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Application of low-ammonia or ammonia-free latex in domestic rubber gloves

A rubber gloves and household technology, applied in the field of rubber products, can solve problems such as restricting the sustainable development of the latex industry, and achieve the effects of improving elasticity and other properties, avoiding aging, and improving tensile strength.

Active Publication Date: 2019-07-26
RUBBER RES INST CHINESE ACADEMY OF TROPICAL AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Different additions will have adverse effects on the processing technology and performance of the product. Therefore, the traditional natural latex preservation technology has seriously restricted the sustainable development of the latex industry. Under the premise of the properties such as elongation, aging resistance and processing technology, the development of low-ammonia and ammonia-free storage technology for natural latex without TT and ZnO has become one of the key issues that need to be solved urgently in the latex product industry.

Method used

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  • Application of low-ammonia or ammonia-free latex in domestic rubber gloves
  • Application of low-ammonia or ammonia-free latex in domestic rubber gloves
  • Application of low-ammonia or ammonia-free latex in domestic rubber gloves

Examples

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preparation example Construction

[0053] In some embodiments, the nano calcium carbonate is modified nano calcium carbonate; preferably, the raw materials for preparing the modified nano calcium carbonate include nano calcium carbonate, vinyl silsesquioxane, and functionalized hyperbranched polyethylene Further preferably, the preparation method of the modified nano-calcium carbonate includes the following steps:

[0054] Add 10 parts by weight of nano calcium carbonate and 1-2 parts by weight of functionalized hyperbranched polyethylene into a high-speed mixer, stir and mix at 70°C for 45 minutes, then heat up to 210°C, and add (0.5~1.5 weight Parts) polyphosphoric acid solution of vinyl silsesquioxane (CAS: 69655-76-1, purchased from Suzhou Silicon New Material Co., Ltd.) and 0.004~0.008 parts by weight of initiator are added to the above mixed system, and the reaction is kept warm After 3 to 5 hours, the system is cooled to room temperature, poured into acetone solution, washed, filtered, and dried.

[0055] Pr...

Embodiment 1

[0078] Example 1 A household rubber glove is provided. The raw materials for preparation include natural rubber latex 100, casein 0.25, mixed dispersion 3, potassium hydroxide 0.8, surfactant 0.12, filler 7, and auxiliary agent 0.3 in parts by weight.

[0079] The filler is conventional calcium carbonate; the additive is a red pigment; the surfactant is a RO(CH 2 CH 2 O) n A polyether surfactant with H structure, where R is a C16 aliphatic carbon chain and n is 18; the natural rubber latex is a natural fresh rubber latex (harvested from rubber trees) after being preserved without ammonia, and then concentrated by centrifugation, The obtained concentrated natural rubber latex is obtained by HY method without ammonia storage. The specific process includes:

[0080] The bactericide and alkaline stabilizer in the preservation system are respectively formulated into 10wt% aqueous solution. The natural fresh latex is preliminarily added to the rubber bucket with a bactericide of 0.12wt% ...

Embodiment 2

[0086] Example 2 A household rubber glove is provided. The raw materials for preparation include natural rubber latex 100, casein 0.1, mixed dispersion 1, potassium hydroxide 0.1, surfactant 0.1, filler 2, and auxiliary agent 0.3 in parts by weight.

[0087] The filler is conventional calcium carbonate; the additive is a red pigment; the surfactant is a RO(CH 2 CH 2 O) n A polyether surfactant with H structure, where R is a C14 aliphatic carbon chain and n is 15; the natural rubber latex is a natural fresh rubber latex (harvested from rubber trees) after being preserved without ammonia, and then concentrated by centrifugation, The obtained concentrated natural rubber latex is obtained by BCT-2 method without ammonia storage. The specific process includes:

[0088] The bactericide and alkaline stabilizer in the preservation system are respectively formulated into 10wt% aqueous solution. The natural fresh latex is preliminarily added to the rubber bucket with a bactericide of 0.12wt%...

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Abstract

The invention relates to the field of rubber products, in particular to application of low-ammonia or ammonia-free latex in domestic rubber gloves. The invention also provides a domestic rubber glove.The domestic rubber glove is prepared by, by weight, 100 parts of natural raw latex, 0.1-1.0 part of casein, 0-1.5 parts of potassium hydroxide, 1-7 parts of mixed dispersion, 0.1-0.4 part of surfactant, 1-10 parts of filler and 0-3 parts of auxiliaries. The domestic rubber glove has the advantages that the domestic rubber glove is quite good in mechanical performance such as tensile strength, elongation at break, tear strength and stress at definite elongation and quite good in aging resistance, and the mechanical performance and aging resistance of the domestic rubber glove are much higherthan common natural rubber products; the main raw material of the domestic rubber glove is a natural rubber component which has performance such as oil resistance and heat resistance, migration of small-molecule compounds in the domestic glove materials during use can be avoided by the synergistic effect of various components, problems such as aging and blooming are avoided, and service life prolonging is achieved.

Description

Technical field [0001] The invention relates to the field of rubber products, in particular to the application of low-ammonia or non-ammonia latex in household rubber gloves. Background technique [0002] Natural rubber is an important strategic resource and industrial raw material, widely used in various fields such as industry, agriculture, national defense, transportation, medical and health. Since rubber gloves have a barrier protection function and can well protect the safety of users, they have been widely used in people's production and life. According to its different uses, it can be divided into medical gloves, industrial gloves and household gloves. Natural latex gloves are comfortable and soft, durable and practical, so they are widely loved by consumers. However, natural rubber latex is susceptible to corruption and deterioration due to the action of bacteria and enzymes, which affects the stability, processing performance and physical and mechanical properties of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L7/02C08L89/00C08K3/06C08K3/22C08K3/26C08K9/06C08K9/04A41D19/015
CPCA41D19/0055C08K2003/2296C08K2003/265C08K2201/011C08L7/02C08L89/005C08K3/06C08K3/22C08K3/26C08K9/06C08K9/08
Inventor 桂红星赵立广黄文正宋亚忠李建伟丁丽黄红海王岳坤
Owner RUBBER RES INST CHINESE ACADEMY OF TROPICAL AGRI SCI
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