US5331054A
Expired / Lapsed
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Propylene copolymer composition
Assignee: Mitsubishi Chemical Corp
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Filing: 1992-10-19
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Granted: 1994-07-19
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Expires: 2012-10-19
Abstract
Abstract A propylene copolymer composition enabling the production of a film having excellent low-temperature heat sealing ability and blocking resistance, is obtained by blending 1 to 70 wt % of a component A and 30 to 99 wt % of a component B. The component A comprises either a propylene homopolymer or a copolymer of propylene with not more than 10 mol % of ethylene or an a-olefin having a carbon number of 4 to 20, and has a molecular weight distribution (Mw/Mn) of not more than 3, a mean elution temperature of 40 DEG to 100 DEG C., and an elution dispersion degree ( sigma value) of not more than 10. The component B comprises a copolymer of propylene with ethylene and/or an alpha -olefin having a carbon number of 4 to 20, and has a molecular weight distribution (Mw/Mn) of 3.5 to 10.
Inventors
- 👤 Takashi Fujita
- 👤 Toshihiko Sugano
- 👤 Hajime Mizuno
- 👤 Hideshi Uchino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:04
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/18; C08L; C08L23/00; C08L23/02; C08L23/10; C08L23/14; C08L23/142; C08J2323/00; C08J2323/02; C08J2323/10; C08L2205/00; C08L2205/02; Y; Y10; Y10S; Y10S526/00; Y10S526/943; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31913
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
237 words
A polypropylene composition containing 3 to 50% by weight of the following propylene polymer (A), and 97 to 50% by weight of the following propylene random copolymer (B): propylene polymer (A): a propylene polymer having the following properties (a) to (c): (a) the propylene polymer is either a propylene homopolymer or a propylene polymer containing not more than 10 mol % of ethylene or an α-olefin having a carbon number of 4 to 20 and having a number average molecular weight (Mn) of 10,000 to 300,000; (b) the propylene polymer has a molecular weight distribution (Mw/Mn) within the range of 1 to 2.8; and (c) the propylene polymer has a mean elution temperature (T 50 ) ranging from 50° to 90° C., and an elution dispersion degree (σ value) of 0.1 to not more than 9, propylene random copolymer (B): a propylene random copolymer comprising propylene, and ethylene and/or an α-olefin having a carbon number of 4 to 20, the propylene random copolymer having the following properties (d) and (e): (d) the propylene random copolymer has 90 to 99.5 mol % of structural units obtained from propylene, and 0.5 to 10 mol % of structural units obtained from ethylene and/or an α-olefin having a carbon number of 4 to 20; and has a number average molecular weight (Mn) of 10,000 to 200,000; (e) the propylene random copolymer has a molecular weight distribution (Mw/Mn) of 4 to 9.
Claim 2
Dependent Claim
237 words
A polypropylene composition containing 3 to 50% by weight of the following propylene polymer (A), and 97 to 50% by weight of the following propylene random copolymer (B): propylene polymer (A): a propylene polymer having the following properties (a) to (c): (a) the propylene polymer is either a propylene homopolymer or a propylene polymer containing not more than 10 mol % of ethylene or an α-olefin having a carbon number of 4 to 20 and having a number average molecular weight (Mn) of 10,000 to 300,000; (b) the propylene polymer has a molecular weight distribution (Mw/Mn) within the range of 1 to 2.8; and (c) the propylene polymer has a mean elution temperature (T 50 ) ranging from 50° to 90° C., and an elution dispersion degree (σ value) of 0.1 to not more than 9, propylene random copolymer (B): a propylene random copolymer comprising propylene, and ethylene and/or an α-olefin having a carbon number of 4 to 20, the propylene random copolymer having the following properties (d) and (e): (d) the propylene random copolymer has 90 to 99.5 mol % of structural units obtained from propylene, and 0.5 to 10 mol % of structural units obtained from ethylene and/or an α-olefin having a carbon number of 4 to 20; and has a number average molecular weight (Mn) of 10,000 to 200,000; (e) the propylene random copolymer has a molecular weight distribution (Mw/Mn) of 4 to 9.
Claim 3
Dependent Claim
236 words
A polypropylene composition containing 3 to 50% by weight of the following propylene polymer (A), and 97 to 50% by weight of the following propylene random copolymer (B): propylene polymer (A): a propylene polymer having the following properties (a) to (c): (a) the propylene polymer is either a propylene homopolymer or a propylene polymer containing less than 0.5 mol % of ethylene or an α-olefin having a carbon number of 4 to 20 and having a number average molecular weight (Mn) of 10,000 to 300,000; (b) the propylene polymer has a molecular weight distribution (Mw/Mn) within the range of 1 to 2.8; and (c) the propylene polymer has a mean elution temperature (T 50 ) ranging from 40° to 100° C., and an elution dispersion degree (σ value) of 0.1 to not more than 9, propylene random copolymer (B): a propylene random copolymer comprising propylene, and ethylene and/or an α-olefin having a carbon number of 4 to 20, the propylene random copolymer having the following properties (d) and (e): (d) the propylene random copolymer has 90 to 99.5 mol % of structural units obtained from propylene, and 0.5 to 10 mol % of structural units obtained from ethylene and/or an α-olefin having a carbon number of 4 to 20; and has a number average molecular weight (Mn) of 10,000 to 200,000; (e) the propylene random copolymer has a molecular weight distribution (Mw/Mn) of 4 to 9.
Claim 4
Dependent Claim
236 words
A polypropylene composition containing 3 to 50% by weight of the following propylene polymer (A), and 97 to 50% by weight of the following propylene random copolymer (B): propylene polymer (A): a propylene polymer having the following properties (a) to (c): (a) the propylene polymer is either a propylene homopolymer or a propylene polymer containing less than 0.5 mol % of ethylene or an α-olefin having a carbon number of 4 to 20 and having a number average molecular weight (Mn) of 10,000 to 300,000; (b) the propylene polymer has a molecular weight distribution (Mw/Mn) within the range of 1 to 2.8; and (c) the propylene polymer has a mean elution temperature (T 50 ) ranging from 40° to 100° C., and an elution dispersion degree (σ value) of 0.1 to not more than 9, propylene random copolymer (B): a propylene random copolymer comprising propylene, and ethylene and/or an α-olefin having a carbon number of 4 to 20, the propylene random copolymer having the following properties (d) and (e): (d) the propylene random copolymer has 90 to 99.5 mol % of structural units obtained from propylene, and 0.5 to 10 mol % of structural units obtained from ethylene and/or an α-olefin having a carbon number of 4 to 20; and has a number average molecular weight (Mn) of 10,000 to 200,000; (e) the propylene random copolymer has a molecular weight distribution (Mw/Mn) of 4 to 9.
Claim 5
Dependent Claim
274 words
A copolymer composition containing 1 to 70% by weight of the following propylene copolymer (A), and 99 to 30% by weight of the following propylene random copolymer (B): propylene random copolymer (A): a propylene random copolymer (A) comprising propylene, and ethylene and/or an α-olefin having a carbon number of 4 to 20, the propylene random copolymer (A) having the following properties (a) to (c): (a) the propylene random copolymer has 90 to 99.5 mol % of structural units obtained from propylene, and 0.5 to 10 mol % of structural units obtained from ethylene and/or an α-olefin having a carbon number of 4 to 20 and having a number average molecular weight (Mn) of 10,000 to 300,000; (b) the propylene random copolymer (A) has a molecular weight distribution (Mw/Mn) of within the range of 1 to 2.8; and (c) the propylene random copolymer (A) has a mean elution temperature (T 50 ) ranging from 50° to 90° C., and an elution dispersion degree (σ value) of not more than 10, propylene random copolymer (B): a propylene random copolymer (B) comprising propylene, and ethylene and/or an α-olefin having a carbon number of 4 to 20, the propylene random copolymer (B) having the following properties (d) and (e): (d) the propylene random copolymer has 90 to 99.5 mol % of structural units obtained from propylene, and 0.5 to 10 mol % of structural units obtained from ethylene and/or an α-olefin having a carbon number of 4 to 20; and has a number average molecular weight (Mn) of 10,000 to 200,000; and (e) the propylene random copolymer (B) has a molecular weight distribution (Mw/Mn) of 4 to 9.
Claim 6
Dependent Claim
274 words
A copolymer composition containing 1 to 70% by weight of the following propylene copolymer (A), and 99 to 30% by weight of the following propylene random copolymer (B): propylene random copolymer (A): a propylene random copolymer (A) comprising propylene, and ethylene and/or an α-olefin having a carbon number of 4 to 20, the propylene random copolymer (A) having the following properties (a) to (c): (a) the propylene random copolymer has 90 to 99.5 mol % of structural units obtained from propylene, and 0.5 to 10 mol % of structural units obtained from ethylene and/or an α-olefin having a carbon number of 4 to 20 and having a number average molecular weight (Mn) of 10,000 to 300,000; (b) the propylene random copolymer (A) has a molecular weight distribution (Mw/Mn) of within the range of 1 to 2.8; and (c) the propylene random copolymer (A) has a mean elution temperature (T 50 ) ranging from 50° to 90° C., and an elution dispersion degree (σ value) of not more than 10, propylene random copolymer (B): a propylene random copolymer (B) comprising propylene, and ethylene and/or an α-olefin having a carbon number of 4 to 20, the propylene random copolymer (B) having the following properties (d) and (e): (d) the propylene random copolymer has 90 to 99.5 mol % of structural units obtained from propylene, and 0.5 to 10 mol % of structural units obtained from ethylene and/or an α-olefin having a carbon number of 4 to 20; and has a number average molecular weight (Mn) of 10,000 to 200,000; and (e) the propylene random copolymer (B) has a molecular weight distribution (Mw/Mn) of 4 to 9.
Claim 7
Dependent Claim
202 words
A polypropylene composition containing 3 to 50% by weight of the following propylene copolymer (A), and 97 to 50% by weight of the following propylene random copolymer (B): propylene polymer (A): a propylene polymer having the following properties (a) to (c): (a) the propylene polymer is either a propylene homopolymer or a propylene polymer containing not more than 10 mol % of ethylene having a number average molecular weight (Mn) of 10,000 to 300,000; (b) the propylene polymer has a molecular weight distribution (Mw/Mn) within the range of 1 to 2.8; and (c) the propylene polymer has a mean elution temperature (T 50 ) ranging from 50° to 90° C., and an elution dispersion degree (σ value) of 0.1 to not more than 9, propylene random copolymer (B): a propylene random copolymer comprising of propylene and ethylene and having the following properties (d) and (e): (d) the propylene random copolymer has 90 to 99.5 mol % of structural units obtained from propylene, and 0.5 to 10 mol % of structural units obtained from ethylene and has a number average molecular weight (Mn) of 10,000 to 200,000; and (e) the propylene random copolymer has a molecular weight distribution (Mw/Mn) of 4 to 9.
Claim 8
Dependent Claim
202 words
A polypropylene composition containing 3 to 50% by weight of the following propylene copolymer (A), and 97 to 50% by weight of the following propylene random copolymer (B): propylene polymer (A): a propylene polymer having the following properties (a) to (c): (a) the propylene polymer is either a propylene homopolymer or a propylene polymer containing not more than 10 mol % of ethylene having a number average molecular weight (Mn) of 10,000 to 300,000; (b) the propylene polymer has a molecular weight distribution (Mw/Mn) within the range of 1 to 2.8; and (c) the propylene polymer has a mean elution temperature (T 50 ) ranging from 50° to 90° C., and an elution dispersion degree (σ value) of 0.1 to not more than 9, propylene random copolymer (B): a propylene random copolymer comprising of propylene and ethylene and having the following properties (d) and (e): (d) the propylene random copolymer has 90 to 99.5 mol % of structural units obtained from propylene, and 0.5 to 10 mol % of structural units obtained from ethylene and has a number average molecular weight (Mn) of 10,000 to 200,000; and (e) the propylene random copolymer has a molecular weight distribution (Mw/Mn) of 4 to 9.
Claim 9
Dependent Claim
203 words
A polypropylene composition containing 3 to 50% by weight of the following propylene polymer (A), and 97 to 50% by weight of the following propylene random copolymer (B): propylene polymer (A): a propylene polymer having the following properties (a) to (c): (a) the propylene polymer is either a propylene homopolymer or a propylene polymer containing not more than 0.5 mol % of ethylene and having a number average molecular weight (Mn) of 10,000 to 300,000; (b) the propylene polymer has a molecular weight distribution (Mw/Mn) within the range of 1 to 2.8; and (c) the propylene polymer has a mean elution temperature (T 50 ) ranging from 50° to 90° C., and an elution dispersion degree (σ value) of 0.1 to not more than 9, propylene random copolymer (B): a propylene random copolymer consisting of propylene and ethylene and having the following properties (d) and (e): (d) the propylene random copolymer has 90 to 99.5 mol % of structural units obtained from propylene, and 0.5 to 10 mol % of structural units obtained from ethylene and has a number average molecular weight (Mn) of 10,000 to 200,000; and (e) the propylene random copolymer has a molecular weight distribution (Mw/Mn) of 4 to 9.
Claim 10
Dependent Claim
203 words
A polypropylene composition containing 3 to 50% by weight of the following propylene polymer (A), and 97 to 50% by weight of the following propylene random copolymer (B): propylene polymer (A): a propylene polymer having the following properties (a) to (c): (a) the propylene polymer is either a propylene homopolymer or a propylene polymer containing not more than 0.5 mol % of ethylene and having a number average molecular weight (Mn) of 10,000 to 300,000; (b) the propylene polymer has a molecular weight distribution (Mw/Mn) within the range of 1 to 2.8; and (c) the propylene polymer has a mean elution temperature (T 50 ) ranging from 50° to 90° C., and an elution dispersion degree (σ value) of 0.1 to not more than 9, propylene random copolymer (B): a propylene random copolymer consisting of propylene and ethylene and having the following properties (d) and (e): (d) the propylene random copolymer has 90 to 99.5 mol % of structural units obtained from propylene, and 0.5 to 10 mol % of structural units obtained from ethylene and has a number average molecular weight (Mn) of 10,000 to 200,000; and (e) the propylene random copolymer has a molecular weight distribution (Mw/Mn) of 4 to 9.
Claim 11
Dependent Claim
229 words
A copolymer composition containing 3 to 50% by weight of the following propylene polymer (A), and 97 to 50% by weight of the following propylene random copolymer (B): propylene random copolymer (A): a propylene random copolymer (A) consisting of propylene and ethylene and having the following properties (a) to (c): (a) the propylene random copolymer has 90 to 99.5 mol % of structural units obtained from propylene, and 0.5 to 10 mol % of structural units obtained from ethylene and has a number average molecular weight (Mn) of 10,000 to 300,000; (b) the propylene random copolymer (A) has a molecular weight distribution (Mw/Mn) of within a range of 1 to 2.8; and (c) the propylene random copolymer (A) has a mean elution temperature (T 50 ) ranging from 50° to 90° C., and an elution dispersion degree (σ value) of 0.1 or more and not more than 9, propylene random copolymer (B): a propylene random copolymer (B) consisting of propylene and ethylene and having the following properties (d) and (e): (d) the propylene random copolymer (B) has 90 to 99.5 mol % of structural units obtained from propylene, and 0.5 to 10 mol % of structural units obtained from ethylene and has a number average molecular weight (Mn) of 10,000 to 200,000; and (e) the propylene random copolymer (B) has a molecular weight distribution (Mw/Mn) of 4 to 9.
Claim 12
Dependent Claim
229 words
A copolymer composition containing 3 to 50% by weight of the following propylene polymer (A), and 97 to 50% by weight of the following propylene random copolymer (B): propylene random copolymer (A): a propylene random copolymer (A) consisting of propylene and ethylene and having the following properties (a) to (c): (a) the propylene random copolymer has 90 to 99.5 mol % of structural units obtained from propylene, and 0.5 to 10 mol % of structural units obtained from ethylene and has a number average molecular weight (Mn) of 10,000 to 300,000; (b) the propylene random copolymer (A) has a molecular weight distribution (Mw/Mn) of within a range of 1 to 2.8; and (c) the propylene random copolymer (A) has a mean elution temperature (T 50 ) ranging from 50° to 90° C., and an elution dispersion degree (σ value) of 0.1 or more and not more than 9, propylene random copolymer (B): a propylene random copolymer (B) consisting of propylene and ethylene and having the following properties (d) and (e): (d) the propylene random copolymer (B) has 90 to 99.5 mol % of structural units obtained from propylene, and 0.5 to 10 mol % of structural units obtained from ethylene and has a number average molecular weight (Mn) of 10,000 to 200,000; and (e) the propylene random copolymer (B) has a molecular weight distribution (Mw/Mn) of 4 to 9.
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