Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Patent
1992-02-28
1996-08-27
Michl, Paul R.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
524 52, C08L 300, C08L 8900
Patent
active
055501770
ABSTRACT:
Aqueous ambient temperature pastes and gels of starch and poly(ethylene-co-acrylic acid) are disclosed containing starch in an amount from about 2.5% to about 10%, by weight, of the paste or gel, and poly(ethylene-co-acrylic acid) in an amount from about 0.5% to about 20%, by weight, of the starch, the poly(ethylene-co-acrylic acid) content being sufficient to provide aqueous ambient temperature pastes having higher viscosities than the same ambient temperature pastes without poly(ethylene-co-acrylic acid) and to provide aqueous ambient temperature gels having different gel strengths from the same ambient temperature gels without poly(ethylene-co-acrylic acid). These pastes and gels are prepared by a method in which a starch and poly(ethylene-co-acrylic acid) mixture in an aqueous medium is cooked, preferably by steam-jet cooking, and the resulting starch-poly(ethylene-co-acrylic acid) solution/dispersion is cooled to ambient temperature with water retained in the solution/dispersion.
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Maxwell, C. S., "Effect of Ethylene Copolymer-Starch Blends on Water Resistance of Paper", Tappi 53(8): 1464-1466 (Aug. 1970).
Fanta, G. F., Swanson, C. L., and Doane, W. M., "Composites of Starch and Poly(ethylene-co-acrylic acid). Complexing between Polymeric Components", J. of Applied Poly. Sci. 40: 811-821 (1990).
Christianson Donald D.
Fanta George F.
DeWitt LaVonda R.
Fado John D.
Michl Paul R.
Ribando Curtis P.
Silverstein M. Howard
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