Anti-cracking formaldehyde-free benzene-free gypsum

A technology of gypsum and formaldehyde, which is applied in the field of crack-resistant formaldehyde-free and benzene-free gypsum, which can solve the problems of serious staining on the decoration wall and affect the health of the body, and achieve the effect of good construction workability, not easy to hollow, and not easy to crack

Inactive Publication Date: 2020-11-27
无醛饰界装饰产业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Plastering gypsum is a new type of plastering material for the bottom layer of indoor walls made of gypsum, washed sand, calcium carbonate and various organic additives, that is, "leveling mortar", which is suitable for plastering the bottom layer of concrete, aerated concrete, and brick-mixed mortar However, the content of formaldehyde, benzene, VOC and other harmful substances that seriously affect the health of the existing ordinary gypsum exceeds the standard, resulting in serious staining of the decoration wall and affecting health

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A crack-resistant formaldehyde-free and benzene-free gypsum is made from the following raw materials in the weight ratio: 500kg of gypsum, 500kg of fine sand, 2.5kg of MC, 0.8kg of retarder, 5kg of glutinous rice glue powder and 0.5kg of starch ether.

[0024] A preparation method for crack-resistant formaldehyde-free and benzene-free gypsum, comprising the following steps:

[0025] 1) Put 500kg of gypsum and 500kg of fine sand into the mixer, start the mixer, and stir for 15 minutes at a speed of 40r / min, so that the gypsum and fine sand are evenly mixed;

[0026] 2) Add 5 kg of glutinous rice glue powder and 0.5 kg of starch ether in sequence in step 1), start the mixer, and continue to stir at a speed of 30 r / min for 10 minutes, so that the materials in the mixer are evenly mixed;

[0027] 3) Add 2.5kg of MC and 0.8kg of retarder in step 2) successively, start the mixer again, adjust the speed of the mixer to 20r / min, and continue stirring for 20min to obtain the gyp...

Embodiment 2

[0031] A crack-resistant formaldehyde-free and benzene-free gypsum is made from the following raw materials in the weight ratio: 450kg of gypsum, 550kg of fine sand, 3kg of MC, 1.8kg of retarder, 8kg of glutinous rice glue powder and 0.8kg of starch ether.

[0032] A preparation method for crack-resistant formaldehyde-free and benzene-free gypsum, comprising the following steps:

[0033] 1) Put 450kg of gypsum and 550kg of fine sand into the mixer, start the mixer, and stir for 10 minutes at a speed of 30r / min, so that the gypsum and fine sand are evenly mixed;

[0034] 2) In step 1), add 8 kg of glutinous rice glue powder and 0.8 kg of starch ether in turn, start the mixer, and continue to stir at a speed of 40 r / min for 15 minutes, so that the materials in the mixer are mixed evenly;

[0035] 3) Add 3 kg of MC and 1.8 kg of retarder in step 2) successively, start the mixer again, adjust the speed of the mixer to 30r / min, continue stirring for 30min, and obtain the gypsum mat...

Embodiment 3

[0039] A crack-resistant formaldehyde-free and benzene-free gypsum is made from the following raw materials in the weight ratio: gypsum 480kg, fine sand 530kg, MC 2.8kg, retarder 1.4kg, glutinous rice glue powder 6.5kg and starch ether 0.65kg.

[0040] A preparation method for crack-resistant formaldehyde-free and benzene-free gypsum, comprising the following steps:

[0041] 1) Put 480kg of gypsum and 530kg of fine sand into the mixer, start the mixer, and stir for 12min at a speed of 35r / min, so that the gypsum and fine sand are evenly mixed;

[0042] 2) Add 6.5kg of glutinous rice glue powder and 0.65kg of starch ether in sequence in step 1), start the mixer, and continue to stir at a speed of 35r / min for 13min, so that the materials in the mixer are evenly mixed;

[0043] 3) Add MC 2.8kg and retarder 1.4kg successively in step 2), start the mixer again, adjust the speed of the mixer to 25r / min, and continue stirring for 25min to obtain the gypsum material and set aside;

...

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PUM

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Abstract

The invention discloses anti-cracking formaldehyde-free benzene-free gypsum. The gypsum is prepared from the following raw materials by weight: 450 to 500 kg of gypsum, 500 to 550 kg of fine sand, 2.5to 3 kg of MC, 0.8 to 1.8 kg of a retarder, 5 to 8 kg of glutinous rice glue powder and 0.5 to 0.8 kg of starch ether. The gypsum is formaldehyde-free, benzene-free, VOC-free and odorless, has the advantages of early strength, rapid hardening, light weight, heat preservation, heat insulation, fire resistance and sound insulation of building gypsum, also has the characteristics of good construction workability, high bonding strength, difficulty in hollowing and cracking, also has a breathing function, can adjust the air humidity and improve the living room environment, and is healthy, green and environment-friendly.

Description

technical field [0001] The invention relates to a crack-resistant formaldehyde-free and benzene-free gypsum. Background technique [0002] The main chemical composition of gypsum is calcium sulfate (CaSO4) hydrate, which is a monoclinic mineral. Gypsum is a widely used industrial material and building material. The microporous structure and heating dehydration of its products make it have excellent sound insulation, heat insulation and fireproof performance. It can be used in cement retarder, gypsum building products, model making , medical food additives, sulfuric acid production, paper fillers, paint fillers, etc. Plastering gypsum is a new type of plastering material for the bottom layer of indoor walls made of gypsum, washed sand, calcium carbonate and various organic additives, that is, "leveling mortar", which is suitable for plastering the bottom layer of concrete, aerated concrete, and brick-mixed mortar However, the content of formaldehyde, benzene, VOC and other ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14E04F13/04
CPCC04B28/14C04B2111/00025E04F13/04C04B14/06C04B2103/22C04B24/38C04B24/383
Inventor 李志军许宪云
Owner 无醛饰界装饰产业有限公司
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