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Self-stick foam adhesive

A technology of adhesive and foam, which is applied in the field of preparation of self-adhesive foam adhesive and self-adhesive acrylic foam adhesive, can solve the problems of multi-step process and high production cost, and achieve economically favorable results

Inactive Publication Date: 2014-04-09
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, while multi-layer foam tapes may function well, their production requires a multi-step process and thus entails high production costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example

[0141] All parts are by weight unless otherwise indicated.

[0142] A. Test Methods and Procedures

[0143] base

[0144] Self-adhesive foam adhesives were tested for their self-adhesive properties on the following substrates:

[0145] - Steel: stainless steel (SS) plate ("Edelstahl 1, 4301 IIID", 150 x 50 x 2 mm), available from Rocholl GmbH, Aglatershausen, Germany.

[0146] -PP: Polypropylene sheet ( PP nature"; Fabrikat Simona HWST; 150 cm x 50 x 2 mm), available from Rocholl GmbH, Aglatershausen, Germany.

[0147]- 13 mil (330 micron) thick polyethylene foil obtained from polyethylene pellets available under the trade designation "VORIDIAN POLYETHYLENE 1550P" from Eastman Chemical Co., Kingsport, TN The material is self-made. The foil was fixed on an aluminum plate (150 cm x 50 x 2 mm) and tested on the smooth side.

[0148] -UreGloss: one-component clear coat, available from BASF (BASF)

[0149] -CeramiClear5: Acrylic clear coat from PPG Industries (PPG Indus...

example 1 to 3 and comparative example C-1 to C-3

[0183] In Examples 1 to 3, prepared from a monomer composition of 92 wt. curable precursor. The monomer composition was partially polymerized according to the general procedure described. To 100 parts of this monomer composition were added 0.12 parts of HDDA, 10 parts of tackifier REGALREZ6108, 6 parts of glass bubble K15 and 3 parts of AEROSIL972. Comparative examples C-1 and C-2 were prepared in the same manner, but using 5 parts of cyclohexyl acrylate (CHA) (C-1) or benzyl acrylate (C-2) instead of monomer ii). Comparative Example C-3 was prepared using a monomer mixture of 1OA / AA95 / 5 without addition of monomer ii). 0.13 pph of OMNIRAD BDK photoinitiator was added and the curable precursor was coated and cured according to the general procedure shown above.

[0184] Self-adhesive foam adhesives were tested on different substrates for 90° peel (Finat No. 2) and static shear (Finat No. 8) on SS. The results are given in Table 1:

[0185] Table 1

[0186]

[0187] ...

example 4 to 6 and comparative example C-4 to C-5

[0189] In Examples 4 to 6, self-adhesive foam adhesives were prepared from a monomer composition of 82.5% by weight of IOA, 2.5% by weight of AA and 15% by weight of monomer ii) as given in Table 2. Monomers were prepolymerized into syrups according to the general procedure described. To 100 parts of this slurry was added 0.12 parts of HDDA, 10 parts of REGALREZ6108, 6 parts of glass bubble K15 and 3 parts of AEROSIL972. 0.13 pph of OMNIRAD BDK photoinitiator was added and the curable precursor was coated and cured according to the general procedure shown above. Comparative Example C-4 was prepared as in Example 1, but without the addition of tackifier. Comparative Example C-5 was prepared using a monomer mixture of 1OA / AA97.5 / 2.5 without addition of monomer ii).

[0190] Self-adhesive foam adhesives were tested on different substrates for 90° peel (Finat No. 2) and static shear (Finat No. 8) on SS. The results are shown in Table 2.

[0191] Table 2

[0192]

[0193]...

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Abstract

The present invention relates to a method of making a self-stick foam adhesive, comprising a. a crosslinked (meth)acrylate polymer comprising repeating units derivable from a monomer composition comprising iv. 55 to 97.4 wt. % of one or more alkyl (meth)acrylate monomers, the alkyl groups of which comprise from 4 to 14 carbon atoms v. 2.5 to 40 wt. % of one or more ethylenically unsaturated monomers comprising a nitrogen- or oxygen containing heterocyclic ring vi. 0.1 to 5 wt. % of one or more polar comonomers b. 1 to 60 parts by weight of one or more hydrogenated resin tackifier per 100 parts by weight of the cross-linked (meth)acrylate polymer and c. 1 to 20 parts by weight microspheres per 100 parts by weight of the cross-linked (meth)acrylate polymer, the method comprising polymerizing monomer components of the monomer composition and wherein at least part of the polymerization is carried in the presence of crosslinking agent, the total amount of crosslinking agent used in the polymerization being between 0.01 and 2 parts by weight per 100 parts by weight of the monomer composition, 1 to 60 parts of one or more hydrogenated resin tackifier per 100 parts by weight of the monomer composition and 1 to 20 parts microspheres per 100 parts of the monomer composition and wherein the polymerization is initiated by radiation substantially in the absence of solvent. The present invention also relates to a self-stick foam adhesive obtainable by such method.

Description

[0001] Cross References to Related Applications [0002] This patent application claims the benefit of European Patent Application No. 11176047.6 filed on July 29, 2011, the disclosure of which is hereby incorporated by reference in its entirety. technical field [0003] The present invention relates to a process for the preparation of self-adhesive foam adhesives. The present invention also relates to self-adhesive foam adhesives having high internal strength and high adhesion to a variety of substrates. The invention also relates to articles comprising self-adhesive foam adhesives and uses of self-adhesive acrylic foam adhesives. Background technique [0004] Pressure sensitive adhesives (PSAs) are well known and used in many applications. For example, body side moldings can be permanently assembled to motor vehicles with the aid of multilayer PSAs, which typically include a foamed core laminated with thinner surface layers of pressure sensitive adhesive on both sides ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B5/20C09J5/08C09J133/00
CPCC09J11/04B32B5/18C09J133/08C09J133/10C09J7/0217C09J133/14C09J2400/24C08F220/18B32B5/20C09J5/08C09J11/06C09J7/385C08F220/1808Y10T156/10Y10T428/1405Y10T428/249971C08F226/06C08F220/06C08F222/102
Inventor S·特拉瑟J·D·福斯特
Owner 3M INNOVATIVE PROPERTIES CO
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