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Carboxylated vinyl acetate/ethylene copolymer dispersions and uses therof
US11214684B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11214684-B2 |
| Application number | US-201616082565-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 6, 2016 |
| Priority date | Dec 9, 2015 |
| Publication date | Jan 4, 2022 |
| Grant date | Jan 4, 2022 |
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- Title
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Abstract
Official abstract text for this publication.
The present invention relates to preparation of heterogeneous mixtures of (carboxylated) vinyl ester/ethylene dispersions, such as vinyl acetate/ethylene (VAE) dispersions with polyamideamine-epichlorohydrin (PAE) wet strength resins having a reduced amount of halogenated organic compounds, such as less than 1500 ppm. The dispersion offers extremely low free and bound formaldehyde levels combined with wet tensile strength for use in non-woven textile and paper applications.
First claim
Opening claim text (preview).
The invention claimed is: 1. A low-formaldehyde containing dispersion of a vinyl ester/ethylene copolymer containing copolymerized carboxylic acid groups or salts thereof blended with a wet strength polyamidoamine-epichlorohydrin (PAE) resin; wherein: a) the vinyl ester/ethylene copolymer dispersion is free of reactive N-methylol acrylamide groups; b) the PAE comprises less than 800 ppm halogenated organic compounds; c) the weight ratio of the vinyl ester/ethylene copolymer to the PAE resin is from 75:25 to 40:60; and d) the pH is greater than 7. 2. A composition produced by blending the vinyl ester/ethylene copolymer dispersion and a PAE resin according to claim 1 , wherein the vinyl ester is vinyl acetate.
Assignees
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Classifications
the bonding agent being applied in wet state, e.g. chemical agents in dispersions or solutions · CPC title
characterised by the bonding agents used · CPC title
- C08L79/02Primary
Polyamines · CPC title
Homopolymers or copolymers of vinyl acetate · CPC title
- C08F218/08Primary
Vinyl acetate · CPC title
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- What does patent US11214684B2 cover?
- The present invention relates to preparation of heterogeneous mixtures of (carboxylated) vinyl ester/ethylene dispersions, such as vinyl acetate/ethylene (VAE) dispersions with polyamideamine-epichlorohydrin (PAE) wet strength resins having a reduced amount of halogenated organic compounds, such as less than 1500 ppm. The dispersion offers extremely low free and bound formaldehyde levels combin…
- Who is the assignee on this patent?
- Celanese Int Corp
- What technology area does this patent fall under?
- Primary CPC classification C08L79/02. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Jan 04 2022 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).