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Polyurethane foam product and preparation method and application thereof

A polyurethane foam and product technology, applied in the field of polyurethane foam products and its preparation, can solve the problems of poor resilience and poor mechanical strength of microcellular polyurethane foam, which cannot be satisfied, and achieve excellent mechanical strength, no environmental pollution, and low compression deformation Effect

Inactive Publication Date: 2019-12-03
MIRACLL CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Invention patent CN103509168 B discloses a composition, preparation method and application of microcellular polyurethane, which uses an environmentally friendly foaming agent containing fluorinated ether with a boiling point in the range of about 0-75°C. Although compared with the traditional microcellular polyurethane foaming system (using 1,1,1,2-tetrafluorohexane as the foaming agent), it has a similar linear shrinkage rate and avoids the increase in cost caused by re-opening the mold, but this technology The microcellular polyurethane foam prepared by the scheme has the disadvantages of poor resilience and poor mechanical strength
[0004] Invention patent CN105683236 B discloses a low-density polyurethane microcellular elastomer. The polyurethane reaction mixture provided by this technical solution can not only prepare polyurethane foam products less than 500g / L, but also achieve better dimensional stability. But the same polyurethane foam product has the disadvantages of poor resilience and poor mechanical strength
[0005] Invention patent CN 105949434 B discloses a B-component isocyanate prepolymer and polyurethane two-component and its application for the preparation of microcellular polyurethane elastomers. The advantages of the two polyols are that the microcellular polyurethane elastomer prepared by a single polyether polyol has better hydrolysis resistance and mechanical properties, but the polyurethane foam products prepared by this technical scheme still have poor resilience and mechanical strength in essence poor disadvantage
[0006] Invention patent CN 105504259 B discloses a method for preparing polyurethane resin and its application in microcellular elastomers. It directly applies a polyether ester polyol to polyurethane microcellular elastomer materials, which is similar to the invention patent CN105949434 B. The technical principle, but the same polyurethane microcellular elastomer material has the disadvantages of poor resilience and poor mechanical strength
Although this technical solution has improved the resilience, tear strength and elongation of the product, it still cannot meet the requirements of the current market (such as shoe materials, seats) for product resilience, low compression deformation and mechanical properties.

Method used

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  • Polyurethane foam product and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] 1. Preparation of polymers containing NCO active groups

[0050] Add 100 parts by weight of 1800 g / mol polytetrahydrofuran polyether polyol with a functionality of 2 and 1 part by weight of antioxidant 1010 (purchased from Klein Company) into a glass reactor, heat it to 80°C and turn it on after the material melts Stir and heat up to 130°C, vacuum dehydrate to less than 200ppm, then cool down to 80°C, then add 30 parts by weight of MDI into the glass reactor, heat up to 110°C for 1.5h, and then add 0.3 parts by weight of Catalyst bismorpholine ethyl ether (DMDEE), continue to stir and react for 20 minutes, and finally discharge to obtain a polymer containing NCO active groups, which is sealed and stored. At the same time, the technical indicators of the product were tested as shown in Table 1.

[0051] 2. Preparation of polyurethane foam products

[0052] Take 100 parts by weight of the above-prepared polymer containing NCO active groups and 5 parts by weight of water...

Embodiment 2

[0054] 1. Preparation of polymers containing NCO active groups

[0055] Add 60 parts by weight of 2000g / mol polytetrahydrofuran polyol with a functionality of 2, 40 parts by weight of 2000g / mol, polybutylene adipate with a functionality of 2 and 0.5 parts by weight of inorganic filler talcum powder Put it into a glass reactor, heat it to 80°C and start stirring after the material melts, and raise the temperature to 130°C, vacuumize and dehydrate to less than 200ppm, then cool down to 80°C, then add 25 parts by weight of MDI into the glass reactor, and heat up React at 110°C for 1.5 hours, then add 0.2 parts by weight of the catalyst bismorpholine ethyl ether (DMDEE), continue to stir and react for 20 minutes, and finally discharge the material to obtain a polymer containing NCO active groups, keep it sealed and test at the same time The technical indicators of the product are shown in Table 1.

[0056] 2. Preparation of polyurethane foam products

[0057] Mix 100 parts by we...

Embodiment 3

[0059] 1. Preparation of polymers containing NCO active groups

[0060] Add 100 parts by weight of 1000 g / mol polytetrahydrofuran polyether polyol with a functionality of 2 and 2 parts by weight of OB-1 fluorescent agent into a glass reactor, heat to 80 ° C and start stirring after the material melts, and raise the temperature to 130 ℃, vacuum dehydration to less than 200ppm, then lower the temperature to 80°C, then add 50 parts by weight of MDI into the glass reactor, heat up to 110°C for 1.5h, and then add 1 part by weight of catalyst bismorpholine ethyl Ether (DMDEE), continue to stir and react for 20min, and finally discharge to obtain a polymer containing NCO active groups, which is sealed and stored, and the technical indicators of the product are shown in Table 1.

[0061] 2. Preparation of polyurethane foam products

[0062] Put 100 parts by weight of the polymer containing NCO active groups prepared above into the extruder, then inject 2 parts by weight of water into...

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Abstract

The invention relates to a polyurethane foam product and a preparation method and application thereof, and belongs to the field of polymer foam materials. The polyurethane foam product is prepared from an NCO-active-group-containing polymer and water, and the polyurethane foam product has a density of 0.08-0.8 g / cm<3> and a resiliency of 55-75%. The NCO-active-group-containing polymer is directlyreacted and foamed with the water, so that the content of allophanate groups in the prepared polyurethane foam product is high, and compared with carbamate groups formed by reacting NCO groups of a traditional polyurethane foam product with polymer polyol, the allophanate groups in the polyurethane foam product have higher polarity. Therefore, the prepared polyurethane foam product has the characteristics of low compression deformation, high resilience, excellent mechanical strength and the like.

Description

technical field [0001] The invention relates to a polyurethane foam product and its preparation method and application, belonging to the field of polymer foam materials. Background technique [0002] At present, most of the foamed plastics are based on plastic, and a large number of air bubbles are obtained inside the plastic matrix by adding physical or chemical foaming agents. Foamed plastic materials are widely used in the fields of daily necessities, shoe materials, sporting goods, packaging, construction and automobiles due to their light specific gravity, heat insulation, shock absorption and sound absorption. [0003] Microcellular polyurethane foam is usually formed by blowing a polyurethane reaction mixture. Invention patent CN103509168 B discloses a composition, preparation method and application of microcellular polyurethane, which uses an environmentally friendly foaming agent containing fluorinated ether with a boiling point in the range of about 0-75°C. Altho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/40C08G18/42C08G18/48C08J9/08C08G101/00
CPCC08G18/4018C08G18/4238C08G18/4277C08G18/4854C08G2110/005C08G2110/0083
Inventor 宋红玮王光阜高玉宝周娅杨冲冲
Owner MIRACLL CHEM
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