Ultraviolet-cured pressure-sensitive adhesive tape or film without supporting substrate

A pressure-sensitive adhesive, pressure-sensitive adhesive technology, applied in the direction of film/sheet without carrier, film/sheet-shaped adhesive, adhesive type, etc., can solve disadvantages, etc.

Inactive Publication Date: 2008-04-16
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This technique is disadvantageous in terms of the production of pressure-sensitive adhesive tapes, since materials different from the pressure-sensitive adhesive layer have to be prepared separately and applied to the pressure-sensitive adhesive layer

Method used

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  • Ultraviolet-cured pressure-sensitive adhesive tape or film without supporting substrate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Preparation of single-layer pressure-sensitive adhesive tape:

[0050] DaicelUCB, or LIGHT-TACK PUA 901 or Kyoeisha Chemical., Ltd.'s UV-curable urethane acrylate oligomer EBERCY 2001 (EB2001 ), IRGACURE-2959 of Ciba Specialty Chemicals as the UV initiator and IRGANOX-245 of Ciba Specialty Chemicals as the antioxidant, to obtain HEB2001 and PUA2300.

[0051] Table 1

[0052] HEB2001

[0053] HEB2001 and PUA2300 were respectively mixed with TINUVIN400 from Ciba Specialty Chemicals as the ultraviolet absorber at the mixing ratios shown in Table 2 and Table 3 below.

[0054] Table 2

[0055] HEB2001

[0056] table 3

[0057] PUA2300

[0058] The blended products respectively obtained above were coated by a hand coater to obtain a 0.1 mm seam between two sheets of OPP-40 manufactured by Tohcello Co., Ltd, a 40-μm-thick polypropylene liner. The absorbance of the mixed product was measured as follows. Absorbance was determined from the...

Embodiment 2

[0068] A UV-curable polyurethane oligomer having maleimide was used as the UV-curable oligomer. These UV-curable polyurethane oligomers are ARONTAC UVA-2200-2, UVA-2200-E3 and UVA-2103 (Toagosei Co., Ltd.). ARONTACUVA-2200-2 is a medical grade UV-curable polyurethane oligomer using polypropylene glycol as the polyol. ARONTAC UVA-2200-E3 is a medical grade UV-curable polyurethane oligomer using polyalkylene polyols based on block copolymers comprising 10% ethylene oxide and 90% propylene oxide as the polyol . UVA-2103 is a medical grade UV-curable polyurethane oligomer using polyester polyol as the polyol. To each of these curable oligomers, IRGANOX-245 from Ciba Specialty Chemicals was added as the antioxidant. In the case of UVA-2200-E3, a tackifier including ethyl acrylate / acrylic acid copolymer (AVALURE AC210 of BF-Goodrich) was further added to obtain higher tack and adhesion. The mixing ratios of various pressure-sensitive adhesive compositions are shown in Table 6. ...

Embodiment 3

[0077] A mixture of various UV-curable oligomers is used as the UV-curable oligomer. To the UV-curable oligomer mixture was added UV initiator (IRGACURE-2959), antioxidant (IRGANOX-245) and UV absorber (TINUVIN 400). The formulations of various pressure sensitive adhesive compositions are shown in Table 8 below.

[0078] Table 8

[0079] HA30

HE30

UVH-210T0.05

UVA-2200-2

69.93

69.87

UVA-2200-E3

69.93

UVA-2103

29.97

29.97

PSA-901-1

29.97

IRGANOXI-245

0.10

0.10

0.1

IRGACURE-2959

0.01

TINUVIN 400

0.05

total

100

100

100

[0080] The mixture of ARONTAC UVA-2200-2 and ARONTAC UVA-2103 was left at 90°C for one day until phase separation occurred after complete mixing of the oligomers. Since these blends do not undergo phase separation in a short time, the pressure-sensiti...

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Abstract

A pressure-sensitive adhesive tape or film obtained by curing a UV-curable pressure-sensitive adhesive composition containing a UV-curable polymer or oligomer, wherein the UV curing is controlled to give a higher degree of cure to one surface of the pressure-sensitive adhesive tape or film than that on the opposite surface and thereby the pressure-sensitive adhesive property is suppressed on the one surface and maintained on the opposite surface.

Description

technical field [0001] The present invention relates to a pressure-sensitive adhesive tape or film cured by ultraviolet radiation by controlling the degree of curing in the thickness direction of the pressure-sensitive adhesive tape or film, which does not require a supporting substrate. Background technique [0002] Typically, a pressure-sensitive adhesive tape or film is constructed by applying a pressure-sensitive adhesive to one or both sides of a support substrate, and the support substrate carries the pressure-sensitive adhesive in use. On the other hand, self-supporting pressure-sensitive adhesive tapes (eg, when used without a supporting substrate) are also known. [0003] For example, Japanese Unexamined Patent Publication (Kokai) No. 58-145490 discloses a thin transfer film without a supporting substrate. More specifically, the transfer film includes a pressure-sensitive adhesive layer, an ink-receiving layer composed of fine particles provided on one side of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/00C08F299/06C09J175/16C08G18/67C09J7/10
CPCC08G2170/40C08L33/08C09J2201/134C09J2400/263A61L15/58C08G18/674C09J175/16C09J7/041C09J2475/00C09J7/00C09J7/30C09J7/21C08L2666/04C09J7/10Y10T428/2809C09J2301/1242C08G18/42
Inventor 高贵俊辅
Owner 3M INNOVATIVE PROPERTIES CO
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