Method of using aldehyde-functionalized polymers to increase papermachine performance and enhance sizing
US-9145646-B2 · Sep 29, 2015 · US
Method of increasing paper bulk strength by using a diallylamine acrylamide copolymer in a size press formulation containing starch
US9840810B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9840810-B2 |
| Application number | US-201715601685-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 22, 2017 |
| Priority date | Oct 6, 2014 |
| Publication date | Dec 12, 2017 |
| Grant date | Dec 12, 2017 |
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- Title
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Abstract
Official abstract text for this publication.
The disclosure provides methods and compositions for increasing the strength of a paper sheet. The method involves adding to the paper sheet an amine-containing polymer. The amine-containing polymer interacts with materials such as glyoxalated polyacrylamide or starch to make the paper stronger in terms including tensile strength, surface strength and bulk strength.
First claim
Opening claim text (preview).
What is claimed is: 1. A method of strengthening paper, the method comprising contacting a paper sheet in the dry end of a papermaking process with a composition comprising an amine-containing polymer and does not comprise alkenyl succinic anhydride, wherein the amine-containing polymer comprises one or more structural units selected from the group consisting of: formula I, salts of formula I, formula II, salts of formula II, and any combinations thereof, wherein formulas I and II are according to the following structures: wherein R can be hydrogen or alkyl; and R1, R2, R3, R4, R5, R6 are each independently selected from hydrogen, alkyl, or alkoxylalkyl; and contacting the paper sheet in the dry end of a papermaking process with a composition comprising starch, wherein the composition comprising starch is added independently of the composition comprising the amine-containing polymer at an actives basis dosage of 0.1 to 100,000 gm/ton of oven dried paper sheet. 2. The method according to claim 1 , wherein the amine-containing polymer comprises a diallylamine-acrylamide (DAA/AcAm) polymer. 3. The method according to claim 1 , wherein the amine-containing polymer is added at an actives basis dosage of about 0.1 to about 100,000 gm/ton of oven dried paper sheet. 4. The method according to claim 1 , further comprising contacting the paper sheet in the dry end of a papermaking process with a composition comprising a sizing agent. 5. The method according to claim 1 , wherein the paper sheet is not contacted with a composition comprising a sizing agent in the dry end of a papermaking process.
Assignees
Inventors
Classifications
Starch · CPC title
- D21H17/375Primary
Poly(meth)acrylamide · CPC title
- D21H21/16Primary
Sizing or water-repelling agents · CPC title
Reinforcing agents · CPC title
during paper manufacture · CPC title
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Frequently asked questions
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- What does patent US9840810B2 cover?
- The disclosure provides methods and compositions for increasing the strength of a paper sheet. The method involves adding to the paper sheet an amine-containing polymer. The amine-containing polymer interacts with materials such as glyoxalated polyacrylamide or starch to make the paper stronger in terms including tensile strength, surface strength and bulk strength.
- Who is the assignee on this patent?
- Ecolab Usa Inc
- What technology area does this patent fall under?
- Primary CPC classification D21H17/375. Mapped technology areas include Textiles & Paper.
- When was this patent published?
- Publication date Tue Dec 12 2017 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 12 related publications on this page (citations in our corpus or others sharing the same primary CPC).