Stock material or miscellaneous articles – Composite – Of addition polymer from unsaturated monomers
Patent
1986-09-12
1988-02-16
Buffalow, Edith
Stock material or miscellaneous articles
Composite
Of addition polymer from unsaturated monomers
428412, 428483, 428518, 5253341, B32B 2708
Patent
active
047255064
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
This invention relates to novel chlorinated polyolefins. More particularly, the present invention relates to adhesives which can exhibit excellent adhesion characteristics even in high temperature atmospheres in laminating a chlorine-containing polymer or an aromatic polymer and a polyolefin.
BACKGROUND ART
Chlorine-containing polymers [e.g. polyvinyl chloride (PVC), polyvinylidene chloride (PVDC)]and aromatic polymers (e.g. polyesters, polycarbonates, polystyrenes, polyphenylene oxides) are widely used in applications such as food containers, packaging materials, daily sundries, automotive interior trim parts, building materials, industrial materials and the like.
In some of these applications which require such properties as chemicals resistance, water resistance, hot-water resistance and gas barrier property, lamination of said chlorine-containing polymer or said aromatic polymer and a polyolefin (e.g. polyethylene, polypropylene) has been tried in order to allow the chlorine-containing polymer or the aromatic polymer to have said properties. However, no adhesive having excellent adhesion characteristics at high temperature has been developed yet. For instance, when an epoxy groupcontaining polyolefin known as a conventional adhesive polyolefin is used as an adhesive for lamination of a polyolefin and an aromatic polymer, no excellent adhesion characteristics can be obtained. Further, in direct lamination of an aromatic polymer and said modified polyolefin, no excellent adhesion characteristics can be obtained, either.
On the other hand, it is well known to use chlorinated polyethylene as an adhesive for adhered polymers mentioned above.
Japanese Patent Publication No. 18891/62 discloses a method wherein in bonding a film or sheet of a halogenated vinyl or vinylidene polymer to a polyolefin film or sheet, the back side of the polyolefin film or sheet is halogenated and the two films or sheets are directly melt-bonded.
Japanese Patent Publication No. 27236/70 discloses a method wherein a chlorinated ethylene polymer having a chlorine content of 33 to 55% by weight, an oxygen content of 0 to 3.0% by weight, a crystallinity of 1% or lower and an inherent viscosity of 0.2 to 1.8 is used as an adhesive for plasticized vinyl chloride polymers.
Japanese Patent Publication No. 47292/72 discloses a hot-melt adhesive consisting of 100 parts by weight of essentially amorphous chlorinated polyethylene containing 30 to 65% by weight of chlorine and obtained by chlorinating high density polyethylene at a temperature of 100.degree. C. or higher, and 0.5 to 5 parts by weight of an organic peroxide.
Japanese Patent Publication No. 41677/76 (corresponding to U.S. Pat. Nos. 3532795 and 3549389) describes a method wherein a polyolefin layer and a barrier layer, the main portion of which is composed of vinylidene chloride, are bonded with one of several adhesives including chlorinated polyethylene to produce a packaging film.
Japanese Laid-Open Patent Publication No. 81379/81 proposes chlorinated polyethylene having a chlorine content of 10 to 50% by weight and a polymer composition composed mainly of said chlorinated polyethylene, for use as an adhesive for bonding of a polyvinyl chloride mixture and a polyethylene.
Japanese Patent Publication No. 1710/83 discloses a resin composition comprising 100 parts by weight of a carboxyl-modified ethylene/vinyl acetate copolymer and 10 to 300 parts by weight of chlorinated polyethylene, for use as an adhesive for bonding a polyester resin to itself or to an other substrate.
Thus, the above prior art references describe that chlorinated polyethylene can be used as an adhesive singly or in combination with an other component. The chlorinated polyethylenes used in the prior art contain chlorine in an amount of at least 10% and, in some cases, as high as 60% in order to reduce the crystallinity of polyethylene and to impart adhesive property to the polyethylene. For instance, in Japanese Laid-Open Patent Publication No. 81379/81 mentioned above, there is used, as an
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patent: 3398046 (1968-08-01), Fowler et al.
patent: 3874987 (1975-04-01), Young
patent: 4376799 (1983-03-01), Tusim
patent: 4547554 (1985-10-01), Kadomatsu
patent: 4612252 (1986-09-01), Sagane
patent: 4677166 (1987-06-01), Ozaki et al.
Buffalow Edith
Mitsui Petrochemical Industries Ltd.
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