Patent application EP20180557A (EP), filed 2020-06-17
Publication number: EP3757157A1
Title: COMPOSITION, FOAM SUBSTRATE, BACKING, ADHESIVE TAPE AND USE OF THE SAME
Abstract: The present invention refers to composition, foam substrate, backing, adhesive tape and the use thereof, said composition comprises at least one aqueous elastomer dispersion and expandable microspheres or expanded microspheres.
IPC codes: C08J   9/    32            A I
C08K   9/    10            A I
C08L  75/    08            A I
C09J   7/    26            A I
Claims: number: 1
text: A composition comprising at least one aqueous elastomer dispersion and expandable microspheres or expanded microspheres.
number: 2
text: The composition as claimed in claim 1, wherein the aqueous elastomer dispersion is an aqueous polyurethane dispersion, preferably an aqueous polyether based polyurethane dispersion.
number: 3
text: The composition as claimed in claim 2, comprising a first aqueous polyether based polyurethane dispersion and a second aqueous polyether based polyurethane dispersion, wherein the polyurethane in the first aqueous polyether based polyurethane dispersion has an elongation at break of 550% to 1000%, preferably 600% to 750%, and the polyurethane in the second aqueous polyether based polyurethane dispersion has a elongation at break of below 500%.
number: 4
text: The composition as claimed in claim 3, wherein the first aqueous polyether based polyurethane dispersion has a viscosity (25 °C) of 100 mPa.s to 150 mPa.s and a 100% modulus of 0.2 MPa to 3 MPa.
number: 5
text: The composition as claimed in claim 3, wherein the second aqueous polyether based polyurethane dispersion has a viscosity (25 °C) of below 30 mPa.s and a 100% modulus of 4 MPa to 30 MPa.
number: 6
text: The composition as claimed in any one of claims 1 to 5, wherein when a foam substrate obtained from the composition is used in an adhesive tape, the adhesive tape has a shock strength in x,y-plane of 0.5 J to 1.4 J and also a shock strength in z-plane of 0.5 J to 1.2 J, as measured in Dupont test.
number: 7
text: Foam substrate obtained by using the composition as claimed in any one of claims 1 to 6, wherein the foam substrate is a closed-cell foam substrate
number: 8
text: Backing comprising the foam substrate as claimed in claim 7 and a filmic layer for protection/reinforcement applied on at least one side of the foam substrate.
number: 9
text: Adhesive tape comprising the foam substrate as claimed in claim 7 or the backing as claimed in claim 8 and at least one layer of adhesive, preferably pressure sensitive adhesive.
number: 10
text: Use of the adhesive tape as claimed in claim 9 in lens mounting, shock absorption bonding or bonding a foldable device.
Office action: search_report, dated 2020-12-30
Rejection reasons: novelty_epc_54
Prior art cited: ref_id: EP2860028A1
ref_type: patent
severity: background
ref_id: JP2014080513A
ref_type: patent
severity: background
ref_id: CN109137537A
ref_type: patent
severity: background
ref_id: CN106634504B
ref_type: patent
severity: background
ref_id: US2002094403A1
ref_type: patent
severity: background
ref_id: US2002094403
ref_type: patent
severity: novelty_destroying
ref_id: JP2014080513
ref_type: patent
severity: novelty_destroying
ref_id: EP2860028
ref_type: patent
severity: novelty_destroying
ref_id: CN109137537
ref_type: patent
severity: novelty_destroying
ref_id: CN106634504B
ref_type: patent
severity: novelty_destroying
Final disposition: pending (2020-12-30)