JP2003013026A - Flame-retardant pressure-sensitive adhesive tape - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flame-retardant pressure-sensitive adhesive tape incinerable through the tape is flame retardant without emitting toxic gases during incineration and generating a very small amount of ash. SOLUTION: This flame-retardant pressure-sensitive adhesive tape is obtained by laminating a thermoplastic resin film onto one or both surfaces of a sheet prepared by compounding a flame retardant formed of a composition containing a very small amount of ash and forming a pressure-sensitive adhesive layer on at least one surface of the resultant flame-retardant sheet. The composition containing a very small amount of ash is obtained by compounding 100 pts.wt. of solid content of a urethane resin liquid having 10-70 wt.% resin solid content with 10-150 pts.wt. of hydrazodicarbonamide.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flame-retardant pressure-sensitive adhesive tape used at a radioactive material handling place. Specifically, it does not generate halogen-based gas, phosphorus-based gas, SO ₂ gas, etc. during combustion, does not contain silicone that causes clogging of filters through which combustion gas passes, does not generate phosphorus-based gas, and does not contain ash. The present invention relates to a flame-retardant pressure-sensitive adhesive tape for fixing a flame-retardant sheet used for covering the floor surface, equipments, material storage area, wall surface, etc. of a radioactive material handling site with a small amount.

[0002]

2. Description of the Related Art Conventionally, as a method of making a flammable synthetic resin such as an olefin resin flame-retardant, a method in which a halogen compound such as bromine and antimony trioxide are used in combination is well known. Further, a flame-retardant composition obtained by blending an organopolysiloxane and an organometallic compound without blending a chlorine-based additive with a flammable non-chlorine polymer so that a toxic gas is not generated during incineration. Is also known. These known compositions have a problem that halogen gas such as chlorine gas and bromine gas, NO ₂ gas and SO ₂ gas are generated during incineration, and a large amount of ash is generated. In addition, Japanese Patent Laid-Open No. 3-7
767, JP-A-3-15539, JP-A-4
No. 3,332,640 and JP-A No. 7-164594 describe compositions and films using urea as a flame retardant, but urea has a strong polarity and poor compatibility with a thermoplastic polymer. Further, urea has a high solubility in water and a high hygroscopicity, and thus it is difficult to handle because it is aggregated. Further 132
Since it melts at ℃ and decomposes, it has the drawback of poor workability.

[0003]

In particular, in areas where radioactive materials are handled, such as nuclear power plants and radioactive material research laboratories, thermoplastic synthesis is performed to prevent radioactive materials from adhering to floors, walls, ceilings, partitioning equipment and the like. It is covered with a resin film. A flame-retardant pressure-sensitive adhesive tape is used to attach the film to a device or the like, or to attach the films to each other. And after a certain period of time, exchange for a new film,
The removed old film is incinerated. However, as the residual ash remains radioactive after incineration, increasing the amount of ash increases the material costs and storage space required to seal the radioactive ash, so it is strongly required that the residual ash content after incineration be low. To be done. At the same time, the strength is required so that the floor or the like will not be exposed due to damage during use. In recent years,
As a flame retardant, not only halogen-containing substances but also phosphorus-containing substances were used because they clog the filter when incinerated. The present invention eliminates the above-mentioned conventional problems, can be incinerated while being flame-retardant, does not generate a harmful gas during incineration, generates less ash, and has a good flame-retardant adhesive tape. The purpose is to provide.

[0004]

Means for Solving the Problems The present invention provides "1. Addition of 10 to 150 parts by weight of hydrazodicarbonamide to 100 parts by weight of solid content of a urethane resin liquid having a resin solid content of 10 to 70% by weight. 1. A flame-retardant pressure-sensitive adhesive tape having a pressure-sensitive adhesive layer formed on at least one surface of a flame-retardant sheet having a thermoplastic resin film laminated on one or both sides of a sheet containing a flame-retardant agent formed of the trace ash composition. Sheet containing flame retardant is resin solid content 10-70
Solid content 90% to 40% by weight of urethane resin organic solvent solution
10% to 60% by weight of the acrylic resin organic solvent solution having a resin solid content of 10 to 60% by weight, and 10 to 60% by weight of the polyolefin resin organic solvent solution having a resin solid content of 25 to 75% by weight. Formed by a trace ash composition comprising 1 or 2 resins selected from the group consisting of 60% by weight, and 10 to 150 parts by weight of hydrazodicarbonamide to 100 parts by weight of total resin solids. A flame-retardant pressure-sensitive adhesive tape according to item 1, which is a sheet. 3. Sheet containing flame retardant is resin solid content 10-70
Solid content of wt% urethane resin aqueous dispersion 9
0 to 40% by weight, resin solids content 20 to 60% by weight, acrylic-urethane copolymer aqueous dispersion solids content 10 to 60% by weight, and resin solids content 25 to 75% by weight
1 or 2 resin selected from the group consisting of 10 to 60% by weight of the solid content of the polyolefin-based resin aqueous dispersion is blended, and 10 to 100 parts by weight of the total resin solid content is added.
The flame-retardant pressure-sensitive adhesive tape according to item 1, which is a sheet formed of a trace ash composition containing 150 parts by weight of hydrazodicarbonamide. 4. The flame-retardant pressure-sensitive adhesive tape according to any one of items 1 to 3, wherein the pressure-sensitive adhesive layer is made of a pressure-sensitive adhesive obtained by crosslinking an acrylic acid ester copolymer with a curing agent. 5. The flame-retardant pressure-sensitive adhesive tape according to item 4, wherein the curing agent is 0.5 to 7 parts by weight with respect to 100 parts by weight of the acrylic acid ester copolymer. 6. The pressure-sensitive adhesive of the pressure-sensitive adhesive layer comprises a rubber-based pressure-sensitive adhesive, 1
Item 5. A flame-retardant pressure-sensitive adhesive tape according to any one of items 5 to 5. 7. The average particle size of hydrazodicarbonamide is 80 μm
The flame-retardant adhesive tape according to any one of items 1 to 6 below. 8. The flame-retardant pressure-sensitive adhesive tape according to any one of items 1 to 7, which has an oxygen index of 26 or more. 9. Amount of adhesive is 10-100g for flame retardant sheet
/ M ^{2 The} flame-retardant pressure-sensitive adhesive tape according to any one of items 1 to 8. Regarding

[0005]

The urethane resin liquid used in the present invention may be either an organic solvent solution or an aqueous dispersion. A urethane resin having a main structure of polyester, polyether, or polycarbonate is used as the main structure,
A urethane resin having a polyester main structure is preferable in terms of flexibility, water resistance, adhesion, weather resistance, price, and the like.

The organic solvent solution resin of the urethane resin used in the present invention has a solid content of 10 to 70% by weight and a viscosity of 10%.
0 to 5000 cp is preferable, and for example, Desmocol 130, Desmocoll 406 manufactured by Sumitomo Bayer Urethane Co., Ltd., ADEKA BONTITER U-500M21, ADEKA BONTITER U- manufactured by Asahi Denka Co., Ltd.
500M22, CRI manufactured by Dainippon Ink and Chemicals Co., Ltd.
SVON 2016EL, CRISVON 2116E
L, CRISVON 75ST, manufactured by Kansai Paint Co., Ltd., RETAN F-8997, RETAN F-8998, RETAN 2900D, RETAN 2900G and the like.

The urethane aqueous dispersion used in the present invention has a solid content of 10 to 70% by weight and a particle size of 0.0.
1-10 μm, viscosity 100-3000 cp, pH 4-9
Preferred are those such as Despercoll U-53 and Despercoll U manufactured by Sumitomo Bayer Urethane Co., Ltd.
-54, Despercoll KA 8481, Asahi Denka Kogyo Co., Ltd. Adekabon titer HUX-380, Adekabon titer HUX-232, Adekabon titer HUX-350, Adekabon titer HUX-3
80H, Kansai Paint Co., Ltd., Retan WB-
C, RETAN WB-C8G and the like. In the case of extrusion processing and calendar processing, it is possible to use urethane resins for pellets and powers.

The acrylic resin organic solvent solution used in the present invention has a solid content of 15 to 70% by weight and a viscosity of 100 to 5000.
cp is preferable, and CRISCOAT AC-60 and CRISCOAT manufactured by Dainippon Ink and Chemicals, Inc.
AC-100, RISCOAT AC-1330, etc. are mentioned. The acrylic-urethane copolymer aqueous dispersion used in the present invention has a solid content of 20 to 60.
Those having a weight% and a viscosity of 20 to 500 cp are preferable, for example, Kansai Paint Industry Co., Ltd., Retan ACU-4, Retan ACU-9, Retan ACU-K, VOCOAT CG-5010, VOCO manufactured by Dainippon Ink and Chemicals Co., Ltd.
AT CG-5050, VOCOAT CG-505
6, etc. are mentioned.

The organic solvent solution resin of the polyolefin resin used in the present invention has a solid content of 10 to 75% by weight and a viscosity of 400 to 3000 cp.
Those having 0 to 70% by weight and a viscosity of 400 to 1000 cp are preferable, and examples thereof include Vinylol 30 and Vinylol 9500 manufactured by Showa Polymer Co., Ltd. As the aqueous dispersion of the polyolefin resin used in the present invention, those having a solid content of 10 to 75% by weight and a viscosity of 100 to 7000 cp are used, but a solid content of 30 to 70% by weight and a viscosity of 100 to
It is preferably 3000 cp, and the resin is preferably an ethylene-vinyl acetate copolymer aqueous dispersion. For example, Sumiflex S- manufactured by Sumitomo Chemical Co., Ltd.
456, Sumiflex S-752 and the like are preferably used. The present invention uses hydrazodicarbonamide as a flame retardant. The chemical formula of hydrazodicarbonamide is

[0010]

[Chemical 1] The compound has a melting point of 256 ° C. and a specific gravity of 1.5.

Considering the dispersion of hydrazodicarbonamide in a resin organic solvent solution and a resin aqueous dispersion,
The particle size is preferably 80 μm or less. Particle size is 5
It is more preferably 50 μm, and particularly preferably 5 to 20 μm. The hydrazodicarbonamide is added in an amount of 10 to 150 parts by weight based on 100 parts by weight of the resin solid content. Preferably 20 to 120 parts by weight, more preferably 40 to 100 parts by weight is added. If the addition amount is 10 parts by weight or less, the flame retardant effect is small, and if it is 150 parts by weight or more, the improvement of the flame retardant effect is small. Moreover, the viscosity of the organic solvent solution of the flame-retardant resin increases, which makes it difficult to produce the flame-retardant resin solution. Further, the adhesion between the flame-retardant resin layer and the pressure-sensitive adhesive becomes poor. Examples of hydrazodicarbonamide include KBH-30 (manufactured by Otsuka Chemical Co., Ltd.).

In the present invention, the urethane resin organic solvent solution or the acrylic resin organic solvent solution, the liquid composition obtained by adding hydrazodicarbonamide to the resin solution containing the polyolefin resin, or the urethane resin aqueous solution is used in the present invention. A liquid composition prepared by adding hydrazodicarbonamide to an aqueous dispersion prepared by mixing an acrylic-urethane copolymer aqueous dispersion and a polyolefin diameter resin aqueous dispersion into a dispersion is cast on a thermoplastic resin film and laminated. Mold flame-retardant sheet. As the thermoplastic resin, polyester resin, polypropylene resin, polyethylene resin, ethylene-vinyl acetate copolymer and the like are used. Lamination can be performed by, for example, a knife coater or the like.

As the pressure-sensitive adhesive for forming the pressure-sensitive adhesive layer, acrylic-based or rubber-based pressure-sensitive adhesives can be used, and these pressure-sensitive adhesives include any of solvent type, water dispersion type and hot melt type. May be Acrylic pressure-sensitive adhesives usually have a non-crosslinking type and a crosslinking type, but a crosslinking type crosslinked with a curing agent is preferable. Acrylic pressure sensitive adhesives are mainly composed of acrylic acid esters, and are alkyl acrylates or methacrylates having 4 to 12 carbons which form a polymer having a low Tg as a main monomer.
Monomers such as ethylhexyl, butyl acrylate, isooctyl acrylate, etc. and short side chain acrylic ester,
Tg of methacrylic acid ester, vinyl acetate, styrene, etc.
A copolymer with a monomer having a high molecular weight and a functional group is used. The functional groups affect the wetting properties and provide a field for crosslinking. As an adhesive agent of an acrylic acid ester copolymer, manufactured by Toyo Ink Mfg. Co., Ltd., Olivene BPS 578
9, Olivine BPS 3841, Olivine BP
S 3180-3A, Olivine BPS 1109,
NISSETSU K manufactured by Nippon Carbide Industry Co., Ltd.
P-1429, NISSETSU KP-1905, N
ISSETU KP-1909 is mentioned. As the cross-linking agent, an isocyanate-based one is preferable, manufactured by Toyo Ink Mfg. Co., Ltd., Olivine BXX 5627,
Olivine BXX 5134, Nippon Carbide Industry Co., Ltd., NISSETSU CK-101, NISS
ETSUCK-102 is mentioned.

As the rubber-based adhesive, a natural rubber adhesive,
Examples thereof include styrene-butadiene random copolymer (SBR) adhesive, polyisobutylene adhesive (PIB), butyl rubber adhesive, and the like, and SBR adhesive is preferable. As SBR adhesives, manufactured by Toyo Ink Mfg. Co., Ltd., Olivine BPS 3757-1, Olivine
BPS 4595 etc. are mentioned. The flame-retardant pressure-sensitive adhesive tape can be manufactured by forming a pressure-sensitive adhesive layer on at least one surface of the flame-retardant sheet. In both cases of the solvent type and the water dispersion type, the pressure-sensitive adhesive is applied on the release sheet and dried to form the pressure-sensitive adhesive layer, and then the pressure-sensitive adhesive layer is transferred and laminated on the flame-retardant sheet. When not using transfer, a solvent-type or water-dispersion type adhesive is directly applied to the flame-retardant sheet. The amount of the adhesive applied is 10 to 100 g / m ² , preferably 10 to 80 g / m ² , and more preferably 20.
Is about 70 g / m ² . When the coating amount is 10 g / m ² or less, the adhesive force is small, and when it is 100 g / m ² or more, the flame retardancy is deteriorated.

The curing agent for crosslinking the acrylic pressure-sensitive adhesive layer is preferably an isocyanate curing agent, and the amount of the curing agent added is 0.5 to 7 parts by weight, preferably 1.0 to 5 parts by weight, based on the pressure-sensitive adhesive. It is a department. When the amount is 0.5 parts by weight or less, the holding power is large and the adhesive remains when peeled off to an adhesive. When the amount is 7 parts by weight or more, the holding power becomes small and the adhesive tape does not function. In order to improve the hand-cutting property of manually cutting the flame-retardant pressure-sensitive adhesive tape, it is possible to provide small slits before or after the pressure-sensitive adhesive is applied to the flame-retardant pressure-sensitive adhesive tape. The small holes can be formed using a heating needle. Further, it is preferable to use a uniaxially stretched thermoplastic sheet having good hand-cutting property as the base sheet of the flame-retardant adhesive tape.

[0016]

EXAMPLES The present invention will be specifically described with reference to examples. Example 1 (1) 333 parts by weight of urethane resin organic solvent solution Retan F-2900G (manufactured by Kansai Paint Co., Ltd .: solid content 30% by weight) into a base material sheet agitator (capacity 50 liters) and flame retardant hydrazodicarbonate Amide KBH-30 (manufactured by Otsuka Chemical Co., Ltd., average particle size 5 to 8 μm, melting point 256 ° C., specific gravity 1.
5) 80 parts by weight and solvent methyl ethyl ketone (MEK)
Add 70 parts by weight, stir and knead for 30 minutes to obtain a viscosity of 2
730cp (BM type viscometer, rotor V-6, 30rp
m, 25 ° C.) to obtain a flame-retardant resin organic solvent solution. The flame-retardant resin organic solvent solution was applied to one side of a polyester film having a thickness of 25 μm and corona discharge machined on both sides by using a knife coater, and was gradually heated in a heating furnace at 90 ° C., 120 ° C. and 140 ° C. A flame-retardant sheet having a thickness of 120 μm was formed by laminating a flame-retardant resin on one surface of a polyester film by heat processing. No flame-retardant resin was laminated on the other surface. On the surface of the flame-retardant sheet on which the flame-retardant resin is not laminated, the needle diameter is 0.8 mm, and the distance between the needles is 1.0.
mm and 1.0 mm wide, the roll was set under heat and pressure to form small holes for cutting in the flame-retardant sheet. The surface of the flame-retardant sheet provided with the small holes, on which the flame-retardant resin is not laminated, is coated with a gravure roll to form a back release agent Piroyl 1050 (manufactured by Yodosha Yushi Kogyo Co., Ltd.) 0.1 g /
m ^{2 was} applied and peeled off. The flame-retardant sheet provided with the small holes and subjected to the release treatment was used as a base material for producing the flame-retardant adhesive tape. (2) Olivine BP as an adhesive acrylic ester copolymer
100 parts by weight of S 5789 (manufactured by Toyo Ink Mfg. Co., Ltd.) was used, and Olivine BXX 5 was used as a crosslinking agent.
An adhesive prepared by mixing 2 parts by weight of 627 (manufactured by Toyo Ink Mfg. Co., Ltd.) was coated on release paper and dried at 90 ° C. for 5 minutes. The amount of the adhesive applied was 40 g / m ² . (3) The pressure-sensitive adhesive layer coated on the release paper manufactured in (2) is transferred to the surface of the flame-retardant sheet base material manufactured by the flame-retardant adhesive tape (1) on which the flame-retardant resin is laminated, The release paper was removed to obtain a flame-retardant adhesive tape. After aging the flame-retardant adhesive tape at 40 ° C. for 7 days,
It was slit to a width of 5 cm. The results of measuring the performance of the flame-retardant adhesive tape are shown in Table 2.

Example 2 A flame-retardant sheet produced in the same manner as in Example 1 was used as a base material for a flame-retardant adhesive tape. The same pressure-sensitive adhesive as in Example 1 was used, and the pressure-sensitive adhesive was directly coated on the surface of the flame-retardant sheet base material on which the flame-retardant resin was laminated, and dried at 90 ° C. for 5 minutes to give a flame-retardant adhesive tape. Got The coating amount of the pressure-sensitive adhesive layer was 40 g / m ² . The flame-retardant adhesive tape was aged at 40 ° C. for 7 days, and then slit into a width of 5 cm. The results of measuring the performance of the flame-retardant adhesive tape are shown in Table 2.

Example 3 Flame retardant hydrazodicarbonamide K in Example 1
20 parts by weight of BH-30 were used and 10 parts by weight of the solvent methyl ethyl ketone (MEK) were used. Otherwise in the same manner as in Example 1, a flame-retardant resin organic solvent solution having a viscosity of 2260 cp was obtained. The flame-retardant solvent solution was used, and a polyester film having a thickness of 17 μm and corona discharge machined on both sides was used as the polyester film in Example 1.
Others were processed similarly to Example 1. The flame-retardant solvent solution was applied to a polyester film having a thickness of 17 μm and corona discharge machined on both sides to obtain a flame-retardant sheet having a thickness of 150 μm. The flame-retardant sheet was used as a base material for a flame-retardant adhesive tape. The same thing as Example 1 was used as an adhesive, and Example 1
In the same manner as above, transfer coating was performed on the flame-retardant pressure-sensitive adhesive tape substrate to obtain a flame-retardant pressure-sensitive adhesive tape. The coating amount of the adhesive layer is 2
It was 0 g / m ² . The results of measuring the performance of the flame-retardant adhesive tape are shown in Table 2.

Example 4 Urethane resin organic solvent solution Retan F in Example 1
-Instead of 2900G, CRISVON 2016E
333 parts by weight of L (manufactured by Dainippon Ink and Chemicals, Inc., solid content: 30% by weight) was used, and 120 parts by weight of the flame retardant hydrazodicarbonamide (manufactured by Otsuka Chemical Co., Ltd.) was used. Otherwise in the same manner as in Example 1, a flame-retardant resin organic solvent solution having a viscosity of 3140 cp was obtained in the same manner as in Example 1. Using the flame-retardant resin organic solvent solution, a 70-μm thick flame-retardant sheet was obtained in the same manner as in Example 1. The flame-retardant sheet was used as a base material for a flame-retardant adhesive tape. Example 1 is the adhesive
In 4), the crosslinking agent was 4 parts by weight of Olibain BXX 5627 (manufactured by Toyo Ink Mfg. Co., Ltd.), and an adhesive was produced in the same manner as in Example 1. The pressure-sensitive adhesive was transferred and applied to the flame-retardant pressure-sensitive adhesive tape base material in the same manner as in Example 1 to obtain a flame-retardant pressure-sensitive adhesive tape. The amount of the adhesive layer applied is 70 g / m
It was ² . The results of measuring the performance of the flame-retardant adhesive tape are shown in Table 2.

Example 5 Urethane resin organic solvent solution Retan F in Example 1
Instead of -2900G, 263 parts by weight of a urethane resin aqueous dispersion, Retan WB-C8G (manufactured by Kansai Paint Co., Ltd .: solid content 38% by weight) was used. 40 parts by weight of flame retardant hydrazodicarbonamide KBH-30 was used. The solvent methyl ethyl ketone (MEK) was not used, and 30 parts by weight of water was added. Others are Example 1
A flame-retardant aqueous dispersion having a viscosity of 2550 cp was obtained in the same manner as in. Using the flame-retardant aqueous dispersion liquid, a flame-retardant sheet having a thickness of 120 μm was obtained in the same manner as in Example 1. The flame-retardant sheet was used as a base material for a flame-retardant adhesive tape.
The crosslinking agent used in Example 1 was Olibain BXX 562.
7 (manufactured by Toyo Ink Mfg. Co., Ltd.) was used as 1 part by weight, and an adhesive was produced in the same manner as in Example 1. The adhesive was used in Example 1
In the same manner as above, 40 g / m ^{2 was} coated on the release paper. The pressure-sensitive adhesive layer was transfer-coated on the flame-retardant pressure-sensitive adhesive tape substrate to obtain a flame-retardant pressure-sensitive adhesive tape. The results of measuring the performance of the flame-retardant adhesive tape are shown in Table 2.

Example 6 Instead of the urethane resin organic solvent solution in Example 1, urethane aqueous dispersion resin WB-C was used.
8G (Kansai Paint Co., Ltd .: solid content 38% by weight) 1
84 parts by weight, olefin resin aqueous dispersion
46 parts by weight of Sumiflex S-467 (manufactured by Sumitomo Chemical Co., Ltd., solid content: 65% by weight) was used. Flame retardant 100 parts by weight of hydrazodicarbonamide KBH-30 was used. Do not use the solvent methyl ethyl ketone (MEK),
50 parts by weight of water was used. Otherwise in the same manner as in Example 1, a flame-retardant aqueous dispersion having a viscosity of 2620 cp was obtained. A flame-retardant sheet having a thickness of 180 μm was obtained in the same manner as in Example 1 using the flame-retardant aqueous dispersion. The flame-retardant sheet was used as a base material for a flame-retardant adhesive tape. In Example 1, 100 parts by weight of Olivain BSP 5215 (manufactured by Toyo Ink Mfg. Co., Ltd.) was used as the crosslinking agent instead of Olivain BPS 5789 as the crosslinking agent.
An adhesive was manufactured by stirring and mixing 3 parts by weight of BXX 5627 (manufactured by Toyo Ink Mfg. Co., Ltd.). The adhesive was coated on release paper in the same manner as in Example 1 at 50 g / m ² . The pressure-sensitive adhesive layer was transfer-coated on the flame-retardant pressure-sensitive adhesive tape substrate to obtain a flame-retardant pressure-sensitive adhesive tape. The results of measuring the performance of the flame-retardant adhesive tape are shown in Table 2.

Example 7 Urethane resin organic solvent solution Retan F in Example 1
Instead of -2900G, urethane resin aqueous dispersion, RETAN WB-C8G (solid content 38% by weight) 18
4 parts by weight, acrylic-urethane copolymer aqueous dispersion Retan ACU-K (manufactured by Kansai Paint Co., Ltd.,
Solid content 40% by weight) 75 parts by weight. The solvent methyl ethyl ketone (MEK) was not used and 50 parts by weight of water was added. Others are the same as in Example 1, and the viscosity is 2410 cp.
A flame-retardant water-based dispersion was obtained. Using the flame-retardant aqueous dispersion, a thickness of 20 was obtained in the same manner as in Example 1.
A flame-retardant sheet of 0 μm was obtained. The flame-retardant sheet was used as a base material for a flame-retardant adhesive tape. The same pressure-sensitive adhesive as in Example 1 was used, and it was made compatible with Example 1 and transfer-coated on the flame-retardant pressure-sensitive adhesive tape base material to obtain a flame-retardant pressure-sensitive adhesive tape. The coating amount of the pressure-sensitive adhesive layer was 40 g / m ² . The results of measuring the performance of the flame-retardant adhesive tape are shown in Table 2.

Example 8 233 parts by weight of F-2900G urethane resin as an organic solvent solution of urethane resin in Example 1 and 100% by weight of acrylic resin organic solvent solution CRISCOAT P-1130 (manufactured by Dainippon Ink and Chemicals, Inc .: solid content 30% by weight) Used part. Others are the same as in Example 1, and the viscosity is 287.
A 0 cp flame retardant resin organic solvent solution was obtained. Using the flame-retardant solvent solution, a polyester film having a thickness of 75 μm and a corona discharge machined on one side was used in place of the polyester film having a thickness of 25 μm on both sides, which was corona discharge machined. Processed as in Example 1. Flame retardant resin organic solvent solution with a thickness of 75 μm
To a polyester film, and a flame-retardant sheet having a thickness of 300 μm was obtained. The flame-retardant sheet was used as a base material for a flame-retardant adhesive tape. The same adhesive as in Example 1 was used as an adhesive, and transfer coating was performed on the flame-retardant adhesive tape substrate in the same manner as in Example 1 to obtain a flame-retardant adhesive tape. The coating amount of the adhesive layer is 6
It was 0 g / m ² . The results of measuring the performance of the flame-retardant adhesive tape are shown in Table 2.

Example 9 In Example 1, the same flame-retardant resin solution as in Example 1 was used, and a polyester film having a thickness of 25 μm and corona discharge machined on both sides was used as in Example 1. To obtain a flame-retardant sheet having a thickness of 150 μm. A flame-retardant resin of ethylene-vinyl acetate copolymer (vinyl acetate content 19% by weight) film having a thickness of 25 μm, which is a base material of the flame-retardant pressure-sensitive adhesive tape, was laminated on the flame-retardant sheet. On the surface by dry laminating method,
It was used as a base material for a flame-retardant adhesive tape having a thickness of 175 μm. The same adhesive as that used in Example 1 was coated on release paper in the same manner to form an adhesive layer having an adhesive weight of 40 g / m ² . The pressure-sensitive adhesive layer on the release paper was transferred to both surfaces of the flame-retardant pressure-sensitive adhesive tape substrate by the hot lamination method to form a pressure-sensitive adhesive layer. The pressure-sensitive adhesive layer has a weight of 40 g / m ^2.
Met. The release paper was not removed and was left attached to obtain a flame-retardant adhesive tape having adhesive layers on both sides. The results of measuring the performance of the flame-retardant adhesive tape are shown in Table 2.

Comparative Example 1 Hydrazodicarbonamide KBH-in Example 1
The compounding amount of 30 was 7 parts by weight with respect to 100 parts by weight of the urethane resin solid content. Also, methyl ethyl ketone (MEK)
Was not added. Otherwise in the same manner as in Example 1, a flame-retardant resin organic solvent solution having a viscosity of 1840 cp was obtained. A flame-retardant sheet having a thickness of 120 μm was obtained in the same manner as in Example 1, except that the organic solvent solution of the flame-retardant resin was used. The flame-retardant sheet was used as a base material for a flame-retardant adhesive tape. Example 1 on the substrate
The same pressure-sensitive adhesive as in Example 1 was applied in the same manner as in Example 1 to obtain a flame-retardant pressure-sensitive adhesive tape. Low oxygen index. The results of measuring the performance of the flame-retardant adhesive tape are shown in Table 2.

Comparative Example 2 Hydrazodicarbonamide KBH-in Example 1
The compounding amount of 30 was 7 parts by weight based on 100 parts by weight of the solid content of the urethane resin, the same flame retardant resin organic solvent solution as in Example 1 was used except that methyl ethyl ketone was not used, and the same procedure as in Example 1 was performed. A flame retardant sheet was obtained. The flame-retardant sheet was used as a base material for a flame-retardant adhesive tape. Example 1 In Example 1
The same pressure-sensitive adhesive as in above was applied to the substrate by a transfer method at 6 g / m ² to obtain a flame-retardant pressure-sensitive adhesive tape. Low oxygen index. The results of measuring the performance of the flame-retardant adhesive tape are shown in Table 2.

Comparative Example 3 Hydrazodicarbonamide KBH-in Example 1
A flame-retardant sheet was obtained in the same manner as in Example 1 except that the compounding amount of 30 was 7 parts by weight based on 100 parts by weight of the solid content of the urethane resin, and methyl ethyl ketone was not used. The flame-retardant sheet was used as a base material for a flame-retardant adhesive tape. In Example 1, the same pressure-sensitive adhesive as in Example 1 was applied to the substrate by a transfer method at 120 g / m 2.
^Two coatings were applied to obtain a flame-retardant adhesive tape. Poor flame retardancy and low oxygen index. The results of measuring the performance of the flame-retardant adhesive tape are shown in Table 2.

Comparative Example 4 Hydrazodicarbonamide KBH-in Example 1
The blending amount of 30 was 180 parts by weight with respect to 100 parts by weight of the urethane resin solid content, and 130 parts by weight of methyl ethyl ketone was used. Others were the same as in Example 1 and the viscosity was 3650c.
A flame-retardant resin organic solvent solution of p was obtained. Since the amount of hydrazodicarbonamide was too large, it was difficult to produce a flame-retardant resin solution. A flame-retardant sheet was obtained in the same manner as in Example 1, except that the organic solvent solution of the flame-retardant resin was used. The flame-retardant sheet was used as a base material for a flame-retardant adhesive tape. The adhesive is the same as in Example 1, olivine BPB 5
789 100 parts by weight was used, and a pressure-sensitive adhesive containing no crosslinking agent was used. Otherwise in the same manner as in Example 1, 40 g / m ^{2 was} applied to the base material by the transfer method to obtain a flame-retardant adhesive tape.
The pressure-sensitive adhesive was soft, the adhesive holding power was poor, and the adhesiveness between the flame-retardant resin layer and the pressure-sensitive adhesive was poor, resulting in peeling. The results of measuring the performance of the flame-retardant adhesive tape are shown in Table 2. Example 1
Table 1 shows the composition of the flame-retardant resin liquid of Comparative Example 4.

[0029]

[Table 1]

[0030]

[Table 2]

(Note) 1. The blending amounts of the resin and the cross-linking agent in Examples and Comparative Examples are parts by weight. 2. Olivine BPS 5215, 5789, 5627
Has a weight of g / m2.

Test method (1) Oxygen index JIS K 7201 Support method classification: B-1 (2) Adhesion test In accordance with JIS Z 0237 180 degree peeling method Test load: 9.807N Test time: 60 minutes (3) Holding power test According to JIS Z 0237 Offset length (mm)

[0033]

INDUSTRIAL APPLICABILITY The present invention solves the above-mentioned conventional problems, is incombustible even though it is flame-retardant, does not generate harmful gas during incineration, produces less ash, and has a filter eye during incineration. It has an excellent effect of not causing clogging.

[Procedure amendment]

[Submission date] October 24, 2001 (2001.10.
24)

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0012

[Correction method] Change

[Correction content]

In the present invention, the urethane resin organic solvent solution or the resin obtained by blending this with the acrylic resin organic solvent solution and the polyolefin resin organic solvent solution is used.
Liquid composition plus hydrazodicarbonamide in solvent solution,
Alternatively urethane resin aqueous dispersion acrylic - cast urethane copolymer aqueous dispersion and the polyolefin resin aqueous dispersion Hydra John aqueous dispersion containing a combination of azodicarbonamide and a liquid composition obtained by adding flow onto the thermoplastic resin film , Laminated to form a flame-retardant sheet. As the thermoplastic resin, polyester resin, polypropylene resin, polyethylene resin, ethylene-vinyl acetate copolymer and the like are used. Lamination can be performed by, for example, a knife coater or the like.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] 0029

[Correction method] Change

[Correction content]

[0029]

[Table 1]

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0031

[Correction method] Change

[Correction content]

(Note) 1. The blending amounts of the resin and the cross-linking agent in Examples and Comparative Examples are parts by weight. 2. Olivine BPS5215, BPS5 789, BXX5 627 weigh g
/ M ² .

Continued front page    F term (reference) 4J004 AA10 AB01 AB04 CA02 CA03                       CA04 CA06 CB03 CC02 FA10                 4J040 CA011 DA141 DB021 DB051                       DE001 DF041 DF051 HC16                       KA16

Claims (9)

[Claims] 1. A trace ash composition formed by mixing 10 to 150 parts by weight of hydrazodicarbonamide with 100 parts by weight of a solid content of a urethane resin liquid having a resin solid content of 10 to 70% by weight. A flame-retardant pressure-sensitive adhesive tape having a pressure-sensitive adhesive layer formed on at least one surface of a flame-retardant sheet obtained by laminating a thermoplastic resin film on one or both sides of a sheet containing a combustible agent. 2. The resin solid content of the sheet containing the flame retardant is 1
Solid content of 0-70 wt% urethane resin organic solvent solution 9
Solid content of acrylic resin organic solvent solution having a resin solid content of 10 to 60% by weight and solid content of 10 to 60% by weight, and solid content of a polyolefin resin organic solvent solution having a resin solid content of 25 to 75% by weight with respect to 0 to 40% by weight. 1 or 2 resins selected from the group consisting of 10 to 60% by weight of total resin solid content
The flame-retardant pressure-sensitive adhesive tape according to claim 1, which is a sheet formed of a trace ash content composition in which 10 to 150 parts by weight of hydrazodicarbonamide is mixed with 100 parts by weight. 3. The resin solid content of the sheet containing the flame retardant is 1.
Solid content of 90 to 40% by weight of the urethane resin aqueous dispersion of 0 to 70% by weight, and solid content of the resin of 20 to 60%
Acrylic-urethane copolymer aqueous dispersion having a solid content of 10 to 60% by weight, and a resin solid content of 25 to 7
1 or 2 resin selected from the group consisting of 10 to 60% by weight of solid content of 5% by weight polyolefin-based resin aqueous dispersion is blended, and 10 to 150 parts by weight of hydra is added to 100 parts by weight of total resin solid content. The flame-retardant pressure-sensitive adhesive tape according to claim 1, which is a sheet formed of a trace ash composition containing zodicarbonamide. 4. The flame-retardant pressure-sensitive adhesive tape according to claim 1, wherein the pressure-sensitive adhesive layer comprises a pressure-sensitive adhesive obtained by crosslinking an acrylic acid ester copolymer with a curing agent. 5. Acrylic ester copolymer 1 as a curing agent
The amount is 0.5 to 7 parts by weight with respect to 00 parts by weight.
Flame-retardant adhesive tape described in. 6. The flame-retardant pressure-sensitive adhesive tape according to claim 1, wherein the pressure-sensitive adhesive of the pressure-sensitive adhesive layer comprises a rubber-based pressure-sensitive adhesive. 7. The flame-retardant pressure-sensitive adhesive tape according to claim 1, wherein the hydrazodicarbonamide has an average particle size of 80 μm or less. 8. The flame-retardant pressure-sensitive adhesive tape according to claim 1, which has an oxygen index of 26 or more. 9. The amount of adhesive is 10 to the flame-retardant sheet.
It is 100 g / m < ² >, Any one of Claim 1 thru | or 8 characterized by the above-mentioned.
Flame-retardant pressure-sensitive adhesive tape according to item.