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Latex adhesive with coating enhancer

A technology of latex adhesives and adhesives, which is applied in the direction of film/sheet adhesives, non-polymer adhesive additives, adhesive additives, etc., and can solve the problems of unstable latex particles, flammable solutions, coagulation, etc. question

Inactive Publication Date: 2006-07-19
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this approach is usually not acceptable from a cost and performance standpoint
The addition of common organic solvents such as methyl ethyl ketone (“MEK”) or toluene is also an option to improve coatability, but this method has some detrimental effects on water-based adhesives, some of which include making the solution flammable, Adversely affects the "environmentally friendly" status of waterborne adhesives and destabilizes latex particles which can lead to coagulation

Method used

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  • Latex adhesive with coating enhancer
  • Latex adhesive with coating enhancer

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Mix 3MFASTBOND with 0.1% CE-2N black pigment (product of Ciba-Geigy, Hawthorne, NY) TM 49 (Isooctyl acrylate / acrylic acid copolymer latex, 56% solids in water, produced by 3M Company) adhesive to form a gray color to see defects. While stirring with a 3-blade propeller-type stirring blade pneumatic mixer, 2.5% by weight of n-octanol (product of Eastman Chemical Company, Kingsport, TN) was added to the mixture. The stirring speed is set to have a slight vortex but no air inclusions. Slowly add n-octanol to prevent the adhesive from shaking and causing coagulation. The viscosity was measured with a Brookfield LVT viscometer with #2 spindle at 30 RPM. The viscosity was recorded as 450 centipoise (450×10 -3 Pa·sec). Then use a bar coater with a nominal coating gap of 75 microns to coat the liquid on the Comply TM Lining SCw1007 (product of 3M Company in St. Paul, Minnesota). Dry the sample at 65°C for 10 minutes. The weight of the dry coating measured on the analytical balance ...

Embodiment 2

[0033] Use 72g 3M FASTBOND TM 49 Binder was mixed with 27 g DI water, 0.15 g CE-2 carbon black, 1 g 28% ammonia water, 0.5 g Acrysol ASE-60 (product of Rohm and Haas Co., Ltd., Philadelphia, PA) and 2.5 g n-octanol. The steps are the same as in Example 1. The viscosity is 200 centipoise. Coated in the same way as in Example 1, the dry coating weight is 0.37g / 154.8cm 2 . It has two flaws. The purpose of this embodiment is to coat at the same wet coating thickness, but with a lower dry coating weight of the adhesive.

Embodiment 3-5

[0035] Same as Example 2, but the amount of ASE-60 was increased to 1.0, 1.5, and 2.0 g, respectively. All samples have zero defects. See Table 1.

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Abstract

A coatable adhesive comprising a latex adhesive and a coating-enhancing amount of a linear or branched, optionally unsaturated mono-alcohol. Methods of improving the coatability of latex adhesives, and composites comprising adhesives that have been coated with such latex adhesives are also provided. Structured liner composites particularly benefit from such alcohol additives, which further may be optionally be interrupted with one or more oxygens.

Description

Technical field [0001] The present invention relates to coatable adhesives. More specifically, the present invention relates to coatable latex adhesives. Background technique [0002] It is always difficult to coat water-based paints or adhesives on low-energy surfaces. The crux of the problem is that water is a high-energy liquid and cannot easily wet low-energy surfaces. This results in the water-based paint covering the low-energy surface in the form of beads, similar to the beading of water on the shell of a new car. [0003] Many methods for reducing this situation are known in the art. One method is to use a chemical primer to increase the surface energy of the substrate, or to use methods such as corona discharge treatment or flame treatment. The second method is to reduce the dyne level of water-based coatings by adding natural soaps or synthetic surfactants. There are many types known in the art. The third method is to increase the viscosity ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J7/02C09J201/00C09J157/00C09J7/35C09J11/06
CPCC09J7/021C09J7/0203C09J201/00C09J7/35C09J7/381
Inventor F·V·小隆查尔
Owner 3M INNOVATIVE PROPERTIES CO