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Preparation method of latex-imitated polyurethane sponge

A technology of polyurethane sponge and latex, which is applied in the field of preparation of latex-like polyurethane sponge, can solve problems such as low temperature resistance, poor stability, and limited application range, and achieve excellent low temperature resistance, good mechanical properties, and excellent physical properties.

Active Publication Date: 2021-11-02
南京金栖化工集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional imitation latex products have the disadvantages of airtightness, poor long-term use comfort, and easy pulverization; traditional polyurethane products have the advantages of good air permeability and no allergens, but they will harden under low temperature conditions, which also limits their use. Application range
[0003] Chinese patent CN108129629A discloses a latex feel polyurethane soft foam and its preparation method, which improves the feel of the sponge by adding calcium carbonate powder in the formula, but it will weaken the physical properties of the sponge, and the sponge will crack and drop slag when used for a long time and other problems, and cannot be washed
Although the prepared sponge has good hand feeling and excellent physical properties, it is not resistant to low temperature and cannot be washed with water.
[0004] Patents DE4108326 and EP03744776 disclose a synthetic method of silicone polyurethane foam, which first mixes polysiloxane, foaming agent, catalyst, and silicone oil evenly, and then reacts with polyisocyanate to obtain a one-step process for polyurethane foam; the above Both patents have incomplete reaction between polysiloxane and isocyanate, which reduces the physical properties of the prepared sponge
[0005] The existing production equipment of polyurethane sponge is chaotic in feeding, unable to realize automation, low in production efficiency, poor in stability, the pressure control device of the reactor needs electric control, complex in structure, difficult in installation, and the material in the reactor is not stable when transferring materials between multiple reactors. There are many residues, it is not easy to clean up, and the material loss is large

Method used

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  • Preparation method of latex-imitated polyurethane sponge
  • Preparation method of latex-imitated polyurethane sponge
  • Preparation method of latex-imitated polyurethane sponge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] (1) Preparation of component A:

[0045] At 25 ° C, 120 g of polyether polyol X, 5G water, 1G silicone oil W538, 0.8 g catalyst 9727 were added to the kettle A, and the rotational speed was 2000 r / min, stirred for 1 hour, and mixed evenly.

[0046] (2) Preparation of component B:

[0047] At room temperature, 43.19 g HDI and 215.955 g of Li Liquely MDI were added to the kettle B and then 0.15 g of sorbitol. After the nitrogen was replaced three times, push the kettle push to ≤ -0.098MPa, warm to 50 ° C, to the kettle Nitrogen to the kettle pressure is -0.05 MPa; 150 g of IOTA-2140 dropped into the kettle B, the dropwax time was 1 hour, and the heugaper was maintained at 45 ° C during the drop. After the drop was completed, the kettle was tapered to 85 ° C. And insulation is 2.5 hours, finally decreased to normal temperature, i.e., the prepolymer component B, and NCO% of the prepolymer component B is 20%.

[0048] (3) Preparation of the emulation of the latex polyurethane ...

Embodiment 2

[0051] (1) Preparation of component A:

[0052] At 35 ° C, 140 g of polyether polyol X, 7G water, 1.6 g silicone oil W538, 1.2 g of water, 1.6 g silicone oil W538, 1.2 g of catalyst 9727 were added to the kettle, 2500r / min, and stirred for 1 hour, mixed uniformly to obtain component A.

[0053] (2) Preparation of component B:

[0054] At room temperature, 65.875 gHDI and 230.625 g of Liquefied MDI were added to the kettle B for stirring for 50 minutes, then 0.25 g of glycerol, nitrogen gas was transferred three times, pumping kettle push to ≤ -0.098MPa, heated to 50 ° C, nitrogen in the kettle The kettle is -0.05 MPa; 125 giota-2130 is added to the kettle B, and the dropwax time is 1 hour. After the dropwise addition, the kettle is 50 ° C, after the drop is completed, the kettle is raised to 85 ° C, and After 2.5 hours, it was finally reduced to normal temperature, i.e., the prepolymer component B, and NCO% of the prepolymer component B were 23%.

[0055] (3) Preparation of the ...

Embodiment 3

[0058] (1) Preparation of component A:

[0059] At 30 ° C, 160 g of polyether polyol X, 3G water, 0.4 g of silicone W538, 0.4 g of catalyst 9727 were sequentially added to the reaction elbow, and the rotation speed was 3000 r / min, stirred for 1 hour, and mixed evenly.

[0060] (2) Preparation of component B:

[0061] At room temperature, 115.089 gHDI and 230.18 g of Liquefied MDI were added to the reactor for 60 minutes, then 0.65 g of dimhanolamine and nitrogen were added three times. Nitrogen to kettle is -0.05 MPa. The 130 giota-2120 was added dropwise to the kettle B, and the dropwax time was 1 hour. After the dropwise addition, he was 55 ° C. After the dropwise addition was completed, the kettle was reduced to 85 ° C, and the heat was 2.5 hours, and finally fell to normal temperature. That is, the prepolymer component B is obtained, and NCO% of the prepolymer component B is 25%.

[0062] (3) Preparation of the emulation of the latex polyurethane sponge:

[0063] At 25 ° C, ...

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Abstract

The invention provides a preparation method of latex-imitated polyurethane sponge, wherein the preparation method comprises the steps: reacting polysiloxane, a cross-linking agent and polyisocyanate to obtain a prepolymer component B by adopting a semi-prepolymer method, uniformly mixing polyether polyol X, deionized water, silicone oil and a catalyst to obtain a component A, finally stirring and mixing the component A and the prepolymer component B at a high speed, and reacting to obtain the latex-imitated polyurethane sponge. Too many auxiliaries are not needed, and the prepared latex-imitated polyurethane sponge has excellent weather resistance, air permeability, low temperature resistance, excellent physical performance and comfortable hand feeling and can be washed with water to be kept clean after being used for a long time; and according to the preparation device of the latex-imitated polyurethane sponge, intelligent feeding is achieved, reaction conditions are accurately controlled, the stability of a polyurethane sponge product is improved, the production efficiency is improved, energy consumption is reduced, and the production efficiency and the production quality are improved.

Description

Technical field [0001] The invention belongs to the manufacture Background technique [0002] The latex sponge is a porous rubber material that is a porous rubber material that is a hole or a porous rubber material that is unpainless, absorbed, and compressed fatigue, good carrying property, comfortable and durable. There are two commonly used methods of latex sponge: (1) Dunlop law, also known as mechanical foaming method or slow gel method (2) Trurafa, also known as vacuum foaming. Since the lactose sponge has some consumer group of allergies, the imitation of the latex products come to life. Traditional imitation latex products have a gas-absorbent, long-term use of comfort, and disadvantages of pulverization; traditional polyurethane products, good breathable, non-embarrassing origin, but it will harden it under low temperature conditions, but also limit it Application range. [0003] China Patent CN108129629A discloses a soft foam of latex homeric polyurethane and its prepar...

Claims

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Application Information

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IPC IPC(8): C08G18/66C08G18/65C08G18/61C08G18/48C08G18/12C08G18/32
CPCC08G18/6677C08G18/6517C08G18/61C08G18/48C08G18/12C08G18/6688C08G18/6535
Inventor 叶丞
Owner 南京金栖化工集团有限公司
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