Surface enhancing coating for gypsum-containing floor underlayments
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C08K-003/30
C08K-003/00
C04B-028/36
C04B-028/00
출원번호
US-0755786
(2004-01-12)
등록번호
US-7276549
(2007-10-02)
발명자
/ 주소
Liu,Qingxia
Ellicson,John W.
McDonald,David
출원인 / 주소
United States Gypsum Company
대리인 / 주소
Greer, Burns & Crain, Ltd.
인용정보
피인용 횟수 :
3인용 특허 :
16
초록▼
A coating for preparing a floor underlayment to receive an adhesive includes a water-soluble, latex polymer, a defoamer and a dual-function surface enhancing agent. The surface enhancing agent includes a set accelerator that also functions to cross link the adhesive, hardening the surface of the und
A coating for preparing a floor underlayment to receive an adhesive includes a water-soluble, latex polymer, a defoamer and a dual-function surface enhancing agent. The surface enhancing agent includes a set accelerator that also functions to cross link the adhesive, hardening the surface of the underlayment using at least two mechanisms. One embodiment of the invention is a dry mixture that forms a coating when added to water. The dry mixture includes from about 10% to about 50% of the redispersible polymer by weight based on the mixture, from about 50% to about 90% of the surface enhancing agent and from about 0.15% to about 0.25% of the defoamer by weight based on the mixture. Other embodiments describe a liquid coating formed by adding from about 1 to about 8 pails water to 1 part of the dry mixture on a volumc basisby volume based on the mixture.
대표청구항▼
What is claimed is: 1. A mixture for use with water as a coating between an adhesive and a floor underlayment made with calcined gypsum, said mixture comprising: from about 10% to about 50% by weight based on the mixture of a redispersible, latex polymer; from about 50% to about 90% by weight based
What is claimed is: 1. A mixture for use with water as a coating between an adhesive and a floor underlayment made with calcined gypsum, said mixture comprising: from about 10% to about 50% by weight based on the mixture of a redispersible, latex polymer; from about 50% to about 90% by weight based on the mixture of a surface enhancing agent, said surface enhancing agent being selected to function as both a set accelerator for calcined gypsum and also as a cross-linking agent for the adhesive and selected from the group consisting of potassium sulfate, zinc sulfate, sodium sulfate, magnesium sulfate, copper sulfate, ferrous sulfate, ferric sulfate and aluminum sulfate; and from about 0.15% to about 0.25% by weight based on the mixture of a defoamer. 2. The mixture of claim 1 wherein said surface enhancing agent is zinc sulfate. 3. The mixture of claim 1 further comprising a wetting agent. 4. The mixture of claim 3 wherein said wetting agent is present in amounts of from about 0.2% to about 1% by weight based on the mixture. 5. The mixture of claim 1 further comprising a mildewcide. 6. The mixture of claim 5 wherein said mildewcide is present in amounts of from about 0.03% to about 0.05% by weight based on the mixture. 7. A coating for preparing a floor underlayment to receive an adhesive comprising: from about 1 part to about 8 parts by volume water; and about 1 part by volume of a coating mixture comprising: from about 10% to about 50% of a redispersible polymer based on the weight of said coating mixture; from about 50% to about 90% of a surface enhancing agent based on the weight of said coating mixture, said surface enhancing agent being selected to function as both a set accelerator for calcined gypsum and also as a cross-linking agent for the adhesive and selected from the group consisting of potassium sulfate, sodium sulfate, magnesium sulfate, zinc sulfate, copper sulfate, ferrous sulfate, ferric sulfate and aluminum sulfate; and from about 0.15% to about 0.25% of a defoamer based on the weight of said coating mixture. 8. The coating of claim 7 wherein said redispersible polymer is selected from the group consisting of polyacrylates, polymethacrylates, styrene-butadiene copolymers, vinyl acetate co-polymers, vinyl chloride co-polymers, polybutadienes, and polyisoprenes. 9. The coating of claim 7 further comprising a wetting agent. 10. The coating of claim 7 further comprising a mildewcide.
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Sadvary, Richard J.; Anderson, Lawrence G.; Tyebjee, Shiryn; Hockswender, Thomas R., Coating compositions having improved adhesion, coated substrates and methods related thereto.
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