Recoat-able polishing-free unsaturated polyester resin for piano lacquer and preparation method of unsaturated polyester resin
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A polyester resin, piano paint technology, applied in the direction of coating, can solve the problems of difficult to meet the high hardness requirements of piano topcoat, low surface hardness of piano paint, grinding and polishing, etc., to achieve accelerated dual curing effect and solve surface hardness Low, good adhesion effect
Inactive Publication Date: 2015-12-30
QINGDAO ZHANCHEN NEW MATERIAL
View PDF3 Cites 7 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
[0003] Aiming at the above problems in the prior art of piano lacquer, the problem to be solved in the present invention is: the conventional unsaturated polyester resin is waxed to prevent oxygen, but the transparency is poor, it needs to be polished, and it cannot be recoated; The surface hardness of the piano paint configured with polyester resin is low, and it is difficult to meet the high hardness requirements of the piano paint
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0019] Add 327g maleic anhydride, 49g phthalic anhydride, 200g diethylene glycol, 34g neopentyl glycol, 0.5g Hypophosphorous acid, 0.2g hydroquinone, then start stirring and heating, heat up to 180-200°C, keep warm; continuously check the acid value, when the acid value drops to 120-130mgKOH / g, cool down to 120°C and add pentaerythritol triene Propyl ether 200g, heat up to 200±5°C evenly in 3 hours, keep warm until the viscosity and acid value pass, then cool down to below 120°C, add 300g of styrene to dilute, filter and discharge;
Embodiment 2
[0021] Add 300g maleic anhydride, 100g phthalic anhydride, 250g diethylene glycol, 0.7g hypophosphorous acid, 0.3g para Hydroquinone, then start stirring and heating, heat up to 180-200°C, keep warm; continuously check the acid value, when the acid value drops to 120-130mgKOH / g, cool down to 120°C and add trimethylolpropane diallyl Ether 250g, uniformly heated to 200±5°C in 3 hours, then kept warm until the viscosity and acid value passed, then cooled to below 120°C, added 300g of styrene to dilute, filtered and discharged;
Embodiment 3
[0023] Add 350g of maleic anhydride, 15g of phthalic anhydride, 180g of diethylene glycol, 54g of neopentyl glycol, and 0.6g of hypophosphorous acid in a 2000mL four-necked flask equipped with a stirring device, a thermometer and nitrogen protection in sequence , 0.3g hydroquinone, then start stirring and heating, heat up to 180-200°C, keep warm; continuously check the acid value, when the acid value drops to 120-130mgKOH / g, cool down to 120°C and add trimethylolpropane Diallyl ether 150g, pentaerythritol triallyl ether 150g, take 3 hours to evenly heat up to 200±5°C, keep warm until the viscosity and acid value are qualified, then cool down to below 120°C, add 300g of styrene to dilute, filter and discharge ;
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
PUM
Property
Measurement
Unit
acid value
aaaaa
aaaaa
Login to view more
Abstract
The invention discloses recoat-able polishing-free unsaturated polyester resin for piano lacquer and a preparation method of the unsaturated polyester resin. The unsaturated polyester resin comprises the following components in percentage by weight: 15 to 25 percent of an air-dry monomer, 25 to 35 percent of polyatomic acid, 20 to 30 percent of polyhydric alcohols, 20 to 30 percent of a solvent, 0.05 to 0.1 percent of an antioxidant and 0.01 to 0.05 percent of a polymerization inhibitor. The preparation method comprises the following steps: adding the polyatomic acid, the polyhydric alcohols, the solvent and the polymerization inhibitor into a reaction kettle in sequence, switching on stirring and heating at the same time, heating to 180 to 200 DEG C, and preserving the heat; continuously detecting an acidity value, cooling to 120 DEG C when the acidity value is reduced to 120 to 130mgKOH/g, then cooling to 120 DEG C and adding the air-dry monomer, uniformly heating to 200+/-5 DEG C by 3 hours, preserving the heat until the viscosity and the acidity value are qualified, then cooling and diluting the materials, performing filtration, and discharging a product. The piano lacquer prepared from the unsaturated polyester resin serving as a base material is high in surface hardness, and is higher in glossiness and transparency without polishing, construction period is short, the unsaturated polyester resin is recoat-able, convenient to prepare, and can be generally used in the bottom surface, and the production efficiency is greatly improved.
Description
technical field [0001] The invention belongs to the technical field of coatings, and specifically relates to an unsaturated polyester resin for recoatable polishing-free piano paint and a preparation method thereof. Background technique [0002] The coating film of the piano lacquer shell is often subject to external friction and collision, and is easy to scratch, so it needs higher hardness to resist. However, when the hardness is high, the brittleness of the paint film increases, and it is prone to cracking when it is bumped or the temperature changes. In order to solve this problem, the matching coating system of waxy unsaturated polyester topcoat and air-drying unsaturated polyester primer is often used in piano painting. This is because the wax-type topcoat uses conventional unsaturated polyester with high double bond content, high film hardness and brittle paint film; the air-drying unsaturated polyester primer uses air-drying unsaturated polyester with double bond co...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to view more