CN112159513A - Preparation method of ultrahigh-density polyurethane flexible foam - Google Patents

Preparation method of ultrahigh-density polyurethane flexible foam Download PDF

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Publication number
CN112159513A
CN112159513A CN202011079689.3A CN202011079689A CN112159513A CN 112159513 A CN112159513 A CN 112159513A CN 202011079689 A CN202011079689 A CN 202011079689A CN 112159513 A CN112159513 A CN 112159513A
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Prior art keywords
tdi
mixing
parts
polyether polyol
preparation
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CN202011079689.3A
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CN112159513B (en
Inventor
徐进
王德秋
梁睿渊
卢主枫
马瑞进
李晓明
马亮
李虎邦
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Gansu Yinguang Juyin Chemical Industry Co Ltd
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Gansu Yinguang Juyin Chemical Industry 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
    • C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
    • C08G18/72—Polyisocyanates or polyisothiocyanates
    • C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
    • C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
    • C08G18/7614—Polyisocyanates or polyisothiocyanates cyclic aromatic containing only one aromatic ring
    • 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
    • C08G18/4804—Two or more polyethers of different physical or chemical nature
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/10—Process efficiency

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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 relates to a preparation method of ultrahigh-density polyurethane flexible foam, which is characterized by comprising the following steps: the adhesive is prepared by mixing and reacting the following components in parts by mass: 100 portions of polyether glycol, 115 portions of TDI-9013-15 portions, 0.5-0.6 portion of water, 1.2-1.3 portions of silicone oil, 0.2-0.25 portion of stannous octoate and 330.3-0.35 portion of amine catalyst A, and the concrete steps are as follows: and sequentially adding the materials except the TDI into a mixing barrel, uniformly mixing and stirring, standing for 3-5 min, pouring the TDI-90 into the mixing barrel, controlling the temperature to be 25-30 ℃, quickly stirring for 5-8 s, pouring into a foaming box for foaming, curing and cutting. The preparation method is simple, the materials are easy to obtain, the common silicone oil and TDI-90 can realize ultrahigh density, no special auxiliary agent is needed, the industrial popularization is easy, and the production cost is reduced.

Description

Preparation method of ultrahigh-density polyurethane flexible foam
Technical Field
The invention belongs to the technical field of chemical industry, and particularly relates to a preparation method of an ultrahigh-density polyurethane flexible foam.
Background
The polyurethane flexible foam is flexible polyurethane foam plastic with certain elasticity, and is a polyurethane product with the largest usage amount in polyurethane products. According to the difference of the hardness and softness, namely the load-bearing performance, the polyurethane flexible foam can be divided into common flexible foam, super-flexible foam, high-bearing flexible foam, super-light flexible foam and the like. According to the different production processes, the polyurethane soft foam can be divided into block-shaped soft foam and molding soft foam, the block-shaped soft foam is a foam product which is produced by a continuous process and then cut into a required shape, and the molding soft foam is a foam product which is directly mixed by a gap process and then injected into a mold to be foamed into a required shape. The polyurethane soft foam is mainly of an open pore structure, has the performances of low density, good elastic recovery, sound absorption, ventilation, heat preservation and the like, is mainly used as cushion materials of furniture, mattresses, seats and cushions of vehicles and the like, and is also used as a filtering material, a sound insulation material, a shockproof material, a decorative material, a packaging material, a heat insulation material and the like in industry and civil use. The cushion material, such as a seat, a sofa, a mattress and the like, is an ideal cushion material, and is also an application field with the largest consumption of the soft foam; the sound absorbing material, namely the polyurethane flexible foam with the holes has good sound absorbing and shock absorbing functions and can be used as an indoor sound insulating material; fabric composite material-shoulder pad, bra sponge, cosmetic cotton, toy, etc.
The ultra-high density polyurethane flexible foam has high density, is widely applied to the fields of shoe materials and the like, but has high production cost because the foam has high open cell rate and is greatly influenced by local air pressure, raw materials and the like and generally needs to be realized by adopting special silicone oil, catalysts and the like.
Disclosure of Invention
The invention aims to avoid the defects of the prior art and provides a preparation method of an ultrahigh-density polyurethane flexible foam.
In order to achieve the purpose, the invention adopts the technical scheme that: a preparation method of ultra-high density polyurethane flexible foam is characterized in that: the adhesive is prepared by mixing and reacting the following components in parts by mass: 100 portions of polyether glycol, 115 portions of TDI-9013 portions to 15 portions, 0.5 portion to 0.6 portion of water, 1.2 portion to 1.3 portions of silicone oil, 0.2 portion to 0.25 portion of stannous octoate, and 330.3 portions to 0.35 portion of amine catalyst A;
the method comprises the following specific steps:
and sequentially adding the materials except the TDI into a mixing barrel, uniformly mixing and stirring the materials by using a stirrer, standing the mixture for 3-5 min, pouring the TDI-90 into the mixing barrel, controlling the temperature to be 25-30 ℃, starting timing, quickly stirring the mixture for 5-8 s, pouring the mixture into a foaming box for foaming, curing and cutting the mixture into required sizes.
The mixing and stirring time is 25 s-30 s, and the rotating speed of the stirrer is controlled to be 3000 rad/min.
The TDI-90 is toluene diisocyanate with the content of 2 and 4 bodies being more than 90 percent.
The polyether polyol is polyether polyol with a hydroxyl value of 56 mgKOH/g and a hydroxyl value of 21 mgKOH/g
And mixing the polyols according to the mass ratio of 2:1 to obtain the mixed polyether polyol.
The reaction principle of the invention is as follows:
(1) the reaction of TDI with water first produces an unstable carbamic acid, which then decomposes into carbon dioxide and an amine. If the TDI is in excess, the reaction may continue to form a substituted urea.
Figure 882733DEST_PATH_IMAGE002
The invention has the beneficial effects that: the preparation method is simple, the materials are easy to obtain, the common silicone oil and TDI-90 can realize ultrahigh density, no special auxiliary agent is needed, the industrial popularization is easy, and the production cost is reduced.
Detailed Description
The principles and features of this invention are described in conjunction with the following examples, which are set forth to illustrate, but are not to be construed to limit the scope of the invention.
Example 1 preparation of an ultra-high Density polyurethane Flexible foamThe preparation method comprises the following steps: sequentially adding the materials except TDI in the table I into a mixing barrel, mixing and stirring for 27s by using a stirrer, controlling the rotating speed of the stirrer to be 3000rad/min, standing for 3min, then pouring toluene diisocyanate with 2 and 4 body content of 90% into the mixing barrel, controlling the temperature to be 25 ℃, starting timing, quickly stirring for 5s, pouring the mixed materials into a foaming box for foaming, reacting for 147s, and cutting into required sizes after curing. The detected soft bubble density is 156g/cm3。
Example 2, a method for preparing an ultra-high density polyurethane flexible foam: sequentially adding the materials except TDI in the table I into a mixing barrel, mixing and stirring for 25s by using a stirrer, controlling the rotating speed of the stirrer to be 3000rad/min, standing for 4min, pouring toluene diisocyanate with 2 and 4 body contents of 95% into the mixing barrel, controlling the temperature to be 30 ℃, starting timing, quickly stirring for 7s, pouring the mixed materials into a foaming box for foaming, reacting for 125s, and cutting into required sizes after curing. The detected soft bubble density is 178g/cm3。
Example 3, a method of preparing an ultra-high density polyurethane flexible foam: sequentially adding the materials except TDI in the table I into a mixing barrel, mixing and stirring for 30s by a stirrer, controlling the rotating speed of the stirrer to be 3000rad/min, standing for 5min, pouring toluene diisocyanate with the 2 and 4 body content of 98 percent into the mixing barrel, controlling the temperature to be 28 ℃, starting timing, quickly stirring for 8s, pouring the mixed materials into a foaming box for foaming, reacting for 139s, and cutting the mixed materials into required sizes after curing. The detected soft bubble density is 165g/cm3。
Table (one):
Figure DEST_PATH_IMAGE004

Claims (4)

1. a preparation method of ultra-high density polyurethane flexible foam is characterized in that: the adhesive is prepared by mixing and reacting the following components in parts by mass:
polyether polyol 100-115 parts
TDI-9013-15 parts
0.5 to 0.6 portion of water
1.2-1.3 parts of silicone oil
0.2 to 0.25 portion of stannous octoate
Amine catalyst A-330.3-0.35 parts
The method comprises the following specific steps:
and sequentially adding the materials except the TDI into a mixing barrel, uniformly mixing and stirring the materials by using a stirrer, standing the mixture for 3-5 min, pouring the TDI-90 into the mixing barrel, controlling the temperature to be 25-30 ℃, starting timing, quickly stirring the mixture for 5-8 s, pouring the mixture into a foaming box for foaming, curing and cutting the mixture into required sizes.
2. The method of claim 1, wherein the method comprises the following steps: the mixing and stirring time is 25 s-30 s, and the rotating speed of the stirrer is controlled to be 3000 rad/min.
3. The method of claim 1, wherein the method comprises the following steps: the TDI-90 is toluene diisocyanate with the content of 2 and 4 bodies being more than 90 percent.
4. The method of claim 1, wherein the method comprises the following steps: the polyether polyol is mixed polyether polyol obtained by mixing polyether polyol with a hydroxyl value of 56 mgKOH/g and polyether polyol with a hydroxyl value of 21 mgKOH/g according to the mass ratio of 2: 1.
CN202011079689.3A 2020-10-11 2020-10-11 Preparation method of ultrahigh-density polyurethane flexible foam Active CN112159513B (en)

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07330850A (en) * 1994-06-13 1995-12-19 Mitsubishi Kagaku Dow Kk Production of non-rigid polyurethane foam
CN1244543A (en) * 1998-08-12 2000-02-16 天津石油化工公司研究所 Preparation of high-density super soft foamed polyurethane
JP2002322235A (en) * 2001-04-24 2002-11-08 Nippon Polyurethane Ind Co Ltd Method for producing soft polyurethane foam
JP2003026749A (en) * 2001-07-23 2003-01-29 Nippon Polyurethane Ind Co Ltd Method for manufacturing flexible polyurethane foam
JP2003147044A (en) * 2001-11-16 2003-05-21 Nippon Polyurethane Ind Co Ltd Method for producing flexible polyurethane foam
CN102492114A (en) * 2011-12-14 2012-06-13 浙江川洋海绵有限公司 Flexible polyurethane foam and production process
CN109251298A (en) * 2017-07-12 2019-01-22 董伟 Milk bottle brush polyurethane sponge and preparation method thereof
CN111040123A (en) * 2019-12-23 2020-04-21 荆晓东 Preparation method of polyurethane filter sponge

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07330850A (en) * 1994-06-13 1995-12-19 Mitsubishi Kagaku Dow Kk Production of non-rigid polyurethane foam
CN1244543A (en) * 1998-08-12 2000-02-16 天津石油化工公司研究所 Preparation of high-density super soft foamed polyurethane
JP2002322235A (en) * 2001-04-24 2002-11-08 Nippon Polyurethane Ind Co Ltd Method for producing soft polyurethane foam
JP2003026749A (en) * 2001-07-23 2003-01-29 Nippon Polyurethane Ind Co Ltd Method for manufacturing flexible polyurethane foam
JP2003147044A (en) * 2001-11-16 2003-05-21 Nippon Polyurethane Ind Co Ltd Method for producing flexible polyurethane foam
CN102492114A (en) * 2011-12-14 2012-06-13 浙江川洋海绵有限公司 Flexible polyurethane foam and production process
CN109251298A (en) * 2017-07-12 2019-01-22 董伟 Milk bottle brush polyurethane sponge and preparation method thereof
CN111040123A (en) * 2019-12-23 2020-04-21 荆晓东 Preparation method of polyurethane filter sponge

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
SCHIFFAUER, R等: ""Mathematical property prediction models for flexible polyurethane foams - A comparison between conventional slabstock, high resilience slabstock and high resilience molded foams"", 《JOURNAL OF CELLULAR PLASTICS》 *
张锋，等: ""全水发泡中高密度超软聚氨酯泡沫的制备"", 《聚氨酯工业》 *

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