PVC Plastisol Plasticizer Composition for Cold Resistance and Non-Bleeding
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Solution Overview
Problem
Existing vinyl chloride resin plastisols suffer from insufficient cold resistance, plasticization properties, and compatibility issues, with phthalates and aromatic compounds exhibiting poor non-bleeding properties.
Innovation Solution
A plasticizer composition comprising specific amounts of aliphatic diester, aromatic diester, and phthalate, with mass ratios of 65:35 to 95:5 for aliphatic to aromatic diester and 5:95 to 35:65 for the combined diesters to phthalate, enhancing plasticization, cold resistance, and non-bleeding properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a phthalate and an aromatic compound having a long-chain alkyl group are added to a vinyl chloride resin plastisol, then the plasticization property is improved, but the cold resistance remains insufficient and bleeding occurs
Solution Approach 1:
The invention uses a composite plasticizer system consisting of three components: an aliphatic diester (A), an aromatic diester (B), and a phthalate (C). This composite approach combines the advantages of different plasticizer types to achieve both excellent plasticization properties and cold resistance, while preventing bleeding. The specific mass ratio ranges (A:B = 65:35 to 95:5 and (A+B):C = 5:95 to 35:65) optimize the synergistic effects of these components.
Solution Approach 2:
The invention changes the chemical composition parameters of the plasticizer system by introducing specific aliphatic diesters and aromatic diesters with defined carbon atom ranges. The aliphatic diester (A) uses an aliphatic dicarboxylic acid with 2-12 carbon atoms and an aliphatic monoalcohol with 4-18 carbon atoms, while the aromatic diester (B) uses an aromatic monocarboxylic acid with 6-12 carbon atoms and a glycol with 2-12 carbon atoms. These parameter specifications enable optimal balance between plasticization, cold resistance, and compatibility.
2Strength
If a phthalate and an aromatic compound having a long-chain alkyl group are added to a vinyl chloride resin plastisol, then the plasticization property is improved, but the compatibility between plasticizer and vinyl chloride resin is insufficient causing bleeding
Solution Approach 1:
The composite plasticizer system combines aliphatic diester (A), aromatic diester (B), and phthalate (C) in specific proportions to achieve both good plasticization and excellent compatibility with vinyl chloride resin. The aliphatic components provide compatibility through similar solubility parameters, while the aromatic components enhance plasticization, and the phthalate provides baseline performance. This composite approach prevents phase separation and bleeding.
Solution Approach 2:
Different components of the plasticizer mixture serve different local functions: the aliphatic diester (A) primarily provides compatibility and prevents bleeding, the aromatic diester (B) enhances plasticization and cold resistance, and the phthalate (C) provides baseline plasticization. This functional differentiation within the mixture allows each component to optimize its specific role while working synergistically.
Data Source
AI summary
A plasticizer composition for a vinyl chloride resin which can impart an excellent plasticization property and cold resistance to a vinyl chloride resin plastisol and is excellent in a non-bleeding property is provided. Specifically, a plasticizer composition for a vinyl chloride resin including an aliphatic diester (A) of an aliphatic dicarboxylic acid having 2 to 12 carbon atoms and an aliphatic monoalcohol having 4 to 18 carbon atoms, an aromatic diester (B) of an aromatic monocarboxylic acid having 6 to 12 carbon atoms and a glycol having 2 to 12 carbon atoms, and a phthalate (C), in which aliphatic diester (A) : aromatic diester (B) = 65:35 to 95:5 (mass ratio) is satisfied and (aliphatic diester (A) + aromatic diester (B)) : phthalate (C) = 5:95 to 35:65 (mass ratio) is satisfied.