Waterborne Coating Polymer Resists Water Blushing
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Solution Overview
Problem
Waterborne coatings exhibit poor resistance to early water blushing and common household chemicals, such as gasoline and motor oil, which is a challenge for applications like masonry structures that require durability and chemical resistance.
Innovation Solution
The use of a polymer composition combining carbonyl functional monomers and phosphorous containing monomers, along with a crosslinking agent and phosphate surfactants, enhances chemical resistance and prevents early water blushing in waterborne coatings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If waterborne coatings are exposed to water environments, then the coating is subjected to prolonged water exposure, but the coating tends to blush or whiten when exposed to water
Solution Approach 1:
The patent modifies the chemical composition parameters of the coating by incorporating specific polymers with carbonyl groups and crosslinking agents, changing the molecular structure to resist water-induced blushing while maintaining waterborne formulation properties
Solution Approach 2:
The patent creates a composite coating system combining multiple polymer components including carbonyl-containing polymers, crosslinking agents, and optional surfactants to achieve both water resistance and blushing prevention properties
2Reliability
If conventional waterborne coatings are used, then the coating is easy to apply, but the coating offers poor resistance to chemicals such as gasoline, motor oil, brake fluid, and household cleaners
Solution Approach 1:
The patent changes the chemical resistance parameters by incorporating polymers with specific functional groups (carbonyl, hydroxyl, carboxyl) and crosslinking density to resist degradation from household chemicals while maintaining formulation feasibility
Solution Approach 2:
The patent uses crosslinking agents as intermediary substances that form bridges between polymer chains, creating a more resistant network structure that protects against chemical penetration and degradation
3Reliability
If early water blushing resistance is improved through polymer composition, then the coating resists water whitening after two to four hours dry time, but the coating requires specific polymer formulations not taught in prior arts
Solution Approach 1:
The patent optimizes the molecular weight, functional group content, and crosslinking density parameters of the polymer composition to achieve early water blushing resistance within 2-4 hours dry time, balancing performance with formulation complexity
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 polymer composition provides excellent early water blushing resistance and chemical resistance to common household substances, ensuring durability on masonry and concrete surfaces.
Implementation Method 1
The coating is exposed to water for prolonged periods of time in some applications. However, waterborne coatings especially clear aqueous coatings, tend to blush or whiten when exposed to water.
Implementation Method 2
Some prior arts had addressed this issue by using self-crosslinking approaches. U.S. Patent 4,267,091 disclosed the use of carbonyl groups containing monomers, water voluble aliphatic dihydrazide and metal salts such as zinc salt to improve water whitening (blushing).
Implementation Method 3
U.S. Patent 4,267,091 disclosed the use of carbonyl groups containing monomers, water voluble aliphatic dihydrazide and metal salts such as zinc salt to improve water whitening (blushing).
Implementation Method 4
Waterborne coatings also frequently offer poor resistance to chemicals that are commonly used in homes and offices, such as gasoline, motor oil, brake fluid, transmission fluid, household cleaners, window cleaning fluids, antifreeze, and the like.
Data Source
AI summary
This invention relates to waterborne coatings with enhanced early water blushing resistance, chemical resistance, and adhesion to substrates. These waterborne coatings can be paints, varnishes, and water sealers that offer excellent early water blushing as well as excellent resistance to common household chemicals, such as gasoline, motor oil, brake fluid, transmission fluid, household cleaners, window cleaning fluids, antifreeze, and the like.