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Dual-component binder and preparation thereof

An adhesive, two-component technology, applied in the direction of monocarboxylate copolymer adhesive, adhesive type, unsaturated alcohol copolymer adhesive, etc., can solve the problem of slow curing speed and high production cost of adhesive problems, to achieve the effect of fast curing speed, cost reduction, and damage prevention

Active Publication Date: 2009-07-08
JINAN SHENGQUAN GROUP SHARE HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For this reason, the technical problem to be solved by the present invention is: to overcome the disadvantages of slow adhesive curing speed and high production cost in the prior art

Method used

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  • Dual-component binder and preparation thereof
  • Dual-component binder and preparation thereof
  • Dual-component binder and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] The preparation process of the two-component adhesive in the present invention includes a preparation step of the first component and a preparation step of the second component.

[0057] The preparation steps of the first component include:

[0058] a) Rectification step: First put 20-50 parts of all vinyl acetate into the stirring tank, heat up to reflux at 60-70 °C, the distilled out is vinyl acetate, and the high-boiler comes out of the kettle, including a large amount of polymerization inhibitor . The reflux time is 2-4 hours, and when the reflux velocity is significantly reduced or the temperature in the kettle is significantly increased and is greater than or equal to 85° C., the rectification process ends.

[0059] b) Polymerization step: at 40-60°C, use methanol to dissolve ammonium persulfate and diacyl peroxide to form an initiator alcohol solution for use, wherein the ratio of ammonium persulfate and diacyl peroxide by weight is 1:1.

[0060] Vinyl acetate...

Embodiment 2

[0095] In this example, the preparation steps of the two-component adhesive are the same as in Example 1, only the parts by weight of the raw materials required for the preparation of the first component and the second component are changed.

[0096] In the first component,

[0097] Taking the polyvinyl acetate latex as a whole, the parts by weight of each raw material required in the preparation process are respectively:

[0098] 50 parts of vinyl acetate;

[0099] 5 parts of ethyl acetate;

[0100] Acrylate 10 parts;

[0101] 5 parts of methacrylate;

[0102] 5 parts of isooctyl acrylate;

[0103] 35 parts of methanol;

[0104] 1.3 parts of ammonium persulfate and diacyl peroxide mixture (ratio by weight and number is 1:1);

[0105] Taking the refractory powder as a whole, among them:

[0106] 30 parts of talcum powder;

[0107] 35 parts of quartz powder;

[0108] Clay 4 parts.

[0109] In the first component, taking the first component as a whole, the polyvinyl ac...

Embodiment 3

[0122] In this example, the preparation steps of the two-component adhesive are the same as in Example 1, only the parts by weight of the raw materials required for the preparation of the first component and the second component are changed.

[0123] In the first component,

[0124] Taking the polyvinyl acetate latex as a whole, the parts by weight of each raw material required in the preparation process are respectively:

[0125] 25 parts of vinyl acetate;

[0126] 3 parts of ethyl acetate;

[0127] Acrylate 2 parts;

[0128] 1 part of methacrylate;

[0129] 1 part of isooctyl acrylate;

[0130] 20 parts of methanol;

[0131] 0.5 parts of ammonium persulfate and diacyl peroxide mixture (ratio by weight and number is 1:1);

[0132] Taking the refractory powder as a whole, among them:

[0133] 30 parts of talcum powder;

[0134] 20 parts of quartz powder;

[0135] Clay 2 parts.

[0136] In the first component, taking the first component as a whole, the polyvinyl aceta...

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Abstract

The invention relates to a bicomponent adhesive, which comprises a first component with the viscosity of between 800 and 2,000 centipoises and a second component with the viscosity of between 6,000 and 15,000 centipoises; the weight portion ratio of the first component to the second component is between 0.5-1 and 10-1, wherein the first component mainly comprises polyvinyl acetate latex and refractory powder; the first component is taken as a whole; the weight portion of the polyvinyl acetate latex is between 35 and 65; the weight portion of the refractory powder is between 40 and 70; vinyl acetate and carboxylic ester in an alcoholic solvent are subjected to evocation and polymerization through a chemical evocating agent to form the polyvinyl acetate latex; and the second component is formed through the mixing of amylopectin, the alcoholic solvent and an emulsifier. The invention also provides a method for preparing the bicomponent adhesive. The prepared bicomponent adhesive has the advantages of high strength, hydrolytic resistance, rapid curing speed, and the like.

Description

technical field [0001] The invention belongs to the field of adhesives, and in particular relates to a two-component adhesive used in the field of casting. Background technique [0002] At present, polyvinyl acetate latex is a commonly used emulsion adhesive, which has the advantages of fast curing speed, high bonding strength, low cost, and environmental friendliness. It is widely used in many aspects of casting, construction, and daily life. In the process of rapid repair of sand molds, it is necessary for the adhesive to have the properties of fast curing speed and high bonding strength. However, it can be seen from the molecular structural formula of vinyl acetate that it has the dual properties of olefins and esters. During the polymerization reaction to generate polyvinyl acetate latex, free radical polymerization and alkaline hydrolysis can occur, resulting in such The binder has defects such as poor water resistance and cold resistance, and the commonly used polyvin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J131/04C09J103/14C09J129/04
Inventor 祝建勋赵秀娟
Owner JINAN SHENGQUAN GROUP SHARE HLDG
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