# US 9,518,179 B2 · Modifier composition for polyolefin, polyolefin for packaging and flexible packaging film > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,518,179 B2 - Document ID: US9518179B2 - Status: Granted - Kind: B2 - Application number: 14/111,594 - Filed: 2011-04-14 - Published: 2014-02-06 - Granted: 2016-12-13 - Earliest claimed: 2011-04-14 - Assignees: Beijing Institute of Graphic Communication - Applicants: Wencai Xu; Dongli Li; Yabo Fu - Inventors: Wencai Xu; Dongli Li; Yabo Fu - Web page: https://patentgrep.com/patent/US9518179B2 ## CPC - C08L 31/04: Homopolymers or copolymers of vinyl acetate - B65D 65/40: Applications of laminates for particular packaging purposes {(B65D1/0215, B65D1/28, B65D3/22, B65D5/0281, B65D5/563, B65D9/30, B65D29/02, B65D31/02, B65D75/26, B65D77/2024, B65D81/1275, B65D81/3811, B65D81/3823, B65D81/3834, B65D81/3846, B65D81/3858, B65D81/3874, B65D81/3886, B65D81/3897 take precedence; laminates per se or laminated packages characterised by the composition or)} - C08K 3/36: Silica - C08L 23/0815: {with aliphatic 1-olefins containing one carbon-to-carbon double bond} - C08L 23/0853: Ethylene vinyl acetate copolymers - C08L 23/12: Polypropene - C08L 23/14: Copolymers of propene (C08L23/16 takes precedence) - C08L 29/04: Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids - C08L 33/02: Homopolymers or copolymers of acids; Metal or ammonium salts thereof - C08F 220/06: Acrylic acid; Methacrylic acid; Metal salts or ammonium salts thereof - C08F 220/14: Methyl esters {, e.g. methyl (meth)acrylate} - C08L 2203/16: used for films - C08L 2205/035: containing four or more polymers in a blend - C08L 2310/00: Masterbatches - Y10T 428/31667: Next to addition polymer from unsaturated monomers, or aldehyde or ketone condensation product - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) - B65D: CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES - C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09) - C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract The disclosure relates to a modifier composition for polyolefin, a polyolefin for packaging and a flexible packaging film. The disclosure relates to a modifier composition for polyolefin, including: (A) nano-silicon dioxide; (B) polyvinyl alcohol; (C) acrylic copolymer; and (D) Ethylene-Vinyl Acetate (EVA) copolymer. The disclosure also relates to a polyolefin for packaging, including: a polyolefin resin and a modifier composition of the polyolefin provided by the disclosure. The disclosure also relates to a flexible packaging film, of which at least a part is made of the polyolefin for packaging of the disclosure. The modifier composition of the disclosure can obviously improve the performance in the aspect of reducing residue of solvent in the polyolefin flexible packaging film. ## Claims ### Claim 1 A polyolefin composition, comprising: a polyolefin resin; a modifier composition comprising, a nano-silicon dioxide, present in an amount of about 10 to about 50 parts by weight of said modifier composition; a polyvinyl alcohol, present in an amount of about 1 to about 5 parts by weight of said modifier composition; an acrylic copolymer, present in an amount of about 2 to about 15 parts by weight of said modifier composition; and an ethylene-vinyl acetate (EVA) copolymer, present in an amount of about 45 to about 75 parts by weight of said modifier composition. ### Claim 2 (depends on 1) The polyolefin composition according to claim 1, comprising: nano-silicon dioxide, which is 15-50 parts by weight of said modifier composition; polyvinyl alcohol, which is 1.5-5 parts by weight of said modifier composition; acrylic copolymer, which is 3-15 parts by weight of said modifier composition; and EVA copolymer, which is 45-74 parts by weight of said modifier composition. ### Claim 3 (depends on 2) The modifier composition according to claim 2, comprising: nano-silicon dioxide, which is 19-50 parts by weight of said modifier composition polyvinyl alcohol, which is 1.5-4 parts by weight of said modifier composition; acrylic copolymer which is 3.9-15 parts by weight of said modifier composition; and ethylene-vinyl acetate (EVA) copolymer, which is 47-73.5 parts by weight of said modifier composition. ### Claim 4 (depends on 1) The polyolefin composition according to claim 1, wherein, the degree of polymerization of the polyvinyl alcohol is 1500-2000, and the alcoholysis degree of the polyvinyl alcohol is greater than or equal to 98%. ### Claim 5 (depends on 1) The polyolefin composition according to claim 1, wherein, the content of vinyl acetate in the EVA copolymer is 70%-95% by weight. ### Claim 6 (depends on 1) The polyolefin composition according to claim 1, wherein, the acrylic copolymer is a copolymer of (meth) acrylic ester and (meth) acrylic acid and/or (meth) acrylic salt. ### Claim 7 (depends on 6) The polyolefin composition according to claim 6, wherein, the degree of polymerization of the acrylic copolymer is 150-200, and the monomer molar content of the (meth) acrylic acid and/or (meth) acrylic salt is 10%-30%. ### Claim 8 (depends on 6) The polyolefin composition according to claim 6, wherein, the (meth) acrylic ester is (meth) acrylic acid alkyl ester. ### Claim 9 (depends on 8) The polyolefin composition according to claim 8, wherein, (meth) acrylic acid alkyl ester is (meth) acrylic acid C1-15 alkyl ester. ### Claim 10 (depends on 6) The polyolefin composition according to claim 6, wherein, the (meth) acrylic ester is selected from one or the mixture of at least two of: methyl acrylate, ethyl acrylate, propyl acrylate, butyl acrylate, pentyl acrylate, hexyl acrylate, acrylate-2-ethyl hexyl ester, methyl methacrylate, ethyl methacrylate, propyl methacrylate, butyl methacrylate, pentyl methacrylate, hexyl methacrylate, or methacrylate-2-ethyl hexyl ester. ### Claim 11 (depends on 6) The polyolefin composition according to claim 6, wherein, the (meth) acrylic acid and/or (meth) acrylic salt is/are selected from acrylic acid, methacrylic acid or the salts thereof, or the mixture of at least two thereof. ### Claim 12 (depends on 1) The polyolefin composition according to claim 1, wherein, the polyolefin resin is selected from polyethylene (PE), polypropylene (PP) and blends of PE and PP. ### Claim 13 (depends on 12) The polyolefin composition according to claim 12, wherein, the PE is selected from high density PE (HDPE) and low density PE (LDPE). ### Claim 14 (depends on 1) The polyolefin composition according to claim 1, wherein, in each 100 parts of the polyolefin resin by weight, the additive amount of the modifier composition of the polyolefin is 0.5-5 parts by weight. ### Claim 15 (depends on 1) The polyolefin composition according to claim 1, wherein, when the crystallinity of the polyolefin resin is greater than or equal to 90%, in each 100 parts of the polyolefin resin by weight, the dosage of the modifier composition of the polyolefin is 0.5-1.0 part by weight. ### Claim 16 A flexible packaging film comprising: an upper layer; at least one core layer; a lower layer; wherein said upper layer and said lower layer comprise a polyolefin composition, said polyolefin composition comprising: a polyolefin resin; a modifier composition comprising, a nano-silicon dioxide, present in an amount of about 10 to about 50 parts by weight of said modifier composition; a polyvinyl alcohol, present in an amount of about 1 to about 5 parts by weight of said modifier composition; an acrylic copolymer, present in an amount of about 2 to about 15 parts by weight of said modifier composition; and an ethylene-vinyl acetate (EVA) copolymer, present in an amount of about 45 to about 75 parts by weight of said modifier composition. ### Claim 17 (depends on 16) The flexible packaging film according to claim 16, wherein said core layer is selected from the group consisting of a Biaxially Oriented PP (BOPP) film and a Casting PP (CPP) film and said polyolefin resin of said upper and lower layers is polyethylene.