Polymeric resins impregnated with insect repellants
First Claim
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1. A non-foamed insect repellent concentrate, comprising:
- a polymeric resin; and
an insect repellent, wherein said insect repellent is homogeneously and finely dispersed throughout said polymeric resin without a blowing agent and wherein said dispersed insect repellent exists as globules of less than 1 micron in size within said resin which provides a non-foamed matrix for said repellent.
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Abstract
The present invention relates to non-foamed insect repellent concentrates that include polymeric resins that have been impregnated with insect repellents and methods for making same. Additionally, the present invention relates to products formed from insect repellent impregnated polymeric resins and methods for making same. Preferred products such as, for example, plastic tablecloths, plastic garbage receptacles and plastic garbage lawn bags are described.
51 Citations
35 Claims
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1. A non-foamed insect repellent concentrate, comprising:
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a polymeric resin; and
an insect repellent, wherein said insect repellent is homogeneously and finely dispersed throughout said polymeric resin without a blowing agent and wherein said dispersed insect repellent exists as globules of less than 1 micron in size within said resin which provides a non-foamed matrix for said repellent. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 30, 31, 32, 33, 35)
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17. A process for preparing a non-foamed insect repellent concentrate, the process comprising the following steps:
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introducing a polymeric resin into an extruder;
melting the polymeric resin in the extruder, the temperature of the extruder being maintained at a temperature about 10°
C. above the melting temperature of the polymeric resin;
adding an insect repellent under pressure into the extruder at a point downstream from the point where the polymeric resin is introduced into the extruder;
mixing the melted resin and the insect repellent so that a homogenous dispersion is obtained having insect repellent globules dispersed throughout the melted resin; and
extruding the insect repellent containing polymeric resin from the extruder.
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29. A product exhibiting steady state release of an insect repellent, comprising:
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a non-foamed insect repellent concentrate comprising;
a polymeric resin; and
an insect repellent, wherein said insect repellent is homogeneously and finely dispersed throughout said polymeric resin without a blowing agent and wherein said dispersed insect repellent exists as globules of less than 1 micron in size within said resin which provides a non-foamed matrix for said repellent; and
a polymeric resin.
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34. A product exhibiting steady state release of an insect repellent, comprising:
a non-foamed insect repellent concentrate comprising;
a polymeric resin; and
an insect repellent, wherein said insect repellent is homogeneously and finely dispersed throughout said polymeric resin without a blowing agent and wherein said dispersed insect repellent exists as globules of less than 1 micron in size within said resin which provides a non-foamed matrix for said repellent.
Specification