CN1236670A

CN1236670A - Catalyst and its application in preparing chemically strengthened glass

Info

Publication number: CN1236670A
Application number: CN 99113616
Authority: CN
Inventors: 苏金
Original assignee: JINCHENG REFRIGERATING EQUIPMENT CO Ltd SHANGHAI
Current assignee: JINCHENG REFRIGERATING EQUIPMENT CO Ltd SHANGHAI
Priority date: 1999-04-08
Filing date: 1999-04-08
Publication date: 1999-12-01

Abstract

A catalyst used in chemically strenthened glass contains such components (wt. portions) as sodium or potassium silicate (1-2), SiO2 (5-8), potassium permanganate (1-2) and MnO2 (2-3). It can be added to potassium salt bath in strengthening container to speed up the exchange of K and Na ions in order to shorten production period and raise the bending strength of product.

Description

A kind of catalyst and the application in chemically toughened glass processing thereof

The present invention relates to chemical catalyst composition and application thereof, relate in particular to a kind of catalyst and the application in chemically toughened glass processing thereof.

The processing chemically toughened glass does not generally use catalyst at present, thereby process time is longer, and the finished product flexural strength is relatively poor.

Purpose of the present invention is exactly to provide a kind of process time that can shorten chemically toughened glass for the defective that overcomes above-mentioned prior art existence, improves the catalyst and the application thereof of finished product flexural strength.

Purpose of the present invention can realize in the following manner:

A kind of catalyst is characterized in that it forms (weight portion) by following prescription:

1～2 part in sodium metasilicate or potassium

5～8 parts of silica

1～2 part in potassium permanganate

2～3 parts of manganese dioxide

The application of above-mentioned catalyst in chemically toughened glass processing is characterized in that it comprises following processing step: (1). with float glass clean, drying; (2). the glass that drying is good is preheated to 100～200 ℃; (3). stir in bathing by described formulated catalyst of claim 1 and the sylvite that adds the chemical tempering treatment trough, the addition of catalyst is 0.5～5% (weight) of salt bath amount; (4). will put into the above-mentioned sylvite bath that contains catalyst by the glass after the preheating in the step (2) and flood 5～20 hours, salt temperature is controlled at 300～500 ℃; (5). the glass good dipping cools off, cleans, and obtains the chemically toughened glass finished product.

In the chemically toughened glass process, use catalyst of the present invention and do not use the tempering effect and the process time of catalyst as shown in table 1:

Table 1

Test event	Use catalyst	Without catalyst
Test event	Use catalyst	Without catalyst	3mm glass flexural strength reaches as high as	?600mpa	??400mpa
Reach the 400mpa required time	14 hours	20 hours	3mm glass flexural strength reaches as high as	?600mpa	??400mpa
Reach the 400mpa required time	14 hours	20 hours	Reach the 300mpa required time	10 hours	16 hours

As known from Table 1, in the chemically toughened glass process, use catalyst of the present invention can not only shorten process time (mainly being that this catalyst can improve in the glass exchange velocity of potassium ion in the sodium ion and salt bath), thereby reduce production costs, and can obviously strengthen the flexural strength of chemically toughened glass.

Accompanying drawing is a processing schematic diagram of the present invention.

Below in conjunction with drawings and Examples, the invention will be further described:

Embodiment 1～2

Catalyst formulation is as shown in table 2:

Table 2

Unit: kilogram

	Sodium metasilicate or potassium silicate	Silica	Potassium permanganate	Manganese dioxide
	Sodium metasilicate or potassium silicate	Silica	Potassium permanganate	Manganese dioxide	Embodiment 1	????2	????8	????2	????3
Embodiment 2	????1	????6	????1	????2	Embodiment 1	????2	????8	????2	????3

The application of above-mentioned catalyst in chemically toughened glass processing divides following processing step: (1). and drying in the baking oven is washed and entered to the float glass 1 of 1800 * a 900 * 3mm, this glass is put into be heated to 100 ℃ in the heating furnace then; (2) bathe in 3 by described formulated catalyst of table 2 and the sylvite that adds the chemical tempering treatment trough 2 of 3000 * 2000 * 1500mm and stir, the gross weight that sylvite is bathed is 1500 kilograms; (3). the above-mentioned sylvite bath that contains catalyst is clamped and put into to the glass after the preheating in the step (1) with anchor clamps 4 flooded 5～10 hours, the bottom of this glass is placed on the cell body base 5, and salt temperature is controlled at 300 ℃; (4). the glass good dipping cools off, cleans, and obtains the chemically toughened glass finished product that flexural strength can reach 300mpa.

Embodiment 3～4:

Catalyst formulation is identical with embodiment 1～2.The application of this catalyst in chemically toughened glass divides following processing step: (1). and a float glass identical with embodiment 1～2 is washed and dried, then this glass is preheated to 200 ℃; (2). by the described formulated catalyst of table 2 and add in the chemical tempering treatment trough identical with embodiment 1～2 and stir, the consumption of salt bath is also identical with embodiment 1～2; (3). the glass after the preheating in the step (1) is put into the above-mentioned sylvite that contains catalyst bathed dipping 20 hours, salt temperature is controlled at 500 ℃; (4) the good glass of dipping is cooled off, cleans, obtain the chemically toughened glass finished product that flexural strength can reach 600mpa.

Claims

1. catalyst is characterized in that it forms (weight portion) by following prescription:

1～2 part in sodium metasilicate or potassium

5～8 parts of silica

1～2 part in potassium permanganate

2～3 parts of manganese dioxide

2. the application of above-mentioned catalyst in chemically toughened glass processing is characterized in that it comprises following processing step: (1). with float glass clean, drying; (2). the glass that drying is good is preheated to 100～200 ℃; (3). stir in bathing by described formulated catalyst of claim 1 and the sylvite that adds the chemical tempering treatment trough, the addition of catalyst is 0.5～5% (weight) of salt bath amount; (4). the glass after the preheating in the step (2) is put into the above-mentioned sylvite bath that contains catalyst flooded 5～20 hours, salt temperature is controlled at 300～500 ℃; (5). the glass good dipping cools off, cleans, and obtains the chemically toughened glass finished product.