2-octyl (meth)acrylate adhesive composition

A technology of adhesives and compositions, applied in the directions of ester copolymer adhesives, adhesive types, adhesives, etc., can solve the problems of unstable price and supply of adhesive products

Active Publication Date: 2009-08-26
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The increase in oil prices, and the concomitant increase in the prices of petroleum-derived products, has led to price and supply instability for many adhesive products

Method used

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  • 2-octyl (meth)acrylate adhesive composition
  • 2-octyl (meth)acrylate adhesive composition
  • 2-octyl (meth)acrylate adhesive composition

Examples

Experimental program
Comparison scheme
Effect test

example

[0088] These examples are for illustrative purposes only, and are not intended to limit the scope of the appended claims. All parts, percentages, ratios, etc. in the examples, as well as in the remainder of the specification, are by weight unless otherwise indicated. Solvents and other reagents used were obtained from Sigma-Aldrich Chemical Company, Milwaukee, Wisconsin unless otherwise indicated.

[0089] Acronym

[0090] abbreviation or trade name

illustrate

2-OA

2-octyl acrylate

IOA

Isooctyl acrylate

AAA

acrylic

VAZO67

Available from DuPont, Wilmington, DE

Commercially available 2,2'-azobis-(2-methylbutyronitrile) radical initiator.

IV

intrinsic viscosity

PDI

polydispersity index

B-212

Bisamide crosslinker, 1,1'-isophthaloyl-bis(2-methylaziridine) (CAS No.

7652-64-4), in solution as a 5% by weight solution of the bisamide in toluene.

THF

Tetrahyd...

preparation example 1

[0096] Preparation example 1: 2-octyl acrylate

[0097]2-octanol (268.51 g, 2.1 moles), AA (183.75 g, 2.6 moles), p-toluenesulfonic acid monohydrate (5.00 g, 26 mmol), toluene (250 g) and phenothiazine (1.0 g) mixture was heated to reflux. Water was separated from the toluene / water azeotrope using a Dean Stark distillation interceptor. After 6 hours at reflux, a total of 37 ml of water was collected in the distillation trap. The reaction mixture was washed with 1 molar aqueous sodium hydroxide (200 mL), and concentrated under reduced pressure. The remaining oil was distilled under reduced pressure (2 mm Hg at 65-67°C) to give the product as a colorless oil. (Yield: 248.6 g)

example 1-2 and comparative example C1-C2

[0099] Part 1: Solution Polymerization

[0100] For Examples 1 and 2, solution copolymerization of 2-OA and AA was accomplished by blending the materials shown in Table 1 in a glass jar, purging with nitrogen for 15 minutes, and sealing the jar. Place the jar in a water bath at 60°C with shaking at 110 rpm for 18 to 20 hours. The same procedure was used for Comparative Examples C1 and C2, except that 2-OA was replaced by IOA. The molecular weight of the resulting polymer (M w ) and PDI were determined by GPC, and intrinsic viscosity (IV) was determined by a #50 viscometer at a solution concentration of 0.5 g / dL in THF. These data are shown in Table 1 below.

[0101] Table 1

[0102] example

2-OA

(gram)

IOA

(gram)

AAA

(gram)

VAZO

67(g)

ethyl acetate

(gram)

IV

m w

(g / mol)

PDI

1

23.75

----

1.25

0.025

37.5

0.9

3.7×10 5

3.8

...

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PUM

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Abstract

A pressure sensitive adhesive composition comprising a 2-octyl (meth)acrylate / (meth)acrylic acid copolymer and a crosslinking agent is described. The adhesive composition may be derived from renewable resources and provides good peel, shear and high temperature stability.

Description

Background technique [0001] Pressure sensitive adhesives (PSAs) are known to have properties including: (1) strong and durable tack, (2) cohesiveness under no more than finger pressure, (3) adequate retention on adherends or on the substrate, and (4) sufficient bond strength to enable clean removal from the adherend. Materials that have been found to function well as PSAs include polymers designed and formulated to exhibit the desired viscoelastic properties resulting in a desired balance of tack, peel adhesion, and shear holding power. PSAs are characterized as being generally viscous at room temperature (eg, 20°C). PSAs do not include compositions simply because they are sticky or capable of adhering to certain surfaces. [0002] Only a limited number of one class of polymers have been found useful as PSAs. Among these classes of polymers are natural and synthetic rubbers, (meth)acrylic polymers, silicones, block copolymers and olefins. Acrylic polymers have proven parti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J133/00
CPCC08K5/34C08K5/29C08K5/1515C08K5/3412C09J133/08Y10T428/28Y10T428/2891B32B27/30C09J133/06
Inventor 凯利·S·安德森凯文·M·莱万多夫斯基杜安·D·范斯勒巴布·N·加德丹尤金·G·约瑟夫
Owner 3M INNOVATIVE PROPERTIES CO
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