(Meth)acrylamide Polymer Papermaking Additive Production

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Solution Overview

Problem

The use of (meth)acrylamide in paper products is not preferable for human consumption due to regulatory concerns, particularly in food packaging, as it is subject to restrictions by agencies like the FDA, necessitating a reduction in (meth)acrylamide content without compromising the paper's properties.

Innovation Solution

A method for producing a (meth)acrylamide polymer papermaking additive by polymerizing a polymerization component containing (meth)acrylamide, a tertiary amino monomer, and a (meth)allyl sulfonate in a multi-step process, where the ratio of these components is carefully controlled to minimize (meth)acrylamide content while maintaining additive properties.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If (meth)acrylamide is used as a papermaking additive to improve paper strength and runnability, then the papermaking properties are improved, but the (meth)acrylamide content in the paper product increases which is harmful for food packaging applications

Engineering Contradiction:

Improvepaper strengthVSAvoidmethyleneacrylamide content in paper product

Core Design Contradiction:

StrengthVSObject-affected harmful factors

Solution Approach 1:

The patent divides the polymerization process into two distinct steps: first polymerizing (meth)acrylamide separately, then polymerizing tertiary amino monomer separately in the presence of the first polymer. This segmentation prevents direct copolymerization and reduces residual (meth)acrylamide in the final product while maintaining papermaking effectiveness.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The first polymer acts as an intermediary carrier that provides papermaking functionality while the second polymerization step adds tertiary amino groups. This intermediary approach allows the system to achieve both paper strengthening and reduced harmful content by separating the functional roles into distinct polymerization stages.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Object-affected harmful factors

If the ratio of tertiary amino monomer to (meth)acrylamide is increased to reduce harmful content, then the (meth)acrylamide content decreases, but the papermaking additive properties may be compromised

Engineering Contradiction:

Improvemethyleneacrylamide content in paper productVSAvoidpapermaking additive properties

Core Design Contradiction:

Object-affected harmful factorsVSReliability

Solution Approach 1:

The patent optimizes specific parameter ranges: tertiary amino monomer at 0.01-10 mol% relative to (meth)acrylamide, and (meth)allyl sulfonate at 0.1-10 mol% relative to (meth)acrylamide. These parameter changes ensure sufficient reduction of harmful content while maintaining adequate papermaking functionality through controlled composition ratios.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent creates a composite polymer system combining (meth)acrylamide units from the first polymerization step with tertiary amino monomer units from the second step, along with (meth)allyl sulfonate. This composite structure integrates the paper-strengthening capabilities of (meth)acrylamide with the functional properties of tertiary amino groups, achieving both harm reduction and property retention.

Inventive Principle:

Principle #40Composite materials

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The method effectively reduces the (meth)acrylamide content in paper products while retaining the necessary properties for papermaking, making the paper suitable for use in food packaging applications.

Implementation Method 1

a polymerization initiator (ammonium persulfate) is added thereto to be reacted, so that the paper strengthening agent is obtained as an aqueous solution of an amphoteric polyacrylamide

Methodology Applied

Scientific EffectPolymerization: Photopolymerisation

Implementation Method 2

a crosslinking agent (methylene bisacrylamide) is added thereto to be reacted

Methodology Applied

Scientific EffectCrosslinking: Chemical Bonding

Data Source

PatentEP3647492B1Method for producing (METH)acrylamide-based polymer papermaking additive and (METH)acrylamide-based polymer papermaking additive

Publication Date: 2022.10.19 HARIMA CHEM INC

AI summary

In a method for producing a (meth)acrylamide polymer papermaking additive obtaining a (meth)acrylamide polymer by obtaining a first polymer by polymerizing a first polymerization component containing a (meth)acrylamide and polymerizing a second polymerization component containing a tertiary amino monomer under the presence of the first polymer, the first polymerization component and/or the second polymerization component contain(s) a (meth)allyl sulfonate, a ratio of the tertiary amino monomer in the first polymerization component with respect to 100 mol of the (meth)acrylamide in the first polymerization component is 0.1 mol or less, and a ratio of the (meth)acrylamide in the second polymerization component with respect to 100 mol of the tertiary amino monomer in the second polymerization component is 1.0 mol or less.