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Water-whitening resistant latex emulsion pressure sensitive adhesive and its production

A technology of pressure-sensitive adhesives and water-based adhesives, applied in the direction of adhesives, adhesive types, ester copolymer adhesives, etc., to achieve good wettability

Inactive Publication Date: 2006-08-23
ASHLAND LICENSING & INTPROP LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

None of the above documents disclose pressure sensitive adhesives that maintain adhesion and water blush resistance in a hot water environment

Method used

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  • Water-whitening resistant latex emulsion pressure sensitive adhesive and its production
  • Water-whitening resistant latex emulsion pressure sensitive adhesive and its production
  • Water-whitening resistant latex emulsion pressure sensitive adhesive and its production

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A typical formulation of the pressure sensitive adhesive of the present invention is as follows:

[0043] components

Weight % based on latex

water

51.80

sodium bicarbonate

0.10

Hitenol BC-10 *

1.12

70% tert-butyl hydroperoxide

0.19

2-Ethylhexyl Acrylate

32.27

Styrene

7.61

Methyl methacrylate

3.81

β-carboxyethyl acrylate

2.48

Methacrylate

1.50

Zinc formaldehyde sulfoxylate

0.12

[0044] * Hitenol BC-10 is poly(oxy-1,2-ethanediyl), α-sulfo-ω-(4-nonyl-2-(1-propenyl)phenoxy Base) branched ammonium salt; yellow-brown viscous liquid, 97.0% active matter, combined sulfuric acid content is 8.70-9.70%, pH value is 6.5-8.5 (1% solution).

[0045] A typical synthetic description is as follows:

[0046] Preparation of pre-emulsion

[0047] Into a 500 ml pre-emulsification vessel with a turbine agitator was added deionized water...

Embodiment 12

[0070] Add deionized water (462.0 g) and Hitenol BC-10 to a 2000 ml four-port jacketed glass reactor with turbine stirrer, thermocouple, circulating water bath, nitrogen bubbling and pre-emulsion and reducing agent delivery lines. Polymeric Surfactant (3.60 grams). Start nitrogen bubbling, set the stirring speed at 200 rpm, and turn on the circulating water bath. A monomer mixture consisting of 33.7 grams of carboxyethyl acrylate, 0.2 grams of methacrylic acid, 475.0 grams of 2-ethylhexyl acrylate, and 132.0 grams of styrene was added to a mixture containing 1.3 grams of sodium bicarbonate, 1.9 grams of 70% tert-butyl Hydroperoxide-based initiator and 14.6 grams of Hitenol BC-10 polymerizable anionic surfactant in 217.1 grams of water and stirred long enough to form a stable pre-emulsion material. Separately, a reductant feed containing 1.2 grams of zinc formaldehyde sulfoxylate in 42 grams of water was prepared and added to the storage tank of the peristaltic pump for final ...

Embodiment 13

[0072] Example 12 was repeated except that 0.2 grams of n-dodecanethiol was included in the pre-emulsion mixture.

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PUM

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Abstract

An aqueous, blush-retardant pressure sensitive adhesive (PSA) is made from an aqueous latex emulsion having an average particle size diameter of not substantially above about 100 nm and emulsified in the presence of an emulsifier consisting essentially of: Formula (I) wherein n is an integer ranging from 1-200.

Description

technical field [0001] The present invention relates to pressure sensitive adhesives based on aqueous latex emulsions and to a process for preparing the adhesives. The pressure sensitive adhesives prepared according to the present invention have an average particle size of less than or equal to about 100 nanometers and a narrow particle size distribution. These pressure sensitive adhesives are particularly suitable for those applications that require the pressure sensitive adhesive to maintain adhesion between the substrate and facestock when exposed to hot water sprays and immersion in hot water. Also, these adhesives exhibit water blush resistance or "blush resistance," which is typically measured by cold or ice water immersion tests. Hot water adhesion is required in applications such as bottle labels exposed to hot water spray during laundering operations. In general, water whitening resistance is required wherever a pressure sensitive adhesive with a transparent facesto...

Claims

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Application Information

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IPC IPC(8): C09J125/14C09J125/18C09J129/10C09J141/00C09J133/06H03G1/00
CPCC09J133/062H03G1/0088Y10T428/14C09J125/14C08F220/06C09J4/00C08F220/18C09J2201/606C09J2301/302C08F220/1808C09J125/00C09J125/18C09J129/10
Inventor 科利斯·J·理查兹赵亚秋斯科特·R·哈维
Owner ASHLAND LICENSING & INTPROP LLC
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