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High solid content vinyl acetate-ethylene copolymer emulsion and method for synthesizing the same

An ethylene copolymer and vinyl acetate technology, applied in the direction of monocarboxylate copolymer adhesive, adhesive type, etc., can solve the problem that there is no high-solid content VAE emulsion, cannot share borax and dextrin, technology and products It has achieved the effect of reducing the amount of recycled monomers, less product filter residue, and longer production cycle

Active Publication Date: 2008-06-18
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the 1970s, VAE emulsions developed rapidly and their properties continued to improve. The research on components affecting the emulsion polymerization system (such as initiators, emulsifiers, and protective colloids, etc.) was mainly carried out. Polyvinyl alcohol was used as the protective colloid system. , the prepared VAE emulsion has excellent viscosity, fast curing speed, strong adhesion to PVC film, but poor water resistance, and cannot be shared with borax and dextrin
At present, the main domestic products are general-purpose products, and there is no high-solid content VAE emulsion synthesis industrial production technology and products.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 1. Preparation of raw materials

[0036] 1) Preparation of surfactants

[0037] Add 35 parts of deionized water, 3 parts of protective colloid, 0.6 parts of emulsifier, 0.3 parts of ferrous sulfate, 0.2 parts of zinc formaldehyde sulfoxylate, 0.2 parts of potassium phosphate, and 1.0 part of n-dodecyl mercaptan in the surfactant tank , Stir at room temperature for 15-20min, then heat up to 80-90℃, fully dissolve, mix and use.

[0038] 2) Preparation of initiator solution

[0039] Add 10 parts of deionized water and 0.5 part of 35% hydrogen peroxide to the initiator tank, stir for 15 minutes, and prepare a 1.5-2.5% initiator solution for later use.

[0040] 3) Preparation of PH regulator

[0041] Add 8 parts of deionized water and 0.2 parts of sodium bicarbonate to the pH regulator tank, and stir them for later use.

[0042] 2. Feed production

[0043] Pump the prepared surfactant into the reaction vessel, start the circulating pump, add 42 parts of the initial monomer vinyl...

Embodiment 2

[0051] Take 55 parts of deionized water, 4 parts of protective colloid, 1.0 part of emulsifier, 0.5 part of ferrous sulfate, 0.4 part of formaldehyde sulfoxylate, 0.35 part of potassium phosphate, 1.0 part of 35% hydrogen peroxide, 0.5 part of sodium carbonate, and 75 part of vinyl acetate Part, 5 parts of N-methylol acrylamide, 25 parts of ethylene, 0.5 part of n-dodecane mercaptan, the method of Example 1 was used to prepare a high solid content VAE emulsion, and the result was the same as that of Example 1.

Embodiment 3

[0053] Take 45 parts of deionized water, 4 parts of protective colloid, 0.4 parts of emulsifier, 0.1 part of ferrous sulfate, 0.05 part of formaldehyde zinc sulfoxylate, 0.05 part of potassium phosphate, 0.2 part of 35% hydrogen peroxide, 0.1 part of sodium bicarbonate, 65 of vinyl acetate Parts, 4 parts of N-methylolacrylamide, 45 parts of ethylene, and 0.7 parts of n-dodecyl mercaptan. The high solid content VAE emulsion was prepared by the method of Example 1. The result was the same as that of Example 1.

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PUM

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Abstract

The present invention relates to high solid content vinyl acetate-ethylene copolymer latex for binder and the synthetic method, including 55 to 75 portion of vinyl acetate, 24 to 45 portion of ethylene, 3 to 5 portion of N-methylol acrylamide, 2 to 4 portion of PVA1788 and PVA0588, 0.4 to 1.0 portion of the compound of nonionic emulsifying agent nonyl phenol polyoxyethylene alkyl ether and anion emulsifying agent alkyl sulphate with 2:1 mixture ratio, 0.2 to 1.0 portion of 35 percents oxydol with 1:1 mixture ratio, 0.05 to 0.4 portion of formol zinc sulphate, 0.1 to 0.5 portion of ferrous sulphate, 0.5 to 1.0 portion of regular dodeca-carbon thiol-alcohol, 0.05 to 0.35 portion of potassium phosphate, 0.1 to 0.5 portion of sodium bicarbonate and 45 to 55 portion of de-ionized water. With the adoption of latex polymerization, low-residual monomer VAE latex with solid content more than 65 percents is synthesized, which is used as binder to be applied in timber processing industry and packaging industry.

Description

Technical field: [0001] The invention relates to a high-solid content vinyl acetate-ethylene copolymer emulsion (abbreviated as: VAE emulsion) for adhesives and a synthesis method, in particular to a high-solid content VAE emulsion for wood and packaging adhesives. Background technique: [0002] VAE emulsion is a binary or multiple copolymer polymer emulsion synthesized by emulsion polymerization with vinyl acetate and ethylene as the main monomers. Generally, the content of vinyl acetate is 70-90%, and the content of ethylene is 14-16%. Because the ethylene segment acts as an internal plasticizer in the copolymer, it reduces the glass transition temperature and film-forming temperature of the VAE emulsion, and gives the VAE emulsion many advantages, that is, good low-temperature performance, not easy to brittle, high bonding strength, and not easy Degumming occurs, the bonding speed is fast, and there is no pollution. VAE emulsion has good compatibility with many additives, whic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F218/08C08F2/24C08F210/02C08F220/58C09J131/04
Inventor 潘广勤王福善李红春李彤霞张耀亨齐永新张英杰刘秀兰
Owner BC P INC CHINA NAT PETROLEUM CORP
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