Bisphenol A SMC mold pressing resin composition and preparation method thereof
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A resin composition and molding technology, which is applied in the field of SMC molding, can solve the problems of supply, resin manufacturers have no models, and cannot make strong acid and alkali resistant and high temperature molded products, etc.
Pending Publication Date: 2021-04-30
河北铭特环保设备科技有限公司
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Problems solved by technology
In practical applications, SMC FRP products can meet the requirements of ordinary mild acid and alkali corrosion resistance, but cannot be made into strong acid and alkali resistant and high temperature molded products. However, in chemical, pharmaceutical and
Method used
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Embodiment 1
[0024] According to parts by weight, weigh the raw material components, including 20.7 parts of bisphenol A type 3301 resin, 6.6 parts of low shrinkage unsaturated polyester resin, 0.34 parts of tert-butyl perbenzoate, 0.94 parts of zinc stearate, 0.018 parts of oil ester Parts, 34.22 parts of filler (calcium carbonate powder particle size is 600 mesh), 36.96 parts of fiber (2400 non-alkali roving), 0.22 part of magnesium oxide, 0.002 part of cobalt naphthenate;
[0025] Add bisphenol A type 3301 resin, low-shrinkage unsaturated polyester resin, and tert-butyl perbenzoate in sequence in the stirrer, and stir at a stirring speed of 500r / min for 2 minutes;
[0026] Add oil and stir for 3 minutes;
[0027] Add zinc stearate, stirring time is 2 minutes;
[0028] Add 10% of the filler, stir for 1 minute, add cobalt naphthenate and stir, increase the stirring speed to 600r / min, and stir for 1 minute;
[0029] Add color paste and stir for 2 minutes;
[0030] Add the remaining fill...
Embodiment 2
[0034] Different from Example 1, 18.6 parts of bisphenol A type 3301 resin, 5.3 parts of low shrinkage unsaturated polyester resin, 0.48 parts of tert-butyl perbenzoate, 1.5 parts of zinc stearate, 0.009 parts of oil ester, 26.5 parts of filler parts (aluminum hydroxide particle size is 400 mesh), 27.8 parts of fibers, 0.15 parts of magnesium oxide, 0.0026 parts of cobalt naphthenate;
Embodiment 3
[0036] Different from Example 1, 22.7 parts of bisphenol A type 3301 resin, 7.3 parts of low shrinkage unsaturated polyester resin, 0.2 parts of tert-butyl perbenzoate, 0.6 parts of zinc stearate, 0.022 parts of oil ester, 37.9 parts of filler parts (calcium carbonate powder particle size is 800 mesh), fiber 46.5 parts, magnesium oxide 0.27 parts, cobalt naphthenate 0.0014 parts;
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Abstract
The invention belongs to the technical field of SMC mold pressing, and particularly relates to a bisphenol A type SMC mold pressing resin composition. The composition comprises a bisphenol A type polyester resin, a low-shrinkage additive, a curing agent, a demolding agent, a filler, fibers and a stripping agent, wherein the bisphenol A polyester resin is 18 to 23 parts by weight, the low-shrinkage additive comprises 5-8 parts of a low-shrinkage resin, the curing agent comprises 0.2 to 0.5 part of tert-butyl peroxybenzoate, the demolding agent is prepared from 0.5 to 1.5 parts of zinc stearate and 0.005 to 0.035 part of grease, the filler is 20-40 parts, the fibers are 25-55 parts, and the stripping agent comprises 0.1-0.3 part of magnesium oxide. According to the invention, the novel resin composition is formed by taking common hand lay-up bisphenol A resin as a matrix and adding other components, during SMC mould pressing, the novel resin composition is uniform in curing, smooth in demolding and regular in forming, and the product of the novel resin composition has the characteristics of strong acid and alkali corrosion resistance, high mechanical strength, high temperature resistance and flame retardance.
Description
technical field [0001] The invention belongs to the technical field of SMC molding, and in particular relates to a bisphenol A type SMC molding resin composition. Background technique [0002] SMC, that is, sheet molding compound, is a type of sheet molding compound made of resin paste impregnated fiber or chopped fiber mat, covered with polyethylene film on both sides. It is one of the most widely used molding materials in the world at present. SMC molding resin paste is generally used for molding special unsaturated polyester resin, thickener, initiator, crosslinking agent, low shrinkage additive, filler, internal mold release agent and coloring The resin paste is impregnated with chopped fiber roving or glass fiber mat, which can be directly used in the SMC molding process. [0003] Since the above-mentioned resin compositions are mostly prefabricated specific raw materials, molding processing enterprises need to purchase them separately, and cannot improve the component...
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
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Application Information
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