CN105885030A - Method for preparing low molecular weight distribution polyether - Google Patents
Method for preparing low molecular weight distribution polyether Download PDFInfo
- Publication number
- CN105885030A CN105885030A CN201610490668.8A CN201610490668A CN105885030A CN 105885030 A CN105885030 A CN 105885030A CN 201610490668 A CN201610490668 A CN 201610490668A CN 105885030 A CN105885030 A CN 105885030A
- Authority
- CN
- China
- Prior art keywords
- low molecular
- molecular weight
- polyether
- weight distribution
- distribution
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- C08G65/00—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
- C08G65/02—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring
- C08G65/26—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring from cyclic ethers and other compounds
- C08G65/2603—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring from cyclic ethers and other compounds the other compounds containing oxygen
- C08G65/2606—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring from cyclic ethers and other compounds the other compounds containing oxygen containing hydroxyl groups
-
- 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
- C08G65/00—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
- C08G65/02—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring
- C08G65/26—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring from cyclic ethers and other compounds
- C08G65/2642—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring from cyclic ethers and other compounds characterised by the catalyst used
- C08G65/2645—Metals or compounds thereof, e.g. salts
- C08G65/2663—Metal cyanide catalysts, i.e. DMC's
-
- 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
- C08G2101/00—Manufacture of cellular products
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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)
- Toxicology (AREA)
- Polyethers (AREA)
Abstract
The invention discloses a method for preparing low molecular weight distribution polyether. The low molecular weight distribution polyether is prepared from the following raw materials: 8-10 parts of low molecular weight distribution polyether, Propylene oxide, lithium carbonate and 0.005% of a DMC catalyst. The method comprises the following steps: feeding the low molecular weight distribution polyether and the lithium carbonate into a reactor, dehydrating with nitrogen at 115-120 DEG C, after the moisture is qualified, adding the DMC catalyst, introducing epoxypropane, after epoxypropane is added, stirring for 1-3 hours to enable the system to react sufficiently, vacuuming, and cooling, thereby preparing the low molecular weight distribution polyether. By adopting the method, the use amount of the catalyst is small, the monomer conversion rate is high, and polymerization can be relatively stable.
Description
Technical field
The invention belongs to the preparation method of organic high molecular compound, specifically with a kind of new catalyst (DMC)
Replace the preparation method of the distribution of low molecular weight polyethers of original base catalyst.
Background technology
Along with updating of PPG production technology, the quality of product is also improving constantly, but conventional polyether
Industrialized production is always based on anionic catalytic ring-opening polymerisation, and in product, monohydroxy content of polyether is high, and molecular weight distribution is wider,
Double bond content is higher, affects the mechanical and physical performance of polyurethane product.When polyol molecular weight increases, isomerization becomes particularly
Significantly.There is presently no and be well solved.
Summary of the invention
It is an object of the invention to provide the preparation method of a kind of distribution of low molecular weight polyethers, use poly-ammonia prepared by this polyethers
Ester foam can reduce the consumption of TDI, makes the elasticity of foam and comfortableness be improved.
It is an object of the invention to be achieved through the following technical solutions:
A kind of preparation method of distribution of low molecular weight polyethers, it is characterised in that: the method is with low molecular polyether as initiator；
Dmc catalyst；Prepare with expoxy propane ring-opening polymerization；Comprise the steps:
1) preparing raw material, raw material weight number is low molecular polyether (molecular weight 800) 8-10；Dmc catalyst 0.04 ‰-
0.05‰；Expoxy propane 80-90；Lithium carbonate 0.01 ‰-0.03 ‰；
2) low molecular polyether, lithium carbonate are put in reactor；Then taken off by nitrogen stream at a temperature of 115-120 DEG C
Water, after moisture content is qualified, adds dmc catalyst, is passed through expoxy propane, after expoxy propane adds end, stirs 1-3 hour, make body
System's fully reaction, then vacuumizes, and prepares distribution of low molecular weight polyethers after cooling.
Moisture content is qualified refers to that moisture content mass fraction is less than 0.05%.
The distribution of low molecular weight polyethers that above-mentioned preparation method prepares is applied in polyurethane foam.
Distribution of low molecular weight polyethers prepared by the present invention causes PO ring-opening polymerisation, synthesis by using DMC complex catalyst
Molecule is regular good, steady quality, and cost performance is high, and preparation polyurethane foam can reduce the consumption of TDI, and makes the bullet of foam
Property and comfortableness are improved.
Catalyst amount of the present invention is little, and monomer conversion is high, is polymerized more stable.
Detailed description of the invention
Below by specific embodiment, the present invention is further illustrated, but each embodiment is not the tool to the present invention
Body limits.
Embodiment 1
The preparation method of a kind of distribution of low molecular weight polyethers, with low molecular polyether as initiator；Dmc catalyst；With epoxy third
Prepared by alkane ring-opening polymerization.Comprise the steps:
1. raw material weight number: low molecular polyether (self-control, molecular weight 800) 8；Dmc catalyst 0.05 ‰ (the permanent auspicious public affairs in Huayin
Department)；Expoxy propane 90(Jiangsu You Lide Chemical Co., Ltd.).Lithium carbonate 0.01 ‰ (Shanghai is than outstanding company).
2. low molecular polyether, lithium carbonate are put in reactor, then by nitrogen stream at a temperature of 115-120 DEG C
Dehydration, after moisture content is qualified (moisture content is qualified refers to that moisture content mass fraction is less than 0.05%), adds dmc catalyst, is passed through epoxy third
Alkane, after expoxy propane adds end, stirs 1-3 hour, makes system fully react, then vacuumize, and prepares low molecule after cooling
Amount distribution polyethers.
Embodiment 2
The preparation method of a kind of distribution of low molecular weight polyethers, with low molecular polyether as initiator；Dmc catalyst；With epoxy third
Prepared by alkane ring-opening polymerization.Comprise the steps:
1. raw material weight number: low molecular polyether (self-control, molecular weight 800) 10；Dmc catalyst 0.04 ‰ (the permanent auspicious public affairs in Huayin
Department)；Expoxy propane 90(Jiangsu You Lide Chemical Co., Ltd.).Lithium carbonate 0.02 ‰ (Shanghai is than outstanding company).
2. low molecular polyether, lithium carbonate are put in reactor, then by nitrogen stream at a temperature of 115-120 DEG C
Dehydration, after moisture content is qualified, adds dmc catalyst, is passed through expoxy propane, after expoxy propane adds end, stirs 1-3 hour, make
System is fully reacted, and then vacuumizes, and prepares polyethers after cooling.
Embodiment 3
The application of the distribution of low molecular weight polyethers that above-mentioned preparation method prepares, takes polyether polyol for polyurethane foam 100 parts, silicon
Oil 2 parts, triethylene diamine catalyst 0.2 part, 3 parts of water, isocyanates 110 parts, high-speed stirred mixing post-foaming prepares polyurethane
Foamed product.
Claims (3)
1. the preparation method of a distribution of low molecular weight polyethers, it is characterised in that: the method is with low molecular polyether as initiator；
Dmc catalyst；Prepare with expoxy propane ring-opening polymerization；Comprise the steps:
1) preparing raw material, raw material weight number is low molecular polyether 8-10；Dmc catalyst 0.04 ‰-0.05 ‰；Expoxy propane
80-90；Lithium carbonate 0.01 ‰-0.03 ‰；
2) low molecular polyether, lithium carbonate are put in reactor；Then taken off by nitrogen stream at a temperature of 115-120 DEG C
Water, after moisture content is qualified, adds dmc catalyst, is passed through expoxy propane, after expoxy propane adds end, stirs 1-3 hour, make body
System's fully reaction, then vacuumizes, and prepares distribution of low molecular weight polyethers after cooling.
The preparation method of distribution of low molecular weight polyethers the most according to claim 1, it is characterised in that: moisture content is qualified refers to water
Part mass fraction is less than 0.05%.
The preparation method of distribution of low molecular weight polyethers the most according to claim 1, it is characterised in that: low molecular polyether
Molecular weight 800.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610490668.8A CN105885030A (en) | 2016-06-29 | 2016-06-29 | Method for preparing low molecular weight distribution polyether |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610490668.8A CN105885030A (en) | 2016-06-29 | 2016-06-29 | Method for preparing low molecular weight distribution polyether |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105885030A true CN105885030A (en) | 2016-08-24 |
Family
ID=56719440
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610490668.8A Pending CN105885030A (en) | 2016-06-29 | 2016-06-29 | Method for preparing low molecular weight distribution polyether |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105885030A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112480390A (en) * | 2020-11-30 | 2021-03-12 | 广东聚航新材料研究院有限公司 | Antistatic agent for dicyclopentadiene resin and preparation method thereof |
| CN114456345A (en) * | 2022-01-17 | 2022-05-10 | 江苏斯德瑞克化工有限公司 | Flame-retardant polyether polyol and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101108896A (en) * | 2006-07-20 | 2008-01-23 | 拜尔材料科学有限公司 | High water content tolerant process for the production of polyethers |
| CN101967226A (en) * | 2010-09-28 | 2011-02-09 | 山东蓝星东大化工有限责任公司 | Method for synthesizing high-activity high molecular weight polyether polyalcohol |
| CN102574999A (en) * | 2009-09-17 | 2012-07-11 | 旭硝子株式会社 | Polyether preparation method |
| CN103360595A (en) * | 2013-06-26 | 2013-10-23 | 淮安巴德聚氨酯科技有限公司 | Method for shortening induction time during catalysis of ring opening polymerization of epoxide in discontinuous method |
| CN103694465A (en) * | 2013-11-25 | 2014-04-02 | 黎明化工研究设计院有限责任公司 | Continuous synthesis method of polyether |
-
2016
- 2016-06-29 CN CN201610490668.8A patent/CN105885030A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101108896A (en) * | 2006-07-20 | 2008-01-23 | 拜尔材料科学有限公司 | High water content tolerant process for the production of polyethers |
| CN102574999A (en) * | 2009-09-17 | 2012-07-11 | 旭硝子株式会社 | Polyether preparation method |
| CN101967226A (en) * | 2010-09-28 | 2011-02-09 | 山东蓝星东大化工有限责任公司 | Method for synthesizing high-activity high molecular weight polyether polyalcohol |
| CN103360595A (en) * | 2013-06-26 | 2013-10-23 | 淮安巴德聚氨酯科技有限公司 | Method for shortening induction time during catalysis of ring opening polymerization of epoxide in discontinuous method |
| CN103694465A (en) * | 2013-11-25 | 2014-04-02 | 黎明化工研究设计院有限责任公司 | Continuous synthesis method of polyether |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112480390A (en) * | 2020-11-30 | 2021-03-12 | 广东聚航新材料研究院有限公司 | Antistatic agent for dicyclopentadiene resin and preparation method thereof |
| CN112480390B (en) * | 2020-11-30 | 2023-05-09 | 广东聚航新材料研究院有限公司 | Antistatic agent for dicyclopentadiene resin and preparation method thereof |
| CN114456345A (en) * | 2022-01-17 | 2022-05-10 | 江苏斯德瑞克化工有限公司 | Flame-retardant polyether polyol and preparation method thereof |
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Application publication date: 20160824 |
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