paper products are prone to wrinkle and wear during use
[0004] However, the shape memory polyurethane in the prior art has a low shape recovery rate, and the memory effect is not ideal, so it cannot be widely used.

Method used

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  • Preparation method of novel rapid-responded shape memorizing polyurethane
  • Preparation method of novel rapid-responded shape memorizing polyurethane
  • Preparation method of novel rapid-responded shape memorizing polyurethane

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preparation example Construction

[0040] The present invention provides a novel preparation method of fast-response shape-memory polyurethane, which is obtained by prepolymerizing diisocyanate and polyester polyol, and then block-polymerizing it with diselenodiol. The mass parts of each component are as follows:

[0041] Polyester polyol: 50-100;

[0042] Diisocyanate: 25-50;

[0043] Diselenide: 12-15;

[0044] Organic solvent: 100-200;

[0045] Catalyst: 0.05-0.1;

[0046] Specifically include the following steps:

[0047] Step 1: Prepare modified titania catalyst,

[0048] Take the nano-titanium dioxide suspension, adjust the pH to 4.5-4.9, and then ultrasonically disperse for 30 minutes; add KH550, raise the temperature to 80°C-83°C, and react for 3h-3.5h; filter, wash with deionized water for 2-3 times, dry and pulverize, A modified titanium dioxide catalyst is obtained.

[0049] Step 2: Distill the polyester polyol for 3-5 hours under vacuum conditions, remove moisture, and control the vacuum degre...

Embodiment 1

[0066] The raw materials are polybutylene adipate, toluene diisocyanate, and the organic solvent is butanone; the preparation process specifically includes the following steps:

[0067] Step 1: Take 50g / L nano-titanium dioxide suspension, adjust the pH to 4.5 with acetic acid and disperse with ultrasonic waves for 30min; then add 10g / L KH550, and raise the temperature to 80°C for 3h; finally filter the reaction product and use After washing with deionized water, drying, and then pulverizing into fine powder particles, the modified titanium dioxide catalyst is obtained.

[0068] Step 2: Distill polybutylene adipate for 3 hours under vacuum conditions to remove moisture and control the vacuum degree to be less than or equal to 0.08MPa

[0069] Step 3: Mix 50 parts of polybutylene adipate, 25 parts of toluene diisocyanate, 100 parts of butanone and 0.05 parts of modified titanium dioxide catalyst in sequence, heat to 60° C. under nitrogen atmosphere, and stir for 3 hours;

[007...

Embodiment 2

[0078] The raw materials are polyethylene adipate, isophorone diisocyanate, and the organic solvent is tetrahydrofuran; the preparation process specifically includes the following steps:

[0079] Step 1: Take 50g / L nano-titanium dioxide suspension, adjust the pH to 4.6 with acetic acid and disperse with ultrasonic wave for 30min; then add 10g / L KH550, and raise the temperature to 82°C for 3.3h; finally filter the reaction product, Washing with deionized water, drying, and crushing into fine powder particles to obtain the modified titanium dioxide catalyst.

[0080] Step 2: Distill polyethylene adipate for 4 hours under vacuum conditions to remove moisture and control the vacuum degree to be less than or equal to 0.08MPa

[0081] Step 3: Mix 80 parts of polyethylene adipate, 40 parts of isophorone diisocyanate, 160 parts of tetrahydrofuran and 0.08 parts of modified titanium dioxide catalyst in sequence, heat to 70 °C under nitrogen atmosphere, and stir 5h;

[0082] Control t...

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Abstract

The invention discloses a preparation method of novel rapid-responded shape memorizing polyurethane. The novel rapid-responded shape memorizing polyurethane is prepared by pre-polymerizing diisocyanate and polyester polyol, and then polymerizing with bi-selenium glycol block. The novel rapid-responded shape memorizing polyurethane comprises the following components in parts by mass: 50-100 parts of polyester polyol, 25-50 parts of diisocyanate, 12-15 parts of bi-selenium glycol, 100-200 parts of an organic solvent, and 0.05-0.1 part of a catalyst. The method specifically comprises the following steps: 1, distilling polyester polyol for 3-5h in a vacuum condition in order to remove water; and controlling the vacuum degree to be not greater than 0.08MPa; 2, sequentially mixing polyester polyol, diisocyanate, the organic solvent and the catalyst; heating in a nitrogen atmosphere until the temperature is 60-75 DEG C; and stirring for 3-6h; and 3, adding bi-selenium glycol; maintaining thereaction temperature at 60-75 DEG C; and continuously stirring and reacting for 3-6h under nitrogen protection. The shape memorizing polyurethane prepared by the method is high in shape recovery rate,and has a good memorizing effect.

Description

technical field [0001] The invention relates to the technical field of preparation of shape-memory polyurethane, and more specifically, the invention relates to a preparation method of a novel fast-response shape-memory polyurethane. Background technique [0002] Polyurethane has a wide range of uses because of its good mechanical properties, toughness, wear resistance, plumpness, and brightness, and can be cured at low temperature. Elastic shape memory polyurethane has high resilience, good shock resistance, and adaptability. Ordinary polyurethane is widely used in the field of biomedicine because of its wear resistance, oil resistance, ozone resistance, and water resistance. At the same time, high waterproof and moisture-permeable fabrics can be obtained in textile applications. [0003] CN105524289B provides a method for solving the problem that existing paper products are prone to wrinkle and wear during use. Preparation of coating solution: 1. Add dry DMF and MDI to th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/42C08G18/32
Inventor 邱丰谢富平
Owner 镇江利德尔复合材料有限公司
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