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Reactivity high-branching vinyl polymer and preparation method

A vinyl compound and branched ethylene technology, applied in the field of reactive hyperbranched polymers and their preparation, can solve the problems such as the inability to directly use vinyl compounds, and achieve the effects of wide optional range and various combinations.

Active Publication Date: 2008-09-10
CHENGDU BYSUN HI TECH MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method requires special compounds with both (meth)acryloyl and vinyl ether groups, and ready-made vinyl compounds cannot be used directly

Method used

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  • Reactivity high-branching vinyl polymer and preparation method
  • Reactivity high-branching vinyl polymer and preparation method
  • Reactivity high-branching vinyl polymer and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1: emulsion polymerization (E)

[0027] 5 grams of emulsifier sodium dodecylbenzenesulfonate, monofunctional compound MMA 100g (1mol), polyfunctional compound HDDA 2.3g, (0.01mmol), polythiol MES 1.54g (0.01mmol) and 100ml deionized water Add it into the reactor, stir and pre-emulsify for about 30 minutes under nitrogen gas, add 4 g of potassium persulfate initiator, move the reactor into a heating water bath, keep stirring, and react at about 68 ° C for about 3 hours with nitrogen gas to stop. The product is demulsified by freezing, and the separated product is dissolved in an organic solvent and precipitated with heptane at low temperature. The dissolution-precipitation was repeated three times, and the solvent was removed in a vacuum oven at about 45°C to obtain a purified reactive hyperbranched vinyl polymer. Its chemical structure is shown in the No. 1 embodiment in the attached table 1.

Embodiment 2

[0028] Example 2: Solution Polymerization (Sol)

[0029] Add 104g of monofunctional compound St, 50g of polyfunctional compound PUA, 46gh of polythiol MES and 2g of initiator AIBN into the reactor, and then add 150ml of solvent toluene; pass in nitrogen, raise the temperature to about 70°C, and stir for about 4 hours ; The polymer solution was precipitated with heptane at low temperature. The dissolution-precipitation was repeated three times, and the solvent was removed in a vacuum oven at about 40°C to obtain a purified reactive hyperbranched vinyl polymer. Its chemical structure is shown in the No. 8 embodiment in the attached table 1.

[0030] Embodiment 3 suspension polymerization (Susp)

[0031] Add 0.2g of polyvinyl alcohol, 6g of magnesium carbonate, 86g of monofunctional compound VAc, 23g of polyfunctional compound HDDA, 18g of polythiol BDT, 5g of initiator azobisisoheptanonitrile and 220ml of deionized water into the reactor, After stirring and pre-emulsifying fo...

Embodiment 4

[0032] Embodiment 4 bulk polymerization (Bulk)

[0033] Add 80g of monofunctional compound cyclohexene, 32g of polyfunctional compound DVB, 50g of polythiol PTTh and 0.2g of initiator azobisisobutyronitrile into the reactor, blow nitrogen gas, and stir the reaction at (60-75)°C hours. The product was dissolved in an organic solvent and precipitated with heptane at low temperature. The dissolution-precipitation was repeated three times, and the solvent was removed in a vacuum oven at about 35°C to obtain a purified reactive hyperbranched vinyl polymer. Its chemical structure is shown in Example 10 of Table 1.

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Abstract

The invention provides a reactive highly-branched vinyl polymer and a preparation method thereof. The molecular chain of the polymer comprises a hydrosulphonyl, a thioether bond and a carbon-carbon double bond, wherein the content of the hydrosulphonyl ranges between 0 mmol / g and 2.5 mmol / g; the mass content of elemental sulfur is 0.8 percent to 20 percent; the content of the carbon-carbon double bond ranges between 0 mmol / g and 2.5 mmol / g; moreover, the contents of the hydrosulphonyl and the carbon-carbon double bond are not equal to zero at the same time. The polymer is prepared by monofunctionality vinyl compound, polyfunctionality vinyl compound and polyfunctionality hydrosulphonyl compound with the molecular weight not more than 4,000 and at least containing two hydrosulphonyls through free radical copolymerization. The reactive highly-branched vinyl polymer, which can realize addition reaction and cross linking reaction under the condition of heating, oxidation, ultraviolet irradiation or high-energy radiation, can be widely used in fields such as coating material, adhesive, packaging material, casting, reactive extrusion and reactive injection molding, thereby having tremendous application value.

Description

Technical field: [0001] The invention relates to the technical field of polymer synthesis of polymer materials, and more specifically relates to a reactive hyperbranched polymer and a preparation method thereof. Background technique: [0002] Dendritic polymers have unique structures and properties, such as a large number of terminal functional groups, good solubility in organic solvents, and low viscosity. They are expected to be used in coatings, plastic processing, drug controlled release, special additives, etc. aspects are applied. However, the preparation of dendritic macromolecular polymers requires a step-by-step synthesis method. The preparation process is very cumbersome and the production cost is high, which limits its application. Hyperbranched polymers can be synthesized by "one-step reaction" or "quasi-one-step reaction". The preparation process is simple and the cost is significantly reduced. have many similarities. Therefore, hyperbranched polymers have gr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F2/38C08F220/14C08F222/14C08F212/08C08F290/06C08F218/08C08F232/04C08F212/36C08F222/20
Inventor 王跃川李朝龙
Owner CHENGDU BYSUN HI TECH MATERIALS
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