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Monocomponent polyurethane adhesive and preparation method and use thereof

A polyurethane adhesive, a single-component technology, applied in polyurea/polyurethane adhesives, adhesives, chemical instruments and methods, etc., can solve the problems of high hardness, low shrinkage, poor flexibility, etc., and reduce the reaction temperature , shortened reaction time, and high bonding strength

Inactive Publication Date: 2008-03-12
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 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- 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 vacuumize, and the vacuum degree is controlled at -0.095 MPa, the temperature was maintained at 140°C, catalytic dehydration and vacuum distillation for 120min, cooling and discharging, the hydroxyl value was measured to be 124mgKOH / g.

[0055] Preparation of one-component polyurethane adhesive: In a reaction kettle, sequentially add 100 parts by mass of polyphenyl polymethylene polyisocyanate and 35 parts by mass of toluene diisocyanate, stir, and then add 135 parts by weight of dehydrated castor oil with a hydroxyl value of 124 mgKOH / g Parts by mass, 25 parts by mass of industrial-grade refined castor oil, 25 par...

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 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 well, heat up and vacuumize, and the vacuum degree is controlled at -0.1MPa, The temperature was maintained at 150°C, catalytic dehydration and vacuum distillation for 120min, cooling and discharging. Its hydroxyl value was measured to be 128mgKOH / g.

[0058] Preparation of one-component polyurethane adhesive: In a reaction kettle, 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-pro...

Embodiment 3

[0060] Preparation of low hydroxyl value dehydrated castor oil: Add industrial grade castor oil, catalyst p-aminobenzenesulfonic acid and zinc sulfate, 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 100:0.3:0.2:0.03, after fully stirring, heat up and vacuumize, and the vacuum degree is controlled at -0.09 MPa, the temperature was maintained at 130°C, catalytic dehydration and vacuum distillation for 120min, cooling and discharging, the hydroxyl value was measured to be 121mgKOH / g.

[0061] Preparation of one-component polyurethane adhesive: In a reaction kettle, sequentially add 100 parts by mass of polyphenyl polymethylene polyisocyanate and 30 parts by mass of toluene diisocyanate, stir, and then add 130 parts by mass of dehydrated castor oil with a hydroxyl value of 121 mgKOH / g Parts by mass, 25 parts by mass of industrial-grade refined castor oil, 25 parts by ...

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PUM

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Abstract

The invention relates to a single-component polyurethane binder and a preparing method and application of the binder, and pertains to the technical field of chemical binder. The binder is got by the following procedures: mixing low-hydroxyl-value dehydrated castor oil and polyaryl polymethylene isocyanate as main raw materials with toluene diisocyanate, refined castor oil, and trimethylolpropane-oxypropylene polyether troil; using stannous octanoate, triethylenediamine and N, N-dimethylbenzylamine as complexing catalyst, and 4-tert-butyl-catechol as antioxidant, and allowing them reacting under 50-60 DEG C. The single-component polyurethane binder is for binding color steel sheets and polystyrene foam sheets, is a castor oil type single-component polyurethane binder; the curing flexibility is good, and the contraction rate is high; the binder is of high binding strength for two interfacing surfaces, and is of low cost in term of raw materials.

Description

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

Claims

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Application Information

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IPC IPC(8): C09J175/04B32B37/12
Inventor 王志玲王元秀张书香杨秀利
Owner UNIV OF JINAN
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