Compositions: coating or plastic – Coating or plastic compositions – Carbohydrate or derivative containing
Patent
1989-06-08
1990-10-23
Dixon, Jr., William R.
Compositions: coating or plastic
Coating or plastic compositions
Carbohydrate or derivative containing
162175, C09D10302, C09D10312, D21H 1912
Patent
active
049649159
ABSTRACT:
The present invention relates to a novel sizing composition in the form of an aqueous emulsion comprising a hydrophobic cellulose reactive sizing agent and a cationic polymer comprising a starch, the novel features of said composition being that the starch possesses a combination of (A) a branched, high molecular weight structure as reflected by an amylopectin content of at least 85% and (B) a degree of substitution of about 0.045 to 0.40.
Such sizing compositions can be prepared by dissolving the aforementioned starch in water, adjusting the temperature to above the melting point of the sizing agent and adding the sizing agent to the solution so as to form a coarse emulsion, which is subsequently subjected to shear forces to reduce the particle size of the emulsion.
REFERENCES:
patent: 2461139 (1949-02-01), Caldwell
patent: 3130118 (1964-04-01), Chapman
patent: 3223544 (1965-12-01), Savina
patent: 4240935 (1980-12-01), Dumas
patent: 4317756 (1982-03-01), Dumas
patent: 4382129 (1983-05-01), Bankert
patent: 4629655 (1986-12-01), Winters et al.
Blixt Tony
Hakansson Philip
Barr James P.
Brunsman David M.
Dixon Jr. William R.
W. R. Grace & Co.,-Conn.
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