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Damp fast solidification upper blade gum and preparing method thereof

A fast-curing, web-backed adhesive technology, applied in the direction of adhesives, adhesive types, polyurea/polyurethane adhesives, etc., can solve problems such as poor weather resistance, decreased bond strength, and slow curing speed

Active Publication Date: 2017-04-12
HUNAN MAGPOW ADHESIVE INDS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, most adhesives are unsaturated resin adhesives, but unsaturated resin adhesives have obvious shortcomings: first, they have a strong smell, are not environmentally friendly, and contain suspected carcinogens; second, they have poor weather resistance and poor bonding strength. After one month, the bond strength drops significantly, and even the glue layer falls off; the third is that the bond strength is seriously reduced in a humid environment, and the holes and cracks of the stone plate inevitably contain a small amount of water, so unsaturated resin adhesives are not suitable for use. Suitable for stone panels
However, the initial curing time of polyurethane adhesives on the market is at least 4 hours. The fast curing speed in the early stage leads to a rapid rise in viscosity, which makes the later curing speed very slow, and its pot life is short. Use it immediately, otherwise its bonding performance will decline rapidly after the pot life

Method used

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  • Damp fast solidification upper blade gum and preparing method thereof
  • Damp fast solidification upper blade gum and preparing method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0066] The preparation step S100 of component A includes: selecting the following materials in parts by weight as the raw materials of component A: 60-90 parts of hydroxyl-terminated polyurethane, 10-30 parts of vegetable oil polyol, 1-5 parts of chain extender, and 0.1-90 parts of catalyst. 5 parts, 0.1 to 1 part of defoamer, 0.1 to 3 parts of latent curing agent, 0.1 to 1 part of antioxidant and 0.1 to 1 part of light stabilizer; mix the raw materials of component A in vacuum environment according to parts by weight, Obtain the A component.

[0067] Preferably, in step S100, the time for mixing the raw materials of component A in a vacuum environment is 0.5 h.

[0068] In one of the embodiments, the structure of the hydroxyl-terminated polyurethane is as follows:

[0069] (OH)n-R 2 -OOC-NH-R 1 -NH-COO-R 2 -(OH)n, n is 1 or 2;

[0070] It is prepared by the following steps: (OH)n-R 2 -OH is heated to 100-120°C, and stirred under vacuum for 1-2 hours; then cooled to 75-8...

Embodiment 1

[0081] The moisture fast curing back mesh adhesive of embodiment 1 includes A component and B component.

[0082] In parts by weight, component A includes: 82 parts of hydroxyl-terminated polyurethane, 10 parts of castor oil, 1 part of chain extender diethylene glycol, 0.5 part of organic bismuth catalyst, 0.5 part of defoamer BYK-141, latent 0.6 parts of curing agent trimethylacetaldehyde-triethylenediamine, 0.2 parts of antioxidant 1010, 0.2 parts of light stabilizer UV-327, 5 parts of ethyl acetate as the first solvent. Wherein, the hydroxyl-terminated polyurethane is formed by polyurethane polymerization of polyether polyol DL-2000D and polyisocyanate PAPI, and the hydroxyl value of the hydroxyl-terminated polyurethane is 100 mg / g.

[0083] The preparation step of component A: mix the raw materials of component A in vacuum environment for 0.5h according to parts by weight to obtain component A.

[0084] In parts by weight, component B includes: 90 parts of isocyanate-term...

Embodiment 2

[0088] The moisture fast curing back mesh adhesive of embodiment 2 includes A component and B component.

[0089] In parts by weight, component A includes: Component A includes: 82 parts of hydroxyl-terminated polyurethane, 10 parts of soybean oil polyol, 1 part of chain extender MOCA, 0.5 part of organic zinc catalyst, and 0.5 part of defoamer BYK-066N , 0.6 parts of latent curing agent trimethylacetaldehyde-ethylenediamine, 0.2 parts of antioxidant 264, 0.2 parts of light stabilizer UV-326, 5 parts of the first solvent ethyl acetate. Wherein, the hydroxyl-terminated polyurethane is formed by polyurethane polymerization of polyether polyol DL-1000D and polyisocyanate MDI, and the hydroxyl value of the hydroxyl-terminated polyurethane is 100 mg / g.

[0090] The preparation step of component A: mix the raw materials of component A in vacuum environment for 0.5h according to parts by weight to obtain component A.

[0091] In parts by weight, component B includes: 70 parts of iso...

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Abstract

The invention relates to a damp fast solidification upper blade gum and preparing method thereof. The upper blade gum is composed of a component A and a component B. The component A is prepared from, by weight, 60-90 parts of hydroxyl-terminated polyurethane, 10-30 parts of vegetable oil polyols, 1-5 parts of chain extender, 0.1-5 parts of catalyst, 0.1-1 part of defoamer and 1-3 parts of latent curing agent. The component B includes isocyanate terminated polyurethane. Because both hydroxyl-terminated polyurethane and isocyanate terminated polyurethane are polymers, the damp fast solidification upper blade gum avoids the process that polyurethane adhesive aggregates from monomers, shortens the solidification time of polyurethane adhesive material, and improves the solidification speed. Besides, the activity of hydroxyl-terminated polyurethane and isocyanate terminated polyurethane is moderate, so that viscosity of a polyreaction system increases slowly in the preliminary stage, and the problems of very slow solidification speed in the later stage and shortened working life caused by quick increase of viscosity and fast speed in the preliminary solidification stage due to over large activity are avoided.

Description

technical field [0001] The invention relates to the technical field of adhesive materials, in particular to a moisture fast-curing backing mesh adhesive and a preparation method thereof. Background technique [0002] With the extensive application of substrates such as stone slabs in the construction industry, adhesives are often required. Due to the shortcomings of natural cracks, high brittleness and low flexural strength of the stone plate, the glass fiber reinforced mesh is pasted with adhesive on the back of the stone plate to improve the flexural strength of the stone, and at the same time, the adhesive is penetrated into the cracks in the stone plate , after the adhesive is cured, it can play a role in reinforcing the stone slab, thereby reducing or avoiding the damage of the stone slab. [0003] At present, most adhesives are unsaturated resin adhesives, but unsaturated resin adhesives have obvious shortcomings: first, they have a strong smell, are not environmental...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/08C09J175/14
Inventor 袁媛毛先安
Owner HUNAN MAGPOW ADHESIVE INDS
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