Steaming-resisting and solvent-free adhesive and preparation method thereof

A solvent-free, adhesive technology, applied in the direction of adhesive types, polyurea/polyurethane adhesives, adhesives, etc., can solve the problems of low initial adhesion and small molecular weight of the adhesive strength, and achieve improved initial adhesion , low viscosity, excellent coating properties

Inactive Publication Date: 2018-12-21
汪辉
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, resins with lower viscosity have lower molecular weight and therefore, lower bond strength, especially initial tack

Method used

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  • Steaming-resisting and solvent-free adhesive and preparation method thereof
  • Steaming-resisting and solvent-free adhesive and preparation method thereof
  • Steaming-resisting and solvent-free adhesive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A preparation method of a retort-resistant solvent-free adhesive is as follows:

[0034] (1) Weigh raw materials:

[0035] The isocyanate component comprises the following raw materials in parts by weight:

[0036] Isocyanate 120

[0037] Polyether polyol 30

[0038] castor oil 10

[0039] Curing agent component comprises the raw material of following weight portion:

[0040]

[0041] Wherein, the mass ratio of polyether diol to polyether triol in polyether polyol is 2:1.

[0042] (2) Preparation of isocyanate component:

[0043] Remove water from polyether polyol and castor oil at 0.09MPa, 110°C for 1 hour, cool down to 40°C, protect with nitrogen, add isocyanate and react at 75°C for 3 hours to obtain isocyanate component.

[0044] (3) Preparation of curing agent component:

[0045] Remove water from polyether polyols, castor oil, and alcohol amine compounds at 0.09MPa and 110°C for 1 hour, cool down to 75°C, protect with nitrogen, add epoxy resin, react for...

Embodiment 2-5

[0047] The preparation method process is the same as that of Example 1, and the consumption of raw materials is shown in Table 1.

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Abstract

The invention relates to a steaming-resisting and solvent-free adhesive. The steaming-resisting and solvent-free adhesive is prepared from an isocyanate component and a curing agent component. The adhesive provided by the invention is environmentally friendly and does not contain a solvent; meanwhile, the adhesive has low viscosity and good coating performance. Epoxy resin, castor oil and a certain amount of polyether triol are added so that the adhesion performance, the steaming-resisting performance and the coating performance of the adhesive are synchronously improved. The steaming-resisting and solvent-free adhesive is applicable to the fields of food package, medicine package and the like.

Description

technical field [0001] The invention relates to a retort-resistant solvent-free adhesive. The retort-resistant solvent-free adhesive of the invention is applicable to the fields of food packaging and pharmaceutical packaging. Background technique [0002] At present, in the field of flexible packaging lamination, solvent-free adhesives are widely used. Although there is no pollution problem caused by solvent volatilization, compared with solvent-based adhesives, since they do not contain solvents, their viscosity is relatively high. The performance is poor, and it is easy to cause appearance defects and quality problems in the actual production process. Therefore, in order to improve the coating performance of the solvent-free adhesive, a resin with a lower viscosity is usually selected as a raw material in the prior art. However, lower viscosity resins have lower molecular weights and therefore lower bond strength, especially initial tack. [0003] Therefore, how to ensur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/14C09J175/08C08G18/67C08G18/66C08G18/48C08G18/58
CPCC08G18/12C08G18/348C08G18/4812C08G18/6692C09J175/08C09J175/14C08G18/6541C08G18/58
Inventor 汪辉
Owner 汪辉
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