Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for producing polyester polyol

A polyester polyol and product technology, applied in the field of chemical production, can solve the problems of heavy odor and dark color of finished products, and achieve the effect of low odor, light color and wide application fields

Active Publication Date: 2012-12-19
南雄市三本化学科技有限公司
View PDF1 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, for polyester polyols of different molecular weights, aromatic hydrocarbon solvents such as xylene are mostly used in the production method, resulting in heavy odor and dark color of the finished product.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for producing polyester polyol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A polyester polyol of ethylene adipate having a hydroxyl value of about 226 mgKOH / g was prepared. Put 100kg of adipic acid and 61kg of ethylene glycol into the polyester reactor, heat up to 100 degrees, add 0.08kg of catalyst butyltin, continue to heat up, control the temperature of the distillate to be less than 94 degrees, and keep the temperature at 220 degrees. After the temperature of the distillate drops to 85 degrees, take a sample and observe it. If the material is uniform, add 6kg of aliphatic hydrocarbon with a boiling point of 110-130 degrees to reflux and test the acid value every two hours. When the acid value reaches the set value and is less than 2mgKOH / g , turn on the vacuum, increase the temperature to 230 degrees to extract the reflux solvent, and discharge the material when the temperature is lowered to 120 degrees. The Gardner color number of the product obtained is about 1#, and as adopting traditional methods such as xylene, the Gardner color numb...

Embodiment 2

[0019] A polyester polyol of 1,6-hexanediol adipate having a hydroxyl value of about 97 mgKOH / g was prepared. Put 100kg of adipic acid and 100kg of 1,6-hexanediol into the polyester reactor, raise the temperature to 100 degrees, add 0.08kg of catalyst butyltin, continue to raise the temperature, control the temperature of the distillate to be less than 94 degrees, and the material temperature is 220 degrees, Keep warm, wait until the temperature of the distillate drops to 85 degrees, take a sample and observe, if the material is uniform, add 6kg of 110-130 degrees boiling point aliphatic hydrocarbon reflux solvent to reflux, test the acid value every two hours, when the acid value reaches the set value less than 2mgKOH / g, turn on the vacuum, raise the temperature to 230 degrees to extract the reflux solvent, and discharge the material when the temperature is lowered to 120 degrees. The Gardner color number of the product obtained is about 0#, and as adopting traditional meth...

Embodiment 3

[0021] A polyester polyol of 1,6-hexanediol phthalate having a hydroxyl value of about 103 mgKOH / g was prepared. Put 100kg of phthalic anhydride and 100kg of 1,6-hexanediol into the polyester reactor, heat up to 100 degrees, add 0.08kg of catalyst butyltin, continue to heat up, control the temperature of the distillate to be less than 94 degrees, and keep the material temperature at 220 degrees. After the temperature of the distillate drops to 85 degrees, take a sample and observe it. If the material is uniform, add 6kg of aliphatic hydrocarbon with a boiling point of 130-150 degrees to reflux and test the acid value every two hours. When the acid value reaches the set value less than 2mgKOH / g , turn on the vacuum, increase the temperature to 230 degrees to extract the reflux solvent, and discharge the material when the temperature is lowered to 120 degrees. The Gardner color number of the product obtained is about 1#, and as adopting traditional methods such as xylene, the G...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Hydroxyl valueaaaaaaaaaa
Hydroxyl valueaaaaaaaaaa
Hydroxyl valueaaaaaaaaaa
Login to View More

Abstract

The invention provides a method for producing polyester polyol, which comprises the steps of: adding acid and alcohol according to the material quantity of the designed polyester polyol product; heating up to 80-120 DEG C, and then adding catalyst into the mixture of the acid and the alcohol; continuously heating, controlling the temperature of distillate not to exceed 90-100 DEG C, controlling the material temperature to be within the range of 210-230 DEG C, and carrying out heat preservation; after the temperature of the distillate is reduced to be lower than 80 DEG C, taking out reaction material for observation; if the reaction material is in a homogeneous state, adding reflux solvent for backflow; and when the acid value reaches the set index, extracting out the reflux solvent, cooling and discharging to obtain the polyester polyol product, wherein the reflux solvent is aliphatic hydrocarbon with the boiling point of 110-210 DEG C. The method can be used for producing various polyester polyols with different molecular weights in a common polyester reaction kettle, and is high in production efficiency; and the obtained product has small odor and solvent residue as well as shallow color, and can be used as raw material of paint, adhesive, engineering materials or raw materials of degradable materials, thus being wide in application field.

Description

technical field [0001] The invention relates to the technical field of chemical production, in particular to a method for producing polyester polyol in a polyester reactor. Background technique [0002] Polyester polyols are often formed by condensation (or transesterification) of organic dicarboxylic acids (anhydrides or esters) and polyols (including diols) or by polymerization of lactones and polyols. The dibasic acid includes phthalic acid or phthalic anhydride or its ester, adipic acid, halogenated phthalic acid and the like. Polyols include ethylene glycol, propylene glycol, diethylene glycol, trimethylolpropane, pentaerythritol, and the like. Different varieties of polyester polyols have different properties due to different types or different preparation processes. Several important indicators for polyester polyols are hydroxyl value, acid value, moisture, viscosity, molecular weight, density and chroma, etc. . Polyester polyurethane has more polar groups such as ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C08G63/81
Inventor 李瑞贤
Owner 南雄市三本化学科技有限公司
Features
  • Generate Ideas
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com