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A method for preparing polyurethane foam that can settle rapidly in water

A polyurethane foam and fast technology, which is applied in the field of polymer material preparation, can solve the problems of high cost and tediousness, and achieve the effects of good rebound, good physical strength and simple operation

Active Publication Date: 2022-06-28
江苏钟山新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the prior art, a water-absorbing aid is added to the polyurethane foam that can quickly settle in water, so it cannot be reused; in addition, the preparation method of preparing the prepolymer first and then foaming is adopted, which is cumbersome and costly. higher

Method used

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  • A method for preparing polyurethane foam that can settle rapidly in water
  • A method for preparing polyurethane foam that can settle rapidly in water

Examples

Experimental program
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Effect test

example 1

[0030] Polyurethane flexible foam material 1 is prepared by the following method:

[0031] (1) under the condition of 25 ℃, take 60 parts by weight of polyether polyol A, 25 parts by weight of polyether polyol B, 10 parts by weight of polyether polyol C and 5 parts by weight of polymer polyol D, fully stir;

[0032] (2) Under the condition of 25°C, in 100 parts by weight of the material obtained in step (1), add 3 parts by weight of water, 0.1 part by weight of catalyst A-1, 0.3 part by weight of catalyst A-33 and 1 part by weight of foam stabilizer L580, stir well;

[0033] (3) Add 50 parts by weight of modified MDI (Wannate 8019, purchased from Wanhua Chemical) to the mixture obtained in step (2) at 25°C, stir at a high speed for 3-5s, pour it into a mold for free foaming, and pass 24 hours After aging, polyurethane flexible foam material 1 was obtained.

[0034] Among them, polyether polyol A is prepared by polyaddition reaction with glycerin as the starting agent, and is...

example 2

[0036] Polyurethane flexible foam material 2 is prepared by the following method:

[0037] (1) under the condition of 22 ℃, take 65 parts by weight of polyether polyol A, 15 parts by weight of polyether polyol B, 5 parts by weight of polyether polyol C and 15 parts by weight of polymer polyol D, and stir well;

[0038] (2) Under the condition of 22°C, in 100 parts by weight of the material obtained in step (1), add 3.8 parts by weight of water, 0.1 parts by weight of catalyst A-1, 0.5 parts by weight of catalyst A-33, and 1.2 parts by weight of foam stabilizer L580 and 30 parts by weight of calcium carbonate are fully stirred;

[0039] (3) Add 60 parts by weight of modified MDI (Wannate8122B, purchased from Wanhua Chemical) to the mixture obtained in step (2) at 22°C, stir at high speed for 3-5s, pour it into the mold and foam freely, and after 24 hours After aging, polyurethane flexible foam material 2 was obtained.

[0040] The polyether polyol A is prepared by polyadditio...

example 3

[0042] Polyurethane flexible foam material 3 is prepared by the following method:

[0043](1) Under the condition of 26°C, take 65 parts by weight of polyether polyol A, 25 parts by weight of polyether polyol B and 10 parts by weight of polyether polyol C, and stir well;

[0044] (2) Under the condition of 26°C, in 100 parts by weight of the material obtained in step (1), add 3.2 parts by weight of water, 0.1 part by weight of catalyst A-1, 0.5 part by weight of catalyst A-33 and 1.0 part by weight of foam stabilizer B8285, stir well;

[0045] (3) Under the condition of 26°C, 15 parts by weight of T-80 (toluene diisocyanate, purchased from Mitsui Chemicals, Japan) and 40 parts by weight of Wannate8019 (purchased from Wanhua Chemical, modified MDI) were added to the mixture obtained in step (2). ), stirred at high speed for 3-5s, poured into the mold for free foaming, and matured for 24 hours to obtain polyurethane flexible foam material 3.

[0046] Among them, polyether poly...

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Abstract

The invention provides a method for preparing polyurethane foam that can settle rapidly in water, and relates to the technical field of high molecular polymer material preparation. The method comprises: (1) taking 40-80 parts by weight of polyether polyol A, 5-30 parts by weight of polyether polyol B, 5-20 parts by weight of polyether polyol C and 0-20 parts by weight of polymer polyol D, Stir evenly; (2) In 100 parts by weight of the material obtained in step (1), add 1-6 parts by weight of water, 0.05-3 parts by weight of catalyst, 0.1-2 parts by weight of foam stabilizer and 0-50 parts by weight of filler , and stir evenly; (3) In the mixture obtained in step (2), add 30-70 parts by weight of isocyanate E, foam after stirring, and ripen to obtain polyurethane foam. The invention adopts a one-step foaming method without adding any water-absorbing auxiliary agent, and the prepared polyurethane foam has strong water-absorbing and water-retaining ability, can quickly sink into the bottom of water, and can be reused in water.

Description

technical field [0001] The invention relates to the technical field of preparation of high-molecular polymer materials, in particular to a method for preparing a polyurethane foam that can rapidly settle in water. Background technique [0002] Polyurethane is obtained by the mutual reaction of dibasic or polyvalent organic isocyanates and polyol compounds. Due to the different functionalities of the raw materials used, the polyurethane products can be made into high molecular polymers with linear or bulk structures. The diversification of its polymer structure makes it possible for polyurethane polymers to be used to manufacture plastics, rubbers, fibers, coatings, adhesives and other products. In recent decades, the polyurethane industry has developed rapidly. Due to various combinations of polyols and isocyanates, a series of polyurethane products with different properties have been prepared, especially in the field of polyurethane foam. [0003] With the needs of social...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/48C08G18/63C08K3/26C08G101/00
CPCC08G18/4072C08G18/4812C08G18/4837C08G18/632C08K3/26C08K2003/265
Inventor 俞中锋杨佳伟王新红吴亚清王金雪俞绿绿高宏飞
Owner 江苏钟山新材料有限公司
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