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Polyurethane foam with high water absorption performance and high water retention performance and preparation method of polyurethane foam

A technology of polyurethane foam and high water absorption, which is applied in the fields of high water retention polyurethane foam and its preparation, high water absorption, polyurethane foam and its preparation field, can solve the problems of low grafting rate, uneven distribution of components, and water absorption of grafts. The problem of low magnification is to achieve the effect of light weight, good mechanical properties and strong water absorption

Active Publication Date: 2017-11-28
NANJING UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the process is complicated; the Chinese patent with the patent publication number of CN 103436007 A discloses a method of blending and foaming polyurethane obtained from polyether polyols with different combination ratios and water-absorbing resin to obtain water-absorbing flexible polyurethane foam; The water-absorbing resin is any one of cross-linked sodium polyacrylate, cross-linked copolymer of starch and acrylate, and cellulose grafted cross-linked sodium polyacrylate. Generally, the grafting rate of this graft is not high, and the composition The distribution is uneven, and the prepared water-absorbent resin has microscopic phase separation, resulting in a low water absorption rate of the final product

Method used

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  • Polyurethane foam with high water absorption performance and high water retention performance and preparation method of polyurethane foam
  • Polyurethane foam with high water absorption performance and high water retention performance and preparation method of polyurethane foam

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Effect test

Embodiment 1

[0031] A kind of high water absorption, high water retention polyurethane foam, its preparation process is: Step 1: the preparation of prepolymer: take polyether polyol by mass parts, vacuum dehydration at 120 ℃ for 2 hours; cool down to 40-50 ℃; add diisocyanate, catalyst and surfactant, stir evenly at 75 ℃ for 2 hours to obtain a prepolymer, the isocyanate content of the prepolymer is 1wt%, cool to 30-40 ℃ for use; step 2: foam material Preparation: quickly add water-absorbent resin to the prepolymer prepared in step 1, stir at a high speed for 3 minutes, and rotate at a speed of 1600r / min. After the liquid material is evenly mixed, quickly pour the foaming agent and stir at a high speed until the material turns white After slightly bubbling, pour it into the prepared mold quickly to fill the mold with foam, let it stand for 10 minutes, put it in a 60°C oven for 1 hour, cool and demould, and then the polyurethane foam with high water absorption and high water retention is obt...

Embodiment 2

[0034] A kind of high water absorption, high water retention polyurethane foam, its preparation process is: Step 1: the preparation of prepolymer: take polyether polyol by mass parts, vacuum dehydration at 120 ℃ for 2 hours; cool down to 40-50 ℃; add diisocyanate, catalyst and surfactant, stir evenly at 75 ℃ for 2 hours to obtain a prepolymer, the isocyanate content of the prepolymer is 6wt%, cool to 30-40 ℃ for use; step 2: foam material Preparation: quickly add water-absorbent resin to the prepolymer prepared in step 1, stir at a high speed at a speed of 1600r / min, after the liquid material is evenly mixed, quickly pour the foaming agent into it and stir at a high speed, until the material turns white slightly After foaming, quickly pour it into the prepared mold to fill the mold with foam, let it stand for 15 minutes, then put it in a 60°C oven to mature for 1 hour, cool and demould, and then the polyurethane foam with high water absorption and high water retention is obtain...

Embodiment 3

[0037] A kind of high water absorption, high water retention polyurethane foam, its preparation process is: Step 1: the preparation of prepolymer: take polyether polyol by mass parts, vacuum dehydration at 120 ℃ for 2 hours; cool down to 40-50 ℃; add diisocyanate, catalyst and surfactant, stir evenly at 80 ℃ for 2 hours to obtain a prepolymer, the isocyanate content of the prepolymer is 10wt%, cool to 30-40 ℃ for use; step 2: foam material Preparation: quickly add water-absorbent resin to the prepolymer prepared in step 1, stir at a high speed at a speed of 1600r / min, after the liquid material is evenly mixed, quickly pour the foaming agent into it and stir at a high speed, until the material turns white slightly After foaming, quickly pour it into the prepared mold to fill the mold with foam, let it stand for 20 minutes, put it in a 60°C oven for 2 hours, cool and demould, and then the polyurethane foam with high water absorption and high water retention is obtained.

[0038]...

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Abstract

The invention discloses polyurethane foam with high water absorption performance and high water retention performance and a preparation method of the polyurethane foam and belongs to the technical field of chemical engineering in high polymers. The polyurethane foam is prepared from components in parts by mass as follows: 80-120 parts of polyether glycol, 20-30 parts of diisocyanate, 0.5-55 parts of water-absorbent resin, 20-50 parts of a foaming agent, 0.2-3 parts of a surfactant and 0.2-2 parts of a catalyst through mixing. The preparation method comprises two steps of preparation of a prepolymer and preparation of a foam material. The polyurethane foam has the advantages of high water absorption performance, high water retention performance, high resilience, good compression performance and high stability.

Description

technical field [0001] The invention relates to a polyurethane foam and a preparation method thereof, more specifically to a highly water-absorbing, high water-retaining polyurethane foam and a preparation method thereof, belonging to the technical field of chemical polymers. Background technique [0002] Polyurethane foam contains hydrophilic groups such as carboxyl and hydroxyl groups, and is a polymer material with a certain degree of crosslinking. It has unique properties: strong water absorption and water retention, so it has a high application prospect in making water-absorbing foam. 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] The research on superabsorbent resin first appeared in 1961, when C.R.Russesell et al.’s research on starch-grafted acrylonitrile la...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/08C08L33/02C08L33/26C08G18/76C08G18/66C08G18/48C08G18/32C08J9/08C08G101/00
CPCC08G18/4816C08G18/4833C08G18/6674C08G18/7614C08L75/08C08L2205/035C08L2205/025C08G2110/0083C08L33/02C08L33/26
Inventor 王庭慰马洁
Owner NANJING UNIV OF TECH
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