Amide Wax Processing Aid for Thermoplastics
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional processing aids for injection molding of plastics, such as fatty acid derivatives and metal soaps, often promote polymer degradation, are volatile, or exhibit excessive migration, failing to achieve an ideal balance between internal and external actions, particularly in engineering thermoplastics susceptible to hydrolysis.
Innovation Solution
A wax composition comprising a combination of three amide waxes: the reaction product of alkylenediamine with linear fatty acids, alkylenediamine with 12-hydroxystearic acid, and alkylenediamine with 12-hydroxystearic acid and linear fatty acids, which are specifically designed to provide optimized internal and external actions without inhibiting further treatment or causing migration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If fatty acid derivatives are used as processing aids, then internal action (rheological control, friction reduction) is improved, but polymer degradation is promoted and volatility increases at high processing temperatures
Solution Approach 1:
The invention changes the chemical parameters of the processing aid by using amide waxes (reaction products of long-chain carboxylic acids with mono- or polyfunctional amines) instead of fatty acid derivatives. This parameter change maintains the desired internal action while eliminating polymer degradation and volatility issues at high temperatures
Solution Approach 2:
The invention uses composite amide wax compositions containing multiple amide wax components with different chain lengths and structures. This composite approach optimizes both internal action and thermal stability, preventing polymer degradation while maintaining processing efficiency
2Ease of operation
If soaps are used as processing aids, then internal action is improved, but decomposition occurs in the presence of acidic constituents leading to volatility
Solution Approach 1:
The invention changes the chemical nature of the processing aid from soaps (metal salts of fatty acids) to amide waxes (reaction products of carboxylic acids with amines). This parameter change eliminates decomposition in the presence of acidic constituents while maintaining internal action benefits
3Ease of operation
If fatty acid esters are used as processing aids, then internal action in polar plastics is improved, but marked tendency toward migration is observed in nonpolar plastics
Solution Approach 1:
The invention uses amide waxes that exhibit universal compatibility with both polar and nonpolar plastics. The amide functional group provides polarity for internal action in polar plastics, while the long hydrocarbon chains provide compatibility with nonpolar plastics, eliminating migration tendencies across different plastic types
4Ease of operation
If amide waxes of stearic acid, erucic acid, or oleic acid are used as processing aids, then internal action is improved, but behavior is similar to fatty acid esters with excessive migration in nonpolar plastics
Solution Approach 1:
The invention uses composite amide wax compositions containing multiple amide wax components with varying chain lengths and structures. This composite approach optimizes the balance between internal action and migration resistance, improving upon individual amide waxes that show excessive migration in nonpolar plastics
Data Source
AI summary
A wax composition comprises at least three amide waxes A, B, and C, whereamide wax A is the reaction product of alkylenediamine with linear fatty acids or with mixtures composed of fatty acids,amide wax B is the reaction product of alkylenediamine with 12-hydroxystearic acid, andamide wax C is the reaction product of alkylenediamine with 12-hydroxystearic acid and with linear fatty acids.The wax composition is suitable as a processing aid in engineering thermoplastics or for the preparation of solvent-based wax pastes or the preparation of wax micronizates for coatings or for the preparation of aqueous dispersions.