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Preparation method of high-performance low-viscosity glue for low-viscosity PET (polyethylene terephthalate) protective film

A protective film, high-performance technology, used in adhesives, adhesive types, polyurea/polyurethane adhesives, etc., can solve the problems of unstable viscosity, residual glue, high temperature resistance, etc., to reduce the degree of crosslinking , reducing activity, good effect of high temperature resistance

Active Publication Date: 2018-11-23
NINGBO KELAIEN NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the development of society and the improvement of people's needs, the demand for protective films of foam materials is gradually increasing. and viscous instability

Method used

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  • Preparation method of high-performance low-viscosity glue for low-viscosity PET (polyethylene terephthalate) protective film

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preparation example Construction

[0025] The chain extender plays an important role in the preparation of high-performance low-viscosity adhesives. The chain extender is acidic, and the acidic substance can inhibit the formation reaction of biuret, thereby inhibiting the cross-linking reaction, thereby reducing the degree of cross-linking and reducing the viscosity.

[0026] As a preferred solution, the salt-forming agent is preferably one or more of triethylamine, NaOH, KOH and ammonia water. The organic solvent is preferably one or more of acetone, butanone, N-methylpyrrolidone and N,N-dimethylformamide.

[0027] As a preferred version, the catalyst is prepared according to the following method: stir and heat methylimidazole and ethyl bromide with a molar ratio of 1:1 under the condition of 450-750r / min and heat up to 50-80°C for 6-18h, then use The catalyst was obtained by washing with ethyl acetate several times.

[0028] The catalyst plays a role in promoting the preparation of high-performance low-visco...

Embodiment 1

[0037] The low-viscosity PET protective film for foam materials of the present invention consists of a 50 μm PET base layer, a 5 μm low-viscosity intermediate layer, and a 20 μm protective layer.

[0038] The low-viscosity intermediate layer is formed by high-performance low-viscosity adhesive, which consists of 20 parts by weight of macromolecular polyol polyether polyol, 3 parts by weight of isocyanate toluene diisocyanate, 2 parts by weight of chain extender, and 0.5 parts by weight of salt Agent triethylamine, 4 parts by weight of catalyst, 10 parts by weight of organic solvent acetone and 100 parts by weight of deionized water, the specific preparation method is as follows:

[0039] (1) Vacuum dehydrate the macromolecular polyol at 100°C for 5 hours, then cool to 60°C;

[0040] (2) Add isocyanate, organic solvent and catalyst, and react at a constant temperature for 6 hours under the condition of 500r / min;

[0041] (3) Then add a chain extender for chain extension reaction...

Embodiment 2

[0049] The low-viscosity PET protective film for foam materials of the present invention consists of a 100 μm PET base layer, a 10 μm low-viscosity intermediate layer, and a 50 μm protective layer.

[0050] The low-viscosity middle layer is formed by high-performance low-viscosity adhesive, which is composed of 80 parts by weight of macromolecular polyol polyester polyol, 5 parts by weight of isocyanate 4,4'-diphenylmethane diisocyanate, 3 parts by weight of expanded Chain agent, 0.5-2 parts by weight of salt-forming agent ammonia water, 4-10 parts by weight of catalyst, 10 parts by weight of organic solvent N-methylpyrrolidone and 100 parts by weight of deionized water, the specific preparation method is as follows:

[0051] (1) Vacuum dehydrate the macromolecular polyol at 120°C for 2 hours, then cool to 80°C;

[0052] (2) Add isocyanate, organic solvent and catalyst, and react at a constant temperature for 2 hours under the condition of 1500r / min;

[0053] (3) Then add a c...

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Abstract

The invention provides a preparation method of high-performance low-viscosity glue for a low-viscosity PET protective film. The preparation method comprises the steps that macromolecular polyhydric alcohol is subjected to vacuum dehydration for 1-5 hours at the temperature of 100-120 DEG C, and then cooled to be 60-80 DEG C; isocyanate, an organic solvent and a catalyst are added, the mixture is subjected to thermostatic reaction for 2-6 hours under the condition of 500-1500 r / min; a chain extender is added to conduct chain extension reaction for 1-5 hours, and the product is cooled to be 30-50 DEG C; and a salt-forming agent and deionized water are added, high-speed shearing dispersing is conducted for 0.5-2 hours under the condition of 1000-3000 r / min, and the high-performance low-viscosity glue is obtained. The preparation technology is simple and easy to operate, and is suitable for industrialized production. The high-performance low-viscosity glue produced by adopting the method is applied to the PET protective film, so that the PET protective film has the characteristics of being low in viscosity, easy to tear, free of glue residue, good in adhesion, good in high temperatureresistance and excellent in mechanical performance.

Description

technical field [0001] The invention relates to the technical field of protective films, in particular to a method for preparing a high-performance low-viscosity adhesive for a low-viscosity PET protective film. Background technique [0002] Protective film has penetrated into all walks of life, such as instruments, meters, electronics, machinery, construction, automobile manufacturing and signage and other industries. The application of protective film not only improves the appearance quality of products, facilitates material processing, but also improves the quality of materials. The utilization rate of the product reduces the production cost of the product. [0003] Foam material refers to a microporous material with numerous bubbles inside based on polymers such as plastics, rubber, elastomers, and natural polymer materials. It can also be regarded as a composite material filled with gas. Foam materials have the advantages of sound insulation, heat preservation, reduced...

Claims

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Application Information

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IPC IPC(8): C09J7/25C09J7/40C09J175/08C09J175/06C09J175/04
CPCC09J175/04C09J175/06C09J175/08C09J2467/006C09J7/25C09J7/40C09J2301/122
Inventor 吴卓慧
Owner NINGBO KELAIEN NEW MATERIAL TECH CO LTD
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