Rubber/polyvinyl butyral mixed glue

Abstract

The invention discloses rubber / polyvinyl butyral mixed glue, and belongs to the technical field of rubber products. The mixed glue is prepared according to the following method: equally dividing 95 to 50 parts of rubber accounted in weight parts into two parts, and mixing the two parts of rubber at the temperature of 60 to 160 DEG C; after mixing, adding 5 to 50 parts of wasted polyvinyl butyral membranes and 0 to 20 parts of bulking agent into one part of rubber to continue mixing; and finally, adding the other part of rubber into the mixed rubber for alloying after mixing to obtain the rubber / polyvinyl butyral mixed glue. According to the invention, the mixed glue has a simple manufacturing process, and compared with the corresponding rubber products obtained through vulcanizing pure rubber, the vulcanized glue products obtained through vulcanizing the mixed glue are not lowered in comprehensive property, and in addition, the hardness and tearing strength of the rubber / polyvinyl butyral mixed glue products are improved remarkably. The mixed glue provided by the invention can effectively reduce the cost of rubber products, broaden the application scope of the wasted polyvinyl butyral membranes, and turn waste into wealth.

Description

technical field [0001] The invention relates to the technical field of rubber products, in particular to a rubber / polyvinyl butyral hybrid rubber with excellent performance, easy processing and low cost. Background technique [0002] Polyvinyl butyral is a resin formed by condensation of polyvinyl alcohol and n-butyraldehyde under the condition of strong acid as a catalyst. Because the condensation reaction is not complete, there is a certain amount of hydroxyl groups in the molecular chain of polyvinyl butyral; and because polyvinyl alcohol is obtained by hydrolysis of polyvinyl acetate, polyvinyl acetate cannot be hydrolyzed completely in the hydrolysis reaction, so There is a small amount of acetoxy groups; therefore, the macromolecular chain of polyvinyl butyral contains butyral groups, hydroxyl groups, and acetoxy terpolymers, but the content of acetoxy groups is usually very low (less than 2wt%). Polyvinyl butyral resin has many uses, and its most important applicatio...

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Problems solved by technology

However, the toughening of plastics with polyvinyl butyral films has the following problems: (1) The thermal stability of polyvinyl butyral films is not high, and thermal decomposition begins at 200 °C (A.K. Dhaliwal , J.N. Hay, The characterization of polyvinyl butyral by thermal analysis, Thermochimica Acta, 2002, 391: 245–255), and the processing temperature of plastics is usually higher, such as the processing temperature of polypropylene is about 230 ° C, used as engineering plastics The processing temperature of nylon is higher, that is, when polyvinyl butyral film is used to toughen most plastics, there is a problem that the processing temperature of the two does not match; (2) polyvinyl butyral film contains a large number of small molecular Plasticizer, in the process of blending with plastics and after the formation of blended materials, small molecule plasticizers are easy to migrate, especially for plastics that cannot contain plasticizers in products, polyvinyl butyral film does not Not applicable; (3) The polyvinyl butyral film increases the toughness of the plastic but reduces its rigidity, which is a common problem of elastomer toughened plastics (1.Cha Y J, Lee C H, Choe S, et al. Morphology and mechanical properties of nylon 6 toughened with waste Poly(vinyl butyral) film[J]. Journal of Applied Polymer Science, 1998, 67, 1531-1540; 2.Ticiane S V, Nicole R D. Polymer toughening using residue of recycled windshield : PVB film as impact modifier[J]. European Polymer Journal, 2008, 44, 755–768.)

Using rubber and waste polyvinyl butyral diaphragms together can obtain high-quality and low-cost rubber materials, but there is no relevant literature report at present

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