Strippable Floor Coating Resolving Adhesion Durability Trade-off
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing strippable coating compositions for floors face challenges with stripping efficiency, tear spreadability, anti-dirt adhesion, water resistance, and dryness, particularly requiring multiple applications and being difficult to remove as a single continuous film due to high adhesion to floor surfaces.
Innovation Solution
A strippable coating composition containing 50% or more aqueous polyurethane resin, specifically formulated with a hydroxyl-containing compound component comprising polyester polyol, low-molecular alicyclic diol, and unsaturated fatty acid ester polyol, providing a coating film with tear strength of 0.3N or more, break strength of 10 MPa or more, and elongation at break of 50% or more, along with optional acrylic resin and release improver for enhanced properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the coating film adhesion to floor surface is increased to improve durability and anti-dirt adhesion, then the coating maintains aesthetic appearance longer, but the coating becomes difficult to remove as a single continuous film requiring multiple stripping operations
Solution Approach 1:
The patent introduces a specific hydroxyl-containing compound (polyester polyol with molecular weight 500-2000) as a mediator in the coating formulation. This compound acts as an intermediary that modulates the adhesion characteristics: it provides sufficient bonding to the floor surface for durability during use, while maintaining controlled debonding properties that enable the entire coating to be stripped as a single continuous film when removal is desired, eliminating the need for multiple stripping operations
Solution Approach 2:
The patent applies parameter changes by precisely controlling the molecular weight range (500-2000) and chemical structure of the polyester polyol component, and by setting specific content ratios (5-50 mass%) of the hydroxyl-containing compound in the total coating formulation. These parameter optimizations create a coating with balanced adhesion characteristics that achieves both durability during service and ease of removal when needed
2Reliability
If the coating composition uses conventional resin waxes to improve durability and reduce polishing requirements, then gloss persistence and dirt adhesion resistance improve, but the coating requires complex release agents and multiple repair operations for removal
Solution Approach 1:
The patent extracts and eliminates the need for complex release agents by using a specially formulated hydroxyl-containing compound system that provides inherent controlled adhesion. The coating can be removed by simple heating and scraping without requiring glycol-based solvents, chelating agents, or other complex chemical additives, thereby simplifying the stripping process while maintaining durability during service
Solution Approach 2:
The patent creates a composite coating formulation combining aqueous polyurethane resin with specifically selected polyester polyol and other hydroxyl-containing compounds. This composite material system achieves both the durability characteristics of conventional resin waxes and the simplified removal properties, eliminating the need for multi-component release agent systems
3Reliability
If the coating film is made thick to improve durability and coverage, then the aesthetic appearance and protection are enhanced, but the coating becomes difficult to remove completely in a single operation requiring multiple repair work
Solution Approach 1:
The polyester polyol acts as an intermediary that enables uniform adhesion throughout the coating thickness. Even when applied as thick coatings for enhanced durability and coverage, the entire coating film can be stripped as a single continuous layer because the adhesion characteristics are consistently controlled through the hydroxyl-containing compound, preventing partial bonding that would require multiple stripping operations
4Ease of operation
If conventional strippable coatings are formulated to be easily removable, then stripping work efficiency improves, but the coating durability and anti-dirt adhesion properties deteriorate
Solution Approach 1:
The patent optimizes parameter changes by controlling the molecular weight (500-2000) and chemical structure of the polyester polyol, and by setting the content ratio (5-50 mass%) of hydroxyl-containing compounds. These precise parameter adjustments create a coating that achieves both high durability and anti-dirt adhesion during service, while maintaining the ability to be stripped efficiently as a single continuous film when removal is desired
Data Source
AI summary
A strippable coating composition for floors which contains at least 50% by weight of an aqueous polyurethane resin relative to the total solid content, wherein the hydroxyl-containing compound component constituting the aqueous polyurethane resin comprises (A) a polyester polyol component prepared from 1,6-hexanediol and either an aliphatic dibasic acid and/or an aromatic dibasic acid, (B) a low-molecular alicyclic diol component, and (C) an unsaturated fatty acid ester polyol. The strippable coating composition can form a coating film that has a tear strength of 0.3N or more, a break strength of 10 MPa or more, and an elongation at break of 50% or more.