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Method for adhering water soluble polymer films

A water-soluble polymer, polymer technology, applied in chemical instruments and methods, synthetic resin layered products, coatings, etc.

Active Publication Date: 2018-07-17
ROHM & HAAS CO +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, combinations of these materials often do not provide good bond strength between films

Method used

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  • Method for adhering water soluble polymer films
  • Method for adhering water soluble polymer films
  • Method for adhering water soluble polymer films

Examples

Experimental program
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example

[0032] abbreviation :

[0033] BA n-butyl acrylate

[0034] EA ethyl acrylate

[0035] EHA 2-Ethylhexyl Acrylate

[0036] HEMA 2-Hydroxyethyl methacrylate

[0037] MAA Methacrylic acid

[0038] MMA methyl methacrylate

example 1-2

[0039] Example 1-2: Sealing solution containing ≥40wt% water, ≤60wt% isopropanol (IPA) and

[0040] By mixing the desired amount of water, isopropanol, and metal salt (CaCl 2 ) were mixed together to prepare two sealing solutions having the compositions shown in Table 1. The solution was stirred on a magnetic stir plate for 10 minutes and sonicated for 30 minutes before use. About 100 μm water soluble films were prepared by knife coating formulations containing blends of acrylic polymers with specific glass transition temperatures and other additives (Table 2). The membranes exhibit various desirable properties, including stability in high ionic strength aqueous solutions, and the ability to readily dissolve when ionic strength is reduced. The sealing strength of each sealing solution was then characterized by measuring the prepared samples using the INSTRON tensile test according to the method specified in ASTM F88 (Technique A). Specifically, the sealing solution was a...

example 3-5

[0051] Examples 3-5: Sealing Solutions Containing Water and Propylene Glycol (PG)

[0052] Two sealing solutions with the compositions shown in Table 4 were prepared by mixing the solvents together in glass vials. The solution was stirred on a magnetic stir plate for 10 minutes and sonicated for 30 minutes before use. Approximately 100 μm thick films containing the water soluble coating formulations in Table 2 were prepared using the method described in Example 1. The prepared film was sealed between two aluminum plates in a compression molding machine under a force of 5000 psi for 1 minute. The seal strength of the sealing solution was characterized as >11N using the method specified in ASTM F88.

[0053] Table 4. Seal Strength of Sealing Solutions.

[0054]

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Abstract

A method for adhering water soluble polymer films by applying to at least one of the films a solution comprising: (a) from 60 to 90 wt% water, (b) from 10 to 40 wt% isopropanol, and (c) from 0 to 5 wt% polyvalent metal salts.

Description

technical field [0001] The present invention relates to a method for adhering water-soluble polymer films. Background technique [0002] Detergent sachet formulations are known, for example high salt formulations in polyvinyl alcohol sachets. Typically, a water-soluble polymer film is adhered to form a pouch using a sealant consisting of a good solvent for the polymer system that readily dissolves the polymer to form the bag between the two polymer films (e.g., water). A good seal is formed between them. WO2004 / 009335 discloses sealing solutions containing mixtures of polyols and alcohols. However, combinations of these materials often do not provide good bond strength between films. [0003] The problem addressed by the present invention is the need for an improved method for adhering water-soluble polymer films. Contents of the invention [0004] The present invention provides a method for adhering at least one of water-soluble polymer films by applying to said film ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/12C08J7/02C08J7/06C08J7/052
CPCC08J7/02C08J7/06C08J2333/08C08J2333/12C08J5/122C08J7/052B32B27/08B32B27/308B32B37/0038B32B37/16C08J2433/12
Inventor J·高V·普拉萨德S·J·菲茨克A·S·卡里卡利金鑫
Owner ROHM & HAAS CO
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