CN110551268A - Slow-speed waterborne polyurethane foam material and preparation process thereof - Google Patents

Slow-speed waterborne polyurethane foam material and preparation process thereof Download PDF

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Publication number
CN110551268A
CN110551268A CN201910787947.4A CN201910787947A CN110551268A CN 110551268 A CN110551268 A CN 110551268A CN 201910787947 A CN201910787947 A CN 201910787947A CN 110551268 A CN110551268 A CN 110551268A
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parts
prepare
polyol
molecular weight
slow
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张伟
徐斌
虞益辉
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Pangu New Material Technology Suzhou Co Ltd
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Pangu New Material Technology Suzhou Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/08—Processes
    • C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/08—Processes
    • C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
    • C08G18/12—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step using two or more compounds having active hydrogen in the first polymerisation step
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/40—High-molecular-weight compounds
    • C08G18/4009—Two or more macromolecular compounds not provided for in one single group of groups C08G18/42 - C08G18/64
    • C08G18/4018—Mixtures of compounds of group C08G18/42 with compounds of group C08G18/48
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/40—High-molecular-weight compounds
    • C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/40—High-molecular-weight compounds
    • C08G18/48—Polyethers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G2110/00—Foam properties
    • C08G2110/0083—Foam properties prepared using water as the sole blowing agent

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Polyurethanes Or Polyureas (AREA)

Abstract

The invention discloses a preparation process of a slow-speed waterborne polyurethane foam material, which comprises the following steps: s1, reacting polyisocyanate with polyol to prepare NCO group terminated prepolymer; s2, uniformly stirring 1.2mol of end-capping agent and 1mol of prepolymer end-capped by NCO groups in an ethyl acetate solution at the temperature of 30 ℃ to prepare a black material curing agent marked as A; s3, according to the mass ratio, 20-80 parts of polyol, 1-2 parts of catalyst, 0.5-1 part of defoaming agent and 1-1.5 parts of water are stirred uniformly at the temperature of 60 ℃ to prepare a resin part, which is marked as B; and S4, fully mixing and uniformly stirring the A and the B, adding the A and the B into a 65 ℃ mold, and carrying out a foaming reaction after 15min to grow the polyurethane foaming material. The polyurethane foaming and gelling time can be greatly prolonged, raw materials with different viscosities can be used, the cost can be reduced by a physical blending method, the application range is expanded, and the polyurethane foaming and gelling time is energy-saving and environment-friendly.

Description

slow-speed waterborne polyurethane foam material and preparation process thereof
Technical Field
The invention relates to the field of polyurethane composite materials and preparation thereof, in particular to a slow-speed aqueous polyurethane foam material and a preparation process thereof.
background
The polyurethane foaming material has wide application in the fields of aviation, military, construction, clothing and the like. The existing polyurethane foaming material and the existing technology are that under the condition of high-speed stirring, the mixture is quickly poured into a grinding tool for gel foaming. Because the gel of the polyurethane foaming material system needs to react with the foam in a balanced manner, the gel enables the polyurethane material to have certain supporting strength, the foam can enable a plurality of hole structures to be formed in the polyurethane, the polyurethane foaming material system is generally stirred for 10-20s, the time for pouring the polyurethane foaming material system into a grinding tool is 30-50s, namely, the stirring and injection molding process flow is completed within 50s, otherwise, the polyurethane material is foamed and molded in the stirring process, and the product fails. The viscosity of the raw materials of the polyurethane foam material is required to be lower in a short process window, the polyurethane foam material is beneficial to being uniformly stirred in a short time and fully flowing and filling in a mold, the viscosity is generally required to be not higher than 2000mPa.s, the requirements on the raw materials and the process are strict, and meanwhile, the cost of the polyurethane foam material cannot be remarkably reduced under the condition that the chemical technology and the efficiency are not greatly improved, so that the production and the application of the polyurethane foam material are limited.
disclosure of Invention
the invention aims to solve the technical problem of providing a slow-speed aqueous polyurethane foaming material and a preparation process thereof, which can greatly prolong the foaming and gelling time of polyurethane, can use raw materials with different viscosities, can reduce the cost by a physical blending method, enlarge the application range, save energy and protect environment.
In order to solve the technical problems, the invention provides a preparation process of a slow-speed aqueous polyurethane foam material, which comprises the following steps:
s1, reacting polyisocyanate with polyol to prepare NCO group terminated prepolymer;
s2, uniformly stirring 1.2mol of end-capping agent and 1mol of prepolymer end-capped by NCO groups in an ethyl acetate solution at the temperature of 30 ℃ to prepare a black material curing agent marked as A;
s3, according to the mass ratio, 20-80 parts of polyol, 1-2 parts of catalyst, 0.5-1 part of defoaming agent and 1-1.5 parts of water are stirred uniformly at the temperature of 60 ℃ to prepare a resin part, which is marked as B;
And S4, fully mixing and uniformly stirring the A and the B, adding the A and the B into a 65 ℃ mold, and carrying out a foaming reaction after 15min to grow the polyurethane foaming material.
preferably, the polyisocyanate is one or more of polymethylene polyphenyl isocyanate, toluene diisocyanate and diphenylmethane diisocyanate.
Preferably, the polyol includes polyether polyol which is polyether polyol with molecular weight of 1000, 2000, 6000 or 100, and/or polyester polyol which is polyester polyol with molecular weight of 1400, 1100, 300 or 200.
preferably, the method comprises the following steps:
s1, reacting polyisocyanate with polyol to prepare NCO group terminated prepolymer;
S2, uniformly stirring 1.2mol of end-capping agent and 1mol of prepolymer end-capped by NCO groups in an ethyl acetate solution at the temperature of 30 ℃ to prepare a black material curing agent marked as A;
S3, according to the mass ratio, 20-30 parts of polyether polyol, 30-50 parts of polyester polyol, 1-2 parts of catalyst, 0.5-1 part of defoaming agent and 1-1.5 parts of water are stirred uniformly at the temperature of 60 ℃ to prepare a resin part, which is marked as B;
And S4, fully mixing and uniformly stirring the A and the B, adding the A and the B into a 65 ℃ mold, and carrying out a foaming reaction after 15min to grow the polyurethane foaming material.
preferably, the capping agent is sodium bisulfite.
preferably, the catalyst is an organozinc.
preferably, the defoaming agent is dimethicone.
Preferably, the foaming material is prepared by the slow-speed preparation process of the waterborne polyurethane foaming material.
Compared with the prior art, the invention has the beneficial effects that:
1. in the production and preparation process, the invention does not use fluorine-containing foaming agents such as HCFC-141b and the like, adopts full water for foaming, does not generate toxic and harmful gases, and is green and environment-friendly.
2. The invention seals the end of the active black material curing agent A part to ensure that the curing agent A does not react with the resin part B at normal temperature, and the foaming reaction is carried out when the temperature is 60 ℃, thereby prolonging the stirring and injection time of a polyurethane foam material system, widening the material selection range, being beneficial to reducing the cost and expanding the application field of the polyurethane foam material.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to be able to obtain other drawings based on these drawings without creative efforts.
FIG. 1 shows the reaction mechanism of isocyanate with hydroxyl group-containing polyol.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The embodiment discloses a preparation process of a slow-speed waterborne polyurethane foam material, which comprises the following steps:
S1, reacting polyisocyanate with polyol to prepare NCO group terminated prepolymer;
S2, uniformly stirring 1.2mol of end-capping agent and 1mol of prepolymer end-capped by NCO groups in an ethyl acetate solution at the temperature of 30 ℃ to prepare a black material curing agent, which is marked as A, wherein the reaction mechanism is shown in figure 1;
s3, according to the mass ratio, 20-80 parts of polyol, 1-2 parts of catalyst, 0.5-1 part of defoaming agent and 1-1.5 parts of water are stirred uniformly at the temperature of 60 ℃ to prepare a resin part, which is marked as B;
And S4, fully mixing and uniformly stirring the A and the B, adding the A and the B into a 65 ℃ mold, and carrying out a foaming reaction after 15min to grow the polyurethane foaming material.
The polyisocyanate is one or more of polymethylene polyphenyl isocyanate, toluene diisocyanate and diphenylmethane diisocyanate.
The above polyols include polyether polyols and/or polyester polyols. The polyether polyol is polyether polyol with molecular weight of 1000, 2000, 6000 or 100. The polyester polyol is 1400 molecular weight polyester polyol, 1100 molecular weight polyester polyol, 300 molecular weight polyester polyol or 200 molecular weight polyester polyol.
The end-capping reagent is sodium bisulfite.
The catalyst is organic zinc.
The defoaming agent is dimethyl silicone oil.
Example 2
The embodiment discloses a preparation process of a slow-speed waterborne polyurethane foam material, which comprises the following steps:
S1, reacting polyisocyanate with polyol to prepare NCO group terminated prepolymer;
s2, uniformly stirring 1.2mol of end-capping agent and 1mol of prepolymer end-capped by NCO groups in an ethyl acetate solution at the temperature of 30 ℃ to prepare a black material curing agent marked as A;
S3, according to the mass ratio, 20-30 parts of polyether polyol, 30-50 parts of polyester polyol, 1-2 parts of catalyst, 0.5-1 part of defoaming agent and 1-1.5 parts of water are stirred uniformly at the temperature of 60 ℃ to prepare a resin part, which is marked as B;
And S4, fully mixing and uniformly stirring the A and the B, adding the A and the B into a 65 ℃ mold, and carrying out a foaming reaction after 15min to grow the polyurethane foaming material.
Example 3
s1, reacting 1mol of PM200 with 0.2mol of PPG210 to prepare an NCO group terminated prepolymer;
s2, stirring 1.2mol of sodium bisulfite and 1mol of prepolymer blocked by NCO groups in ethyl acetate solution at 30 ℃ to prepare a black material curing agent marked as A.
S3, stirring 50 parts of polyester polyol with the molecular weight of 1100, 30 parts of polyether polyol with the molecular weight of 300, 1 part of organic zinc as a catalyst, 0.5 part of dimethyl silicone oil as a defoaming agent and 1 part of water uniformly at the temperature of 60 ℃ to prepare a resin part, wherein the total amount of hydroxyl-OH functional groups is controlled to be 1mol and is marked as B;
And S4, fully mixing and uniformly stirring the A and the B, adding the A and the B into a 65 ℃ mold, and carrying out a foaming reaction after 15min to grow the polyurethane foaming material.
Example 4
S1, reacting 1mol of TDI with 0.2mol of PPG210 to prepare an NCO group terminated prepolymer;
S2, uniformly stirring 1.2mol of sodium bisulfite and 1mol of prepolymer blocked by NCO groups in an ethyl acetate solution at the temperature of 30 ℃ to prepare a black material curing agent marked as A;
S3, stirring 50 parts of polyester polyol with the molecular weight of 1100, 30 parts of polyether polyol with the molecular weight of 300, 1 part of organic zinc as a catalyst, 0.5 part of dimethyl silicone oil as a defoaming agent and 1 part of water uniformly at the temperature of 60 ℃ to prepare a resin part, wherein the total amount of hydroxyl-OH functional groups is controlled to be 1mol and is marked as B;
And S4, fully mixing and uniformly stirring the A and the B, adding the A and the B into a 65 ℃ mold, and carrying out a foaming reaction after 15min to grow the polyurethane foaming material.
Example 5
s1, reacting 1mol of MDI with 0.2mol of PPG210 to prepare a prepolymer terminated by NCO groups;
S2, uniformly stirring 1.2mol of sodium bisulfite and 1mol of prepolymer blocked by NCO groups in an ethyl acetate solution at the temperature of 30 ℃ to prepare a black material curing agent marked as A;
S3, stirring 50 parts of polyester polyol with the molecular weight of 1100, 30 parts of polyether polyol with the molecular weight of 300, 1 part of organic zinc as a catalyst, 0.5 part of dimethyl silicone oil as a defoaming agent and 1 part of water uniformly at the temperature of 60 ℃ to prepare a resin part, wherein the total amount of hydroxyl-OH functional groups is controlled to be 1mol and is marked as B;
And S4, fully mixing and uniformly stirring the A and the B, adding the A and the B into a 65 ℃ mold, and carrying out a foaming reaction after 15min to grow the polyurethane foaming material.
example 6
S1, reacting 1mol of TDI with 0.2mol of PPG210 to prepare an NCO group terminated prepolymer;
s2, uniformly stirring 1.2mol of sodium bisulfite and 1mol of prepolymer blocked by NCO groups in an ethyl acetate solution at the temperature of 30 ℃ to prepare a black material curing agent marked as A;
s3, stirring 50 parts of polyester polyol with the molecular weight of 1100, 30 parts of polyether polyol with the molecular weight of 1000, 1 part of organic zinc as a catalyst, 0.5 part of dimethyl silicone oil as a defoaming agent and 1 part of water uniformly at the temperature of 60 ℃ to prepare a resin part, wherein the total amount of hydroxyl-OH functional groups is controlled to be 1mol and is marked as B;
and S4, fully mixing and uniformly stirring the A and the B, adding the A and the B into a 65 ℃ mold, and carrying out a foaming reaction after 15min to grow the polyurethane foaming material.
example 7
s1, reacting 1mol of TDI with 0.2mol of PPG210 to prepare an NCO group terminated prepolymer;
S2, uniformly stirring 1.2mol of sodium bisulfite and 1mol of prepolymer blocked by NCO groups in an ethyl acetate solution at the temperature of 30 ℃ to prepare a black material curing agent marked as A;
S3, according to the mass ratio, 50 parts of polyester polyol with the molecular weight of 1400, 30 parts of polyether polyol with the molecular weight of 2000, 1 part of organic zinc as a catalyst, 0.5 part of dimethyl silicone oil as a defoaming agent and 1 part of water are uniformly stirred at the temperature of 60 ℃ to prepare a resin part, wherein the total amount of hydroxyl-OH functional groups is controlled to be 1mol and is marked as B;
And S4, fully mixing and uniformly stirring the A and the B, adding the A and the B into a 65 ℃ mold, and carrying out a foaming reaction after 15min to grow the polyurethane foaming material.
example 8
s1, reacting 1mol of TDI with 0.2mol of PPG210 to prepare an NCO group terminated prepolymer;
S2, uniformly stirring 1.2mol of sodium bisulfite and 1mol of prepolymer blocked by NCO groups in an ethyl acetate solution at the temperature of 30 ℃ to prepare a black material curing agent marked as A;
s3, according to the mass ratio, 20 parts of polyester polyol with the molecular weight of 200, 50 parts of polyether polyol with the molecular weight of 6000, 1 part of organic zinc as a catalyst, 0.5 part of dimethyl silicone oil as a defoaming agent and 1 part of water are uniformly stirred at the temperature of 60 ℃ to prepare a resin part, wherein the total amount of hydroxyl-OH functional groups is controlled to be 1mol and is marked as B;
and S4, fully mixing and uniformly stirring the A and the B, adding the A and the B into a 65 ℃ mold, and carrying out a foaming reaction after 15min to grow the polyurethane foaming material.
Example 9
S1, reacting 1mol of TDI with 0.2mol of PPG210 to prepare an NCO group terminated prepolymer;
S2, uniformly stirring 1.2mol of sodium bisulfite and 1mol of prepolymer blocked by NCO groups in an ethyl acetate solution at the temperature of 30 ℃ to prepare a black material curing agent marked as A;
S3, according to the mass ratio, 20 parts of polyester polyol with the molecular weight of 1400, 50 parts of polyether polyol with the molecular weight of 300, 1.5 parts of organic zinc as a catalyst, 0.5 part of dimethyl silicone oil as a defoaming agent and 2 parts of water are uniformly stirred at the temperature of 60 ℃ to prepare a resin part, wherein the total amount of hydroxyl-OH functional groups is controlled to be 1mol and is marked as B;
And S4, fully mixing and uniformly stirring the A and the B, adding the A and the B into a 65 ℃ mold, and carrying out a foaming reaction after 15min to grow the polyurethane foaming material.
example 10
s1, reacting 1mol of PM200 with 0.1mol of PPG220 to prepare an NCO group terminated prepolymer;
s2, uniformly stirring 1.2mol of sodium bisulfite and 1mol of prepolymer blocked by NCO groups in an ethyl acetate solution at the temperature of 30 ℃ to prepare a black material curing agent marked as A;
S3, according to the mass ratio, preparing a resin part by uniformly stirring 10 parts of polyester polyol with the molecular weight of 300, 60 parts of polyether polyol with the molecular weight of 2000, 1.5 parts of organic zinc as a catalyst, 0.5 part of dimethyl silicone oil as a defoaming agent and 2 parts of water at the temperature of 60 ℃, and controlling the total amount of hydroxyl-OH functional groups to be 1mol and marking as B;
And S4, fully mixing and uniformly stirring the A and the B, adding the A and the B into a 65 ℃ mold, and carrying out a foaming reaction after 15min to grow the polyurethane foaming material.
example 11
s1, reacting 0.5mol of PM200 and 0.5mol of TDI with 0.1mol of PPG220 to prepare an NCO group terminated prepolymer;
s2, uniformly stirring 1.2mol of sodium bisulfite and 1mol of prepolymer blocked by NCO groups in an ethyl acetate solution at the temperature of 30 ℃ to prepare a black material curing agent marked as A;
S3, according to the mass ratio, preparing a resin part by uniformly stirring 10 parts of polyester polyol with the molecular weight of 300, 60 parts of polyether polyol with the molecular weight of 2000, 1.5 parts of organic zinc as a catalyst, 0.5 part of dimethyl silicone oil as a defoaming agent and 2 parts of water at the temperature of 60 ℃, and controlling the total amount of hydroxyl-OH functional groups to be 1mol and marking as B;
and S4, fully mixing and uniformly stirring the A and the B, adding the A and the B into a 65 ℃ mold, and carrying out a foaming reaction after 15min to grow the polyurethane foaming material.
example 12
s1, reacting 0.5mol of MDI, 0.5mol of TDI and 0.2mol of PPG210 to prepare NCO group terminated prepolymer;
S2, uniformly stirring 1.2mol of sodium bisulfite and 1mol of prepolymer blocked by NCO groups in an ethyl acetate solution at the temperature of 30 ℃ to prepare a black material curing agent marked as A;
S3, according to the mass ratio, preparing a resin part by uniformly stirring 10 parts of polyester polyol with the molecular weight of 300, 60 parts of polyether polyol with the molecular weight of 2000, 1.5 parts of organic zinc as a catalyst, 0.5 part of dimethyl silicone oil as a defoaming agent and 2 parts of water at the temperature of 60 ℃, and controlling the total amount of hydroxyl-OH functional groups to be 1mol and marking as B;
and S4, fully mixing and uniformly stirring the A and the B, adding the A and the B into a 65 ℃ mold, and carrying out a foaming reaction after 15min to grow the polyurethane foaming material.
Example 13
s1, reacting 0.5mol of MDI, 0.5mol of TDI and 0.2mol of PPG303 to prepare NCO group terminated prepolymer;
s2, uniformly stirring 1.2mol of sodium bisulfite and 1mol of prepolymer blocked by NCO groups in an ethyl acetate solution at the temperature of 30 ℃ to prepare a black material curing agent marked as A;
S3, according to the mass ratio, preparing a resin part by uniformly stirring 10 parts of polyester polyol with the molecular weight of 300, 60 parts of polyether polyol with the molecular weight of 2000, 1.5 parts of organic zinc as a catalyst, 0.5 part of dimethyl silicone oil as a defoaming agent and 2 parts of water at the temperature of 60 ℃, and controlling the total amount of hydroxyl-OH functional groups to be 1mol and marking as B;
and S4, fully mixing and uniformly stirring the A and the B, adding the A and the B into a 65 ℃ mold, and carrying out a foaming reaction after 15min to grow the polyurethane foaming material.
Chinese name and English abbreviation comparison table:
Polymethylene polyphenyl isocyanate: PM200
Toluene diisocyanate: TDI
diphenylmethane diisocyanate: MDI (Diphenyl-methane-diisocyanate)
Polyether polyol having a molecular weight of 1000: PPG210
Polyether polyol having a molecular weight of 2000: PPG220
polyether polyol having a molecular weight of 6000: PPG360
Polyether polyol having a molecular weight of 100: PPG303
the previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (8)

1. A preparation process of a slow-speed aqueous polyurethane foam material is characterized by comprising the following steps:
S1, reacting polyisocyanate with polyol to prepare NCO group terminated prepolymer;
s2, uniformly stirring 1.2mol of end-capping agent and 1mol of prepolymer end-capped by NCO groups in an ethyl acetate solution at the temperature of 30 ℃ to prepare a black material curing agent marked as A;
s3, according to the mass ratio, 20-80 parts of polyol, 1-2 parts of catalyst, 0.5-1 part of defoaming agent and 1-1.5 parts of water are stirred uniformly at the temperature of 60 ℃ to prepare a resin part, which is marked as B;
and S4, fully mixing and uniformly stirring the A and the B, adding the A and the B into a 65 ℃ mold, and carrying out a foaming reaction after 15min to grow the polyurethane foaming material.
2. the process for preparing a slow-speed aqueous polyurethane foam material according to claim 1, wherein the polyisocyanate is one or more of polymethylene polyphenyl isocyanate, toluene diisocyanate and diphenylmethane diisocyanate.
3. The process for preparing a slow-speed aqueous polyurethane foam material according to claim 1, wherein the polyol comprises polyether polyol and/or polyester polyol, the polyether polyol is polyether polyol with molecular weight of 1000, polyether polyol with molecular weight of 2000, polyether polyol with molecular weight of 6000 or polyether polyol with molecular weight of 100, and the polyester polyol is polyester polyol with molecular weight of 1400, polyester polyol with molecular weight of 1100, polyester polyol with molecular weight of 300 or polyester polyol with molecular weight of 200.
4. the preparation process of the slow-speed aqueous polyurethane foam material as claimed in claim 3, which comprises the following steps:
S1, reacting polyisocyanate with polyol to prepare NCO group terminated prepolymer;
s2, uniformly stirring 1.2mol of end-capping agent and 1mol of prepolymer end-capped by NCO groups in an ethyl acetate solution at the temperature of 30 ℃ to prepare a black material curing agent marked as A;
s3, according to the mass ratio, 20-30 parts of polyether polyol, 30-50 parts of polyester polyol, 1-2 parts of catalyst, 0.5-1 part of defoaming agent and 1-1.5 parts of water are stirred uniformly at the temperature of 60 ℃ to prepare a resin part, which is marked as B;
And S4, fully mixing and uniformly stirring the A and the B, adding the A and the B into a 65 ℃ mold, and carrying out a foaming reaction after 15min to grow the polyurethane foaming material.
5. The process for preparing a slow-acting aqueous polyurethane foam material according to claim 1, wherein the end-capping reagent is sodium bisulfite.
6. the process for preparing a slow-acting aqueous polyurethane foam material according to claim 1, wherein the catalyst is organic zinc.
7. the process for preparing a slow-speed aqueous polyurethane foam material according to claim 1, wherein the defoaming agent is dimethicone.
8. The foam material prepared by the process for preparing the slow-speed aqueous polyurethane foam material according to any one of claims 1 to 7.
CN201910787947.4A 2019-08-26 2019-08-26 Slow-speed waterborne polyurethane foam material and preparation process thereof Pending CN110551268A (en)

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Application publication date: 20191210