JP2675845B2 - Solid state thermosensitive polymer composition - Google Patents

Description

The present invention relates to devices that variably transmit light and radiant heat, and in particular to devices that are substantially solid state in nature.

In bright sunlight, large buildings, mostly made of glass, enclosed, with many glass windows, experience heat generation due to the transfer of heat from the sun through the glass.
For this reason, the glass is coated by some means to prevent this heat transfer. For example, white or green pigments may be sprayed on the greenhouse, especially on its ceiling, to reduce the transmission of light and corresponding heat generation. The application of pigment is difficult and must be repeated at regular intervals, leaving an aesthetically unpleasant appearance. More importantly, the pigment permanently reduces the transmission of heat and light, although transmission of light and radiant heat may sometimes be preferred.

More recently, various attempts have been made to form devices capable of variably transmitting light and radiant heat. For example,
As described in U.S. Pat. No. 3,290,203, a solar radiation reflection-transmission control film can be coated on glass. However, such devices have many deficiencies, as recognized in U.S. Pat. No. 4,260,225. Further, U.S. Pat. No. 4,260,225 discloses the deficiency of a permanent translucent plastic film that replaces the glass in greenhouse coverings.

Energy saving device is US Patent No. 4,260,225,
No. 4,085,999, No. 4,082,892 and No. 4,307,942. Such devices typically consist of a light transmissive layer (ie, a transparent layer) that encapsulates a portion containing a polymeric material that is transparent to light at one temperature but less transparent at another. It is believed that radiant heat energy transmitted through such devices is greatly reduced at elevated temperatures, and such devices provide energy savings.

Although such systems provide an effective means of blocking unwanted heat from entering the building, the practical applications of such systems are very limited. For example, the exterior of a building is often exposed to harsh climatic conditions, especially low temperatures of the order of -50 ° F. Unfortunately, devices containing the polymeric material are susceptible to freezing, which can lead to cracking or other failure of the device. Moreover, wide variations in temperature, especially above the cloud point of the polymeric material, result in effective sedimentation problems of the polymeric material.

More recently, as disclosed in U.S. Pat.No. 4,260,225, energy-saving radiant isolation devices are water-soluble polymers that show reverse dissolution with increasing temperature, water, and organic liquids that lower the freezing point of the polymer fluid system. including. Unfortunately, such systems have high polymer concentrations and require polymer fluids that exhibit high viscosities. Not only are such high viscosity systems often difficult to handle, they often introduce unwanted air bubbles into the polymer fluid system. Furthermore, the addition of certain amounts of various organic liquids, such as glycols, to such polymeric fluid systems does not necessarily result in the preferred changes in radiant energy transmission over the preferred temperature range. For example, does a polymeric fluid system containing a certain glycol provide low radiant energy transmission over an unreasonably wide temperature range?
Or, the radiant energy transmittance is hardly or not reduced over a wide temperature range. Moreover, fluid-based systems are difficult to handle, leading to manufacturing problems for energy-saving radiant energy isolation devices. Furthermore, fluid-based systems pose problems associated with the destruction of glass sheets, especially when producing large radiant energy isolation devices.

Various transparent-translucent materials are disclosed in US Pat. No. 4,409,383,
No. 4,444,846 and 4,206,980. However, it is preferred to produce the substantially solid state heat radiation suppressor using an effective and efficient method.

Given the deficiencies of the prior art, a blend of substantially solid-state temperature-sensitive polymeric materials that internally block the transmission of solar energy above a certain temperature range, but which transmits said energy below this temperature range, is internally incorporated. It is highly preferred to manufacture a practical device comprising

The object of the present invention is a substantially solid-state thermoplastic heat radiation suppressor that suppresses heat radiation transmission at temperatures higher than a predetermined temperature range, and comprises (a) a compatibilizing amount of a pendant cyclic iminoether group-containing repeating unit. A first thermoplastic polymer containing (b) a second thermoplastic polymer containing a compatibilizing amount of a repeating unit containing a co-reactive group capable of reacting with the cyclic iminoether group to form a bond; The polymer and the second polymer are generally incompatible in the absence of the pendant cyclic iminoether group and the co-reactive group, and the first polymer and the second polymer are at a certain temperature or a certain temperature. A thermoplastic thermal radiation suppressor having essentially the same index of refraction in the temperature range, but having different indices of refraction at other temperatures or at other temperature ranges.

In another aspect, the present invention is a device that suppresses the transmission of solar energy in a predetermined temperature range, but transmits solar energy in different temperature ranges, is useful over a wide temperature range, and has the above thermoplastic thermal radiation suppression. A device consisting of a translucent encapsulation element including a body.

The term "intimate contact" means that the blend of thermoplastics forms a stable dispersion or a substantially non-delaminated material.

By "stable dispersion" is meant that a dispersion having a continuous phase and a discontinuous phase maintains a substantially steady morphology under repeated heating-cooling conditions experienced during actual use.

The thermal radiation suppressor of the present invention provides a person skilled in the art with a method for improving the usefulness of a device that suppresses the transmission of solar energy in a given temperature range and transmits solar energy in different temperature ranges. That is, it can be said that this heat radiation suppressor is an energy-saving insulating device that can be transparent / opaque. That is, the device can be transparent at one temperature or temperature range but opaque at a different temperature or temperature range.

When the radiation suppressor of the present invention is heated to a predetermined temperature by sunlight or some other radiant heat source, the thermoplastics in the blend will have different refractive indices. This difference in refractive index makes the radiation suppressor sufficiently low transparency,
Significantly reduces the transmission of light and radiant heat through the suppressor. When the suppressor cools below a predetermined temperature, the indices of refraction again coincide with each other and the radiation suppressor becomes transparent again for the passage of light and radiant heat. Thus, the isolation device helps maintain a constant level of light and temperature that is naturally provided to structures such as buildings, thereby reducing energy consumption.

The insulating device of the present invention is particularly useful in applications where there is radiant heat storage due to undesired transmitted light from glass, transparent plastic sheets and the like. For example, a greenhouse where some sunshine is preferred on sunny days, but scattered light is preferred over direct sunlight, and essentially all transmission of naturally provided light is preferred on cold or cloudy days,
Agricultural tunnels, skylights, office buildings, factories,
These devices can be used in schools, homes, workplaces, laboratories, and other buildings.

Typical devices and apparatus useful in the present invention are described in US Pat.
4,260,225, 4,085,999, 4,082,892 and 4,3
No. 07,942. That is, a device useful in the present invention comprises, for example, two generally transparent panels or layers separated from each other. These panels or layers are glass or plastic plates or sheets spaced apart from each other by a frame or the like. The panel or layer is a treated material that darkens when exposed to light and / or radiation and that contains a radiation reflective material. The portion between the panels includes the heat radiation suppressor, typically as a sheet or film between the panels.

The suppressor of the present invention is in the form of a blend of materials, particularly a blend of polymeric materials. The term "blend" as used herein refers to a substantially solid mixture of two or more polymers, commonly referred to in the art as a polymer blend or polymer alloy. Terms such as "compatible blend" or "miscible blend" are not necessarily strictly used to mean a blend having a single glass transition temperature, but rather at least intermediate properties of the component polymers, in particular Used to describe blends that have physical properties. Compatible blends are used to make tough, flexible films or sheets of thermoplastic radiation suppressants. In contrast, the term "incompatible blend" or "immiscible blend" as used herein refers to a property that is significantly inferior to the properties of the component polymers, especially that of the thermoplastic polymer material. Means a blend.

The temperature-sensitive substance of the present invention is a substance which exhibits a constant refractive index at a certain temperature or a certain temperature range, but exhibits a different refractive index (s) at different temperatures or temperature ranges.
The radiation suppressor of the present invention comprises at least one type of temperature-sensitive polymer substance and at least one type of second polymer substance having a refractive index-temperature relationship different from that of the first polymer substance. Including.

It is important to the invention that the index of refraction of the blend of polymeric materials of the thermal radiation suppressor is essentially equal at a particular temperature or a particular temperature range. Such suppressors exhibit the required transparency at a certain temperature or temperature range (ie each component exhibits a different refractive index relationship with temperature). Also necessary for the present invention is the fact that the indices of refraction of the polymeric materials of the suppressor differ from each other at different temperatures or temperature ranges. For good transparency, it is preferred that the refractive indices match as closely as possible. In order to effectively suppress radiant heat, it is preferable that the above-mentioned refractive indices differ as much as possible.

One factor to consider in selecting the first polymeric material of the suppressor is the refractive index of the polymer. That is, it is desirable that the polymer has a functionally effective transparency and exhibits a specific refractive index at a specific temperature. The choice of the first polymer depends on the refractive index of the second polymer used. Further, the first polymer is such that a stable dispersion or substantially non-delaminated material results when in intimate contact with the second polymer. Such compatible blends or stable dispersions, or non-delaminated materials include compatible amounts of bonding between the materials that make up the heat radiation suppressor. A compatible amount of linkage results from the reaction of a compatible group of the first thermoplastic (eg, a cyclic iminoether group) with a co-reactive group of the second thermoplastic.

The thermosensitive thermoplastic material comprises a first thermoplastic polymer containing a pendant cyclic iminoether group and a repeating group containing a co-reactive group capable of reacting with the cyclic iminoether group to form a bond between the polymers of the suppressor. It consists of an intimate admixture with at least one second temperature-sensitive thermoplastic with a matching amount of units. Where each polymer does not contain such compatible cyclic iminoether groups and co-reactive groups, respectively,
Such polymers can be said to be incompatible. The amount of cyclic iminoether groups required to compatibilize the temperature sensitive first and second polymers is specific to the particular polymer used, its relative amount present in the blend and the co-reactivity of the second polymer. It depends to some extent on the amount of radical. However, a compatibilizing amount of the cyclic iminoether group is present when the cyclic iminoether group-containing repeat unit is generally a polymerized monomer unit that comprises at least about 0.01% by weight of the first polymer.

The cyclic imino ether group of the first polymer can form a bond with the co-reactive group of the second polymer. The degree of binding and the nature of the composition of intimate contact can also be controlled by varying the proportion of cyclic iminoether groups and co-reactive groups present in the polymer of the blend. In fact, by controlling the amount of such groups in the blend, the blends of the present invention are optionally made to form very lightly crosslinked thermoplastic blends or heavily crosslinked thermoplastics. be able to. However, in this case it is only necessary that the amount of cyclic iminoether groups (and co-reactive groups of the temperature sensitive thermoplastic) in the polymer is sufficient to compatibilize the composition in the blend. is important. Most typically, the first polymer comprises 0.01 to 10% by weight of pendant cyclic iminoether group containing monomer repeat units, more preferably the first polymer comprises 0.1 to 5% by weight of such repeat units. Such cyclic iminoether groups are best represented by the general formula described in US Pat. No. 4,474,923. Such structures are formed, for example, by addition polymerization of other monomers with 2-alkenyl-2-oxazoline monomers, preferably 2-isopropenyl-2-oxazoline. Examples of monomers that can be polymerized to form the thermoplastics of the present invention include styrenes such as styrene, vinyltoluene, t-butylstyrene, α-methylstyrene and the like;
Examples include alkyl esters of α, β-ethylenically unsaturated acids such as butyl acrylate, methyl methacrylate, ethylhexyl acrylate and the like; monomers such as vinylidene chloride, vinyl acetate and the like. The types of monomers and the amount of monomers relative to each other and which monomers polymerize to form the thermoplastic are:
It depends on factors such as the preferred index of refraction of the resulting polymer, the desired transparency. The preferred first polymer is a polymer containing styrene polymerized as one component. One example of a suitable polymer in polymerized form consists of 83% by weight methyl methacrylate, 15% by weight styrene, 2% by weight isopropenyl oxazoline and has a refractive index at 20 ° C. of about 1,510. Other examples of suitable polymers in polymerized form are: 58% by weight methyl methacrylate, 25% by weight n-butyl acrylate, 15% by weight styrene, 2% isopropenyl oxazoline.
It has a refractive index of about 1,507 at 20 ° C. Such polymers are typically prepared by conventional emulsion polymerization methods for polymerizing aqueous latex dispersion products that can be treated to isolate the polymer product. Typical isolation methods include air drying or oven drying, freeze coagulation or chemical coagulation with substances such as calcium chloride. Such polymers are also produced using conventional bulk polymerization.

The first polymer, the second polymer in intimate contact with the thermoplastic of the temperature sensitive composition, can be varied.
It is understood that the composition of the second polymer can be varied to obtain the desired refractive index properties. Furthermore, the compatibility of the polymers is necessary to form a heat radiation suppressor with the desired physical properties. For this reason, in the most preferred case, the second polymer typically comprises a compatibilizing amount of compatibilizing groups polymerized in the second polymer.

 The second polymer has the necessary temperature sensitivity and
May include compatibilizable or co-reactive groups
Can be modified to contain co-reactive groups.
It is preferably a plastic polymer. Typical second poly
Mer is an olefin such as ethylene and / or propylene
Like vinyl, vinyl halide, vinylidene halide, etc.
Contains polymerized monomers. The second polymer is useful in this case
To be present, the second polymer generally contains the co-reactive group.
Included or modified to give to the co-reactive group after polymerization
Copolymers of addition-polymerizable monomers capable of
It is. For example, all of the above addition polymers are addition polymerized.
Possible carboxylic acids (eg acrylic acid or methacrylic acid)
Acid) to give the polymer a carboxyl group
be able to. Similarly, co-reaction of amino group, amide group, etc.
Of a polymerizable group-containing addition-polymerizable monomer
By copolymerizing the monomer mixture to
Such groups can be provided on the second polymer. Other than this
Suitable second polymers include, in the polymer chain or at the ends
As a group, amine, carboxylic acid, hydroxyl, epoxide
There are polymers containing groups such as cis, mercaptan, hydrate, etc.
You. Examples of particularly preferred copolymers include, for example, ethylene and
Olefins and ethylene, such as acrylic acid copolymers
It is a copolymer with an unsaturated carboxylic acid. Other especially
Useful copolymers include polymerized olefins and ethylene-based
Polymer magnesium consisting of saturated carboxylic acid or
Is a zinc ionomer. For example, ethylene / acrylic
It is possible to use magnesium ionomer of acid copolymer
it can. Other examples of useful polymers are E.I.
E.I.dupont de Nemours & C
O., Inc.) to Surlyn ) Marketed as
It is a zinc ionomer of ethylene / methacrylic acid.
Such polymers are at about 1,508 at 39 ° C and 39 ° C.
And has a refractive index of about 1,502. Grafted segment
Or at least one of the blocks contains a reactive group.
The present invention is also a soft copolymer or block copolymer.
Can be used.

Second consisting of certain monomers such as vinyl halides or vinylidene halides or acrylonitrile
The polymer can be modified to provide co-reactive groups after its polymerization. For example, vinylidene chloride can be reacted with ammonia or a primary amine to add pendant amine groups to the polymer. Similarly, acrylonitrile can be hydrogenated after its polymerization to form pendant amine groups. Other polymers, which usually contain co-reactive groups, can also be used in this case. For example, polymers having repeating amine linkages such as poly (ethyleneimine) or partially hydrolyzed poly (2-alkyl-2-oxazoline) are suitable as other polymers in this case.

An example of a particularly useful temperature sensitive polymer is a polymer consisting of 91 wt% ethylene in polymerized form and 9 wt% acrylic acid. Such polymers have about 1,509 at 20 ° C and about 50 at 50 ° C.
It has a refractive index of 1,495. Another example of a useful polymer is a polymer consisting of 80% by weight ethylene in polymerized form and 20% by weight acrylic acid. Such a polymer has a temperature of about 1,
It has a refractive index of about 1,490 at 506 and 50 ° C.

The polymer blends of this invention can be made by conventional melt blending or solution blending methods.
Melt blending is advantageously carried out by heating each polymer to approximately its softening point and thoroughly mixing the softened polymers. Solution blending is carried out by dissolving each component polymer in a common solvent and precipitating the dissolved polymer from solution. Melt blending is the preferred method of making the blends of the present invention.

Polymer compatibilization is typically accomplished by applying a moderate amount of heat to the blend. The amount of heat required typically depends on the particular co-reactive groups used. Generally, carboxylic acid groups are more reactive than amide, amine or hydroxyl groups, and thus require lower temperatures to form such bonds. When using a high temperature blending method to form the blend, the temperature at which the melt blending is conducted is generally sufficient to form the bond. Generally, and especially when the co-reactive groups are carboxylic acids, such bonds are formed within 1 minute at the temperatures used to melt blend the polymers. It is desirable to incorporate into the blend a catalyst that enhances the reaction rate between the imino ether groups and the co-reactive groups. Lewis acids such as zinc chloride or iron chloride are suitable as such catalysts. Further, it is desirable to include a plasticizer or lubricant to facilitate the contact of the imino ether groups and the co-reactive groups with each other during the blending process. However, it is optional here whether the catalyst, the plasticizer or the lubricant is mixed. It may also be desirable to incorporate additives such as UV radiation absorbers and heat stabilizers into the composition.

The amount of each component that forms the polymer blend of the present invention can vary. The blend is typically the first polymer 10
˜90% by weight and 10-90% by weight of the second polymer. Preferably the blend comprises about 50% by weight of the first polymer and about 50% by weight of the second polymer.

The blends of this invention can be compression molded, injection molded or extruded to the desired shape. The blend is typically formed into a film or sheet. The thickness of film or sheet is typically 0.5mil ~ 20mil, preferably 5mi
It is l ~ 10mil thick.

The device of the present invention is effective over a wide temperature range. In particular, the temperature range useful with this device is in the range of -50 ° F to 200 ° F, preferably -50 ° F to 150 ° F. The device is useful in this temperature range and does not exhibit undesired destruction due to substantial thermal expansion and / or substantial component decomposition.

The following examples further illustrate the invention and are not intended to limit the scope of the invention. All parts and percentages are by weight unless otherwise noted.

Example 1 A methylmethacrylate / styrene / isopropenyloxazoline polymer is prepared as follows: 1 with nitrogen purge, stirrer, addition funnel, inlet and cooler
Deionized water 360 g, diethylenetriaminepentaacetic acid pentasodium salt 1% active aqueous solution 3 g, average particle size in the reactor
Charge 45 g of 260 Å polystyrene seed crystal and 0.1 g of 28% active ammonium hydroxide aqueous solution. The mixture is sparged with nitrogen and the mixture is stirred and heated until the temperature is 90 ° C.
When the temperature reaches 90 ° C., the two feeds are continuously added to the reaction mixture, the addition of these feeds starting simultaneously. The first feed material is methyl methacrylate 249g,
It consists of 45 g of styrene, 6 g of anhydrous isopropenyl oxazoline and 1.5 g of isooctyl thioglycolate and is fed over 120 minutes. The second feedstock was 90 g of deionized water, alkyl-substituted diphenyl oxide = alkali metal sulfonate [The Dow Chemical C
marketed as Dowfx 2A1 by Ompany) 3.3 g of 45% active aqueous solution, sodium persulfate 1.5
28 g of sodium hydroxide 0.3 g and ammonium hydroxide
% Active aqueous solution 0.75 g, fed over 130 minutes.
The reaction mixture is stirred and maintained at 90 ° C. during the simultaneous addition of both feeds. After the feed addition is complete, stir the reaction mixture for an additional 90 minutes and maintain at 90 ° C. The mixture is then cooled to room temperature and passed through a -200 mesh (74 micron) screen. Pour the mixture onto a tray and allow to air dry. The dried material is heated in an oven at 65 ° C for about 1 hour. The dried material is ground to a powder.

Methyl methacrylate / styrene / isopropenyl oxoline A polymer blend is prepared by mixing 22.5 g of polymer with 22.5 g of a polymer consisting of 91% polymerized ethylene and 9% acrylic acid. Ethylene / acrylic acid polymer from Dow Chemical Company
It is marketed as EAA469. Further processing with Brabender Roller 5 / RB.
The polymer is processed at 195 ° C., 50 rpm mixing speed for 3 minutes. The resulting polymer blend pieces are compression molded into a film using a Carver Laboratory Press Model B at a temperature of 180 ° C. 5 mil (0.125 mm) thick 10c sprayed with release agent
Insert polymer pieces between DuPont Mylar Polyester sheets that are m x 10 cm templates. The sample is then inserted between two chrome steel plates and placed in a heated cover press. Increase the pressure in the press to 20,000 pounds (9000 kg) for 3 minutes. Relieve pressure and quench the sample in cold water. A film consisting of ethylene acrylic acid polymer dispersed in methyl methacrylate / styrene / isopropenyl oxazoline polymer is referred to as Sample No. 1.

Visible light (n
m) is measured using a Perkin Elmer Model 33 UV-Vis-NIR spectrophotometer. The data are shown in Table 1.

Table 1 Temperature (° C) Transmittance% 23 85 30 64 40 50 50 38 60 27 70 18 The data in Table 1 show that the transmittance decreases as the temperature of the sample increases. At room temperature (23 ° C),
The% visible light transmission is an acceptable height for using the sample in glazing applications.

Example 2 Polymerized form of methylmethacrylate by the method described in Example 1
A dry powder of a polymer consisting of 186 g, 36 g of styrene, 75 g of butyl acrylate and 3 g of isopropenyl oxazoline is prepared and isolated. This polymer and polymerized ethylene
A film consisting of 80% acrylic acid and 20% acrylic acid, commercially available from Dow Chemical Company as Primacor 5980, is prepared as described in Example 1 with an ethylene-acrylic acid polymer in the dispersed phase. This sample is called sample No.2. Visible light (769 nm) transmission (%) data through the sample at various temperatures is measured as described in Example 1. The data are shown in Table 2.

Table 2 Temperature (℃) Transmittance (%) 20 84 30 79 40 74 50 68 60 60 70 49 80 26 The data in Table 2 shows that as the temperature of the sample increases,
It shows that the transmittance (%) decreases. Percent transmission of visible light at room temperature (20 ° C) is an acceptable height for using the sample in windowpane applications.

Example 3 By the method described in Example 1, 45 g of polymerized styrene, 252 g of methyl methacrylate and 3 g of isopropenyl oxazoline.
A dry powder of a polymer consisting of is prepared and isolated. A film of this polymer and an ethylene-acrylic acid polymer consisting of 91% of polymerized ethylene and 9% of acrylic acid is prepared by the method described in Example 1. The data regarding the% transmission of visible light (600 nm) through the sample at various temperatures is measured as described in Example 1. The data are shown in Table 3.

Table 3 Temperature (° C) Transmittance (%) 23 83 30 75 40 60 50 42 60 27 70 15 The data in Table 3 show that the transmittance (%) decreases with increasing sample temperature. At room temperature (23 ° C.), the% transmission of visible light is acceptable for using the sample in glazing applications.

Example 4 A film-shaped sample is produced for comparison.
This sample consisted of a blend of polymer powder prepared from 45 g of styrene and 255 g of methyl methacrylate monomer using the polymerization and isolation method described in Example 1 and the styrene-acrylic acid polymer described in Example 1. This comparative sample is named Sample No. C-1. The generated film
Cut a 0.5 inch wide strip and
tron) Sample N by testing in tensile tester
o.1 and C-1 physical properties are measured. The results are shown in Table 4.

Table 4 Sample No. Elongation rate% Tensile strength (psi) 1 100 2700 C-1 ^* NMNM * Not a sample of the present invention. NM indicates that the properties of the film are extremely poor and cannot be measured.

The data in Table 4 show that the samples of the invention have acceptable height film properties. The comparative sample does not have favorable film properties.

Example 5 Methyl methacrylate / styrene / isopropenyl-oxazoline polymer of Example 2, ethylene acrylic acid polymer of Example 2 and blends of these polymers (Example 2
Each of the above) is formed into a film by the method described in Example 2. The Bausch and Lomb refractometer equipped with a water bath and a temperature control heater was used to measure the refractive index of the samples Measure at various temperatures according to. The data are shown in Table 5.

Table 5 Sample No. Refractive index Temperature (° C) C-2 ^* 1.5036 23 1.5010 40 1.4995 50 C-3 ^* 1.5024 23 1.4952 40 1.4895 50 2 1.5030 23 1.4990 40 1.4950 50 * Not an example of the present invention.

The data in Table 5 are for thermoplastics (Sample No. C-
2) has a refractive index relationship that correlates to temperature, indicating that the other composition (Sample No. C-3) has a different refractive index with respect to temperature. Data is sample No.C-2 and No.C-3
It is shown that the refractive indices of the two are almost the same at 23 ℃, but differ from each other at 50 ℃. The data also shows sample No. 2 (23
It has also been shown that it exhibits good light transmission at 0 ° C. and low light transmission at 50 ° C.), which has a refractive index intermediate between those of the component compositions.

 The embodiments of the present invention are as follows.

1. (a) a first thermoplastic polymer containing a compatibilizing amount of a repeating unit containing a pendant cyclic iminoether group, and (b) co-reactivity capable of reacting with the cyclic iminoether group to form a bond. A second thermoplastic polymer having a compatibilizing amount of repeating units containing groups, wherein the first polymer and the second polymer are generally incompatible in the absence of the pendant cyclic iminoether group and the co-reactive group. Which is a substantially solid-state thermoplastic thermal radiation suppressor for suppressing thermal radiation transmission at a temperature higher than a predetermined temperature range, wherein the first polymer and the second polymer have a certain temperature or A thermoplastic thermal radiation suppressor that exhibits essentially the same index of refraction over a range of temperatures, but that has different indices of refraction at other or other temperature ranges.

2. The suppressor according to 1 above, which can be used within a temperature range of -50 ° F to 200 ° F (-45.6 ° C to 93.3 ° C) and has a film or sheet shape.

3. The first polymer contains pendant cyclic iminoether groups in a proportion of 0.01% to 10% by weight, and the second polymer contains the co-reactive groups in a proportion of 0.01% to 10% by weight. 3. The suppressor according to 1 or 2 above.

4. The suppressor according to the above 3, wherein the co-reactive group is an electrophilic group containing active hydrogen.

5. The suppressor according to 4 above, wherein the electrophilic group containing active hydrogen is a carboxylic acid group, an amino group or a hydroxyl group.

6. The inhibitor according to the above-mentioned first item, wherein the cyclic iminoether group is a 2-oxazoline group.

7. The suppressor according to 1 above, wherein the first polymer is a polymer containing styrene polymerized, and the second polymer contains a polymerized olefin as a polymer component.

8. The suppressor according to the above 7, wherein the second polymer contains ethylene and / or propylene polymerized as a polymer component.

9. The suppression according to the above 1, wherein the first polymer is a copolymer containing polymerized styrene and 2-alkenyl-2-oxazoline, and the second polymer contains polymerized ethylene and α, β-ethylenically unsaturated carboxylic acid. body.

10. The suppressor according to 1 above, wherein the first polymer is a copolymer containing polymerized styrene, methyl methacrylate and 2-isopropenyl-2-oxazoline, and the second polymer is a copolymer of ethylene and acrylic acid.

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Claims (5)

(57) [Claims] 1. A first thermoplastic polymer containing (a) a compatibilizing amount of a repeating unit containing a pendant cyclic iminoether group, and (b) capable of reacting with the cyclic iminoether group to form a bond. A second thermoplastic polymer having a compatibilizing amount of repeating units containing a co-reactive group, wherein the first polymer and the second polymer are typically in the absence of the pendant cyclic iminoether group and the co-reactive group. It is an incompatible thermoplastic thermal radiation suppressor in a substantially solid state for suppressing thermal radiation transmission at a temperature higher than a predetermined temperature range, and the first polymer and the second polymer are constant. A thermoplastic thermal radiation suppressor that exhibits essentially the same index of refraction at or at certain temperature ranges, but at different temperatures or at other temperature ranges. 2. The suppressor according to claim 1, which can be used within a temperature range of -50 ° F. to 200 ° F. (-45.6 ° C. to 93.3 ° C.) and has a film or sheet shape. 3. The suppressor according to claim 1, wherein the first polymer is a polymer containing polymerized styrene, and the second polymer contains a polymerized olefin as a polymer component. 4. Styrene and 2 polymerized by the first polymer
The inhibitor according to claim 1, which is a copolymer containing -alkenyl-2-oxazoline, wherein the second polymer contains polymerized ethylene and α, β-ethylenically unsaturated carboxylic acid. 5. The inhibition of claim 1 wherein said first polymer is a copolymer containing polymerized styrene, methyl methacrylate and 2-isopropenyl-2-oxazoline and said second polymer is a copolymer of ethylene and acrylic acid. body.