Invention Grant
- Patent Title: Woodworking adhesives based on multistage emulsion polymer
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Application No.: US116319Application Date: 1993-09-03
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Publication No.: US5391608APublication Date: 1995-02-21
- Inventor: Paul R. Mudge , George Hespe
- Applicant: Paul R. Mudge , George Hespe
- Applicant Address: DE Wilmington
- Assignee: National Starch and Chemical Investment Holding Corporation
- Current Assignee: National Starch and Chemical Investment Holding Corporation
- Current Assignee Address: DE Wilmington
- Main IPC: C08F263/04
- IPC: C08F263/04 ; C09J151/00 ; C09J131/04
Abstract:
A woodworking adhesive composition prepared by a two stage emulsion polymerization procedure wherein the first stage comprises the step of emulsion polymerizing vinyl acetate with 0.1 to 6% by weight of a post-crosslinking monomer in the presence of polyvinyl alcohol to produce a polyvinyl alcohol stabilized copolymer having a Tg within the range of +10.degree. to +40.degree. C. and containing no pre-crosslinking monomers and the second stage comprises the step of emulsion polymerizing methyl methacrylate to produce a methyl methacrylate homo- or copolymer containing at least 75% by weight methyl methacrylate and having a Tg within the range of +50.degree. to +120.degree. C., further characterized in that the ratio of the polymer produced in the first stage to the polymer produced in the second stage is within the range of 10:1 to 10:6 and wherein the first stage polymer and second stage monomer mixture are not equilibrated prior to the second stage polymerization.
Public/Granted literature
- USD432722S Makeup or cosmetics container Public/Granted day:2000-10-24
Information query
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