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Water-absorbing soft polyurethane foam and preparation method thereof

A soft polyurethane and water-absorbing polymer technology, applied in the field of polyurethane foam, can solve the problems of no water-absorbing capacity, affecting the application field, easy to separate out with water, etc., achieving strong water-absorbing and water-retaining capacity, good market prospects, and good resilience Effect

Active Publication Date: 2013-12-11
QUANZHOU YUANLI SHOES MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

), but because the foam skeleton itself has no water absorption capacity or weak water absorption capacity, the water-absorbing substances are dispersed in the foam and are easy to precipitate with water, so the use is subject to certain limitations, which affects its application field

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A kind of water-absorbing soft polyurethane foam, is made up of each component of following parts by weight:

[0029] 40 parts of polytetrahydrofuran ether triol, 60 parts of polyethylene glycol, 30 parts of toluene diisocyanate, 10 parts of cross-linked sodium polyacrylate (50 mesh), 2 parts of distilled water, 0.5 part of dibutyltin dilaurate, and 1 part of silicone oil.

[0030] Its preparation process is:

[0031] (1) Preparation of combined polyether: weigh 40 parts of polytetrahydrofuran ether triol (3000 g / mol), 60 parts of polyethylene glycol (1000 g / mol), 2 parts of distilled water, and 0.5 parts of dibutyltin dilaurate Add 1 part of silicone oil into the beaker together, stir at 40°C for 5 min to obtain a homogeneous mixture, set aside;

[0032] (2) Preparation of foam material: quickly add 10 parts of cross-linked sodium polyacrylate (50 mesh) and 30 parts of toluene diisocyanate to step (1), and stir regularly. After the liquid material turns white, quickly...

Embodiment 2

[0034] A kind of water-absorbing soft polyurethane foam, is made up of each component of following parts by weight:

[0035] 60 parts of polytetrahydrofuran ether triol, 40 parts of polyethylene glycol, 50 parts of toluene diisocyanate, 50 parts of cross-linked sodium polyacrylate (10 mesh), 4 parts of distilled water, 1 part of dibutyltin dilaurate, and 3 parts of silicone oil.

[0036] Its preparation process is:

[0037] (1) Preparation of combined polyether: weigh 60 parts of polytetrahydrofuran ether triol (3000 g / mol), 40 parts of polyethylene glycol (1000 g / mol), 4 parts of distilled water, and 1 part of dibutyltin dilaurate Add 3 parts of silicone oil into the beaker together, stir at 50°C for 10 minutes to obtain a uniform mixture, which is ready for use;

[0038] (2) Preparation of foam material: quickly add 30 parts of cross-linked sodium polyacrylate (100 mesh) and 50 parts of toluene diisocyanate to step (1), and stir regularly. After the liquid material turns wh...

Embodiment 3

[0040] A kind of water-absorbing soft polyurethane foam, is made up of each component of following parts by weight:

[0041] 50 parts of polytetrahydrofuran ether triol, 50 parts of polyethylene glycol, 40 parts of toluene diisocyanate, 20 parts of cross-linked sodium polyacrylate (300 mesh), 3 parts of distilled water, 0.75 parts of dibutyltin dilaurate, 2 parts of silicone oil.

[0042] Its preparation process is:

[0043] (1) Preparation of combined polyether: weigh 50 parts of polytetrahydrofuran ether triol (3000 g / mol), 50 parts of polyethylene glycol (1000 g / mol), 3 parts of distilled water, and 0.75 parts of dibutyltin dilaurate Add 2 parts of silicone oil into a beaker together, stir at 30°C for 20 min to obtain a uniform mixture, and set aside;

[0044](2) Preparation of foam material: quickly add 20 parts of cross-linked sodium polyacrylate (300 mesh) and 40 parts of toluene diisocyanate to step (1), and stir regularly. After the liquid material turns white, quickl...

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Abstract

The invention relates to the technical field of polyurethane foam and provides water-absorbing soft polyurethane foam which has the advantages of good toughness, good rebounding effect, strong water absorbing capacity and good water absorbing stability. The water-absorbing soft polyurethane foam is prepared from the following ingredients in parts by weight: 40-60 parts of polymer polyol, 40-60 parts of polyethylene glycol, 30-50 parts of diisocyanate, 10-30 parts of water absorbent polymer, 2-4 parts of foamer, 0.5-1 part of catalyst and 1-3 parts of foam stabilizer. Meanwhile, the invention provides a preparation method of the water-absorbing soft polyurethane foam, which comprises the following steps: (1) preparing combined polyether; and (2) preparing a foam material.

Description

technical field [0001] The invention relates to the technical field of polyurethane foam, in particular to a water-absorbing flexible polyurethane foam and a preparation method thereof. Background technique [0002] Superabsorbent resin is a new type of functional polymer material with a three-dimensional network space structure and low crosslinking degree developed in recent decades. It has a water absorption capacity dozens or even thousands of times its own mass. Moisture can also be retained under dry air, but the ability to release absorbed moisture can be slowly controlled in dry air. Therefore, it has broad application prospects in agriculture, forestry, horticulture, medicine, physiological hygiene, petroleum, chemical industry, daily necessities, environmental protection, building materials, biochemical technology, food and other fields. [0003] At present, the existing superabsorbent resins are roughly divided into three series according to their different prepa...

Claims

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Application Information

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IPC IPC(8): C08L75/08C08L75/06C08L33/02C08L51/02C08G18/76C08G18/48C08G18/42C08J9/08
Inventor 张连锋
Owner QUANZHOU YUANLI SHOES MATERIAL
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