Invention Grant
- Patent Title: Gypsum wallboard
- Patent Title (中): 石膏墙板
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Application No.: US13018951Application Date: 2011-02-01
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Publication No.: US08592541B2Publication Date: 2013-11-26
- Inventor: Ira John Westerman
- Applicant: Ira John Westerman
- Applicant Address: US OH Fairlawn
- Assignee: OMNOVA Solutions Inc.
- Current Assignee: OMNOVA Solutions Inc.
- Current Assignee Address: US OH Fairlawn
- Agency: Fay Sharpe LLP
- Main IPC: C08F257/02
- IPC: C08F257/02 ; C08F291/00 ; C08F2/22 ; C08F2/24
Abstract:
Gypsum wallboard can be made lighter and less dense, without sacrificing strength, by adding to the gypsum slurry used in making the board a styrene butadiene polymer latex substantially stable against divalent ions in which the styrene butadiene polymer includes at least 0.25 wt. % of an ionic monomer.
Public/Granted literature
- US20110130505A1 GYPSUM WALLBOARD Public/Granted day:2011-06-02
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