Stock material or miscellaneous articles – Composite – Of addition polymer from unsaturated monomers
Patent
1995-12-11
1998-12-22
Mulcahy, Peter D.
Stock material or miscellaneous articles
Composite
Of addition polymer from unsaturated monomers
428516, 524251, 524437, B32B 2700, C08J 517
Patent
active
058516824
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to a polyolefin resin composition and a resin film comprising the same. In particular, the present invention relates to a polyolefin resin composition which is excellent in weather resistance and thermal stability, and a resin film comprising the same which is excellent in weather resistance.
BACKGROUND ART
Over the years, the amount of the resins which are used outdoors and as automobile materials, construction materials, agricultural materials, etc. has rapidly increased.
Resins used outdoors have required weather resistance among properties. For example, an agricultural film is one agricultural material that is used in a green house or tunnel used in horticulture. Since a polyolefin resin film which is generally used as such an agricultural film, such as for example, a polyethylene film, or an ethylene-vinyl acetate copolymer film suffers from deterioration of a retention rate of elongation or tensile strength caused by an oxidation reaction when it is exposed the sun light in an air, improvement of its weather resistance is required. To fulfil this requirement, resin compositions or resin films containing various weathering stabilizers have been developed.
Among the various weathering stabilizers, hindered amine compounds are preferably used, since they can greatly suppress the deterioration of the physical properties of the resin compositions upon exposure to the outdoor conditions and the change of gloss or color tone, by the addition of a small amount (for example, Japanese Patent KOKAI Publication No. 86645/1984 corresponding to EP-A-107615 and U.S. Pat. No. 5,102,927, and Japanese Patent KOKAI Publication No. 167350/1990 corresponding to EP-A-389 640). Japanese Patent KOKAI Publication No. 41254/1981 discloses a thermoplastic resin film containing a hindered amine compound and inorganic fine particles which have a polarity and a surface area of 10 m.sup.2 /g or larger.
However, the above resin compositions containing the hindered amine compounds and the resin composition containing the hindered amine compound and the specific inorganic compound do not satisfactorily solve the problems of the deterioration of the compositions and the color change under the conditions during practical use (e.g. exposure to oxygen in the air, sun light, agrochemicals, acidic rain, etc.) or molding and processing conditions.
SUMMARY OF THE INVENTION
An object of the present invention is to provide a resin composition and a resin film which solve the above problems, in particular, a polyolefin resin composition having good weather resistance, and a resin film having good weather resistance and strength.
According to a first aspect of the present invention, there is provided a polyolefin resin composition comprising and m is a number satisfying 0.ltoreq.m.ltoreq.3, and
According to a second aspect of the present invention, there is provided a resin film comprising a polyolefin resin composition which comprises and m is a number satisfying 0.ltoreq.m.ltoreq.3, and
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be explained in detail.
The polyolefin resin (a) which constitutes the resin composition and the resin film of the present invention includes a homopolymer of an .alpha.-olefin, and a copolymer of different monomers comprising an .alpha.-olefin as a main component. Examples of the homopolymer are polyethylene, polypropylene, etc., and examples of the copolymer are ethylene/.alpha.-olefin copolymers such as ethylene/1-butene copolymer, ethylene/4-methyl-1-pentene copolymer, ethylene/1-hexene copolymer, etc.; ethylene-vinyl acetate copolymer; ethylene/acrylic acid copolymer; ethylene/methyl methacrylate copolymer; ethylene/vinyl acetate/methyl methacrylate copolymer; ionomer resins; and the like.
In the resin film of the present invention, polyethylene, the ethylene/.alpha.-olefin copolymers, and the ethylene/vinyl acetate copolymer containing 25 wt. % or less of vinyl acetate are preferred, in view of transparency, weather resistance, a
REFERENCES:
patent: 5063264 (1991-11-01), Nakajima
Database WPI, Derwent Publications Ltd., London, GB; AN 88-240205 XP002003864 & JP-A-63 175 072 (Mikado Kako), Jul. 19, 1988--Abstract.
Kotani Kozo
Kudo Aki
Nakagahara Makoto
Negawa Hideo
Sakaya Taiichi
Mulcahy Peter D.
Sumitomo Chemical Company Limited
LandOfFree
Polyolefin resin composition and resin film does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Polyolefin resin composition and resin film, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Polyolefin resin composition and resin film will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2044725