Magnesium Catalyst Bonding Structure for Polyester Resin Production
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Solution Overview
Problem
The use of certain titanium compounds as catalysts in polyester resin production leads to prolonged reaction times and resin coloration, necessitating the development of a catalyst that can promote polycondensation reactions while maintaining reaction efficiency and color quality.
Innovation Solution
A magnesium compound with a specific bonding structure, represented by the formula Mg—O—(C)a-Q, where 'a' is an integer from 1 to 4 and Q is a nitrogen or sulfur atom, is used as a catalyst to enhance the polycondensation reaction between alcohol and acid components, potentially combined with a titanium compound to further accelerate the process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a titanium compound is used as a catalyst, then safety is improved, but reaction time becomes extremely longer and resin becomes colored
Solution Approach 1:
The invention uses a composite catalyst system combining magnesium compound (A) with specific bonding structure Mg—O—(C)a-Q and titanium compound (B). This composite approach leverages the safety advantages of titanium compounds while the magnesium compound component accelerates the reaction, resolving the contradiction between safety and reaction time.
Solution Approach 2:
The invention changes the chemical structure parameters of the magnesium compound by specifying the bonding portion Mg—O—(C)a-Q where a is 1-4 and Q is nitrogen or sulfur atom. This structural parameter change enables the magnesium compound to effectively promote polycondensation reaction, shortening reaction time while maintaining the safety benefits of titanium compounds.
2Reliability
If a titanium compound is used as a catalyst, then safety is improved, but resin coloration worsens
Solution Approach 1:
The composite catalyst system combines magnesium compound (A) and titanium compound (B) where the magnesium compound promotes polycondensation reaction efficiently, preventing resin coloration while the titanium compound provides safety advantages. This composite approach resolves the contradiction between safety and color quality.
Solution Approach 2:
By specifying the bonding structure parameters of the magnesium compound (Mg—O—(C)a-Q with a=1-4 and Q=N or S), the invention optimizes the catalytic activity to promote polycondensation reaction without causing resin coloration, while maintaining the safety benefits of titanium compounds.
3Productivity
If magnesium compounds are used to shorten reaction time, then productivity is improved, but catalytic activity needs further improvement
Solution Approach 1:
The invention optimizes the bonding structure parameters of the magnesium compound by specifying Mg—O—(C)a-Q where a is 1-4 and Q is nitrogen or sulfur atom. This structural optimization enhances catalytic activity for polycondensation reaction, further improving productivity beyond conventional magnesium compounds.
Solution Approach 2:
The composite catalyst system combining optimized magnesium compound (A) with titanium compound (B) achieves synergistic effect, where the magnesium compound provides high catalytic activity for polycondensation reaction and the titanium compound enhances safety, together maximizing productivity and catalytic activity.
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 magnesium compound significantly shortens the production time of polyester resin, enhances catalytic activity, and maintains a high-quality color tone, with the combination with a titanium compound providing additional acceleration and stability.
Implementation Method 1
a magnesium compound (A), wherein the magnesium compound (A) has a bonding portion represented by formula (1)... the polycondensation reaction of the alcohol component and the acid component, which are raw materials of the polyester resin, is greatly promoted
Data Source
AI summary
A catalyst for preparing polyester resins from monobasic or polybasic acids and polyhydric alcohols, comprising a Magnesium compound which has a bonding portion represented by formula —Mg—O—(CR12)a-Q, wherein Q is a Nitrogen or Sulfur and a is an integer from 1 to 4, is disclosed. Catalyst may further comprise Titanium compounds, for example titanium alkoxide, wherein titanium diisopropoxy bistriethanolaminate is particularly preferable from the viewpoint of reactivity and coloring property. Catalyst is capable of shortening production time for polyester resins.