Flexible Polymer Electrophoretic Coating for Garden Shears
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Solution Overview
Problem
Existing garden shears with Teflon paint suffer from abrasion and peeling, leading to a decline in anti-rust performance, which does not meet user requirements.
Innovation Solution
A flexible polymer electrophoretic coating is applied through electrophoretic painting, comprising an emulsion and color paste with specific raw materials, including epoxy resin, ethanolamine, propylene glycol methyl ether acetate, propylene glycol phenyl ether, lactic acid, and a colorant, which forms a durable anti-rust layer on the shears.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If Teflon paint is sprayed on the surface of garden shears, then the shears have anti-rust function, but the paint is prone to abrasion and peeling during frequent use
Solution Approach 1:
The patent changes the chemical composition parameters of the coating material from Teflon paint to a water-based epoxy resin emulsion containing specific additives (ethanolamine, propylene glycol methyl ether acetate, propylene glycol phenyl ether, lactic acid). This parameter change transforms the coating into a flexible polymer that maintains anti-rust properties while significantly improving abrasion resistance and adhesion to the metal surface.
Solution Approach 2:
The patent creates a composite coating system by combining epoxy resin as the base material with multiple functional additives (ethanolamine for crosslinking, propylene glycol derivatives for flexibility, lactic acid for adhesion promotion). This composite structure integrates the anti-rust function of epoxy resin with the flexibility and abrasion resistance provided by the additive system, resolving the contradiction between durability and flexibility.
2Reliability
If Teflon paint is applied to garden shears, then the shears have protective coating, but the coating peels off easily resulting in decline of anti-rust performance
Solution Approach 1:
The patent modifies the chemical parameters of the coating by using water-based epoxy resin emulsion with specific pH-adjusting agents (ethanolamine, lactic acid) and coupling agents (propylene glycol phenyl ether). These parameter changes ensure the coating maintains strong chemical bonding to the metal substrate, preventing peeling while preserving anti-rust performance throughout the service life.
Solution Approach 2:
The patent introduces lactic acid and propylene glycol phenyl ether as intermediary substances that enhance the chemical bonding between the epoxy resin coating and the metal surface. These intermediaries act as coupling agents that form strong bonds with both the substrate and the polymer matrix, ensuring stable adhesion and preventing coating delamination that would expose the metal to corrosion.
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 coating significantly enhances abrasion resistance and adhesion, preventing peeling and rust, thereby extending the service life and ensuring normal use of the garden shears.
Implementation Method 1
A flexible polymer electrophoretic coating and use thereof in the preparation of garden shears
Data Source
AI summary
Disclosed is a flexible polymer electrophoretic coating, including an emulsion and a color paste, where the emulsion includes the following raw materials in parts by weight: 20-40 parts of an epoxy resin; 1-5 parts of ethanolamine; 1-5 parts of propylene glycol methyl ether acetate; 0.1-1 parts of propylene glycol phenyl ether; 2-3 parts of lactic acid; and 50-70 parts of water; the color paste includes the following raw materials in parts by weight: 5-10 parts of an epoxy resin; 0.1-1 parts of ethanolamine; 1-3 parts of propylene glycol methyl ether acetate; 0.05-0.3 parts of propylene glycol phenyl ether; 0.5-2 parts of lactic acid; and 0.1-1 parts of a colorant; and a weight ratio of the emulsion to the color paste is (1-2):1. The flexible polymer electrophoretic coating can effectively improve the abrasion resistance of the surface of the garden shears and reduces the occurrence of peeling off.