Pressure sensitive adhesive composition and product thereof

A composition and pressure-sensitive adhesive technology, applied in the direction of pressure-sensitive films/sheets, non-polymer organic compound adhesives, adhesives, etc., can solve problems such as deterioration of adhesion and unsatisfactory effects

Inactive Publication Date: 2016-04-20
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, when the curved substrate is a transparent plastic substrate (i.e., polycarbonate board), since the plastic substrate usually forms air bubbles at high temperatures, it is more prone to adhesion failure at the interface, not only through transparent drop b

Method used

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  • Pressure sensitive adhesive composition and product thereof
  • Pressure sensitive adhesive composition and product thereof
  • Pressure sensitive adhesive composition and product thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0039] Preparation of pressure sensitive adhesive composition

[0040] There is no particular limitation on the preparation method of the pressure-sensitive adhesive composition, for example, solution polymerization, suspension polymerization, emulsion polymerization, UV light or electron beam printing and distribution polymerization can be used.

[0041] The pressure-sensitive adhesive composition of the present invention is prepared by methods or steps known in the industry, such as the method mentioned in patent WO200494549A1: (1) preparing acrylate copolymer; (2) preparing acrylate oligomer; (3) preparing The prepared acrylate copolymer and acrylate oligomer are mixed and a certain amount of crosslinking agent is added to finally obtain the desired pressure-sensitive adhesive solution.

[0042] Preparation of pressure sensitive tape

[0043] The pressure-sensitive adhesive composition involved in the present invention can be coated with a high molecular weight, low gl...

specific Embodiment approach

[0049] Item 1 is a pressure-sensitive adhesive composition comprising the reaction product of the following reaction components: an acrylate copolymer having pendant carboxyl groups formed from a first monomer mixture containing a carboxyl-containing monomer, wherein the carboxyl-containing monomer The content is 0.1-10wt.%, with the total weight of the first monomer mixture used to form the acrylate copolymer with side carboxyl group as 100wt.%, the glass transition of the acrylate copolymer with side carboxyl group The temperature Tg is greater than or equal to -55°C, and less than or equal to -30°C; 1-25wt.% of acrylate oligomers, based on the total weight of acrylate copolymers and acrylate oligomers with side carboxyl groups as 100wt. %, the weight-average molecular weight of the acrylate oligomer is greater than or equal to 20,000 Da, and its glass transition temperature Tg is greater than or equal to 25 ° C; The total weight of the carboxyl acrylate copolymer and acryla...

Embodiment

[0062] The present invention will be described more specifically below in conjunction with examples, but the present invention is not limited to these examples.

[0063] raw material

[0064] The raw material that the embodiment of the present invention adopts is listed as table 1:

[0065] Table 1

[0066]

[0067]

[0068] testing method

[0069] Peel force test at room temperature at 180°C

[0070] The test procedure for peel force at room temperature at 180°C is as described in ASTM International Standard D3330. The test was completed on an Instron tensile tester with a peeling speed of 304.8 / min. The substrate to be adhered is polycarbonate PC board. The PC board is brand new, tear off the protective film on one side to expose a fresh surface as the surface to be glued. The sample preparation method is to roll a 25.4mm*200mm tape sample back and forth with a 1kg rubber roller once to adhere to the surface of the PC board, and place the sample to be tested ...

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Abstract

The invention relates to a pressure sensitive adhesive composition. The pressure sensitive adhesive composition comprises acrylate copolymer which is prepared from a first monomer mixture containing carboxyl-containing monomer and has side carboxy groups, wherein the content of the carboxyl-containing monomer ranges from, by weight, 0.1% to 10%, and provided that the total weight of the first monomer mixture which forms the acrylate copolymer having the side carboxy groups is 100%, the glass-transition temperature Tg of the acrylate copolymer having the side carboxy groups is equal to or greater than minus 55 DEG C and less than or equal to minus 30 DEGC. The pressure sensitive adhesive composition further comprises acrylate oligomer and terpenic tackifying resin, wherein the weight-average molecular weight of the acrylate oligomer is greater than or equal to 20, 000Da, the glass-transition temperature Tg of the acrylate oligomer is greater than or equal to 25 DEG C, and provided that the total weight of the acrylate copolymer having the side carboxy groups and the acrylate oligomer is 100%, the content of the acrylate oligomer ranges from 1%-25%, and the content of the terpenic tackifying resin ranges from 1% to 20%. The pressure sensitive adhesive composition achieves high peel strength at the room temperature and high cohesion at the high temperature simultaneously and excellent warping resistance and blistering resistance.

Description

technical field [0001] The invention relates to a pressure-sensitive adhesive composition and a pressure-sensitive adhesive sheet product prepared therefrom. Background technique [0002] Pressure sensitive tape is virtually ubiquitous in homes and workplaces. In the simplest construction of a pressure sensitive tape, it includes an adhesive and a backing, and the overall construction is tacky at use temperatures and adheres to a variety of substrates using only moderate pressure to form a bond. In this way, the pressure-sensitive adhesive tape constitutes a complete self-sustaining adhesive system. [0003] According to the Pressure Sensitive Tape Association, pressure sensitive adhesives (PSAs) are known to have properties that include: (1) strong and long-lasting adhesion; (2) adhesion with no more than finger pressure; (3) have sufficient ability to hold onto the substrate; and (4) have sufficient cohesive strength to enable clean removal from the substrate. Materials...

Claims

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Application Information

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IPC IPC(8): C09J133/08C09J133/12C09J11/08C09J7/02
CPCC09J7/255C09J7/22C09J7/38C09J11/08C09J133/08C08L2205/025C08L2205/03C08L2205/02C09J2467/006C09J2301/40C09J2301/414C09J2301/302C08F220/1808C08L33/08C08L45/00C08L33/12C09J4/06C09J133/06C08F220/06C08L57/00C09J7/385C09J2433/00
Inventor 张云舒蒋晓明王蜀珺陈中
Owner 3M INNOVATIVE PROPERTIES CO
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