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High chemical resistance borosilicate glass and purpose thereof

A technology with high chemical resistance boron and chemical boron, which is applied to the types of packaging items, special packaging items, medical containers, etc., can solve the problems of large investment, borosilicate glass cannot meet the requirements of pharmaceutical packaging, and strict process conditions

Inactive Publication Date: 2011-06-08
SHANDONG LINUO NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] With the rapid development of my country's pharmaceutical industry, the quality requirements for pharmaceutical packaging materials are getting higher and higher. The borosilicate glass at the beginning of corresponding development cannot meet the requirements of pharmaceutical packaging. The production equipment and methods commonly used in the world require strict process conditions and relatively high investment. Big

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0052] High chemical resistance borosilicate glass is prepared as follows:

[0053] 1. Calculate the weight of raw materials based on oxides by weight, weigh the raw materials and mix them uniformly, melt them at 1560 ° C, and then pour them into steel molds; each composition is listed in Table 1 below (based on oxides by weight % ), coefficient of thermal expansion α 20 / 300 [10 -6 K -1 ], conversion temperature Tg (°C), softening point E (°C), working temperature V (°C), density ρ (g / cm 3 )

[0054] 2. Determine the chemical resistance according to the following method:

[0055] Acid resistance test method: GB / T15728---1995 consumes 0.5ml of 0.02mol / l HCl solution per gram of glass

[0056] Alkali resistance test method: GB / T6580---1997 consumes 135mg / dm 3

[0057] Water resistance test method: GB12416.2-90 consumes 0.85mg / dm 3

[0058] Each composition of table 1 (by weight % is based on oxide meter) and performance

[0059]

[0060] NaCl

[0061]...

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Abstract

The invention discloses high chemical resistance borosilicate glass, comprising the following components based on oxides in percentage by weight: 71-75 SiO2, 3-6 Al2O3, 8-10 B2O3, 4-10 Na2O and 0-2.5 K2O, 0-1.2 CaO, 0-1 MgO, 1-3 BaO and 0-0.3 CeO2, wherein Na2O+K2O ranges from 7 to 10, and CaO+MgO ranges from 0 to 1.2. The invention has the following advantages: 1. As2O3, Sb2O3, BaSO4 and other harmful substances are not used in constituents, and the borosilicate glass can be used as a material for packing medicines; and 2. tested by experiments, the high chemical resistance borosilicate glass prepared from the constituents by the traditional production equipment has the coefficient of heat expansion ranging from 5.0*10<-6> K<-1> to 6.0*10<-6> K<-1>, the inversion temperature Tg ranging from 520 DEGC to 572 DEGC, the softening point ranging from 765 DEGC to 782 DEGC, the working temperature ranging from 920 DEGC to 1200 DEGC and the density ranging from, 2.32 g / cm<3> to 2.5g / cm<3>, which meet the requirement on medicinal packing and reduces the production cost.

Description

technical field [0001] The invention relates to a high chemical resistance borosilicate glass and its application. Background technique [0002] my country adopts an expansion coefficient of 7.0×10 -6 k -1 Low borosilicate glass is used to make primary packaging materials for medicines. This glass is a pharmaceutical packaging material independently developed by my country. The properties of medical glass mainly include chemical stability, thermal stability and mechanical strength. Relevant standards have been formulated for alkali resistance. The national standards for water resistance of medicinal glass in my country are GB12416.1-90, GB12416.2-90 and national standard GB4771-84 for alkali resistance, which are the inner surface of medical glass containers and Test methods and grading standards for water resistance and alkali resistance of glass materials. The material basically meets the standard requirements, but exceeds the standard requirements after secondary process...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C3/095A61J1/00
Inventor 郑树祥史生宏孙翔
Owner SHANDONG LINUO NEW MATERIAL
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