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Polymers derived from secondary alkyl (meth)acrylates

An acrylate, polymer technology for use in the field of polymers derived from secondary alkyl (meth)acrylates

Active Publication Date: 2013-08-07
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The present invention provides a solution to the problems associated with the use of longer linear alkyl chains in (meth)acrylate polymers, especially for Those in Pressure Sensitive Adhesives (PSAs)

Method used

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  • Polymers derived from secondary alkyl (meth)acrylates
  • Polymers derived from secondary alkyl (meth)acrylates
  • Polymers derived from secondary alkyl (meth)acrylates

Examples

Experimental program
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example

[0271] Objects and advantages of this invention are further illustrated by the following examples, but the particular materials and amounts thereof recited in these examples, as well as other conditions and details, should not be construed to unduly limit this invention. Unless otherwise noted, materials used in the following examples were purchased from Alfa Aesar (Ward Hill, MA) or Sigma-Aldrich Company, St. Louis, MO. (St. Louis, MO)).

[0272] Test Method 1: Differential Scanning Calorimetry (DSC) Analysis of Monomer and Homopolymer Films

[0273] Approximately 10 mg of a given monomer was placed on a separate standard aluminum DSC pan (Thermal Analysis T080715), which was then placed in a Differential Scanning Calorimeter (DSC, TA Instruments, New Castle, Delaware). DE)) in the autosampler. For the analysis of each sample, the disc was placed individually on one of the differential posts in the closed cell of the DSC and an empty reference disc was placed on the oppos...

example 1

[0285] Example 1: Octyl Acrylate Isomer Blend from 1-Octene

[0286] To 200.0 grams (g) (1.782 moles, 1 equivalent (eq)) of 1-octene at 50°C was added 145.1 g (2.014 moles, 1.13 eq) of acrylic acid (Alfa Aesar) and 5.349 g (0.03564 mol, 0.02 eq) solution of trifluoromethanesulfonic acid (Alfa Aesar). After holding at 50°C for 10 minutes, the mixture was heated to 70°C with an exotherm to 90°C. The mixture was cooled to 70°C within one hour and kept at 70°C for 15 hours. 411.3 g of a 9.1% by weight sodium bicarbonate solution (saturated aqueous solution) (0.4456 mol, 0.25 eq) were added to the reaction mixture. The mixture was stirred for 30 minutes, then allowed to separate the phases. Further, 411.3 g of a 9.1% by weight sodium bicarbonate solution (saturated aqueous solution) (0.4456 mol, 0.25 eq) was added thereto and stirred for 30 minutes. 300 mg phenothiazine and 100 mg (methoxyhydroquinone) (MEHQ) (Alfa Aesar) were added to the organic phase and the mixture was di...

example 2

[0287] Example 2: Octyl Acrylate Prepared Using Excess Acrylic Acid

[0288] To 10.0 g (0.0891 moles, 1 eq) of 1-octene and 0.00679 g of copper(II) chloride dihydrate were added 19.2 g (0.267 moles, 3 eq) of acrylic acid and 0.802 g (0.00534 moles, 0.06 eq) of triflic acid mixture. The mixture was heated to 40°C for 30 minutes, then to 70°C for 15 hours. The reaction gave an 83% conversion of the desired acrylate based on the 1-octene consumed.

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Abstract

Polymers, particularly those used in pressure-sensitive adhesives, are prepared from a mixture of structural isomers of a secondary alkyl(meth)acrylate monomer. The adhesives are characterized by exhibiting an overall balance of adhesive and cohesive characteristics and exceptional adhesion to low surface energy substrates.

Description

[0001] Cross references to related patent applications [0002] This patent application claims priority to US Provisional Patent Application Serial No. 61 / 425317, filed December 21, 2010, which is incorporated herein by reference. Background technique [0003] Pressure sensitive tapes are ubiquitous in homes and workplaces. In its simplest construction, a pressure sensitive tape includes an adhesive and a backing, the overall construction is tacky at use temperatures, and adheres to a variety of substrates with only moderate pressure to form a bond. In this way, the pressure sensitive tape constitutes a complete self-contained bonding system. [0004] Pressure Sensitive Adhesives (PSA) generally refers to a class of adhesives with the following properties: (1) strong and long-lasting tack; (2) bonds with no more than fingertip pressure; remain on the adherend; and (4) have sufficient adhesive strength to allow clean removal from the adherend. Materials that have been found...

Claims

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Application Information

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IPC IPC(8): C08F220/18C07C69/54C09J133/08C07C67/00C09J133/10
CPCC09J133/08C08F220/10C09J133/10C07C69/54C08F220/18C07C67/04C09J7/0217Y02P20/582C09J7/385Y10T428/2891C08F220/1808C09J133/06
Inventor J·D·克拉珀K·M·勒万多维斯基D·E·沃格尔K·M·沃格尔J·L·科尔比
Owner 3M INNOVATIVE PROPERTIES CO
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