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A high strength long open time polyurethane reactive hot melt

A technology of hot-melt adhesives and adhesives, applied in polyurea/polyurethane adhesives, adhesive types, polyurea/polyurethane coatings, etc., can solve problems such as impact

Active Publication Date: 2020-05-08
HENKEL KGAA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, large amounts of additives such as fillers can negatively affect most reactive polyurethane hot melt adhesives

Method used

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  • A high strength long open time polyurethane reactive hot melt
  • A high strength long open time polyurethane reactive hot melt
  • A high strength long open time polyurethane reactive hot melt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0059] The following components in Table 1 were used in the following examples.

[0060]

[0061]

[0062]

[0063] The following general formulations (Table 2A) were used to prepare Adhesive Examples 1-15 shown in Table 3 below. Table 2B shows the components used in Example 16 below, which is similar to Example 3 except that there is no filler Except for the industrial control, all polyurethane reactive hot melt adhesive compositions in the following examples were prepared by the following method, and only the polyester polyol was changed as described in Table 3. The process is as follows: add all ingredients except polyisocyanate 4,4'-MDI to a mixer and heat under stirring; then dehydrate the mixture under vacuum at about 110°C to about 130°C for 60 minutes; then 4, 4'-MDI was added to the mixture and the mixture was reacted at 130° C. for 75 minutes; the formed prepolymer was then sealed in a moisture-proof container.

[0064]

[0065]

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PUM

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Abstract

Disclosed is a moisture reactive hot melt adhesive composition prepared from a combination comprising a polyisocyanate, at least one polyether polyol polymer, an acrylic polymer, an inorganic filler and a polyester diol having a structure of Formula 1 or of Formula 2. Formula 1 is: H-[O(CH2) m OOC (CH2) n CO] k -O(CH2) m-OH; m and n are each an even integer; m + n = 8; m and n are each independently selected from 2, 4 or 6; k is an integer from 9 to 55; and the polyol of Formula 1 has a number average molecular weight of about 2,000 to about 11,000. Formula 2, a polycaprolactone polyol, is: HO-[(CH2)5COO] p -R1- [OOC(CH2)5] q -OH; R1 is an initiator such as 1,4'-butanediaol, 1,6'-hexanediol, or ethylene glycol; p is an integer from 0 to 96; q is an integer from 0 to 96; p + q = 16 to 96; and the polyol has a number average molecular weight of about 2,000 to about 11,000 or less.

Description

technical field [0001] The present disclosure relates generally to polyurethane hot melt adhesives, and more particularly to polyurethane hot melt adhesives having long open time, high green strength, high ultimate strength, and significant amounts of non-fossil fuel fillers . Background technique [0002] This section provides background information that is not necessarily prior art to the inventive concepts related to the present disclosure. [0003] Hot melt adhesives are solid at room temperature, but upon application of heat, they melt to a liquid or fluid state in which they are applied to a substrate. After cooling, the binder returns to its solid form. The one or more hard phases formed after the binder cools impart cohesive strength, toughness, creep and heat resistance to the final binder. Hot melt adhesives are generally thermoplastic and can be repeatedly heated to a fluid state and cooled to a solid state. Naturally, the thermoplastic nature limits the upper...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/04C08G18/48C08G18/75C09D175/06C08G18/10C08G18/76C08G18/42
CPCC08G18/4825C08G18/6225C08G18/6229C08G18/755C08G18/758C08G18/7621C08G18/7671C08G18/2081C08G18/4018C08G18/4063C08G18/4238C08G18/4277C08G18/4808C08G2170/20C08K2003/265C08G18/12C08G18/307C09J175/06C08K3/26C09J175/08C08L33/04C09J11/00C09J2301/312C09J2301/304C09J5/00C09J2475/00
Inventor 钦曙辉李英杰J·李
Owner HENKEL KGAA
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