초록 ▼

Expanded perlite coated with an amino-functional siloxane and a silicone wetting agent, and a joint compound incorporating same, which, when applied to gypsum wallboard, has improved bonding properties and greater uniformity in paint gloss appearance between the surface of the joint compound and the

Expanded perlite coated with an amino-functional siloxane and a silicone wetting agent, and a joint compound incorporating same, which, when applied to gypsum wallboard, has improved bonding properties and greater uniformity in paint gloss appearance between the surface of the joint compound and the surface of the wallboard.

대표청구항 ▼

Expanded perlite which has been treated with an amino-functional silicone compound to render it water-insensitive while still providing good bonding properties to a joint compound into which it is formulated. A lightweight joint compound having properties suitable for use in finishing joints between

Expanded perlite which has been treated with an amino-functional silicone compound to render it water-insensitive while still providing good bonding properties to a joint compound into which it is formulated. A lightweight joint compound having properties suitable for use in finishing joints between the edges of adjacent wallboards, and having improved bonding to paper tape and paper cover sheets provided on said wallboard, said joint compound comprising: (1) a filler selected from the group consisting of calcium carbonate and calcium sulfate, (2) a non-leveling agent, (3) expanded perlite which has been treated with an amino-functional silicone compound to render said perlite water-insensitive and improving the joint compound to paper bond, said perlite being present in an amount of from about 3.5% to about 25% based on the dry weight of said joint compound, (4) a thickener, (5) a binder, and (6) sufficient water to adjust the viscosity to render said joint compound suitable for use.