Preparation method of attapulgite/aqueous polyurethane compound binder

A technology of water-based polyurethane and composite adhesives, applied in the direction of polyurea/polyurethane adhesives, adhesive types, non-polymer adhesive additives, etc., to achieve the effect of improving mechanical properties and excellent performance

Active Publication Date: 2010-07-07
溧阳常大技术转移中心有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But this emulsion has a small

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0027] Example 1: Add 21.85g of PBA-2000 and 1.6g of DMPA into a three-necked flask, mix and stir after melting, and vacuumize at 90°C for 1 hour, with a vacuum degree of 0.1MPa. Then cool down to 70°C and add 1.9gNMP, 5.89gTDI and 0.1g catalyst (dibutyltin dilaurate) in sequence, R=1.15, and start to drop the mixed solution (0.005gAIBN dissolved in 1.5g acetone and 1.5g HEA) at the same time, and heat in a water bath The reaction was completed dropwise within 4 hours, and then a mixed solution of 1.5g acetone and 0.005g AIBN was added dropwise for 1 hour, and the temperature began to drop. Cool the prepolymer to 50°C and dilute it with acetone (3g). After the viscosity decreases, add 1.2g of triethylamine to neutralize it for 30 minutes to form a salt. After the phase transition is basically completed. Add 103g of attapulgite suspension (4% attapulgite content) for emulsification under high-speed stirring, and then add 0.65g of chain extender ethylenediamine, and further chai...

Embodiment 2

[0028] Embodiment 2: under embodiment 1 operating conditions, with the 103g attapulgite suspension in embodiment 1 (attapulgite content 4% is changed into 52g attapulgite suspension (attapulgite content 6%)); Obtain beige emulsion ( Solid content 40%).

Embodiment 3

[0029] Embodiment 3: under embodiment 1 operating conditions, the attapulgite emulsion is changed into the attapulgite suspension after KH550 modification, and the attapulgite suspension is changed into 140g (attapulgite content is changed into 10%), and beige yellow emulsion ( Solid content 20%).

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Abstract

The invention relates to a preparation method of an attapulgite/aqueous polyurethane compound binder, belonging to the field of organic binders and comprising the following steps of: (1) modified polyurethane prepolymer preparation: vacuumizing hydroxy monomers and hydrophilic monomers at the temperature of 90 DEG C under the vacuum degree of 0.09-0.1MPa, then adding metric isocyanate monomers on the basis of regulating the prepolymerizing temperature to 65-90 DEG C, and controlling the R value at 1.02-2.0; (2) prepolymer neutralization and dispersion: lowering uniform temperature by 40-70 DEG C on the basis of the first step, and adding a neutralizer to neutralize into salt; after 30 minutes, controlling the solid content at 20-40 percent; dispersing metric attapulgite suspension into salt-formation modified polyurethane prepolymer and stirring at high speed for 30 minutes to prepare an attapulgite/aqueous polyurethane compound emulsion; and (3) chain extension stage: adding an chain extender on the basis of the second step, and continuously stirring for 30 minutes and discharging to prepare a final product of the emulsion of the attapulgite/aqueous polyurethane compound binder. The compound binder can be made into an artificial board which has excellent performance and meets the environmental protection requirements.

Description

technical field [0001] The invention belongs to the field of organic adhesives, and relates to a preparation method of an attapulgite / water-based polyurethane composite adhesive. Background technique [0002] Water-based polyurethane (PU) uses water as the dispersion medium. It has the advantages of non-toxic, non-polluting, non-combustible, and environmentally friendly. It is a "green material" with broad application prospects and has become a research hotspot for researchers. According to the form of use, it can be divided into two types: one-component and two-component. One-component water-based polyurethane is a water-based polyurethane that can be used directly or without a cross-linking agent to obtain the required performance; if it cannot be used alone to obtain the required performance, a cross-linking agent must be added, or the general one-component water-based polyurethane can be added A cross-linking agent can improve the adhesion performance. In these cases, t...

Claims

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Application Information

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IPC IPC(8): C09J175/04C09J175/12C09J11/04
Inventor 杜郢高山姚超周太炎
Owner 溧阳常大技术转移中心有限公司
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