Starch glycosyl polyether glycol used for polyurethane rigid foam and preparation method thereof

A technology of polyether polyol and starch sugar, which is applied in the field of polyether polyol, can solve problems such as poor compatibility, and achieve the effects of high fluidity, low thermal conductivity, and excellent dimensional stability

Active Publication Date: 2012-06-20
江苏钟山新材料有限公司
View PDF6 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The blowing agent cyclopentane has no effect on the ozone layer, but its compatibility with the commonly used polyether polyols is poor

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1: the preparation of modified starch sugar

[0015] In a 1L pressure reactor, add 297g of starch sugar, then add 138g of glycerin and 0.1g of catalyst (boron trifluoride), control the temperature within the range of 120-160°C, and reduce the pressure to -0.095MPa to react for 2- 6h, during the reaction process, samples were taken at regular intervals, and the aldehyde value of the sample was measured according to the standard method. Stop the reaction when the aldehyde value of the analyzed reaction product is less than 0.05%. After separation, washing, temperature at 120-160°C, and decompression to -0.1MPa, low molecular weight is removed to obtain modified starch sugar.

[0016] Product control indicators: product appearance: colorless to brown transparent liquid; hydroxyl value (mgKOH / g): 1100; moisture: 0.15%; aldehyde value (%): 0.05; viscosity at 25°C, (cSt): 30000.

[0017]

Embodiment 2

[0019] Put 300g of modified starch sugar, 145g of behenic alcohol, 35g of diethylene glycol, and 2g of catalyst KOH into a 1L reactor, replace the reactor with nitrogen, vacuum dehydrate, heat up to 110°C, and vacuum strip gas for 2 hours, then Pass 600 g of PO (propylene oxide), control the reaction temperature at 90~140°C, and the pressure at 0.1~0.8MPa. After passing PO, the reaction is aged for 1.5hr, washed with water, neutralized, adsorbed with diatomaceous earth, dehydrated, The air is filtered with a blade filter to obtain the finished starch glycosyl polyether polyol.

[0020] Product indicators: Product appearance: colorless transparent liquid; hydroxyl value (mgKOH / g): 415; moisture: 0.05%; acid value (mgKOH / g): 0.05; ∑K + Na + ppm: 10; viscosity at 25°C, (cSt): 4500; density (gm / cc), 25°C: 1.0208.

[0021]

Embodiment 3

[0023] Put 240g of modified starch sugar, 160g of behenic alcohol, 50g of sucrose, and 1.87g of catalyst KOH into a 1L reactor. After replacing the reactor with nitrogen, vacuumize and dehydrate it. After raising the temperature to 110°C, vacuum lift gas for 2 hours, and then pass Add 550g of PO (propylene oxide), control the reaction temperature at 90~140°C, and the pressure at 0.1~0.8MPa. After the PO is passed through, the reaction is aged for 1.5hr, washed with water, neutralized with sulfuric acid, adsorbed with diatomaceous earth, dehydrated, The air is filtered with a blade filter to obtain the finished starch glycosyl polyether polyol.

[0024] Product indicators: Product appearance: colorless transparent liquid; hydroxyl value (mgKOH / g): 430; moisture: 0.05%; acid value (mgKOH / g): 0.05; ∑K + Na + ppm: 10; viscosity at 25°C, (cSt): 6500; density (gm / cc), 25°C: 1.0218.

[0025]

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
Login to view more

Abstract

The invention discloses a starch glycosyl polyether glycol, which has a higher molecular weight and is prepared from modified starch sugar, low molecular weight alcohols and propylene oxide. The molecular weight is within the range of 700 to 1200, the hydroxyl value (mg KOH/g) is 415 to 430, the viscosity (cSt, 25 DEG C) is 4500 to 6500, and density (gm/cc, 25 DEG C) is 1.0188 to 1.0218. The starch glycosyl polyether glycol has good compatibility with cyclopentane foaming agents. The polyurethane foam prepared with the starch glycosyl polyether glycol shows excellent dimensional stability, higher flowability and lower thermal conductivity. Besides, the application of the starch glycosyl polyether glycol can shorten curing time of the foam. The invention also discloses a preparation methodof the starch glycosyl polyether glycol.

Description

technical field [0001] The invention relates to polyether polyols, in particular to polyether polyols which are used to prepare rigid polyurethane foam and use starch sugar as a starting agent and a preparation method thereof. Background technique [0002] Since the advent of rigid polyurethane (PU) foam, rigid polyurethane foam has the characteristics of high strength, light weight, good heat insulation effect, and convenient construction. It has been widely used in many fields for more than 40 years, and its uses are roughly divided into two categories. One type is used as thermal insulation materials, such as rigid foam plastics in refrigerators, freezers, sandwich panels and insulation pipes; the other type is non-thermal insulation structural materials, such as making furniture, sports equipment, electrical casings, etc. In addition, there are also products that combine the above two functions. The raw material of rigid polyurethane foam is liquid, which can fill the ...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/28C08B31/10C08G18/48
Inventor 赵华头王新红杨佳伟陈玉娟申宝兵
Owner 江苏钟山新材料有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap