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Heat-setting resin based on unsaturated polyester resins and mirror back metal plating protecting coating thereof

A technology of polyester resin and protective coating, applied in the field of resin, can solve the problems of high cost of use, coating peeling off, high cost, etc., and achieve the effect of good chemical corrosion resistance, good corrosion resistance and fast drying speed

Inactive Publication Date: 2010-12-22
常州市弘可利办公用品有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Mirror back paint, such as the disclosed "coating of glass" of CN1122127A, adopts alkyd resin, amino resin and organosilicon adhesion promoter, although the coating obtained has improved aspect drying speed and hardness, but flexibility, Adhesion and durability are still not enough
Therefore, after the mirror is used for a period of time, the coating will still fall off, especially at the incision of the mirror, which will reduce the optical performance of the mirror.
On the other hand, the price of silicone is more expensive and the cost of use is higher
[0006] CN1371409A discloses "Quick-drying High Solid Content Coating Based on Modified Alkyd Resin", which is a composition of acrylic modified alkyd resin curing high solid at room temperature, which has good performance, but its coating structure is not dense enough , chemical substances are easy to penetrate, which affects the durability of the mirror back reflection layer
[0007] CN1621430A discloses " modified dry oil alkyd resin and curtain coating thereof for mirror back metal coating protective coating ", just can reach the requirement of drying at 180 ℃ for 5 minutes, and the import silver mirror production line drying temperature that my country uses in large quantities and The time is 3-5 minutes at 130°C-150°C, therefore, the coating still cannot meet the needs of downstream customers
[0008] CN1900189A discloses " a kind of preparation method of low-temperature baked glass silver mirror mirror back paint ", adopts tung linoleum to modify phenolic resin, this scheme can realize quick-drying, but anticorrosion property is far from reaching actual requirement
[0009] CN1793256 disclosed "Mirror Back Paint Resin and Its Curtain Coating" adopts polyurethane to realize performance, but the synthesis of polyurethane needs to use highly toxic toluene diisocyanate
[0010] CN1793257 discloses "mirror back paint resin and curtain coating thereof", uses a large amount of acrylic acid monomers and acrylic acid prepolymers to realize performance simultaneously, but the cost of raw material acrylonitrile and butyl acrylate used is higher, and this method needs pre-synthesis Acrylic prepolymers, which add to the complexity of the process
[0011] So far, there has been no report of using unsaturated polyester resin to prepare mirror back paint

Method used

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  • Heat-setting resin based on unsaturated polyester resins and mirror back metal plating protecting coating thereof
  • Heat-setting resin based on unsaturated polyester resins and mirror back metal plating protecting coating thereof
  • Heat-setting resin based on unsaturated polyester resins and mirror back metal plating protecting coating thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Synthesis of fast-drying resins based on unsaturated polyester resins:

[0034] The specific preparation process is as follows:

[0035](1) Synthesis of unsaturated polyester resin: Nitrogen or carbon dioxide is introduced into the reaction kettle, 1, 2 kilograms of propylene glycol are put into the saturated dibasic alcohol, heated, and then the dibasic acid fumaric acid is thrown into the kilogram, and the dibasic acid is heated. Start stirring after melting, and the total volume of each component fed shall not exceed 80% of the volume of the reactor. After adding each component, the reaction temperature rises to 190-200°C. If the temperature is too high, the resin will be discolored, and if the outlet temperature of the condenser is too high, the glycol will be lost. The reaction time is related to the feed ratio. Generally, the end point of the reaction is judged by measuring the acid value of the material. The acid value at the end point can be controlled at 30-45...

Embodiment 2

[0039] The fast-drying resin based on unsaturated polyester resin is prepared according to the preparation process described in Example 1, and the specific raw material ratio is shown in Table 1:

[0040] Table 1 Raw material ingredients (unit: kilogram):

[0041]

[0042]

Embodiment 4

[0044] The quick-drying resin based on unsaturated polyester resin that adopts embodiment 1 to make is that back mirror back metal coating protective coating of raw material system, concrete raw material ratio table 2:

[0045] Table 2 (primer)

[0046]

[0047]

[0048] The total weight of the prepared primer: 100 kg. Solid content 70±1%, viscosity: 150-250s (Tu-4 cups, 25°C).

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Abstract

The invention relates to a resin and a dope. A fast-dry resin based on an unsaturated polyester resin is obtained by using 25 to 60 percent by weight of the unsaturated polyester resin to carry out co polymerization with 35 to 70 percent by weight of single-functionality vinyl monomer under the existence of 1 to 5 percent by weight of a chain transfer agent, wherein, the material of unsaturated polyester resin is manufactured by the fasculation of dibasic acid and dihydric alcohol. The invention carries out modifying on the unsaturated polyester resin to form the hyper branched fast-dry resinbased on an unsaturated polyester resin; the molecule of the obtained fast-dry resin contains proper polyester chains and double linkages as well as a plurality of hydroxide radicals and carboxyl. The fast-dry resin has the excellent functions of fast drying speed, high rigidity, good flexibility, good corrosion resistance, good adhesive attraction and low viscidity, etc. During the process of heating and baking the hyper branched fast-dry resin together with a crosslinked resin, the hydroxide radicals and carboxyl in the resin can be crosslinked with the amido in the crosslinked resin to generate a complex netty macromolecule compound which is very suitable for the curtain-pouring dope of the paint at the back of a mirror.

Description

1. Technical field: [0001] The present invention relates to a kind of resin, especially unsaturated polyester resin, also relates to mirror back protective paint prepared therefrom. 2. Background technology: [0002] Unsaturated polyester resin is a linear polymer produced by polycondensation reaction of saturated dibasic acid and unsaturated diol, or unsaturated dibasic acid and saturated diol. Due to the large number of double bonds in the polymer chain, it can be used It has good low temperature curing process performance when used in coatings. Unsaturated polyacid resin coatings can be widely used in various fields: as a furniture paint, it can be coated on plywood, plastic, paper and other materials; it can also be used as a coating for chemical storage tanks and metal surfaces. The wood paint made of unsaturated polyester resin has excellent performance, improves the sag phenomenon of vertical surface coating, and has good appearance, high hardness and brightness unsa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F283/01C03C17/00C09D151/08C08F2/38G02B1/10G02B1/14
Inventor 包柏青周加祥何建生许继光庄玉珍
Owner 常州市弘可利办公用品有限公司