Two-Component Coating Composition Rapid Drying at 80°C

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Solution Overview

Problem

Existing two-component coating compositions do not achieve rapid drying and pendulum hardness development at temperatures up to 80°C with good chemical resistance.

Innovation Solution

A two-component coating composition comprising pentamethylene diisocyanate, hydroxy-functional poly(meth)acrylate polyol, a Lewis base as a urethanization catalyst, organic solvent, and optional additives and fillers, designed for use in a temperature range of up to 80°C.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Speed

If conventional two-component coating compositions are used, then chemical resistance is achieved, but rapid drying and pendulum hardness development at temperatures up to 80°C are not achieved

Engineering Contradiction:

Improvedrying speedVSAvoidchemical resistance

Core Design Contradiction:

SpeedVSReliability

Solution Approach 1:

The patent changes the chemical parameters of the coating system by using pentamethylene diisocyanate with specific molecular weight and functionality, combined with hydroxy-functional poly(meth)acrylate polyol and a Lewis base catalyst, to achieve rapid curing at elevated temperatures while maintaining chemical resistance

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent creates a composite coating system combining multiple components: pentamethylene diisocyanate, hydroxy-functional poly(meth)acrylate polyol, Lewis base catalyst, and organic solvent, where each component contributes specific properties to achieve both rapid drying and chemical resistance

Inventive Principle:

Principle #40Composite materials

2Strength

If conventional two-component coating compositions are used, then chemical resistance is achieved, but rapid pendulum hardness development at temperatures up to 80°C is not achieved

Engineering Contradiction:

Improvependulum hardnessVSAvoidchemical resistance

Core Design Contradiction:

StrengthVSReliability

Solution Approach 1:

The patent optimizes the molecular weight and hydroxyl number of the polyol component, along with the isocyanate index and catalyst concentration, to control the crosslinking density and achieve rapid hardness development while preserving chemical resistance

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent employs a Lewis base catalyst that dynamically accelerates the urethanization reaction at elevated temperatures, enabling rapid network formation and hardness development without compromising the final chemical resistance of the cured coating

Inventive Principle:

Principle #15Dynamics

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 composition exhibits rapid drying and enhanced pendulum hardness development with improved chemical resistance at elevated temperatures.

Implementation Method 1

containing at least one Lewis base as a urethanization catalyst

Methodology Applied

Scientific EffectCatalysis: Catalysis

Data Source

PatentEP3286273B1Two-component coating compounds

Publication Date: 2019.07.24 BASF SE

AI summary

The present invention relates to the use of two-component coating compounds which contain isocyanurates of pentamethylene diisocyanate and NCO group-reactive compounds, harden fast and have good chemical resistance at temperatures up to 80°C.