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Monocomponent polyurethane adhesive and preparation method and use thereof

A polyurethane adhesive, a single-component technology, applied in the direction of chemical instruments and methods, layered products, lamination, etc., can solve the problems of low shrinkage, high hardness, poor compatibility, etc. Lower temperature and lower raw material cost

Inactive Publication Date: 2009-12-02
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high functionality of castor oil, the polyurethane adhesive synthesized from highly reactive isocyanate and castor oil has high crosslinking density, high hardness, poor flexibility and low shrinkage rate. When the polystyrene foam board composite board is bonded, due to the poor compatibility of the polystyrene interface, the bonding strength to the two-phase interface is low.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Preparation of dehydrated castor oil with low hydroxyl value: Add industrial grade castor oil, catalyst p-aminobenzene sulfonic acid and zinc sulfate and reducing agent 2,6-di-tert-butyl-4-methylphenol, castor oil, p- The mass ratio of aminobenzenesulfonic acid, zinc sulfate and 2,6-di-tert-butyl-4-methylphenol is 100:0.4:0.3:0.05. After fully stirring, heat up and vacuum, and the degree of vacuum is controlled at -0.095 MPa, the temperature is maintained at 140°C, catalytic dehydration and vacuum distillation for 120min, cooling and discharging, the hydroxyl value is 124mgKOH / g.

[0055] Preparation of one-component polyurethane adhesive: In the reactor, add 100 parts by mass of polyphenyl polymethylene polyisocyanate and 35 parts by mass of toluene diisocyanate in sequence, stir, and then add the hydroxyl value of 124mgKOH / g dehydrated castor oil 135 Parts by mass, 25 parts by mass of industrial-grade refined castor oil, 25 parts by mass of trimethylolpropane-propylene ox...

Embodiment 2

[0057] Preparation of low hydroxyl value dehydrated castor oil: Add industrial grade castor oil, catalyst p-aminobenzenesulfonic acid and zinc sulfate, and reducing agent 2,6-di-tert-butyl-4-methylphenol, castor oil, p-amino acid in the reactor The mass ratio of benzenesulfonic acid, zinc sulfate and 2,6-di-tert-butyl-4-methylphenol is 100:0.6:0.4:0.09. Stir thoroughly, heat up and vacuum, and control the vacuum to -0.1MPa. The temperature is maintained at 150℃, catalytic dehydration and vacuum distillation for 120min, cooling and discharging. The hydroxyl value is 128 mgKOH / g.

[0058] Preparation of one-component polyurethane adhesive: In the reactor, first add 100 parts by mass of polyphenyl polymethylene polyisocyanate and 40 parts by mass of toluene diisocyanate, stir, and then add dehydrated castor oil with a hydroxyl value of 128 mgKOH / g 140 parts by mass, 25 parts by mass of industrial grade dehydrated castor oil, 25 parts by mass of trimethylolpropane-propylene oxide poly...

Embodiment 3

[0060] Preparation of low-hydroxyl value dehydrated castor oil: Add industrial grade castor oil, catalyst p-aminobenzene sulfonic acid and zinc sulfate, reducing agent 2,6-di-tert-butyl-4-methylphenol, castor oil, p-aminobenzene sulfonic acid and zinc sulfate into the reactor in sequence. The mass ratio of aminobenzenesulfonic acid, zinc sulfate and 2,6-di-tert-butyl-4-methylphenol is 100:0.3:0.2:0.03. After fully stirring, heat up and vacuum, and the degree of vacuum is controlled at -0.09 MPa, the temperature is maintained at 130°C, catalytic dehydration and vacuum distillation for 120min, cooling and discharging, the hydroxyl value is measured to be 121mgKOH / g.

[0061] Preparation of one-component polyurethane adhesive: In the reactor, add 100 parts by mass of polyphenyl polymethylene polyisocyanate and 30 parts by mass of toluene diisocyanate in sequence, stir, and then add the hydroxyl value of 121mgKOH / g dehydrated castor oil 130 Parts by mass, 25 parts by mass of industria...

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Abstract

The invention relates to a one-component polyurethane adhesive and its preparation method and application, belonging to the technical field of chemical adhesives. Low hydroxyl value dehydrated castor oil and polyphenyl polymethylene polyisocyanate are used as main raw materials to mix with toluene diisocyanate, refined castor oil, trimethylolpropane-propylene oxide polyether triol, and stannous octoate, triethylene glycol Diamine and N,N-dimethylbenzylamine are used as composite catalysts, and 4-tert-butylcatechol is used as an antioxidant to react at 50-60°C. The single-component polyurethane adhesive of the present invention is used for bonding color steel plates and polystyrene foam boards. It is a castor oil type single-component polyurethane adhesive. High strength and low raw material cost.

Description

Technical field [0001] The invention relates to a single-component polyurethane adhesive and a preparation method and application thereof, belonging to the technical field of chemical adhesives, in particular to a castor oil type single-component used for bonding color steel plates and polystyrene foam boards Polyurethane adhesive and its preparation method. Background technique [0002] Two layers of color steel plates are used as the surface layer and polystyrene foam plate is used as the core layer. The composite plate is obtained by bonding the polystyrene foam plate and the color steel plate with an adhesive through an automatic continuous molding machine or an intermittent process route. , Because it has the characteristics of light weight, heat insulation, sound insulation, waterproof, earthquake resistance, fire resistance, long life, maintenance-free, beautiful appearance, and one-time construction, it is widely used in industrial and civil buildings, warehouses, special...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/06C08G18/12C08G18/18C08G18/24C08G18/32C09J175/04B32B37/12
Inventor 王志玲王元秀张书香杨秀利
Owner UNIV OF JINAN