Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Patent
1997-07-08
2000-11-21
Sanders, Kriellion
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
524109, 524114, 524196, 524197, 524228, 524588, C08K 534, C08K 515, C08K 529
Patent
active
061504416
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
This invention relates to a composition for use in the binding of two or more layers of glass plates, particularly to a composition for double glazing use which has low moisture permeability and can be applied as a one-pack type sealant to various base materials.
BACKGROUND ART
With the aim of effecting bonding, reinforcement or replenishment of the same or different materials, various sealing materials are used in the assembly process of architecture, automobiles and the like, and various materials having different curinging modes and principal chains have been proposed depending on each purpose. However, a material having all required characteristics including (1) high weather resistance, (2) high heat resistance, (3) quick hardenability, (4) low moisture permeability and (5) adhesiveness with inorganic materials cannot be found in commonly used sealing materials for double glazing use, and virtually nothing is known about a material in which (6) one-pack stability is taken into consideration.
For example, silicone based sealing materials of addition type curing mode satisfy the above characteristics (1), (2), (3), (5) and, in some cases, (6) but do not have the characteristic (4), so that environmental problems such as peripheral pollution are observed when they are used as sealants. Also, a high polymer material having a saturated hydrocarbon polymer as its principal chain, which has been disclosed in JP-A-1-198673 (the term "JP-A" as used herein refers to a "published unexamined Japanese patent application"), cannot satisfy the aforementioned characteristic (3) because of its condensing type curing mode.
On the other hand, double glazing produced by binding two or more layers of glass plates is used in order to improve adiabatic property, sound insulation property and the like of glass. In the double glazing, air between the glass plates is shielded from the outside to form a dead air space. In order to form such a dead air space, a sealant is used as occasion demands in the peripheral area between the glass plates via a spacing member.
Examples of the characteristics required for the sealant to be used in the production of double glazing include like spacing member for keeping a space between two glass plates and the two glass plate, stably for a prolonged period of time, in the dead air space and the like.
However, a sealant which can satisfy both of these characteristics a) and b) is not known in the conventionally used sealants, so that two types of sealants having respective characteristics must be used in combination. For example, characteristics required as so-called double seal are given by the use of a silicone or thiokol based sealant as a material having the characteristic of a) and a butyl based hot melt sealant as a material having the characteristic of b). However, when the butyl based hot melt sealant having the characteristic of b) is used alone, thoroughly satisfactory results cannot be obtained in terms of weather resistant adhesiveness and mechanical characteristics so that there is caused a problem that the characteristic of a) cannot be satisfied.
In view of the above-described situations, it is therefore an object of the present invention to provide a curable composition and a sealant for double glazing use which have the aforementioned characteristics (1) to (6) and excellent mechanical property.
That is, the present invention is to provide a composition for double glazing use which satisfies the aforementioned characteristics a) and b) and also has quick hardenability by addition type curing, can be produced by a line process and is able to be used as a one-pack type sealant having excellent shelf stability and mechanical properties.
DISCLOSURE OF THE INVENTION
As a result of intensive investigation to achieve the above object, the inventors of the present invention have found a composition for double glazing use which has a curing mode different from the techniques described in the aforementioned JP-A-1-198673 and can satisfy the aforementioned character
REFERENCES:
patent: 5120379 (1992-06-01), Noda et al.
Chiba Makoto
Sakaguchi Masashi
Kanegafuchi Kagaku Kogyo & Kabushiki Kaisha
Sanders Kriellion
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