# US 11,441,058 B2 · Dispersion adhesives

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- Number: US 11,441,058 B2
- Document ID: US11441058B2
- Status: Granted
- Kind: B2
- Application number: 17/274,812
- Filed: 2019-09-25
- Published: 2021-10-14
- Granted: 2022-09-13
- Earliest claimed: 2018-09-27
- Assignees: Covestro Intellectual Property GmbH & Co. KG
- Applicants: Covestro Intellectual Property GmbH & Co. KG
- Inventors: Harald Kraus; Robert Liberati; Peter Kueker; Martin Melchiors
- Web page: https://patentgrep.com/patent/US11441058B2

## CPC

- C08G 18/73: acyclic
- C09J 175/06: from polyesters
- B32B 7/12: using interposed adhesives or interposed materials with bonding properties
- B32B 37/1284: {Application of adhesive}
- C08G 18/0828: {containing sulfonate groups or groups forming them}
- C08G 18/3857: {having nitrogen in addition to sulfur}
- C08G 18/4211: {derived from aromatic dicarboxylic acids and dialcohols}
- C08G 18/4238: {derived from dicarboxylic acids and dialcohols}
- C08G 18/664: {with compounds of group C08G18/3203}
- C08G 18/722: {Combination of two or more aliphatic and/or cycloaliphatic polyisocyanates}
- C08G 18/755: {and at least one isocyanate or isothiocyanate group linked to a secondary carbon atom of the cycloaliphatic ring, e.g. isophorone diisocyanate}
- C08K 5/0016: {Plasticisers}
- C09J 11/08: Macromolecular additives
- B32B 2037/1253: {curable adhesive}
- B32B 2037/1269: {multi-component adhesive}
- B32B 2479/00: Furniture
- C08G 2170/80: Compositions for aqueous adhesives
- C08G 2250/00: Compositions for preparing crystalline polymers
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C09J: ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES (preparation of glue or gelatine C09H)
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)

## Abstract

The invention relates to formulations of aqueous dispersion adhesives on the basis of aqueous polyurethane or polyurethane-urea dispersions and the use of the adhesive formulations for bonding foam substrates according to the spray coagulation method.

## Claims

### Claim 1

A process for adhesively bonding substrates by mixing a formulation with a coagulant in a two-component spray gun, wherein the coagulant is conveyed separately into the two-component spray gun and is mixed in a spray jet and the coagulation of the dispersion in the spray jet takes place on a path to a surface of a first substrate, on impact with said substrate forms a film which is immediately tacky in a still-wet state and in the wet state a second surface is immediately joined, optionally with pressure on the substrate towards an adhesive surface,
wherein the formulation comprises:
I. an aqueous polyurethane or polyurethane-urea dispersion, containing as disperse phase a polymer A) which after drying is semicrystalline or crystalline and has a melting temperature in a range from 30 to 80° C. and an enthalpy of fusion of ≥35 J/g,
II. at least one plasticizer resin B),
III. at least one tackifier resin C),
wherein the formulation, based on the total formulation solids, comprises
60%-90% by weight of polymer A),
5%-20% by weight of plasticizer resin B) and
5%-20% by weight of tackifier resin C), and
wherein the formulation comprises from 40% to 85% by weight of water.

### Claim 2 (depends on 1)

The method as claimed in claim 1, wherein the aqueous polyurethane or polyurethane-urea dispersion does not contain an external emulsifier.

### Claim 3 (depends on 1)

The method as claimed in claim 1, wherein the formulation, based on the total formulation solids, comprises
66%-85% by weight of polymer A),
8%-18% by weight of plasticizer resin B) and
7%-16% by weight of tackifier resin C).

### Claim 4 (depends on 1)

The method as claimed in claim 1, wherein the formulation, based on the total formulation solids, comprises
70%-81% by weight of polymer A),
10%-16% by weight of plasticizer resin B) and
9%-14% by weight of tackifier resin C).

### Claim 5 (depends on 1)

The method as claimed in claim 1, wherein the formulation, based on the total formulation solids, comprises
72%-80% by weight of polymer A),
10%-15.5% by weight of plasticizer resin B) and
10%-12.5% by weight of tackifier resin C).

### Claim 6 (depends on 1)

The method as claimed in claim 1, wherein the polymer A), after drying, is semicrystalline or crystalline and has a melting temperature in the range from 35° C. to 80° C.

### Claim 7 (depends on 1)

The method as claimed in claim 1, wherein the polymer A), after drying, is semicrystalline or crystalline and has an enthalpy of fusion of ≥35 J/g.

### Claim 8 (depends on 1)

The method as claimed in claim 1, wherein the plasticizer B) comprises non-volatile, low molecular weight compounds bearing polar groups.

### Claim 9 (depends on 1)

The method as claimed in claim 1, wherein the tackifier resin C) comprises a rosin, and/or a modified rosins.