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Curable aqueous composition

A technology of composition and water-based composition, which is applied in transportation and packaging, textiles and papermaking, adhesives, etc., can solve the problems of poor wet strength properties, and achieve the effects of reducing discoloration, improving wet strength, and reducing water sensitivity

Inactive Publication Date: 2008-07-23
ROHM & HAAS CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although the amine-containing polyol-based systems provide high wet tensile strength, they are prone to undesirable high-temperature discoloration
On the other hand, systems based on known amine-free polyols such as glycerin show better high temperature color stability but poor wet strength properties

Method used

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  • Curable aqueous composition
  • Curable aqueous composition
  • Curable aqueous composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0090] Synthesis of Polycarboxylated Solution Polymers

[0091] The polymers prepared by this procedure were used in the examples shown in Table 1 below. Into a three liter, four necked flask equipped with a mechanical stirrer, condenser, nitrogen purge, thermometer and inlet for the gradual addition of the monomer, initiator and sodium hypophosphite solutions was charged with 710 grams of deionized water. A chain regulator stock solution was prepared by dissolving 1250 grams of sodium hypophosphite monohydrate in 1528 grams of deionized water. A total of 243.2 grams was withdrawn from this stock solution, half of which (121.6 grams) was added to the water feed and heated to 93°C. The remaining half of the chain regulator solution was used as the co-feed solution. A monomer charge of 1216 grams of glacial acrylic acid was prepared. An initiator solution was prepared by dissolving 12.16 grams of sodium persulfate in 30.7 grams of DI water.

[0092] The acrylic acid, sodium ...

Embodiment 2

[0095] Waterborne Curable Thermoset Compositions:

[0096] Polycarboxy solution polymer + multifunctional polyol

[0097] A series of aqueous curable thermoset compositions were prepared using the polyacrylic acid polymer (pAA) of Example 1 and the following various multifunctional polyols:

[0098] Amine-containing polyols

[0099] - Diethanolamine, functionality 2, (for comparative example 1A)

[0100] - Bis[N,N-bis(β-hydroxyethyl)]adipamide, HEA (for Comparative Example 2A)

[0101] Amine-free polyols

[0102] - Glycerol, functionality 3, (for comparative example 3A)

[0103] - Sorbitol, functionality 6, (for comparative example 4A)

[0104] - Pentaerythritol, functionality 4, (for comparative example 5A)

[0105] - Diglycerol, functionality 4, (for inventive example 1A)

[0106] - Triglycerol, functionality 5, (for inventive example 2A)

[0107] - Ethoxylated (5EO) pentaerythritol with a functionality of 4, (for inventive example 3A)

[0108]- Ethoxylated (4EO) di...

Embodiment 3

[0118] Color Measurement of Cured Thermoset Compositions

[0119] Color measurements were performed to evaluate the degree of discoloration after heating at 250°C for 30 minutes. The thermosetting composition was diluted to a solids content of 20%, and the dry weight of binder addition on the GFA paper was 40% + / - 2% by weight (based on filter paper weight) by applying the diluted composition on GFA glass paper The weight of dry adhesive expressed as a percentage), samples were prepared. GFA paper is available from Whatman (Whatman International Ltd., Maidstone, England). Use a portable spectrophotometer (spectro-guide, purchased from BYK Gardner (BYK Gardner) of Columbia, Maryland, USA) to measure, use D65 illuminant (sunlight), observe at an angle of 10°, and measure according to Procedures well known in the coatings industry were carried out. See, eg, ASTM E1164. Thermosets of the present invention prepared using polyols of Structure I were compared to thermoset composi...

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Abstract

A curable composition, useful as a thermosetting binder, having a polycarboxy polymer or co-polymer and a multifunctional polyol.

Description

technical field [0001] The present invention relates to formaldehyde-free curable aqueous compositions and their use as adhesives in heat-resistant nonwovens. Background technique [0002] Nonwoven fabrics are composed of fibers that can be consolidated before, during, or after forming the nonwoven fabric by purely mechanical means such as needle punching, air laying, and wet laying Entanglement; chemical means, such as treatment with polymer binders; or a combination of mechanical and chemical means. Binders for nonwoven materials mostly comprise resins, such as formaldehyde condensation resins, which include urea-formaldehyde resins (UF), phenol-formaldehyde resins (PF), and melamine-formaldehyde resins (MF). However, formaldehyde is known to be a carcinogen, so users of resins containing formaldehyde are looking for less harmful alternatives. Additionally, these resins are prone to yellowing when exposed to high temperature conditions. [0003] Some nonwovens are used ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L35/00C08K5/053C09J135/00D04H1/58D04H3/12D04H5/04D04H1/4218D04H1/4242D04H1/4258D04H1/4342D04H1/435D04H1/64D04H1/645
CPCC08F2220/1808D04H1/645D04H1/64D04H1/4342C08F2810/20D04H1/4258C08F8/14D04H1/4242D04H1/4218C08F2220/1825D04H1/435Y10T428/31855C08F220/1804C08F120/06C08F212/08C08F220/06C08L33/04C08L33/00C08K5/05
Inventor G·J·G·克拉曼N·科莫
Owner ROHM & HAAS CO