Solid Tempera Composition Using Resin and Sodium Stearate
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Solution Overview
Problem
Existing solid tempera compositions for painting or drawing on substrates like paper and cardboard are excessively solidified during manufacturing, requiring substantial mechanical effort for application, leading to potential substrate damage and inadequate solidification.
Innovation Solution
A solid tempera composition using polyvinylacetal resin and sodium stearate, with specific concentration ranges, that can be directly applied without water, allowing easy dispersion and forming a high-covering, fast-drying film with low mechanical effort, achieved through a manufacturing method involving separate preparation and rapid mixing of components without stirring, followed by controlled cooling and solidification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If pigments and resins are mixed with stirring under hot conditions to obtain homogeneous mix, then homogeneity of the mixture is improved, but the tempera becomes excessively solidified requiring substantial mechanical effort for application
Solution Approach 1:
The mixture is divided into discrete particles rather than being fully homogenized. The patent specifies that the mixture should consist of pigment particles substantially uniformly distributed in the resin without complete homogenization, creating a segmented structure that maintains ease of application while achieving sufficient uniformity for consistent coloring.
Solution Approach 2:
The patent changes the mixing parameters by eliminating hot stirring conditions and instead using ambient temperature mixing without mechanical stirring. This parameter change prevents excessive solidification while still achieving adequate distribution of pigment particles in the resin matrix.
2Stability of the object's composition
If pigments and resins are mixed with stirring under hot conditions, then homogeneity is improved, but the solidifying agent solution becomes difficult to dissolve resulting in weak cross-linking
Solution Approach 1:
The solidifying agent is incorporated into the mixture before final assembly, allowing it to dissolve and cross-link properly. The patent specifies that the solidifying agent solution should be included in the mixture of pigment particles and resin, enabling preliminary dissolution and cross-linking action before the tempera is applied and dried.
Solution Approach 2:
The patent replaces mechanical stirring with a chemical mixing approach where components are combined and allowed to interact chemically. Instead of using mechanical energy to achieve homogeneity, the system relies on natural diffusion and chemical bonding processes to distribute the solidifying agent and create cross-links.
3Stability of the object's composition
If the tempera is made solid for stable conservation, then dimensional stability is improved, but substantial mechanical effort is required for dispersing on substrate
Solution Approach 1:
The patent optimizes the resin content to between 30-70% by weight and controls particle size to 0.1-2.0 mm, creating a parameter range where the tempera maintains sufficient solidity for stability while remaining soft enough for easy application with minimal mechanical effort.
Solution Approach 2:
The tempera is formulated as a composite material combining pigment particles, resin, and solidifying agent in specific proportions. This composite structure provides dimensional stability through the resin matrix while the particle morphology and composition allow easy dispersion on substrate without requiring excessive mechanical force.
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 solution results in a dimensionally stable, easily dispersible solid tempera with high covering capacity and color variability, similar to oil paints, that maintains stability during manufacturing and packaging, and requires minimal mechanical effort for application, enhancing application efficiency and substrate compatibility.
Implementation Method 1
Said resin must contribute the sufficient initial adhesion and binding capacity
Implementation Method 2
said solidifying agent, which will be used with a concentration between 10% and 20% of the final product, and more preferably between 12% and 15%
Implementation Method 3
forming a fast drying covering film
Data Source
Figure 1A~1B
AI summary
The present invention relates to a solid tempera and to the method for manufacturing the same, which includes a dispersion of resin having a concentration value of 10 % to 70 %, sodium stearate having a concentration of 10 % to 20 %, glycerine having a concentration value of 4 % to 20 %, water having a concentration of 7 % to 50 %, a pigment having a concentration value of 5 % to 15 %, an anti-foaming agent having a concentration of 1 % to 3 %, and a biocide having a concentration of 0.10 % to 0.4 %, the above concentration values relating to the final product. The tempera of the invention is used for painting or drawing on a substrate such as paper, Bristol board, wood or cardboard, being applied directly to said substrates without having to add water.