# US 10,370,567 B2 · Hot melt adhesive

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- Number: US 10,370,567 B2
- Document ID: US10370567B2
- Status: Granted
- Kind: B2
- Application number: 15/609,455
- Filed: 2017-05-31
- Published: 2017-09-14
- Granted: 2019-08-06
- Earliest claimed: 2011-09-16
- Assignees: Henkel AG & Co. KGaA
- Applicants: Henkel AG & Co. Kgaa
- Inventors: Masahiro Moriguchi; Shigekazu Saito
- Web page: https://patentgrep.com/patent/US10370567B2

## CPC

- C09J 123/12: Polypropene
- C08L 23/0815: {with aliphatic 1-olefins containing one carbon-to-carbon double bond}
- C09J 7/35: Heat-activated
- C09J 11/06: organic
- C09J 123/08: Copolymers of ethene (C09J123/16 takes precedence)
- C08L 2314/06: Metallocene or single site catalysts
- Y10T 428/2826: Synthetic resin or polymer
- 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)
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

The present invention provides a hot melt adhesive for high-speed coating and spiral coating at low temperature. The hot melt adhesive has excellent adhesion to polyethylene and nonwoven fabric, and is suitable for disposable products. The hot melt adhesive comprises: (A) a propylene homopolymer having a melting point of 100° C. or lower which is obtainable by polymerizing propylene using a metallocene catalyst; and (B) an ethylene-based copolymer.

## Claims

### Claim 1

A hot melt adhesive, comprising:
(A) a propylene homopolymer which has a melting point not higher than 100° C. and is obtainable by polymerizing propylene with a metallocene catalyst;
(B) an ethylene-based copolymer;
(C) a tackifier resin; and
(D) an oil,
wherein (A) the propylene homopolymer comprises both (A1) a propylene homopolymer having weight average molecular weight not more than 60,000 and (A2) a propylene homopolymer having weight average molecular weight more than 60,000,
wherein (B) the ethylene-based copolymer comprises an ethylene/α-olefin copolymer, and the ethylene/α-olefin copolymer comprises an ethylene/propylene copolymer, and
wherein the combined (A) the propylene homopolymer and (B) the ethylene-based copolymer is 100 parts by weight of the total weight of the hot melt adhesive;
wherein (A) the propylene homopolymer is 60 to 95 parts by weight per 100 parts by weight of the combined (A) the propylene homopolymer and (B) the ethylene-based copolymer;
wherein (C) the tackifier resin is 20 to 180 parts by weight of the total weight of the hot melt adhesive; and
wherein (D) the oil is 40 to 120 parts by weight of the total weight of the hot melt adhesive.

### Claim 2 (depends on 1)

The hot melt adhesive according to claim 1, wherein (B) the ethylene-based copolymer comprises an ethylene/α-olefin copolymer which is obtainable by polymerization with a metallocene catalyst, and wherein the ethylene/α-olefin copolymer comprises an ethylene/propylene copolymer.

### Claim 3 (depends on 1)

The hot melt adhesive according to claim 1, wherein the adhesive has a melt viscosity at 150° C. of 7,000 mPa·s or less.

### Claim 4 (depends on 1)

The hot melt adhesive according to claim 1, wherein the adhesive further comprises (E) a wax, and (E) the wax comprises a wax modified with a carboxylic acid and/or carboxyl anhydride.

### Claim 5 (depends on 1)

A disposable product comprising the hot melt adhesive of claim 1.