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1. (WO2014099098) COMPOSITION ADHÉSIVE
Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

CLAIMS

1. A hot melt pressure-sensitive adhesive composition comprising a propylene-based polymer component comprising from about 60 to about 98 wt% propylene and from about 2 to about 40 wt% of one or more of ethylene and C4-C10 alpha-olefins, based on the weight of the propylene-based polymer component, the propylene-based polymer component having a melting point less than or equal to about 130°C and a triad tacticity greater than about 75%; the hot melt pressure-sensitive adhesive composition free of or comprising not more than about 30 wt% of a block copolymer based on the weight of the hot melt pressure sensitive adhesive composition.

2. The hot melt pressure-sensitive adhesive composition of claim 1, wherein the propylene-based polymer component comprises from about 75 to about 98 wt% propylene and from about 2 to about 25 wt% of one or more of ethylene and C4-C10 alpha-olefins, and wherein the propylene-based polymer component has a melting point less than or equal to about 120°C.

3. The hot melt pressure-sensitive adhesive composition of claim 1, wherein the propylene-based polymer component further has a heat of fusion less than about 90 J/g.

4. The hot melt pressure-sensitive adhesive composition of claim 1, wherein the propylene-based polymer component has a melt flow rate (MFR) of from about 1 to about 900 g/10 min, as measured according to ASTM D-1238 at 230°C, 2.16 kg.

5. The hot melt pressure-sensitive adhesive composition of claim 1, having a viscosity of less than or equal to about 150,000 mPa-s at 175°C determined according to ASTM D 3236, or an equivalent thereof.

6. The hot melt pressure-sensitive adhesive composition of claim 1, comprising less than 0.01 wt% of the block copolymer.

7. The hot melt pressure-sensitive adhesive composition of claim 1, comprising less than 0.01 wt% of a block copolymer comprising styrene.

8. The hot melt pressure-sensitive adhesive composition of claim 1, comprising from about 1 , to about 60 wt% of a hydrocarbon tackifier resin based on the weight of the hot melt pressure sensitive adhesive.

9. The hot melt pressure-sensitive adhesive composition of claim 8, wherein the hydrocarbon tackifier resin has a ring-and-ball softening point of from about 50 to about 150°C.

The hot melt pressure-sensitive adhesive composition of claim 1, comprising from about 1 to about 30 wt% of a process oil based on the weight of the hot melt pressure-sensitive adhesive.

The hot melt pressure-sensitive adhesive composition of claim 1, wherein the hot melt pressure-sensitive adhesive composition is a removable hot melt pressure-sensitive adhesive and wherein the hot melt pressure-sensitive adhesive composition comprises less than 0.01 wt% total of silicon oils and waxes.

The hot melt pressure-sensitive adhesive composition of claim 1, having a clear visual determination, wherein the visual determination consists of providing a testing square consisting of a piece of white 20 pound weight paper having a brightness of 90%, the testing square having a printed portion comprising the capital letters "O" and "Q" printed with a laser printer to be visually distinguishable at 1 space apart from each other thereon in black text using 10-point Helvetica font;

depositing a sample of the hot melt pressure-sensitive adhesive composition at a temperature above the melting point of the hot melt pressure-sensitive adhesive composition onto the testing square using a flat applicator to cover the printed portion of the testing square with a film of the hot melt pressure- sensitive adhesive composition having a thickness of 1 mm, followed by allowing the hot melt pressure-sensitive adhesive composition to cool to a temperature of 25°C to produce a prepared test sample; and

visually determining the clarity of the prepared test sample wherein the prepared test sample has a clear visual determination when an observer having essentially 20:20 vision is able to visually distinguish the letter "O" from the letter "Q" in the printed portion of the testing square at a distance of about 30 cm from the prepared test sample at an illumination of 1000 lux.

The hot melt pressure-sensitive adhesive composition of claim 1, wherein the propylene-based polymer component has a solubility in toluene of less than 10 wt% at

25°C.

An adhesive article comprising a substrate and a hot melt pressure-sensitive adhesive composition comprising a propylene-based polymer component comprising from about 60 to about 98 wt% propylene and from about 2 to about 40 wt% ethylene and/or C4-C10 alpha-olefins, based on the weight of the propylene-based polymer component, the propylene-based polymer component having a melting point less than or equal to about 130°C and a triad tacticity greater than about 75%; the adhesive composition free of or comprising less than about 30 wt% of a block copolymer based on the weight of the hot melt pressure-sensitive adhesive.

The adhesive article of claim 14, wherein the hot melt pressure-sensitive adhesive composition comprises from about 1 to about 60 wt% of a hydrocarbon tackifier resin based on the weight of the hot melt pressure-sensitive adhesive.

The adhesive article of claim 15, wherein the hydrocarbon tackifier resin has a ring-and-ball softening point of from about 50 to about 150°C.

The adhesive article of claim 14, wherein the hot melt pressure-sensitive adhesive composition comprises less than about 0.01 wt% of the block copolymer.

The adhesive article of claim 14, wherein the adhesive composition has a clear visual determination, wherein the visual determination consists of providing a testing square consisting of a piece of white 20 pound weight paper having a brightness of 90%, the testing square having a printed portion comprising the capital letters "O" and "Q" printed with a laser printer to be visually distinguishable at 1 space apart from each other thereon in black text using 10-point Helvetica font;

depositing a sample of the composition at a temperature above the melting point of the composition onto the testing square using a flat applicator to cover the printed portion of the testing square with a film of the composition having a thickness of 1 mm, followed by allowing the composition to cool to a temperature of 25°C to produce a prepared test sample; and

visually determining the clarity of the prepared test sample wherein the prepared test sample has a clear visual determination when an observer having essentially 20:20 vision is able to visually distinguish the letter "O" from the letter "Q" in the printed portion of the testing square at a distance of about 30 cm from the prepared test sample at an illumination of 1000 lux.

The adhesive article of claim 14, wherein the adhesive article is an adhesive tape having an initial 180° peel strength of the tape on glass of from 0.1 to about 10 N/25 mm at a coating weight of 20 g/m2.

The adhesive article of claim 14, wherein the adhesive article is an adhesive tape having an initial 180° peel strength of the tape on polyethylene film of from 0.1 to about 10 N/25 mm at a coating weight of 20 g/m2.