Anti-sagging gypsum product and a method to manufacture
AssigneeSaint-Gobain Placo
InventorsXiaotong Gao, Huifen Li, Hao Song, Ke Zhang
Life of this patent
Estimating the term…
Abstract
The present invention provides a composition, a gypsum board and their preparation method and the use of ascorbic acid as an anti-sagging additive in a gypsum board. Said gypsum board comprises set gypsum prepared from the composition; while said composition comprises hemi-hydrate gypsum, water and a compound comprising group and no carboxylate groups. The set gypsum prepared from the said composition shows better anti-sagging or deformation resisting property. The gypsum board of the present invention is hardly distorted and has stronger stability even in the condition of high humidity, thus improve the quality of the gypsum board to meet the demands of the customer.
Claims17
A gypsum board composition, comprising:
- gypsum, starch, and an anti-deformation additive,
- wherein the anti-deformation additive is selected from L-Ascorbyl 6-palmitate, L-Ascorbyl stearate, Benzene-1,2,3-triol, or any combination thereof, and
- wherein a mass percentage of the anti-deformation additive ranges from 0.1% to 5% of the mass of the gypsum.
A method for forming a composition, comprising:
- mixing gypsum powder, starch, and an anti-deformation additive with water to create a mixture;
- and
- stirring the mixture,
- wherein the anti-deformation additive is selected from L-Ascorbyl 6-palmitate, L-Ascorbyl stearate, or any combination thereof, and
- wherein a mass percentage of the anti-deformation additive ranges from 0.1% to 5% of the mass of the gypsum.
A gypsum board, comprising:
- gypsum, starch, dispersant, accelerator, an anti-deformation additive, and a foaming agent,
- wherein the anti-deformation additive is selected from ascorbic acid, L-Ascorbyl 6-palmitate, L-Ascorbyl stearate, Benzene-1,2,3-triol, or any combination thereof, and
- wherein a mass percentage of the anti-deformation additive ranges from 0.1% to 5% of the mass of the gypsum.
A method for forming a gypsum board, comprising:
- mixing gypsum, water, starch, an accelerator, a dispersant, an anti-deformation additive, and a foaming agent, to create a mixture;
- wherein the anti-deformation additive is selected from ascorbic acid, L-Ascorbyl 6-palmitate, L-Ascorbyl stearate, Benzene-1,2,3-triol, or any combination thereof, and wherein a mass percentage of the anti-deformation additive ranges from 0.1% to 5% of the mass of the gypsum;
- stirring the mixture to form a slurry;
- disposing the slurry between two liners to form a sandwich structure;
- forming a first board based on the sandwich structure;
- cutting the first board into a plurality of second boards with desired lengths after a hardening process;
- drying the plurality of second boards to evaporate excess water.
A method of reducing deformation in a gypsum product comprising adding at least one compound selected from ascorbic acid, L-Ascorbyl 6-palmitate, L-Ascorbyl stearate, Benzene-1,2,3-triol, or any combination thereof as an anti-deformation additive in the gypsum product, and wherein a mass percentage of the anti-deformation additive ranges from 0.1% to 5% of the mass of the gypsum.
A gypsum board, comprising:
- gypsum, starch, dispersant, accelerator, and an anti-deformation additive,
- wherein the anti-deformation additive is selected from ascorbic acid, L-Ascorbyl 6-palmitate, L-Ascorbyl stearate, Benzene-1,2,3-triol, or any combination thereof, and
- wherein a mass percentage of the anti-deformation additive ranges from 0.1% to 5% of the mass of the gypsum.
A method for forming a gypsum board, comprising:
- mixing gypsum, water, starch, an accelerator, a dispersant, and an anti-deformation additive, to create a mixture;
- wherein the anti-deformation additive is selected from ascorbic acid, L-Ascorbyl 6-palmitate, L-Ascorbyl stearate, Benzene-1,2,3-triol, or any combination thereof, and wherein a mass percentage of the anti-deformation additive ranges from 0.1% to 5% of the mass of the gypsum;
- stirring the mixture to form a slurry;
- disposing the slurry between two liners to form a sandwich structure;
- forming a first board based on the sandwich structure;
- cutting the first board into a plurality of second boards with desired lengths after a hardening process;
- drying the plurality of second boards to evaporate excess water.
Dependencies are inferred from the claim text.