Amorphous Aluminum Silicate Antacid for Polyolefin Clarity
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Solution Overview
Problem
Current antacids used in polymer processing, such as calcium stearate and hydrotalcite, are costly and can cause issues like corrosivity, surface stickiness, and reduced clarity in polyolefin products, while existing alternatives like crystalline zeolites and zinc oxides may not fully address these problems effectively.
Innovation Solution
Incorporating amorphous aluminum silicates as an antacid in polymer compositions to neutralize acidic residues, which reduces corrosivity, improves color stability, and enhances clarity by maintaining a low Corrosivity Index and refractive index similarity with the polymer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If calcium stearate is used as an antacid agent, then acidic residues are neutralized, but the polymer surface becomes sticky or greasy and water carry over occurs
Solution Approach 1:
The patent changes the chemical composition parameters by replacing calcium stearate with amorphous aluminum silicate, which has different neutralization properties. This parameter change eliminates surface stickiness and water carry over while maintaining acid neutralization effectiveness, as demonstrated by the improved surface properties and reduced water carry over in the polymer products
Solution Approach 2:
The patent employs amorphous aluminum silicate as a cost-effective antacid alternative to calcium stearate. This material provides the necessary acid neutralization function without the adverse effects, offering an economical solution that improves surface properties and reduces water carry over in polymer processing
2Object-affected harmful factors
If hydrotalcite is used as an antacid, then acidic residues are neutralized, but the film clarity is reduced and haze increases
Solution Approach 1:
The patent changes the optical parameters by introducing amorphous aluminum silicate with specific refractive index properties. This material has a refractive index closer to the polymer matrix, reducing light scattering and haze while maintaining effective acid neutralization, thereby improving film clarity and transparency
Solution Approach 2:
The patent creates a composite system by incorporating amorphous aluminum silicate into the polymer matrix. This composite approach combines the acid-neutralizing properties of the silicate with the optical compatibility required for clear films, achieving both corrosion protection and improved transparency
3Object-affected harmful factors
If conventional antacids are used, then acid neutralization is achieved, but manufacturing cost increases
Solution Approach 1:
The patent substitutes expensive conventional antacids like calcium stearate and hydrotalcite with amorphous aluminum silicate, which is more cost-effective. This replacement reduces raw material costs while maintaining the essential acid neutralization function, improving the overall manufacturing economics
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 use of amorphous aluminum silicates in polyolefin polymers results in reduced corrosivity, improved color stability, and increased clarity, with a Corrosivity Index of less than 6 and clarity of at least 60%, effectively addressing the limitations of existing antacids.
Implementation Method 1
an amorphous aluminum silicate as an antacid minimizes the adverse effects of acidic residues formed during polymer processing
Data Source
AI summary
The present invention provides polymer compositions having improved corrosivity, color stability and clarity. Also disclosed is a process of preparing the polymers. The process may comprise incorporating into the polymer an acid neutralizing amount of an amorphous aluminum silicate. The amorphous aluminum silicate may be present in the polymer in an amount such that the polymer composition having a Corrosivity Index of less than 6. A refractive index of the amorphous aluminum silicate may be the same or substantially the same as a refractive index of the polymer.