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

Unsaturated polyether alcohol and polycarboxylate water reducer prepared by same

An unsaturated polyether alcohol technology, applied in the field of polyether synthesis, can solve the problems of complex preparation process, high energy consumption, and large pollution, and achieve the effects of mild reaction conditions, improved slump retention performance, and improved early strength

Inactive Publication Date: 2016-04-13
NANJING HONGBAOLI POLYURETHANE
View PDF8 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, a large amount of solvents are used in the preparation process of unsaturated polyether alcohol, the preparation process is complicated, the pollution is large, and the energy consumption is high.

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
  • Unsaturated polyether alcohol and polycarboxylate water reducer prepared by same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Add 116.1g of N-methallylamine to a 10L reactor, replace with nitrogen twice, raise the temperature to 70-90°C, add 118.6g of propylene oxide continuously, control the reaction pressure at 0.10-0.30MPa, and the pressure drops to Degas after 0.0Mpa; press 1.5g of catalyst B-1 into the reactor with nitrogen, raise the temperature to 105-110°C, add ethylene oxide continuously, control the reaction pressure at 0.10-0.40MPa, and add 6305.0g of epoxy in total Ethane, after the aging pressure is reduced to 0.0MPa, degassed, the temperature is lowered to 90-100°C and filtered to obtain nitrogen-containing unsaturated polyether alcohol.

[0035] Indexes: hydroxyl value: 14.0 mgKOH / g, degree of unsaturation: 0.246 mmol / g, double bond retention rate: 98.5%, molecular weight distribution coefficient D=1.03.

Embodiment 2

[0037] Add 144.2g of allylamine to the 10L reactor 1, replace with nitrogen twice, raise the temperature to 75-90°C, add 1,2-epoxybutane continuously, a total of 145.5g, control the reaction pressure at 0.1-0.2MPa, Degassing after the aging pressure drops to 0.0MPa; press 1.0g of catalyst B-1 into the reactor with nitrogen, raise the temperature to 100-110°C, add ethylene oxide continuously, control the reaction pressure at 0.10-0.30MPa, the total Add 6480.5g of ethylene oxide, after aging the pressure drops to 0.0MPa, degas, cool to 85-95°C and filter to obtain nitrogen-containing unsaturated polyether alcohol.

[0038] Indicators: hydroxyl value: 42.1 mgKOH / g, degree of unsaturation: 0.372 mmol / g, double bond retention rate: 99.5%, molecular weight distribution coefficient D=1.05.

Embodiment 3

[0040] Add 86.3g of diallylamine to the 10L reactor 1, replace with nitrogen twice, raise the temperature to 70-85°C, add propylene oxide continuously, control the reaction pressure at 0.15-0.3MPa, a total of 87.0g of propylene oxide, through Degas after the aging pressure drops to 0.0MPa; pressurize 0.43g of catalyst B-1 into the reactor with nitrogen, raise the temperature to 100-110°C, add ethylene oxide continuously, control the reaction pressure at 0.10-0.40MPa, a total of 3883.5 g ethylene oxide, after aging the pressure is reduced to 0.0MPa, degassed, cooled to 85-90°C and filtered to obtain nitrogen-containing unsaturated polyether alcohol.

[0041] Indexes: hydroxyl value: 13.1 mgKOH / g, degree of unsaturation: 0.435 mmol / g, double bond retention rate: 99.3%, molecular weight distribution coefficient D=1.02.

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 relates to an unsaturated polyether alcohol. A method comprises: adding unsaturated amine into a reactor, after nitrogen gas replacement, continuously adding epoxy olefin, at reaction pressure of 0.001-1.0MPa and reaction temperature of 40-120 DEG C, after charging, performing curing and degassing treatment, pressing phosphonitrile catalyst into the reactor by nitrogen gas, charging the nitrogen gas after vacuumizing, continuously charging epoxy ethylene oxide at reaction pressure of 0.001-1.0MPa and reaction temperature of 40-120 DEG C, after charging, performing the curing and degassing treatment, cooling and filtering to obtain the unsaturated polyether alcohol. The unsaturated polyether alcohol has a comb structure and an amino functional group, a polycarboxylate water reducer prepared by the unsaturated polyether alcohol is improved by 30 percent or more than 30 percent in early strength and 10 percent or more than 10 percent in collapsing retention.

Description

technical field [0001] The invention relates to an unsaturated polyether alcohol and belongs to the technical field of polyether synthesis. Background technique [0002] Polycarboxylate superplasticizer is prepared by reaction of acrylic acid and unsaturated polyether alcohol as main raw materials. Because of its environmental friendliness and excellent slump retention, it has gradually become the main development direction of the water reducing agent industry. [0003] The early strength of concrete can be improved by adding early strength agent to water reducer. The early strength agent generally contains more inorganic salts, a large amount will cause corrosion to the steel bar, and a small amount will not achieve the early strength effect. Therefore, it is a trend in the development of superplasticizers to improve the early strength performance of superplasticizers without using early strength agents. [0004] Patent CN107355946A prepares double branched allylamine po...

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): C08G65/26C08F283/06C04B24/26C04B103/30
CPCC08G65/2624C04B24/2605C04B2103/302C08F283/065C08G65/2675
Inventor 黄东平邢益辉范春元魏斌
Owner NANJING HONGBAOLI POLYURETHANE
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com