SEALANT COMPOSITIONS AND A PROCESS FOR THE PREPARATION THEREOF

Abstract: The invention relates to sealant compositions containing vegetable or animal oil, a mineral oil, a filler and a substance which is able to reduce the specific weight, as ingredients. The sealant compositions according to the invention are characterized in that they contain silicas and a surfactant. Furthermore the invention relates to a process for the preparation of the above disclosed sealant compositions, characterized in that a vegetable or animal oil, a mineral oil, silicas and a surfactant are throughly blended under obtaining a homogeneous blend, whereupon to the obtained blend under vigorous stirring there are added a substance for reducing the specific weight, filler and optionally a dye, wherein the stirring is continued until a homogeneous sealant composition is ob­ tained.

Description: Sealant compositions and a process for the preparation thereof. The invention relates to sealant compositions containing vegetable or animal oil, a mineral oil, a filler and a substance which is able to reduce the specific weight, as ingredients, and to a process for the preparation thereof. Related sealant compositions and a process for the preparation thereof are known from the Netherlands patent application 6911493. By using the known sealant compositions to seal roof tiles, in particular ridge tiles, it appeared that said sealant compositions have serious drawbacks. So it appeared that the above disclosed known sealant compositions after being used for joining roof tiles, for sealing gutters and for fastening roof tiles show an insufficient adhesion resulting in dislodging of the tiles after a certain period of time and in blowing off the tiles by harder wind. Furthermore the known sealant compositions appeared to show rupture. Another significant disadvantage of the known sealant compositions is that they are subjected to bird glutton. In addition it appears that after certain period of time oil is leaking from the known sealant compositions. The invention aims now to provide sealant compositions, wherein the above-mentioned drawbacks are removed efficiently Accordingly the sealant compositions according to the invention are characterized in that they contain silicas and a surfactant. pue to the presence of silicas and a surfactant the sealant compositions of the invention achieve thixotropic properties, which means that under influence of forces, such as pressure, pull power etc. the sealant compositions become plastical and after release of said pressure or force they return to their original form. It appeared that by using the sealant compositions of the invention for joining ridge tiles even by heavy wind the sealant compositions remain adhere to the tiles and they have the ability to follow the mutual displacement of the tiles due to the above mentioned thixotropic properties. Furthermore the sealant compositions according to the invention are not subjected to bird glutton. The oils present in the sealant compositions of the invention do not tend to leak away, such as in case of the known sealant compositions. The sealant compositions of the invention contain preferably 3-20%, by weight, of silicas and 0,5-3%, by weight, of surfactant. Whe silicas are amorphe microscopic particles having a particle size of a few/u. Suitable silicas are those, which are commercially available under the registered trademark Cab-o-sii (Aerosil). A suitable surfactant is for instance a polyvalent alcohol, in particular glycerine. It is assumed that the surfactant forms as to say a thin film around the separate silica particles under warranting a certain mutual affinity of the balls which are provided with a film, so that said balls are in the form of a chain and thereby exercise the favourable thixotropic property. The sealant compositions according to the invention may contain a dye in an amount of 0,1-1,1%, by weight. A preferred sealant composition according to the invention has the following formulation, based on the weight, woodfibres 8,58 talc 3,5% glycerine 1,2% linseed oil 53,8% mineral oil 20,7% silicas 6,2% polystyrene balls 5-6% dye 0,1-1,1%. It is noted that as a substance to reduce the specific weight materials may be used such as plastic materials, among others expanded polyurethan balls, expanded polystyrene balls etc. Furthermore cork particles may be used for this purpose too. As filler wood fibres are particularly suited. Furthermore the invention relates to a process for the preparation of the above disclosed sealant compositions, characterized in that a vegetable or animal oil, a mineral oil, silicas and a surfactant are throughly blended under obtaining a homogeneous blend, whereupon to the obtained blend under vigorous stirring there are added a substance for reducing the specific weight, filler and optionally a dye, wherein the stirring is continued until a homogeneous sealant composition is obtained. According to an embodiment first the linseed oil, mineral oil, glycerine and silicas are throughly mixed with each other under obtaining a homogeneous blend, whereupon to the obtained blend under vigorous stirring wood fibres, talc, polystyrene balls and dye are added under obtaining a homogeneous sealant composition. The process according to the invention is illustrated in more detail in light of the following example. XA14PI There are added to a vessel successively 53,8 kg of linseed oil, 1,2 kg of glycerine 20,7 kg of mineral oil and 6,2 kg of amorphe microscopic silicas. The mixture is stirred until a homogeneous blend is obtained in the form of a paste. Th the obtained paste successively 8,5 kg of wood fibres, 3,5 kg of talc, 6 kg of polystyrene balls provided with a fire retardant coating and 1 kg of dye are added under vigorous stirring, wherein the stirring is continued until a homogeneous sealant composition is obtained. The obtained sealant composition seems to be in particular useful for the permanent sealing of roof tiles in particular of ridge tiles and furthermore it possesses a superior adherence, resulting in the fact, that the tiles do not get separated even under extreme weather conditions, such as heavy wind.

Claims: CLAIMS 1. Sealant compositions containing vegetable or animal oil, a mineral oil, filler and a substance for reducing the specific weight as ingredients, c h a r a c t e r i z e d i n , that said sealant compositions contain silicas and a surfactant. 2, Sealant compositions according to claim 1, c h a r a c t e r i z e d i n , that they contain 3-20F, by weight, of silicas and 0,5-3%, by weight, of surfactant. 3. Sealant compositions according to claim 1 or 2, c h a r a c t e r i z e d i n , that said surfactant is glycerine. 4. Sealant compositions according to claims 1-3, c h a r a c t e r i z e d i n , that they contain 0,1-1,1%, by weight, of dye. 5. Sealant compositions according to claims 1-3, c h a r a c t e r i z e d i n , that they have the following formulation; woodfibres 8,5% talc 3,5% glycerine 1,2% linseed oil 53,8% mineral oil 20,78 silicas 6,2% polystyrene balls 5-6% dye 0,1-1,18. 6. A process for the preparation of the sealant compositions according to claims 1-5, c h a r a c t e r i z e d i n , that vegetable or animal oil, a mineral oil, silicas and a surfactant are throughly mixed with each other under obtaining a homogeneous blend, whereupon to the obtained blend under vigorous stirring a substance for reducing the specific weight, filler and optionally a dye are added, wherein the stirring is continued until a homogeneous sealant composition is obtained. 7. A process for the preparation of the sealant compositions according to claim 6, c h a r a c t e r i z e d i n , that linseed oil, mineral oil, glycerine and silicas are throughly mixed with each other under obtaining a homogeneous blend, whereupon to the obtained blend under vigorous stirring wood fibres, talc, polystyrene balls and dye are added under obtaining a homogeneous sealant composition.

Inventors: APPELMAN, MARCELLINUS J.J.T., APPELMAN, NICOLAAS G.
Applicants: FLEXIM INTERNATIONAL B.V.
Application year: 1985
Main classification: C09D5
IPC codes: C09K3, C09D5