Two-component solventless adhesive compositions

An adhesive and solvent-free technology, applied in the direction of non-polymer adhesive additives, adhesive additives, adhesives, etc., can solve problems such as adhesive coating technology problems, achieve fast curing speed, improve performance, and improve method efficiency Effect

Pending Publication Date: 2019-10-18
DOW GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such adhesive compositions pose challenges to conventional adhesive application techniques

Method used

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  • Two-component solventless adhesive compositions
  • Two-component solventless adhesive compositions
  • Two-component solventless adhesive compositions

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0056] Illustrative Example 1 ("IE1")

[0057] Table 3: Composition of CR2D

[0058]

[0059]

[0060] Make VORANOL at 80°C under a nitrogen purge TM CP 450, VORANOL TM CP755 and ISONATE TM 125M was reacted in the reactor for 2 hours to form OH terminated polyether polyurethane. Synthetic polyether polyurethane with SPECFLEX TM ACTIV 2306 and MOR-FREE TM 88-138 blend to form co-reactant 2D ("CR2D"). The detailed composition information of CR2D is listed in Table 3.

[0061] A polyurethane adhesive comprising approximately 52.2% by weight polyisocyanate A and 47.8% by weight CR 2D was used to bond foil / polyethylene ("PE") structures and polyethylene terephthalate ("PET") / PE structure. The prepared laminates were cured at 25°C and 50% relative humidity. The prepared laminate samples were cut into 15mm wide strips and their T-peel adhesive strength was evaluated on a Thwing-Albert Peel Tester at 4 inches / minute. If one of the substrates elongates or tears, re...

example 2

[0063] Illustrative Example 2 ("IE2")

[0064] Table 4: Composition of CR2F

[0065] Material Percentage (weight%) VORANOL TM CP755

52.7 VORANOL TM CP450

9 ISONATE TM 125M

9.3 SPECFLEX TM ACTIV 2306

17 MOR-FREE TM 88-138

12

[0066] Make VORANOL at 80°C under a nitrogen purge TM CP 755 and ISONATE TM 125M was reacted in the reactor for 2 hours to form OH terminated polyether polyurethane. Synthetic polyether polyurethane with VORANOL TM CP450, SPECFLEX TM ACTIV 2306 and MOR-FREE TM 88-138 blend to form CR2F. The detailed composition information of CR 2F is listed in Table 4.

[0067] A polyurethane adhesive comprising about 52.6% by weight polyisocyanate A and 47.4% by weight CR2F was used to bond the foil / PE structure and the PET / PE structure. The prepared laminates were cured at 25°C and 50% relative humidity. Laminate samples were cut into 15mm wide strips and evaluated for their T-peel adhesion ...

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Abstract

Two-component solventless polyurethane adhesive compositions are disclosed. In some embodiments, the solventless adhesive composition includes an isocyanate component including an isocyanate. The solventless adhesive composition further includes a isocyanate-reactive component including a highly-reactive amine-initiated polyol comprising two or more primary hydroxyl groups and a backbone incorporating tertiary amines. The isocyanate-reactive component further includes a phosphate ester polyol. The isocyanate-reactive component can further include one or more non-amine-initiated polyols. Methods for forming a laminate structure are also disclosed, comprising uniformly applying an isocyanate component to a first substrate, uniformly applying a isocyanate-reactive component to a second substrate, bringing the first and second substrates together, thereby mixing and reacting the isocyanate component and the isocyanate-reactive component to form an adhesive between the first and second substrates, and curing the adhesive to bond the first and second substrates. Still further, laminates comprising the adhesive compositions are disclosed.

Description

[0001] References to related applications [0002] This application claims the benefit of U.S. Provisional Application No. 62 / 451,304, filed January 27, 2017. technical field [0003] The present invention relates to solvent-free adhesive compositions. More particularly, the present invention relates to two-component solvent-free polyurethane adhesive compositions for use in laminated structures. The disclosed adhesive compositions include amine initiated polyols and phosphate polyols that provide layered structures with improved conversion efficiency and are suitable for high performance food packaging applications (eg, retort pouch applications). [0004] In some embodiments, the adhesive composition exhibits high reactivity, and thus is formulated to be applied independently to two substrates, which are then brought together to allow the adhesive composition to mix and react. In particular, one component of the adhesive composition is configured to coat the surface of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/50C08G18/66C08G18/76C08G18/10C08G18/38C09J175/04
CPCC08G18/5021C08G18/5084C08G18/6685C08G18/7671C08G18/10C08G18/3885C09J175/04C08G18/3275C08G18/755C08G18/758C09J11/06C09J175/06C09J175/08C09J2475/00
Inventor 吴杰谢芮K·斯哈诺比什
Owner DOW GLOBAL TECH LLC
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