Preparation method of thermocuring polyurethane pressure-sensitive adhesive
The invention discloses a preparation method of a thermocuring polyurethane pressure-sensitive adhesive, which comprises the following steps: reacting isocyanate, polyol and a chain extender to generate a prepolymer, adding a sealing agent to obtain a sealed prepolymer, and heating and pressing to c...
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| creator | ZHANG ZHIYONG ZHAO YIDUO PENG YANWEN LIU YUNCHANG |
| description | The invention discloses a preparation method of a thermocuring polyurethane pressure-sensitive adhesive, which comprises the following steps: reacting isocyanate, polyol and a chain extender to generate a prepolymer, adding a sealing agent to obtain a sealed prepolymer, and heating and pressing to cure with the polyol, and specifically comprises the following steps: S1, under the protection of nitrogen, adding a catalyst to obtain a prepolymer; the preparation method comprises the following steps: adding 50-70 parts by weight of polyol, 3-6 parts by weight of a chain extender and 15-25 parts by weight of isocyanate into a reaction kettle, carrying out reduced pressure distillation dehydration at 80-85 DEG C for 40-60 minutes, cooling to 50-60 DEG C, and reacting for 3-5 hours to obtain a PU prepolymer; s2, reducing the temperature in the step S1 to 38-45 DEG C, adding a sealing agent, stirring, and reacting for 25-35 minutes to obtain a sealed PU prepolymer; and S3, mixing the product obtained in S2 with poly |
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the preparation method comprises the following steps: adding 50-70 parts by weight of polyol, 3-6 parts by weight of a chain extender and 15-25 parts by weight of isocyanate into a reaction kettle, carrying out reduced pressure distillation dehydration at 80-85 DEG C for 40-60 minutes, cooling to 50-60 DEG C, and reacting for 3-5 hours to obtain a PU prepolymer; s2, reducing the temperature in the step S1 to 38-45 DEG C, adding a sealing agent, stirring, and reacting for 25-35 minutes to obtain a sealed PU prepolymer; and S3, mixing the product obtained in S2 with poly</description><language>chi ; eng</language><subject>ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE ; ADHESIVES ; CHEMISTRY ; COMPOSITIONS BASED THEREON ; DYES ; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS ; METALLURGY ; MISCELLANEOUS APPLICATIONS OF MATERIALS ; MISCELLANEOUS COMPOSITIONS ; NATURAL RESINS ; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL ; 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| subjects | ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE ADHESIVES CHEMISTRY COMPOSITIONS BASED THEREON DYES MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL ORGANIC MACROMOLECULAR COMPOUNDS PAINTS POLISHES THEIR PREPARATION OR CHEMICAL WORKING-UP USE OF MATERIALS AS ADHESIVES |
| title | Preparation method of thermocuring polyurethane pressure-sensitive adhesive |
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