# US 10,767,083 B2 · Polyolefin hot-melt glue having a low reactivation temperature and high heat stability and use thereof for vacuum deep-drawing lamination

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 10,767,083 B2
- Document ID: US10767083B2
- Status: Granted
- Kind: B2
- Application number: 15/753,891
- Filed: 2016-09-13
- Published: 2018-09-06
- Granted: 2020-09-08
- Earliest claimed: 2015-09-14
- Assignees: Sika Technology AG
- Applicants: Sika Technology AG
- Inventors: Doreen Janke; Kai Paschkowski; Mathias Cordes; Dirk Urbach
- Web page: https://patentgrep.com/patent/US10767083B2

## CPC

- C09J 5/06: involving heating of the applied adhesive
- B32B 7/12: using interposed adhesives or interposed materials with bonding properties
- B32B 15/085: comprising polyolefins
- B32B 27/12: next to a fibrous or filamentary layer
- B32B 27/30: comprising vinyl {(co)polymers; comprising acrylic (co)polymers}
- B32B 27/302: {comprising aromatic vinyl (co)polymers, e.g. styrenic (co)polymers}
- B32B 27/304: {comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF}
- B32B 27/32: comprising polyolefins {(comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30)}
- B32B 27/34: comprising polyamides
- B32B 27/36: comprising polyesters
- B32B 27/365: {comprising polycarbonates}
- B32B 37/1207: {Heat-activated adhesive (B32B37/04 takes precedence)}
- C08J 5/128: {Adhesives without diluent}
- C08L 23/14: Copolymers of propene (C08L23/16 takes precedence)
- C08L 51/06: grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond
- C09J 123/02: not modified by chemical after-treatment
- C09J 123/14: Copolymers of propene (C09J123/16 takes precedence)
- B32B 2037/1223: {film-shaped}
- B32B 2250/02: 2 layers
- B32B 2255/02: on fibrous or filamentary layer
- B32B 2255/06: on metal layer
- B32B 2255/08: on wood layer
- B32B 2255/10: on synthetic resin layer or on natural or synthetic rubber layer
- B32B 2262/0253: Polyolefin fibres
- B32B 2262/0276: Polyester fibres
- B32B 2262/04: Cellulosic plastic fibres, e.g. rayon
- B32B 2262/062: Cellulose fibres, e.g. cotton
- B32B 2262/14: Mixture of at least two fibres made of different materials
- B32B 2323/04: Polyethylene
- B32B 2605/00: Vehicles
- C08J 2309/06: Copolymers with styrene
- C08J 2323/12: Polypropene
- C08J 2423/02: not modified by chemical after treatment
- C08J 2491/06: Waxes
- C08L 2207/14: Amorphous or atactic polypropylene
- C08L 2666/06: Homopolymers or copolymers of unsaturated hydrocarbons; Derivatives thereof
- C09J 2423/00: Presence of polyolefin
- C09J 2423/006: in the substrate
- C09J 2451/00: Presence of graft polymer
- C09J 2491/00: Presence of oils, fats or waxes
- 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
- C08J: WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H (working, e.g. shaping, of plastics B29)
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)

## Abstract

A hot-melt glue composition, including a) at least one atactic poly-α-olefin (APAO) that is solid at 25° C.; b) at least one hydrocarbon resin having a softening point of at least 80° C., measured in accordance with the ring-and-ball method according to DIN EN 1238; and c) at least one maleic-anhydride-grafted wax having a softening point of not more than 150° C., measured in accordance with the ring-and-ball method according to DIN EN 1238, which is a maleic-anhydride-grafted polypropylene wax or a maleic-anhydride-grafted polyethylene wax, wherein the proportion of the at least one maleic-anhydride-grafted wax in the hot-melt glue composition is at least 3 wt %. The hot-melt glue composition is characterized by a low reactivation temperature, together with high heat resistance and good adhesion to ABS and nonpolar polyolefin materials. The hot-melt glue composition is well suited for film lamination by vacuum deep-drawing lamination, in particular for applications in automobile construction.

## Claims

### Claim 1

A method for producing a bonded assembly composed of a substrate element and a foil by adhesive bonding, the method comprising the following steps:
a) applying a hotmelt adhesive composition to one side of a foil, wherein the hotmelt adhesive composition comprises
1) at least one atactic poly-α-olefin (APAO) which is solid at 25° C.;
2) at least one hydrocarbon resin having a softening point of at least 80° C., measured by the ring & ball method according to DIN EN 1238; and
3) at least one maleic anhydride-grafted wax having a softening point of not more than 150° C., measured by the ring & ball method according to DIN EN 1238, which is a maleic anhydride-grafted polypropylene wax or a maleic anhydride-grafted polyethylene wax,
wherein a fraction of the at least one maleic anhydride-grafted wax in the hotmelt adhesive composition is at least 3 wt %,
wherein the hotmelt adhesive composition contains no atactic poly-α-olefin containing silane groups, and
wherein a fraction of further thermoplastic polymers which differ from 1) the atactic poly-α-olefin (APAO), 2) the hydrocarbon resin, and 3) the maleic anhydride-grafted wax in the hotmelt adhesive composition is less than 5 wt % of the hotmelt adhesive composition;
b) heating the foil coated with the hotmelt adhesive composition, for reactivating, and
c) drawing the reactivated foil, coated with the hotmelt adhesive composition, onto the substrate element, with the hotmelt adhesive composition coming into contact with the substrate element and, after cooling, producing the bonded assembly.

### Claim 2 (depends on 1)

The method as claimed in claim 1, wherein the foil is a TPO foil and/or the substrate element, or the surface of the substrate element to be laminated, is made of a polypropylene, natural-fiber or ABS material, and/or the foil is drawn onto the substrate element by vacuum forming lamination or IMG lamination.

### Claim 3 (depends on 1)

An assembly obtainable by a method as claimed in claim 1.

### Claim 4 (depends on 1)

The method as claimed in claim 1, wherein the hotmelt adhesive composition contains substantially no further thermoplastic polymers which differ from a) the atactic poly-α-olefin (APAO), b) the hydrocarbon resin, and c) the maleic anhydride-grafted wax in the hotmelt adhesive composition.