Appeal No. 2004-1178
Application No. 09/655,899
BACKGROUND
Appellant’s invention relates to a flexible setting type joint
compound and the method of producing flexible joints. Claims 1 and 7,
which are representative of the claimed invention, appear below:
1. A flexible setting joint compound comprising, for each 100
parts by weight calcium sulfate hemihydrate:
• 2 to 20 parts by weight (solids) of an emulsion polymer
having a Tg of less than about -40 "C
• 26 to 44 parts by weight total water;
• 0 to 20 parts by weight inert filler;
• 0 to 5 parts by weight additional surfactant; and
• 0 to 5 parts by weight of an accelerator.
7. A method for producing flexible joints comprising:
a) supplying a first planar substrate having a first edge;
b) abutting a second edge of a second planar substrate
against said first edge of the first planar substrate, thereby
forming a joint;
c) applying a setting hydraulic joint compound to the joint,
said joint compound comprising, for each 100 parts by weight
calcium sulfate hemihydrate:
• 2 to 20 parts by weight (solids) of an emulsion polymer
having a Tg of less than about -40 "C;
• 26 to 44 parts by weight total water;
• 0 to 20 parts by weight inert filler;
• 0 to 5 parts by weight additional surfactant; and
• 0 to 5 parts by weight of an accelerator.
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Last modified: November 3, 2007