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Fast disintegrating nonwoven binder

A non-woven and adhesive technology, used in non-woven fabrics, textiles and papermaking, preparations for skin care, etc., can solve problems such as inability to disperse, difficult to transport, and must be prepared on site

Active Publication Date: 2017-04-19
DOW GLOBAL TECH LLC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, they may not be able to disperse in some environments (such as in hard water)
Other binders can be difficult to transport commercially and must be formulated on site

Method used

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  • Fast disintegrating nonwoven binder
  • Fast disintegrating nonwoven binder
  • Fast disintegrating nonwoven binder

Examples

Experimental program
Comparison scheme
Effect test

example

[0044] all abbreviations used

[0045] AA = acrylic acid

[0046] EA = ethyl acrylate

[0047] IA = itaconic acid

[0048] MMA = methyl methacrylate

[0049] Sty = styrene

[0050] polymer synthesis

[0051] To a 5000 ml round bottom flask equipped with a stir bar, condenser, temperature monitor, heating mantle and nitrogen inlet was added 1850 grams of deionized water which was subsequently heated to 85°C. A monomer premix was prepared from 800 grams of deionized water, 26.7 grams of Disponil FES 993 (polyethylene glycol ether sulfate sodium salt), 8.0 grams of itaconic acid, 16.0 grams of styrene, 1424 grams of ethyl acrylate, and 152 grams of glacial acrylic acid. With the reactor water at 84°C, 7.2 grams of ammonium persulfate (APS) dissolved in 51 grams of water were added. The premix feed was started at 12.1 g / min. After 20 minutes, the feed rate was increased to 24.3 g / min. Simultaneously, a feed of 2.4 grams of ammonium persulfate dissolved in 200 grams of ...

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Abstract

A method for forming a dispersible nonwoven substrate in an aqueous medium comprising, consisting of, or consisting essentially of contacting a fibrous substrate with an aqueous nonwoven binder comprising an emulsion polymer having a polydispersity index of at least 10, a weight average molecular weight of less than 1,000,000 and from 8 weight percent to 22 weight percent acid monomer, based on the weight of the emulsion polymer, is disclosed. The aqueous nonwoven binder can be prepared by a method comprising the steps of: a) emulsion polymerizing at least one mono-ethylenically unsaturated monomer and at least one acid monomer in an aqueous solution using an initiator wherein the initiator is present in the aqueous solution in an amount in the range of from 0.5 weight percent to 1.5 weight percent, based on the total weight of the monomers, to form the emulsion polymer; and b) neutralizing the emulsion polymer with a neutralizer selected from the group consisting of an amine having a pKb of 4 to 7, an alkali hydroxide, and combinations thereof to form the aqueous nonwoven binder. The dispersible nonwoven substrates can be used to produce dispersible wipes, such as baby wipes, personal care wipes, cleaning wipes, or any other wet nonwoven containing lotion having a pH of below 5 or 6.

Description

[0001] References to related applications [0002] This application claims the benefit of US Provisional Application No. 62 / 039,697, filed August 20, 2014, which is hereby incorporated by reference in its entirety. technical field [0003] The present invention relates to methods for forming dispersible nonwoven substrate compositions and dispersible nonwoven substrates made therefrom. Background technique [0004] Currently, the wastewater treatment industry is focused on disposable products such as wet wipes, which cause equipment clogging, causing difficulties at the wastewater treatment facility and resulting in downtime. Accordingly, wet wipes having sufficient tensile strength to disperse readily in water in use are desirable. [0005] Various binders have been developed to increase dispersibility in water after toilet flushing. Examples include binders that take advantage of the pH difference between the liquid / lotion used in wet wipes and water to provide dispersi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61K8/81A61K8/02A61F13/47A61Q19/00D04H1/587D04H1/64A47L13/16
CPCA47L13/16A61F13/47A61K8/0208A61K8/8164A61Q19/00D04H1/587D04H1/64C08F220/1802C08F220/06C08F212/08C08F222/02A61K8/06A61K2800/20A61Q19/10
Inventor M·B·纳恩K·S·莱斯D·A·克莱恩I·A·汤姆林森
Owner DOW GLOBAL TECH LLC
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