Stock material or miscellaneous articles – Composite – Of polyamide
Reexamination Certificate
2000-09-21
2002-04-02
Yoon, Tae H. (Department: 1714)
Stock material or miscellaneous articles
Composite
Of polyamide
C428S477700, C428S424200, C428S500000
Reexamination Certificate
active
06365282
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a resin composition and a laminated film, and more particularly, to a resin composition and a laminated film (or sheet) comprising the resin composition, which is inhibited from generating hydrocyanic acid upon the combustion.
With the recent rise in levels of living and income, many new goods have been marketed, so that rich material civilization has been realized. On the other hand, the amount of domestic wastes discharged has been rapidly increased. As a result, waste disposal treatments have caused significant social problems.
A considerable part of these wastes is occupied by those derived from synthetic resins. In particular, it has been reported that vinyl chloride resin wastes have a risk of generating dioxins upon incineration thereof. In addition, it has been recognized that synthetic resins containing nitrogen atom(s) in structural units thereof such as polyamide resins or polyurethane resins generate hydrocyanic acid as combustion product gas upon the combustion or incineration as described in Morimoto, “Composition of High-Polymer Combustion Product Gas”, HIGH POLYMER, Vol. 22, No. 253, p. 192 (1973). Further, it is also known that laminated films (or sheets) having a constituent layer composed of polyamide resin, which have been extensively used as wrapping materials, also generate hydrocyanic acid upon the combustion or incineration.
Such synthetic resins containing nitrogen atom(s) in structural units thereof have been widely used in ordinary domestic applications such as interior materials, e.g., carpets, curtains, wall papers or decorative papers for decorative sheets. However, hydrocyanic acid generated from these resins upon firing tend to sometimes endanger human life.
As a result of the present inventors' earnest studies for solving the above problems, it has been found that by incorporating an iron compound catalyst comprising iron oxide hydroxide particles or iron oxide particles, which has an average particle size of 0.01 to 2.0 &mgr;m, into a synthetic resin, the obtained resin composition can be inhibited from generating hydrocyanic acid upon the combustion or incineration even though the synthetic resins contain nitrogen atom(s) in structural units thereof. The present invention has been attained on the basis of this finding.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide a resin composition which is free from the generation of hydrocyanic acid upon the combustion or incineration notwithstanding synthetic resins containing nitrogen atom(s) in structural units thereof are used.
It is another object of the present invention to provide a laminated film (or sheet) which is free from the generation of hydrocyanic acid upon the combustion or incineration notwithstanding synthetic resins containing nitrogen atom(s) in structural units thereof are used, and exhibits a sufficient transparency and a good coloring property required for interior materials or wrapping materials.
In a first aspect of the present invention, there is provided a resin composition comprising:
100 parts by weight of a thermoplastic synthetic resin containing nitrogen atom(s) in structural units thereof; and
0.1 to 20 parts by weight of an iron compound catalyst comprising at least one iron oxide-based compound selected from the group consisting of iron oxide hydroxide particles or iron oxide particles, which has an average particle size of 0.05 to 2.0 &mgr;m; and has a catalytic activity capable of converting not less than 15% by mole of carbon monoxide into carbon dioxide when measured under such test conditions that while passing an argon gas as a carrier gas, carbon monoxide supplied in a pulse amount of 6.1×10
−7
mole, is contacted with 2.8×10
−4
mole of iron oxide-based particles obtained by heat-treating said iron compound catalyst at 800° C. for 15 minutes in air (pretreatment), at 250° C. at a space velocity of 42,400 h
−1
using a pulse catalytic reactor.
In a second aspect of the present invention, there is provided a laminated film comprising:
a synthetic resin layer comprising a synthetic resin containing nitrogen atom(s) in structural units thereof; and
a layer comprising a polyolefin-based resin, at least one of the synthetic resin layer comprising a synthetic resin containing nitrogen atom(s) in structural units thereof and polyolefin-based resin layer, which contain an iron compound catalyst comprising at least one iron oxide-based compound selected from the group consisting of iron oxide hydroxide particles or iron oxide particles, which has an average particle size of 0.05 to 2.0 &mgr;m; and has a catalytic activity capable of converting not less than 15% by mole of carbon monoxide into carbon dioxide when measured under the test conditions as set forth above.
In a third aspect of the present invention, there is provided a laminated film comprising:
a synthetic resin layer comprising a synthetic resin containing nitrogen atom(s) in structural units thereof; and
a layer of a resin composition comprising 100 parts by weight of a polyolefin-based resin and 0.2 to 20 parts by weight of an iron compound catalyst,
which iron compound catalyst comprises at least one iron oxide-based compound selected from the group consisting of iron oxide hydroxide particles or iron oxide particles, which has an average particle size of 0.05 to 2.0 &mgr;m; and has a catalytic activity capable of converting not less than 15% by mole of carbon monoxide into carbon dioxide when measured under the test conditions as set forth above.
In a fourth aspect of the present invention, there is provided a laminated film comprising:
a synthetic resin layer comprising a resin composition comprising 100 parts by weight of a synthetic resin containing nitrogen atom(s) in structural units thereof and 0.2 to 20 parts by weight of an iron compound; and
a layer comprising a polyolefin-based resin which iron compound catalyst comprises at least one iron oxide-based compound selected from the group consisting of iron oxide hydroxide particles or iron oxide particles, which has an average particle size of 0.05 to 2.0 &mgr;m; and has a catalytic activity capable of converting not less than 15% by mole of carbon monoxide into carbon dioxide when measured under the test conditions as set forth above.
In a fifth aspect of the present invention, there is provided a laminated film comprising:
a synthetic resin layer comprising a resin composition comprising 100 parts by weight of a synthetic resin containing nitrogen atom(s) in structural units thereof and 0.2 to 20 parts by weight of an iron compound; and
a layer of a resin composition comprising 100 parts by weight of a polyolefin-based resin and 0.2 to 20 parts by weight of an iron compound catalyst.
which iron compound catalyst comprises at least one iron oxide-based compound selected from the group consisting of iron oxide hydroxide particles or iron oxide particles, which has an average particle size of 0.05 to 2.0 &mgr;m; and has a catalytic activity capable of converting not less than 15% by mole of carbon monoxide into carbon dioxide when measured under the test conditions as set forth above,
the total amount of the iron compound catalyst being 0.4 to 20.2 parts by weight based on 100 parts by weight of the synthetic resin containing nitrogen atom(s) in structural units thereof and polyolefin-based resin.
In a sixth aspect of the present invention, there is provided a method of using an iron compound catalyst for inhibiting percentage of the generation of hydrocyanic acid, which iron compound catalyst comprising at least one iron oxide-based compound selected from the group consisting of iron oxide hydroxide particles or iron oxide particles, which has an average particle size of 0.05 to 2.0 &mgr;m; and has a catalytic activity capable of converting not less than 15% by mole of carbon monoxide into carbon dioxide when measured under such test conditions that while passing an argon gas as a carrier gas, carbon monoxide supplied in a p
Imai Tomoyuki
Matsui Toshiki
Shimuzu Toshiaki
Tanaka Suminori
Nixon & Vanderhye
Toda Kogyo Corporation
Yoon Tae H.
LandOfFree
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