Polyhydroxy-diamine neutralizers for low VOC paints

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Solution Overview

Problem

Conventional neutralizing agents in paints are 100% volatile and contribute to high VOC levels, while alternatives like ammonia have strong odors and result in coatings with poor scratch and mar resistance, necessitating the need for low or no VOC and low odor neutralizing agents.

Innovation Solution

The use of polyhydroxy-diamine compounds of formula (I) as neutralizing agents in aqueous-based paints, which are effective at reducing VOC contributions and odor, allowing for higher pH formulations with reduced material usage and serving as dispersants for pigment particles.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Quantity of substance

If conventional neutralizing agents are used in paints, then neutralization efficiency is achieved, but VOC content increases to 100%

Engineering Contradiction:

ImproveVOC contentVSAvoidvolatile organic compound emissions

Core Design Contradiction:

Quantity of substanceVSObject-generated harmful factors

Solution Approach 1:

The patent changes the chemical structure parameter of neutralizing agents from conventional 100% volatile amines to polyhydroxy-diamine compounds with multiple hydroxyl groups, reducing VOC contribution to below 20% while maintaining neutralization efficiency through the amino group

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The invention uses composite molecular structures combining amino groups (for neutralization) and multiple hydroxyl groups (for low VOC and dispersant properties), creating a multi-functional neutralizing agent that addresses both neutralization efficiency and VOC reduction requirements

Inventive Principle:

Principle #40Composite materials

2Quantity of substance

If ammonia is used as neutralizing agent, then VOC content is reduced, but odor increases significantly

Engineering Contradiction:

ImproveVOC contentVSAvoidodor

Core Design Contradiction:

Quantity of substanceVSObject-affected harmful factors

Solution Approach 1:

The patent modifies the molecular structure by incorporating polyhydroxy-diamine compounds with specific alkyl groups (methyl, ethyl, propyl) that reduce vapor pressure and odor while maintaining the amino group's neutralization capability, achieving low VOC and low odor simultaneously

Inventive Principle:

Principle #35Parameter changes

3Quantity of substance

If inorganic bases are used as neutralizing agents, then VOC content is reduced, but scratch and mar resistance deteriorates

Engineering Contradiction:

ImproveVOC contentVSAvoidscratch and mar resistance

Core Design Contradiction:

Quantity of substanceVSStrength

Solution Approach 1:

The invention creates organic polyhydroxy-diamine compounds that combine the low VOC advantage of inorganic bases with the film-forming and protective properties of organic amines, maintaining scratch and mar resistance while achieving low VOC content

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The polyhydroxy-diamine compounds serve multiple functions: neutralizing agent, dispersant for pigment particles, and film-forming component that provides scratch and mar resistance, replacing the need for separate additives

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentEP2424924B1Tertiary aminoalcohols as low VOC additives for paints and coatings

Publication Date: 2014.04.23 ANGUS CHEM CO

AI summary

Provided are polyhydroxy-diamine compounds for use as neutralizing agents for paints and coatings. The compounds are of the formula (I) and salts thereof, wherein R1 and R2 are as defined herein.