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Laminating adhesive, laminate including the same, and method of making a laminate

A technology of adhesives and laminates, applied in the direction of adhesive types, polyurea/polyurethane adhesives, adhesives, etc., can solve the problem of not always being able to prepare adhesives and/or laminates, reduce specific Film heat sealing performance and other issues

Inactive Publication Date: 2007-08-08
HB FULLER CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although radiation curing can increase cure rates, processing using these techniques does not always produce adhesives and / or laminates with suitable properties
E-beam radiation, for example, can undesirably reduce the heat-sealing properties of certain films

Method used

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  • Laminating adhesive, laminate including the same, and method of making a laminate

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preparation example Construction

[0096] Another suitable method of preparing a laminate comprises applying an adhesive composition to a first substrate, contacting the coated adhesive composition with a second substrate, and combining the adhesive The object or the component as a whole is exposed to radiation. The adhesive composition may be exposed to radiation before, during, or after contacting the adhesive composition with the second substrate.

[0097] Useful substrates include flexible films including, for example, metal foils (aluminum foils), polymer films, and metallized polymer films including, for example, polyolefins (e.g., polypropylene, polyethylene, low density polyethylene, Linear low-density polyethylene, high-density polyethylene, polypropylene, and oriented polypropylene; copolymers of polyolefins with other comonomers), metallized polyolefins (e.g., metallized polypropylene), metallized polyether paraphenylene Dicarboxylates, ethylene vinyl acetate, ethylene methacrylic acid ionomers, eth...

Embodiment 1-8

[0115] Part A was prepared by adding DESMOPHEN S-1011-210 polyester polyol (Bayer Corporation, Pittsburg, Pennsylvania) to a reactor and heating to 130°F. Turn on and maintain nitrogen protection during operation. A sufficient amount of LUPRANATE MI monomer 2,4'-diphenylmethane diisocyanate (MDI) (BASF Corporation, Syandotte, Michigan) was then added to the reactor to achieve a stoichiometric ratio NCO / OH of 2 / 1 (NCO / OH OH) to 2.5 / 1 (NCO / OH). Stir the mixture and allow the temperature to rise to 160°F to 170°F. The reaction is complete within 1 to 2 hours. The %NCO is checked periodically to determine if the reaction is complete, ie: if the target %NCO is reached. Stirring was then stopped and 2-hydroxyethyl acrylate (HEA) (Dow Chemical Co., Midland, Michigan) was added to the reactor for reaction while maintaining a temperature of 160°F to 170°F. The second step reaction is completed within 1 to 2 hours. Check the %NCO to determine if the reaction is complete. Stirring ...

Embodiment 9

[0128] Part A was prepared as follows. 41.5 g of polyester polyol RUCOFLEX 1011-210 was charged to the reactor and heated to 130°F. Turn on and maintain nitrogen protection during operation. A 41.5 g amount of LUPRANATE MI monomer 2,4'-diphenylmethane diisocyanate (MDI) (BASF Corporation, Syandotte, Michigan) was then added to the reactor. Stir the mixture and allow the temperature to rise to 160°F to 170°F. The reaction is complete within 1 to 2 hours. Periodically check the %NCO to determine if the reaction is complete. Stirring was then stopped and the temperature was reduced to 140°F, 8g of 2-hydroxyethyl acrylate (HEA) (Dow Chemical Company, Midland, Michigan) was added to the reactor and the reaction was carried out at a temperature of 160°F to 170°F . The second step reaction is completed within 1 to 2 hours. Check the %NCO to determine if the reaction is complete. Stirring was then stopped and 9 g of LUPRANATE MI monomeric MDI was added to the reactor. Stirring...

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PUM

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Abstract

Disclosed is a method of making a laminate that includes a) preparing an adhesive composition, where the preparing includes combining a first part that includes (meth)acrylate functional, polyisocyanate prepolymer, and polyisocyanate monomer, the first part including at least 10 % by weight isocyanate functional groups, and a second part that includes polyol, at least one of the first part and the second part includes photoinitiator, b) coating a first flexible substrate with the adhesive composition, c) exposing the adhesive composition to radiation to partially cure the adhesive composition, and d) contacting the adhesive composition with a second flexible substrate.

Description

Background technique [0001] The present invention relates to the preparation of dual cure laminating adhesives, and laminates comprising the same. [0002] Flexible packaging materials are widely used in various fields including food packaging. Flexible packaging is usually produced from film laminates in which a first film (eg polyethylene terephthalate, polyamide or cellophane film) and a second film are provided with a layer laminating adhesive. Laminates are often used in food packaging because the desired film properties cannot be obtained from only a single layer or type of film. By combining films with different properties in the form of a laminate, a desired property or combination of properties can be obtained. [0003] Laminates are typically constructed to have a strong cured bond that resists delamination stresses due to the differing modulus of the individual layers, and resists stress during use of the laminate including exposure to heat, cold, and moisture. ...

Claims

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Application Information

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IPC IPC(8): C08G18/10B32B7/12C08G18/67C08J3/24C09J175/16B32B7/00
CPCC08G18/10B32B2250/02Y10T428/31562B32B27/34C08G18/672B32B15/08B32B27/36B32B7/12B32B2255/06Y10T428/31551B32B2255/205B32B27/32B32B2255/26B32B2439/70Y10T428/31587C09J175/16Y10T428/31565B32B2255/10C08G18/42C08G18/7657
Inventor P·T·布谢恩多尔夫P·A·沃斯
Owner HB FULLER CO
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