Patent application EP19181978A (EP), filed 2019-06-24
Publication number: EP3757162A1
Title: THERMOPLASTIC POLYMER COMPOSITIONS WITH IMPROVED FLEXIBILITY
Abstract: [0001]    The invention is directed to a thermoplastic composition comprising at least one butene-1 (co)polymer, at least one heterophasic propylene copolymer, and optionally at least one propylene-based elastomer. The invention is also related to use of the thermoplastic composition according to any one of previous claims for producing a shaped article, to a shaped article comprising a substrate layer comprising the thermoplastic composition of the present invention, to a method for producing a shaped article, and to a method for covering a substrate using the shaped articles of the present invention.
IPC codes: C08L  23/    16            A I
Claims: number: 1
text: A thermoplastic composition comprising a polymer component comprising:
number: 2
text: The thermoplastic composition according to claim 1, wherein the at least one butene-1 copolymer has a flexural modulus at 23°C determined according to ISO 178 standard of not more than 150 MPa, preferably not more than 125 MPa and/or a melting temperature determined by DSC according to ISO 11357 standard using a heating rate of 2°C/min of not more than 110°C, preferably not more than 100°C and/or a polydispersity index (M<w>/M<n>) determined by GPC of 1.5 - 5, preferably 1.5 - 4.5.
number: 3
text: The thermoplastic composition according to claim 1 or 2, wherein the at least one butene-1 (co)polymer is a homopolymer of butene-1 or a copolymer of butene-1 with one or more α-olefins, preferably selected from the group consisting of ethylene and propylene.
number: 4
text: The thermoplastic composition according to any one of previous claims, wherein the at least one ethylene-based olefin block copolymer is an ethylene - α-olefin block copolymer, preferably an ethylene - octene block copolymer.
number: 5
text: The thermoplastic composition according to any one of previous claims, wherein the at least one heterophasic propylene copolymer has a flexural modulus at 23°C determined according to ISO 178 standard of not more than 1000 MPa, preferably not more than 750 MPa and/or a xylene cold soluble content (XCS) determined according to ISO 16152-2005 of not more than 50 wt.-%, preferably not more than 45 wt.-%.
number: 6
text: The thermoplastic composition according to any one of previous claims, wherein the at least one heterophasic propylene copolymer is a heterophasic ethylene - propylene copolymer, preferably having a content of ethylene derived units of not more than 35 wt.-%, preferably not more than 30 wt.-%.
number: 7
text: The thermoplastic composition according to any one of previous claims, the at least one heterophasic propylene copolymer is a heterophasic ethylene - propylene random copolymer.
number: 8
text: The thermoplastic composition according to one any one of previous claims, wherein the at least one heterophasic propylene copolymer comprises at least 5 wt.-%, preferably at least 10 wt.-% of the total weight of the polymer component.
number: 9
text: The thermoplastic composition according to any one of previous claims, wherein the at least one propylene-based elastomer is a propylene - ethylene copolymer having a content of propylene derived units of 75 - 95 wt.-%, preferably 80 - 90 wt.-% and a content of ethylene derived units of 5 - 25 wt.-%, preferably 9 - 18 wt.-%.
number: 10
text: The thermoplastic composition according to any one of previous claims, wherein the at least one propylene-based elastomer has a flexural modulus at 23 °C determined according to ISO 178 standard of not more than 100 MPa, preferably not more than 50 MPa and/or a heat of fusion as determined by DSC using a heating rate of 10 °/min of not more than 80 J/g, preferably not more than 70 J/g and/or a xylene cold soluble content (XCS) determined according to ISO 16152-2005 of at least 75 wt.-%, preferably at least 85 wt.-%.
number: 11
text: The thermoplastic composition according to any one of previous claims, wherein the composition is substantially free of tackifying resins.
number: 12
text: The thermoplastic composition according to any one of previous claims further comprising 1 - 55 wt.-%, preferably 15 - 50 wt.-% of at least one flame retardant.
number: 13
text: Use of the thermoplastic composition according to any one of previous claims for producing a shaped article, preferably a waterproofing or a roofing membrane.
number: 14
text: A shaped article comprising a substrate layer comprising or essentially consisting of the thermoplastic composition according to any one of claims 1-12.
number: 15
text: A method for producing a shaped article comprising steps of:
number: 16
text: A method for covering a substrate comprising steps of:
Office action: search_report, dated 2020-12-30
Rejection reasons: novelty_epc_54
inventive_step_epc_56
Prior art cited: ref_id: WO2012052429A1
ref_type: patent
severity: background
ref_id: WO2015055433A1
ref_type: patent
severity: background
ref_id: WO2012152803A1
ref_type: patent
severity: background
ref_id: WO2018058344A1
ref_type: patent
severity: background
ref_id: WO2013144060A1
ref_type: patent
severity: background
ref_id: EP3438184A1
ref_type: patent
severity: background
ref_id: WO2012152803
ref_type: patent
severity: novelty_destroying
ref_id: WO2013144060
ref_type: patent
severity: novelty_destroying
ref_id: WO2015055433
ref_type: patent
severity: novelty_destroying
ref_id: WO2018058344
ref_type: patent
severity: novelty_destroying
ref_id: EP3438184
ref_type: patent
severity: obviousness
Final disposition: pending (2020-12-30)