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US 5,177,128 AGranted
Paper coating composition
AssigneeSequa Chemicals, Inc.
InventorsMartin K. Lindemann, Kim Deacon
Life of this patent
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Abstract
A paper coating composition is prepared containing a polymer emulsion which comprises a first polymer network which is intertwined on a molecular scale with a second polymer network.
Claims14
A paper or paperboard coating composition comprising:
- a pigment, a binder and an aqueous polymer emulsion containing a first polymer network which is crosslinked and which is mixed and intertwined on a molecular scale with a second polymer network wherein the second polymer differs from the first polymer and the first polymer comprises 5 to 95% on a solids by weight basis of the emulsion and the monomers of the first polymer and the second polymer are not readily copolymerizable.
A paper or paperboard coating composition comprising a pigment, a binder and an aqueous polymer emulsion prepared by the process comprising:
- a) forming a first polymer emulsion which is crosslinked;
- b) mixing a second monomer with the first polymer emulsion whereby an emulsion mixture of the first polymer emulsion and a second monomer emulsion is obtained;
- c) allowing the emulsion mixture to equilibrate;
- and
- d) then polymerizing the emulsion mixture providing a first polymer network which is mixed and intertwined on a molecular scale with the second polymer network, wherein the second polymer differs from the first polymer and wherein the monomers of the first polymer and the second polymer are not readily copolymerizable and the first polymer comprises 5 to 95% on a solids by weight basis of the emulsion mixture.
2 more elements
Dependencies are inferred from the claim text.