Coating slips for paper and cardboard containing a dextrin with a high amylopectin content
A technology of pullulan, coating, applied in the field of dextrin, manufacture of said coating pigment, paper or cardboard coated with pigment, able to solve the problem of not giving information on the nature and characteristics of the latter
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example 1
[0049] This example concerns the preparation of adhesives comprising starch according to the prior art, dextrins not according to the invention and dextrins according to the invention. In this example, the binder was produced in a jet cooker which made it possible to cook the starch at 140° C. for 1 minute and 30 seconds.
[0050] The first is by Avebe TM Under the name Perfectamyl TM Oxidized starch with a weight average molecular weight of about 360 000 Da sold under A2177 (Product No. 1). Its amylopectin content is equal to 22%.
[0051] The second is by Roquette TM under the name Stabilys TM Dextrin with a weight average molecular weight of about 1 000 000 Da sold under A020 (Product No. 2). Its amylopectin content is equal to 24%.
[0052] The third is by Roquette TM under the name Stabilys TM Dextrin sold under A025 with a weight average molecular weight of about 270 000 Da (product number 3). Its amylopectin content is equal to 24%.
[0053] The fourth is...
example 2
[0062] This example involves the use of the product Perfectamyl TM A2077 (Product No. 1) for the preparation of coating pigments according to the prior art and of the coating pigments according to the invention with two dextrins, Product No. 4 and Product No. 5. The weight average molecular weight is equal to 1 500 000Da and 700 000Da respectively, and their amylopectin content is 99.5%.
[0063] Each coating color consists of the following:
[0064] -80 parts by weight of Nugloss TM (pigment);
[0065] -20 parts by weight Hydrocarb TM 60 (calcium carbonate);
[0066] - 12 parts by weight of non-synthetic binders according to the prior art or according to the invention;
[0067] -12 parts by weight by BASF TM In the name Styronal TM Styrene / butadiene type synthetic latex sold under 302S.
[0068] The solids content of these coating colors was fixed at 61% and their pH was adjusted to 8.5.
[0069] Coating colors A, B and C include products 1, 4 and 5, respectively. ...
example 3
[0080] In this example, a novel coating pigment formulation was prepared by using the following 4 products:
[0081] - product number 6 according to the prior art, which is an oxidized potato starch having a weight average molecular weight equal to approximately 520 000 Da and having an amylopectin content equal to 22%;
[0082] - already described (Stabilys TM A025) and represents the product number 3 of the prior art;
[0083] -represents prior art and is presented by Roquette TM under the name Stabilys TM Product number 7 sold under A035, with a weight average molecular weight equal to 120 000 Da and having an amylopectin content equal to 26%;
[0084] - and a product according to the invention (product number 8), which is a dextrin with a weight average molecular weight equal to approximately 1 100 000 Da and with an amylopectin content of 99.5%.
[0085] Each coating color consists of the following:
[0086] -100 parts by weight Hydrocarb TM 60 (calcium carbonate...
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