Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1996-11-08
1998-07-07
Zitomer, Fred
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
525 80, 525 85, 525222, 525227, 525228, 525238, C08L 3312, C08L 3320, C08L 3308, C08L 3310
Patent
active
057770344
ABSTRACT:
The invention encompasses a new methacrylate resin blend composition, and a method of making the blend composition, having improved solvent craze resistance. The new blend composition contains a methacrylate matrix resin, particles of a single layer polymer, and, optionally, an acrylic multi-layer polymer. Particles of the single layer polymer derived from 50% or more methyl methacrylate, and having weight average molecular weight (Mw) at least 120% of the Mw of the methacrylate matrix resin component of the blend, the particles having a diameter of from 50 to 500 nanometers, have been discovered to confer a solvent craze resistance value to the methacrylate resin blend which is at least twice the solvent craze resistance value of the methacrylate resin absent particles of the single layer polymer. Solvent craze resistance of the blend may be improved by as much as 10-fold or more over the solvent craze resistance of the methacrylate matrix resin alone.
REFERENCES:
patent: 3793402 (1974-02-01), Owens
patent: 3846368 (1974-11-01), Pettit, Jr.
patent: 3957921 (1976-05-01), Iwahashi
patent: 4740553 (1988-04-01), Maeda
patent: 4774291 (1988-09-01), Maeda
patent: 5324781 (1994-06-01), Date
Lin Manhua
Shah Nilesh
Donatiello Guy
Rohm and Haas Company
Zitomer Fred
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