Process for producing silicatic moldings
View Patent ↗The invention relates to a process for producing a molding, characterized in that a silicatic solid is mixed with a solution comprising a first silicatic binder and the mixture is then press-molded, and the compression molding is then post-treated with a solution comprising a second silicatic binder, and to silicatic moldings obtainable by this process, and also to their use as construction material, insulator material, gasket material or fire-resistant material.
1. A process for producing a molding comprising:
(a) mixing a silicatic solid with a solution containing a first silicatic binder, and thereby forming a mixture;
(b) press-molding the mixture, and forming a compression molding; and
(c) post-treating the compression molding with a solution containing a second silicatic binder, wherein the second silicatic binder comprises a binder having a modulus that is at least 10.
2. The process according to claim 1 , wherein the second-silicatic binder has a higher modulus than the first silicatic binder.
3. The process according to claim 1 , wherein the first silicatic binder used comprises one whose modulus is at most 50.
4. The process according to claim 1 , wherein the first silicatic binder used comprises a binder having a modulus ranging from 1.5 to 10.
5. The process according to claim 1 , wherein the second silicatic binder used comprises a binder having a modulus ranging from 20 to 1000.
6. The process according to claim 1 , wherein the solution comprising the first silicatic binder has a solids content ranging from 5 to 60% by weight.
7. The process according to claim 1 , wherein the solution containing the second silicatic binder has a solids content ranging from 5 to 60% by weight.
8. The process according to claim 1 , wherein the post-treatment with the solution comprising the second silicatic binder takes place a technique selected from the group consisting of (i) via soaking, (ii) spray-application, (iii) spread-application, and (iv) combinations thereof, and the process farther comprises a step of subsequent drying.
9. The process according to claim 1 , wherein the silicatic solid is a phyllosilicate.
10. The process according to claim 1 , wherein the silicatic solid is a silicatic component selected from the group consisting of vermiculite, perlite, mica, 5 and combinations thereof.
11. The process according to claim 10 , wherein the silicatic solid is a vermiculite.