Loose anti-sticking high-performance polycarboxylic admixture as well as preparation method and application thereof

An anti-stick type polycarboxylic acid and admixture technology, which is applied in the field of loose and anti-stick type high-performance concrete admixtures, can solve the problems of poor bottom removal, poor flow performance, and increased viscosity, so as to reduce the viscosity and reduce the cost of raw materials. , Increase the effect of water retention space

Active Publication Date: 2014-09-10
上海新浦特种助剂有限公司
View PDF1 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of increased viscosity, bottoming and poor flow performance of polycarboxylate (PCE) admixtures in the prior art w

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
  • Loose anti-sticking high-performance polycarboxylic admixture as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-2

[0031] 1) In a 1000ml four-neck flask, add 380g of deionized water as the bottom water, add 95g of polymerized monomer (IV) and 5.2g of chain transfer agent sodium allyl sulfonate SAS, dissolve while stirring and heat up to 60~ 65°C.

[0032] 2) Add a mixture of 2.1 g of hydrogen peroxide (30%) and 10.5 g of pure water under nitrogen protection, and stir for 5 minutes.

[0033] 3) Start to drop the ester-based macromonomer MPEGMAA 148g and 210g of deionized water.

[0034] 4) At the same time drop by methacrylic acid 50g and EDTMP (embodiment 2 is the compound of PBTC) 5.5g composition.

[0035] 5) Add dropwise the initiator consisting of APS6.3g and deionized water 105g at the same time.

[0036] 6) Adding control The dropping time is 2 to 3 hours.

[0037] 7) Then add 0.5 g of acrylamide, a rheology adjusting assistant, at one time.

[0038] 8) Then heat-retain and react for 1 hour, and the temperature is controlled at 80-90°C.

[0039] 9) It is detected ...

Embodiment 3

[0041] 1) Add 600g of 60% HPEG to a 1000ml four-necked flask, and add 3.0g of SAS, dissolve while stirring and heat up to 50-55°C.

[0042] 2) Add APS 1.2g and stir for 10 minutes.

[0043] 3) A mixed solution consisting of 38 g of acrylic acid, 5 g of HEDP and 8.75 g of deionized water was added dropwise.

[0044] 4) Simultaneously dropwise add a mixed solution consisting of 95 g of AA-LS polymer and 150 g of deionized water.

[0045] 5) After the dropwise addition is completed, 0.5 g of APS is added for the second time, and the temperature is raised to 60°C.

[0046] 6) Add 3g of urea, keep warm for 1 hour, then cool to 40-45°C, adjust P with liquid caustic soda H 6 to 6.5 is enough.

[0047] 7) Measure the solid content and replenish water to adjust the solid content to 40%±0.5%.

Embodiment 4

[0049] 1) In a 1000ml four-neck flask, add 600g of 60% concentration of polyethylene glycol methacrylate MPEGMAA and 100g of 60% concentration of MPEGAA, and add SAS3.0g, dissolve and heat up to 50-55°C while stirring.

[0050] 2) Add APS 1.2g and stir for 10 minutes.

[0051] 3) Add acrylic acid dropwise 38g, HEDP5g and deionized water 8.75g.

[0052] 4) Simultaneously dropwise add a mixed solution consisting of 95 g of AA-LS polymer and 150 g of deionized water.

[0053] 5) After the dropwise addition is completed, 0.5 g of APS is added for the second time, and the temperature is raised to 60°C.

[0054] 6) Add 3g of urea, keep warm for 1 hour, then cool to 40-45°C, adjust P with liquid caustic soda H 6 to 6.5 is enough.

[0055] Measure the solid content and replenish water to adjust the solid content to 40% ± 0.5%.

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

No PUM Login to view more

Abstract

The invention discloses a high-performance concrete water reducer with loose anti-sticking performances. The loose anti-sticking high-performance polycarboxylic admixture is polycarboxylic high-performance water reducers capable of lowering concrete viscosity and regulating loose performance; by screening and regulating a proportion of PCE synthesis materials, nonconventional PCE synthesis materials are introduced; and the novel loose anti-sticking high-performance polycarboxylic water reducer is prepared from prepolymerization monomer of modified lignin and acrylic acid, an organic phosphonate compound capable of removing stickiness and resisting temperature, a rheological property regulator, and the like. Requirements of lowering stickiness, avoiding digging up, improving peaceability and divergence, and the like, are achieved while high-strength grade concrete is prepared, and therefore, better effect is achieved in practical application.

Description

technical field [0001] The invention relates to a loose and anti-adhesive high-performance concrete admixture, in particular to a polycarboxylate-based high-performance water reducer capable of adjusting and reducing the viscosity of fresh concrete and having loose performance and a preparation method thereof. Background technique [0002] Polycarboxylate high-performance water reducer is the third generation concrete superplasticizer at present. It has the advantages of high water reducing rate, low dosage, good workability, good work performance, and no pollution. Competing research and development for the majority of scientific research institutions and production enterprises. With C 60 ~C 100 High-strength concrete is increasingly being widely used in the construction industry and infrastructure facilities, and the requirements for concrete admixtures are also increasing. Especially in a wide range of application fields, how to adapt to the requirements of high-strengt...

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): C08F290/06C08F220/06C08F220/56C08F291/06C04B24/26C04B103/30
Inventor 苏莹
Owner 上海新浦特种助剂有限公司
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