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Redispersible latex powder
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A technology of redispersible latex powder and emulsifier, applied in the field of latex powder, can solve problems such as poor redispersibility of redispersible latex powder
Active Publication Date: 2009-09-30
山西三维华邦集团有限公司
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Problems solved by technology
[0007] The present invention provides a redispersible latex powder in order to solve the problem of poor redispersibility of the redispersible latex powder existing in the prior art
Method used
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Embodiment 1
[0049] Embodiment 1, a kind of redispersible latex powder, comprises the raw material of following weight ratio,
[0050] 80 parts of polyvinyl acetate copolymer emulsion; 5 parts of polyvinyl alcohol; 10 parts of white carbon black; 5 parts of calcium carbonate.
[0051] White, free-flowing polymer powder formed after spray drying. It is mainly used for bonding gypsum, plastering gypsum and other non-cement-based dry-mixed mortars.
[0052] The polyvinyl acetate copolymer emulsion is composed of water 43%, polyvinyl alcohol 3.8%, emulsifier 0.65%, sodium acetate 0.05%, tartaric acid 0.08%, hydrogen peroxide 0.35%, vinyl acetate 35%, tertiary vinyl carbonate 17.07% % made, the emulsifier is sodium dodecylbenzene sulfonate or alkyl polyglycol ether.
[0053] First, add water to the dissolution tank, add polyvinyl alcohol into the dissolution tank to dissolve under stirring, prepare an aqueous solution, and add an emulsifier; then send the dissolved polyvinyl alcohol aqueous s...
Embodiment 2
[0054] Embodiment 2, a kind of redispersible latex powder, comprises the raw material of following weight ratio,
[0055] 60 parts of polyvinyl acetate copolymer emulsion; 20 parts of polyvinyl alcohol; 2 parts of white carbon black; 15 parts of calcium carbonate.
[0061] The preparation method is the same as in Example 1.
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Abstract
The invention relates to a latex powder, in particular to a redispersible latex powder. The problem of poor redispersibility of the redispersible latex powder existing in the prior art is solved. The following raw materials are included in the following weight proportions: 60-80 parts of polyvinyl acetate copolymer emulsion; 5-20 parts of polyvinyl alcohol; 2-10 parts of white carbon black; 5-15 parts of calcium carbonate. Compared with the same type of products at home and abroad, the technical indicators of the present invention, such as original strength, water resistance strength, temperature resistance strength and folding ratio, are greatly improved.
Description
technical field [0001] The invention relates to a latex powder, in particular to a redispersible latex powder. Background technique [0002] Redispersible latex powder is mainly used in dry cement mortar in the construction industry and is an important additive for dry cement mortar. It has a remarkable effect in dry cement mortar. It can improve the bond strength and cohesion of the material. Improve the elastic bending strength and flexural strength of the material. Improve the freeze-thaw resistance of the material. Improve the weather resistance, durability, wear resistance of the material. Improve the hydrophobicity of the material and reduce the water absorption. Improve workability and reduce material shrinkage. Can effectively prevent cracking. Improve bonding strength and cohesion, improve bending resistance and stretch resistance, improve impact resistance, improve hydrophobicity, reduce water absorption, improve wear resistance, durability, and improve free...
Claims
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Application Information
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