Polyvinylidene chloride (PVDC) copolymer latex for medicine packaging as well as preparation method and application thereof
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A technology for vinylidene chloride and packaging, which is applied in the field of polyvinylidene chloride copolymer latex for water-based pharmaceutical packaging and its preparation. It can solve the problems of high barrier property and no crystal point, and achieve high barrier property and low latex viscosity. , good softness
Active Publication Date: 2010-02-17
浙江科冠聚合物有限公司
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[0003] In order to solve the technical defects existing in the existing polyvinylidene chloride (PVDC) latex, the purpose of this invention is to provide a kind of polyvinylidene chlorid
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[0024] Example 1
[0025] (1) Kettle material:
[0026] Deionized water 40Kg Sodium dodecyl sulfonate 0.7Kg
[0038] ①Add 40Kg of deionized water, 0.7Kg of sodium dodecyl sulfonate, 0.01Kg of glacial acetic acid, 0.005Kg of ferrous chloride, and nano-SiO in the reactor 2 0.005Kg, 0.002Kg of tert-butyl hydroperoxide, vacuum in the reactor, replace with nitrogen, then vacuum, replace with nitrogen, and then vacuum;
[0039] ② Based on the weight of the mixed monomer as 100 parts, add 20 parts of the mixed monomer to the reactor, cool ...
Example Embodiment
[0048] Example 2
[0049] The kettle material and the initiator are the same as in Example 1, except that the composition of the mixed unit is:
[0050] Vinylidene chloride 50Kg Acrylonitrile 3Kg
[0051] 6Kg of n-butyl acrylate and 3Kg of acrylic acid.
[0052] The preparation method of Example 2 is the same as that of Example 1.
Example Embodiment
[0053] Example 3
[0054] The kettle material and the initiator are the same as in Example 1, except that the composition of the mixed unit is:
[0055] Vinylidene chloride 60Kg Acrylonitrile 2Kg
[0056] 6Kg of n-butyl acrylate and 1Kg of acrylic acid.
[0057] The preparation method of Example 2 is the same as that of Example 1.
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Abstract
The invention relates to latex for medicine packaging, in particular to polyvinylidene chloride (PVDC) copolymer latex for aqueous medicine packaging and a preparation method thereof. The polyvinylidene chloride (PVDC) copolymer latex for the medicine packaging is prepared by copolymerizing a mixed monomer, an emulsifier, an initiator, a pH modifier, an auxiliary agent and nanometer materials, wherein the polyvinylidene chloride (PVDC) copolymer latex comprises the following components by the total weight percent of the mixed monomer: 70-96 percent of vinylidene chloride, 3-25 percent of acrylate monomer and 2-5 percent of acrylonitrile; and the weight percentage of the emulsifier, the initiator, the pH modifier, the auxiliary agent and the nanometer materials is as follows respectively accounting for the total weight of the latex: 0.5-5 percent of unsaturated aliphatic acid, 0.5-2 percent of the emulsifier, 0.02-0.2 percent of the initiator, 0.005-0.02 percent of the pH modifier, 0.002-0.01 percent of the auxiliary agent and 0.003-0.02 percent of the nanometer materials. The polyvinylidene chloride (PVDC) copolymer latex for the medicine packaging has low latex viscosity, good softness, high barrier property and no crystallization point.
Description
technical field [0001] The invention relates to latex for medical packaging, in particular to a polyvinylidene chloride (PVDC) copolymerized latex for water-based medical packaging and a preparation method thereof. Background technique [0002] Polyvinylidene chloride (PVDC) copolymer latex is now widely used in food packaging. Polyvinylidene chloride (PVDC) is a non-toxic, tasteless, safe and reliable high-barrier material. , also has oil resistance, corrosion resistance, taste retention, excellent moisture resistance, mildew resistance, direct contact with food and other properties, and also has excellent printing performance, and its technology is relatively mature. However, when used in pharmaceutical packaging, when polyvinylidene chloride (PVDC) latex is coated and compounded on PVC, the flexibility of polyvinylidene chloride (PVDC) is not enough, especially when the composite material is blown into capsules, due to polyvinylidene chloride The flexibility of vinyliden...
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