Oxygen Absorbing Agent for Resin Curing
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Solution Overview
Problem
Paints containing unsaturated polyester resins and acrylic esters as diluents face increased oxygen inhibition during curing, leading to slow curing and sticky surfaces, as traditional oxygen absorbing agents are insufficient in preventing this inhibition.
Innovation Solution
An oxygen absorbing agent comprising a compound with a chalcogen atom and a transition metal salt, specifically designed to enhance oxygen absorption, allowing for effective crosslinking and curing reactions, even with a small content, thereby overcoming the limitations of traditional agents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional oxygen absorbing agents (e.g., allyl glycidyl ether) are used, then the resin can undergo crosslinking reaction, but the oxygen absorbing ability is insufficient leading to slow curing and sticky surface
Solution Approach 1:
The patent combines compound (A) with specific functional groups and transition metal salt (B) to create a composite oxygen absorbing agent. This composite structure synergistically enhances oxygen absorption capacity and curing performance, resolving the insufficiency of traditional single-component oxygen absorbing agents.
Solution Approach 2:
The patent modifies the chemical parameters of the oxygen absorbing agent by introducing specific functional groups (carboxyl, hydroxyl, amine, or water-soluble polymerizable groups) and controlling the transition metal salt content (0.001-10% by mol). These parameter changes optimize both oxygen absorption ability and curing speed.
2Object-affected harmful factors
If acrylic ester is used as diluent, then environmental performance is improved, but oxygen inhibition is more liable to occur
Solution Approach 1:
The oxygen absorbing agent acts as an intermediary substance that intercepts oxygen molecules before they can inhibit the crosslinking reaction. The transition metal salt facilitates this by catalyzing oxygen consumption, protecting the acrylic ester diluent system from oxygen inhibition while maintaining its environmental benefits.
Solution Approach 2:
The patent converts the harmful effect of oxygen into a beneficial process by using the transition metal salt to catalyze oxygen consumption. The oxygen that would normally inhibit curing is instead utilized to drive the oxygen absorption reaction, eliminating the harmful inhibition effect.
3Reliability
If higher oxygen absorbing ability is achieved, then crosslinking reaction is sufficient, but traditional agents require larger content increasing cost
Solution Approach 1:
The patent optimizes the concentration parameter by introducing transition metal salt (B) at specific content (0.001-10% by mol based on compound A). This catalytic addition allows achieving high oxygen absorbing ability and sufficient crosslinking reaction at lower agent content, reducing cost while maintaining performance.
Solution Approach 2:
The patent replaces the mechanical approach of simply increasing agent content with a chemical catalytic mechanism. The transition metal salt provides a catalytic pathway that dramatically enhances oxygen absorption efficiency, allowing effective performance at much lower concentrations than traditional non-catalytic agents.
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 oxygen absorbing agent exhibits superior oxygen absorption capabilities, enabling efficient crosslinking and curing reactions, even in the presence of oxygen, and is cost-effective due to its high performance with a small content.
Implementation Method 1
a transition metal salt (B)
Implementation Method 2
the oxidation of the compound (A) by oxygen
Implementation Method 3
oxygen absorbing agent containing a compound (A)... a transition metal salt (B)
Implementation Method 4
allowing for effective crosslinking and curing reactions
Data Source
AI summary
An oxygen absorbing agent containing a compound (A) of formula (I):wherein X is a chalcogen atom, R1 and R2 are each any one of an alkyl group which optionally has a substituent, an alkenyl group which optionally has a substituent, an aryl group which optionally has a substituent, and an aralkyl group which optionally has a substituent, R3 and R4 are each any one of a hydrogen atom, an alkyl group which optionally has a substituent, an alkenyl group which optionally has a substituent, an aryl group which optionally has a substituent, and an aralkyl group which optionally has a substituent, and R5 is a polymerizable group; and a transition metal salt (B).