Unlock instant, AI-driven research and patent intelligence for your innovation.

Compound water-repellent gypsum additive

A technology of waterproofing agent and gypsum, applied in the field of gypsum composite waterproofing agent, can solve the problems of narrow application range, poor waterproof performance, instability, etc., and achieve the effect of reducing solubility and enhancing waterproof performance.

Inactive Publication Date: 2012-07-04
UNIV OF JINAN
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The invention provides a gypsum composite waterproofing agent to solve the problems of poor waterproof performance, instability and narrow application range of gypsum products in the prior art

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

[0021] Dissolve 10 parts of paraffin and 3 parts of polyvinyl alcohol in 100 parts of water at a temperature of 100°C, add 0.3 parts of a composite anionic surfactant with an HLB value of 8 as an emulsifier, and emulsify into paraffin-polyvinyl alcohol under high-speed stirring conditions Emulsion is made into component A of gypsum composite waterproofing agent; 5 parts of 320-mesh alunite powder and 20 parts of 320-mesh slag micropowder are used to make component B of gypsum composite waterproofing agent.

[0022] From the gypsum composite waterproofing agent prepared above, take 50 grams of component A, 30 grams of component B, 650 grams of water, and 1,000 grams of gypsum powder and stir it in a JS-195A mortar mixer for 2 minutes. The gypsum is uniform and has good fluidity. The slurry was injected into a triple mold of 40×40×160mm and formed by vibration, and demolded after 1 hour of molding.

Embodiment 2

[0024] Dissolve 40 parts of paraffin wax and 5 parts of polyvinyl alcohol in 200 parts of water at a temperature of 95°C, add 2 parts of a complex anionic surfactant with an HLB value of 9 as an emulsifier, 2 parts of sodium sulfate, and 0.1 part of methyl cellulose , emulsified into paraffin-polyvinyl alcohol emulsion under high-speed stirring conditions to make component A of gypsum composite waterproofing agent; take 8 parts of 320-mesh alum stone powder and 40 parts of 320-mesh slag fine powder to make component B of gypsum composite waterproofing agent.

[0025] From the gypsum composite waterproofing agent made above, get A component 35 grams, B component 60 grams, water 650 grams, gypsum powder 1000 grams, with the method molding of embodiment 1, demoulding.

Embodiment 3

[0027] Dissolve 15 parts of paraffin wax and 8 parts of polyvinyl alcohol in 150 parts of water at a temperature of 95°C, add 0.8 parts of a complex anionic surfactant with an HLB value of 8 as an emulsifier, 1 part of sodium sulfate, and 0.2 parts of methylcellulose , emulsified into paraffin-polyvinyl alcohol emulsion under high-speed stirring conditions to make component A of gypsum composite waterproofing agent; take 7 parts of 320-mesh alum stone powder and 35 parts of 320-mesh slag fine powder to make component B of gypsum composite waterproofing agent.

[0028] From the gypsum composite waterproofing agent made above, get A component 50 grams, B component 60 grams, water 650 grams, gypsum powder 1000 grams, with the method molding of embodiment 1, demoulding.

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 relates to a compound water-repellent gypsum additive, comprising a component A and a component B, with weight ratio of 1-5:2-6; the component A is paraffin / polyvinyl alcohol emulsion which is prepared by stirring and emulsifying the paraffin, polyvinyl alcohol, water and emulsifiers at high speed based on the weight ratio of 5-40:2-8:100-200:0.25-2; sodium sulfate, methyl celluloseand other auxiliary agents can be added to the above mixture; the weight ratio of the paraffin, sodium sulfate and methyl cellulose addition is 5-40:1-2:0.1-0.2; the component B is an inorganic salt water-repellent additive which is prepared by mixing alunite powder and slag powder based on the weight ratio of 5-8:20-40. The compound water-repellent gypsum additive prepared by the invention is free from toxicity and irritation and even in distribution, and effectively improves the water-repellent property of gypsum.

Description

technical field [0001] The invention relates to a gypsum composite waterproofing agent, in particular to a gypsum composite waterproofing agent capable of imparting better waterproof performance to products made from gypsum slurry, such as gypsum boards or gypsum wallboards, and belongs to the technical field of waterproof building materials. Background technique [0002] The use of gypsum to make wall materials has the advantages of wide source of raw materials, low energy consumption for material production, and good process performance. But gypsum also has its own weaknesses, the most prominent weakness is the poor water resistance of its products. The main reason is: [0003] (1) During the stirring process of the gypsum slurry, the amount of water that is much higher than the amount required for the theoretical conversion of hemihydrate gypsum into dihydrate gypsum is mixed. After the gypsum slurry is hardened, the excess water will escape from the hardened body , res...

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 Patents(China)
IPC IPC(8): C09K3/18
CPCC04B2103/65C04B40/0039Y02W30/91C04B18/141C04B22/147C04B22/148C04B24/2623C04B24/36C04B24/383C04B28/14C04B2103/402
Inventor 李国忠陈娟柏玉婷于洋高子栋刘民荣
Owner UNIV OF JINAN