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A polyester resin and unsaturated technology, applied in the field of unsaturated polyester resin for putty, can solve the problem of high cost, and achieve the effect of improving performance, improving various properties and reducing cost
Inactive Publication Date: 2011-11-30
CHANGZHOU VOCATIONAL INST OF ENG
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Abstract
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Problems solved by technology
However, the unsaturated polyester resins used in the putty products with a heat resistance temperature above 180°C on the market are all imported products, which are not only costly, but also controlled by the importer. Therefore, it is urgent to develop a domestically-made suitable Unsaturated polyester resin for putty with a heat resistance temperature above 180°C
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Embodiment 1
[0019] Embodiment 1 prepares unsaturated polyester resin for putty
[0020] Synthesized according to the following steps:
[0021] ① Prepare raw materials according to the following formula:
[0022] In terms of molar ratio, dicyclopentadiene: isophthalic acid: maleic anhydride: diethylene glycol is 0.3: 0.3: 1.0: 1.3;
[0023] ②In the reaction kettle, first add 0.3 mol of dicyclopentadiene, maleic anhydride (0.3 mol) equivalent to dicyclopentadiene and appropriate amount of water to heat up, and react at 90°C for 4 hours until the acid value is close to constant, at which point maleic anhydride hydrolyzes and forms a monoester with dicyclopentadiene;
[0024] ③In the reaction kettle, add 0.3 mole of isophthalic acid and 0.6 mole of diethylene glycol, and react with the monoester formed in step ②, in the presence of catalyst butyl titanate, at 200°C until the material until it becomes transparent;
[0025] ④ Cool down to 150°C, add remaining maleic anhydride (0.7 mol) and ...
Embodiment 2
[0027] Embodiment 2 prepares putty
[0028] Prepare raw materials according to the following formula: talcum powder (325 orders) 360g, talcum powder (600 orders) 150g; Titanium dioxide (rutile type) 10g; Fumed silica 6g; Unsaturated polyester resin (embodiment 1 system) 300g; Accelerator (cobalt naphthenate) 4.0g;
[0029] The above raw materials are mixed evenly, kneaded by a kneader, and ground by a three-roll mill to obtain the atomic ash.
[0030] The properties of the putty were tested according to relevant national standards, and the results are shown in Table 1.
[0031] Table 1
[0032] Test items
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Abstract
The invention relates to an unsaturated polyester resin for putty. The raw materials and consumption of synthetic resin are as follows: in terms of molar ratio, dicyclopentadiene: isophthalic acid: maleic anhydride: diethylene glycol is 0.30~0.5: 0.30~0.50: 1.0~1.2: 1.3~1.7; The order in which the raw materials are added to the reactor is: first add the formula amount of dicyclopentadiene, maleic anhydride and water equal to dicyclopentadiene, react to form a monoester, and then add the formula amount of isophthalic acid and Two times the amount of diethylene glycol in the formulation of isophthalic acid is reacted with the formed monoester, and finally the remaining maleic anhydride and the remaining diethylene glycol are added to continue the reaction until the unsaturated polyester resin is formed. The heat resistance of the putty prepared from the unsaturated polyester resin of the present invention is at least 200°C, reaching the level of the putty prepared with foreign unsaturated polyester resin, ensuring the quality, reducing the cost, and solving the dependence on foreign products sex.
Description
technical field [0001] The invention relates to an unsaturated polyester resin for putty, in particular to an unsaturated polyester resin for heat-resistant putty. Background technique [0002] The official name of putty is polymerized putty, that is, unsaturated polyester resin putty. Because of its unique advantages such as fast curing, easy grinding, less organic solvent emission, strong adhesion, and no cracking, it has become an ideal filling material with active research and rapid development at home and abroad. Widely used in automobile manufacturing, machinery, shipbuilding, locomotives, vehicle manufacturing, and repair industries. Putty is a compound product, which consists of two parts: main agent and curing agent. Agents (such as fumed silica, organic bentonite) are mixed and ground. The curing agent is composed of organic peroxides (such as cyclohexanone peroxide, methyl ethyl ketone peroxide, etc.), and pigments. Putty with excellent performance should have...
Claims
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Application Information
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