Peelable Acrylic Resin Coating for Glass
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Solution Overview
Problem
Existing peelable coatings for silicate substrates like glass and ceramics face challenges in maintaining stable, easy-peeling performance, mechanical strength, and fast drying characteristics, despite previous attempts using components like wax, vinyl copolymers, and organic amine releasing agents.
Innovation Solution
A resin composition comprising a film-forming acrylic resin, a separating agent such as polypropylene glycol or glycerin fatty acid ester, and a solvent, along with optional additives like plasticizers and defoamers, is used to create a tough, peelable coating with excellent peeling performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional peelable coating components (wax, vinyl copolymer, organic amine releasing agents) are used, then the coating can be peeled after curing, but the coating film loses mechanical strength and stable peeling performance over time
Solution Approach 1:
The patent changes the chemical parameters of the coating composition by using acrylic resins with specific molecular weights (10,000-100,000) and specific functional groups, along with precise配比 of separating agents (0.1-40 parts per 100 parts resin), to achieve both mechanical strength and peeling performance simultaneously
Solution Approach 2:
The patent creates a composite coating system combining acrylic resin (providing mechanical strength), separating agent (providing peeling capability), and solvent (providing film formation), where each component contributes specific properties that together resolve the contradiction between strength and peeling
2Strength
If the coating film is made tough and durable, then mechanical strength is improved, but peeling performance deteriorates
Solution Approach 1:
The patent applies local quality by having different regions of the coating system serve different functions: the acrylic resin matrix provides overall mechanical strength and durability, while the separating agent concentrated at specific locations (0.1-40 parts per 100 parts resin) provides localized peeling capability where needed
Solution Approach 2:
The separating agent acts as an intermediary substance between the coating film and the substrate, with specific molecular structures (polypropylene glycol with MW 8000-20,000 or glycerin fatty acid ester) that enable controlled separation while maintaining film integrity
3Reliability
If the coating dries slowly to ensure proper film formation, then film quality is improved, but productivity decreases
Solution Approach 1:
The patent optimizes the solvent parameters by selecting specific types (propanol, butanol, diacetone alcohol, aromatic hydrocarbon, or glycol ether) and controlling the solvent-to-resin ratio (40-60 parts solvent per 100 parts resin), achieving balanced evaporation rates that ensure proper film formation while maintaining acceptable drying speed
Solution Approach 2:
The patent employs periodic action in the drying process through controlled solvent evaporation, where the coating progresses through staged drying (initial solvent loss, then slower completion) to ensure uniform film formation without excessive total drying time
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 resin composition achieves strong mechanical resistance, excellent peeling performance, and water resistance, addressing the limitations of prior coatings and enhancing the durability and applicability of the coating film.
Implementation Method 1
the separating agent, which is polypropylene glycol or glycerin fatty acid ester or their mixtures, defined to be 0.1-40 parts based on component (a)
Implementation Method 2
at least one solvent, defined to be 40-60 parts based on component (a)
Implementation Method 3
film-forming resin containing at least one acrylic resin, defined to be 100 parts
Data Source
AI summary
The present invention provides a resin composition used for peelable coating and compounding process thereof. The composition includes the following components: (a) 100 parts by weight of film-forming resin containing at least one acrylic resin; (b) 0.1-40 parts by weight of at least one separating agent, which is polypropylene glycol or glycerin fatty acid ester or their mixtures; and (c) 40-60 parts by weight of at least one solvent. The peelable coating formed from the resin composition has excellent water resistance and excellent peeling performance even under the condition of prolonging storage period.