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Redispersible latex powder

A technology of redispersible latex powder and copolymerized emulsion, which is applied in the field of latex powder and can solve the problems of poor redispersibility of redispersible latex powder

Active Publication Date: 2008-02-20
山西三维华邦集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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Examples

Experimental program
Comparison scheme
Effect test

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 43% water, 3.8% polyvinyl alcohol, 0.65% emulsifier, 0.05% sodium acetate, 0.08% tartaric acid, 0.35% hydrogen peroxide, 35% vinyl acetate, and 17.07% polyvinyl acetate. % made, the emulsifier is sodium dodecylbenzene sulfonate or alkyl polyglycol ether.

[0053] First, add water to the dissolution tank, add polyvinyl alcohol to the dissolution tank under stirring to dissolve, prepare an aqueous solution, and add an emulsifier; then send the dissolved polyvinyl alcohol aqueous solut...

Embodiment 2

[0054] Example 2, a redispersible latex powder, comprising the following raw materials in the weight ratio, 60 parts of polyvinyl acetate copolymer emulsion; 20 parts of polyvinyl alcohol; 2 parts of white carbon black; 15 parts of calcium carbonate. Polyvinyl acetate copolymer emulsion is composed of water 53%, polyvinyl alcohol 3.2%, emulsifier 0.4%, sodium acetate 0.03%, tartaric acid 0.06%, hydrogen peroxide 0.25%, vinyl acetate 25%, vinyl tertiary carbonate 18.06% % made, the emulsifier is sodium dodecylbenzene sulfonate, alkyl polyglycol ether.

[0055] The preparation method is the same as in Example 1.

Embodiment 3

[0056] Embodiment 3, a kind of redispersibility latex powder, comprises the raw material of following weight ratio,

[0057] 70 parts of polyvinyl acetate copolymer emulsion; 10 parts of polyvinyl alcohol; 6 parts of white carbon black; 10 parts of calcium carbonate.

[0058] Polyvinyl acetate copolymer emulsion is composed of 50.59% water, 3.5% polyvinyl alcohol, 0.5% emulsifier, 0.04% sodium acetate, 0.07% tartaric acid, 0.3% hydrogen peroxide, 30% vinyl acetate, 15% vinyl tertiary carbonate % made, the emulsifier is sodium dodecylbenzene sulfonate, alkyl polyglycol ether.

[0059] 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, solving the problems of poor redispersiblity of the redispersible latex powder in the prior art and comprising the raw materials based on a proportioning ratio by weight: polyvinyl acetate copolymer emulsion 60-80 portions, polyvinyl alcohol 5-20 portions, silica hydrated 2-10 portions and calcium carbonate 5-15 portions. Compared with the same type products in China, the invention greatly promotes the technic indexes of original strength, water-proof, temperature resistance, folding ratio, etc.

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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Patent Type & Authority Applications(China)
IPC IPC(8): C08L31/04C08K3/36C08J3/12C08L29/04C08L83/00C08K3/26
Inventor 荆秀娟任谦
Owner 山西三维华邦集团有限公司
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