A kind of odorless natural rubber and its preparation method and a kind of sizing material
A technology for natural rubber latex and natural rubber, applied in the field of natural rubber, can solve the problem of not considering the odor of natural rubber, and achieve the effects of high deodorization efficiency, low heat generation performance and simple preparation method
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[0028] The invention provides the preparation method of the odorless natural rubber described in the above technical scheme, comprising the following steps:
[0029] Carrying out cross-linking reaction of zeolite molecular sieve, surfactant and coupling agent in aqueous phase system to obtain zeolite molecular sieve dispersion modified by coupling agent;
[0030] mixing the zeolite molecular sieve dispersion modified by the coupling agent with natural rubber latex, coagulating and creping the resulting mixture in sequence to obtain a film;
[0031] After the film is granulated, it is soaked in a deodorant to obtain the odorless natural rubber.
[0032] In the invention, the zeolite molecular sieve, the surfactant and the coupling agent are subjected to crosslinking reaction in an aqueous phase system to obtain the zeolite molecular sieve dispersion modified by the coupling agent. In the present invention, the temperature of the cross-linking reaction is 30-80°C, more preferab...
Embodiment 1
[0047] In parts by weight, add 0.1 part of 3A molecular sieve to 20 parts of deionized water, control the ultrasonic power to 500W, and add 0.05 part of sodium dodecylsulfonate and 0.01 part of silane coupling in the state of ultrasonic dispersion Agent KH550, placed in a water bath at 30°C and continuously stirred for 0.2h, controlled at a stirring rate of 200r / min, to prepare a 3A molecular sieve dispersion modified by a silane coupling agent, and set aside;
[0048] Add the 3A molecular sieve dispersion modified by the silane coupling agent obtained above into 100 parts of natural rubber latex (calculated as dry rubber), stir for 0.1h, and then use formic acid coagulation to coagulate, dry, and crepe the natural rubber latex to obtain Film, dry the film under natural conditions for 1 day, granulate, soak in 20 parts of sodium hypochlorite for 2 hours, and dry at 90°C for 2 hours in a hot air drying oven to obtain odorless natural rubber.
[0049] The odorless natural rubber...
Embodiment 2
[0054] In parts by weight, add 10 parts of 4A molecular sieve to 25 parts of deionized water, control the ultrasonic power to 800W, and add 0.25 parts of sodium lignosulfonate and 4 parts of silane coupling agent KH560 in the state of ultrasonic dispersion , placed in a water bath at 80°C and continuously stirred for 1 hour, and controlled at a stirring rate of 400 r / min, to obtain a 4A molecular sieve dispersion modified by a silane coupling agent, and set aside;
[0055] Add the 4A molecular sieve dispersion modified by the silane coupling agent obtained above into 100 parts of natural rubber latex (calculated as dry rubber), stir for 4 hours, then use acetic acid coagulation method to coagulate, dry, and crepe the natural rubber latex to obtain a film , the film was dried under natural conditions for 30 days, granulated, soaked in 0.1 part of formaldehyde for 50 hours, and dried in a hot air oven at 40°C for 48 hours to obtain odorless natural rubber.
[0056] According to ...
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Abstract
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