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US 4,599,271 AGranted
Microencapsulation of polyisocyanates by interchange of multiple
AssigneeMoore Business Forms, Inc.
InventorHung-Ya Chao
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Abstract
A method of microencapsulation is disclosed whereby two or more organic-in-aqueous emulsions, each containing a reactive component in the organic phase, are mixed together causing the reactive components to react and form polymeric walls around the organic droplets. Either, neither or both emulsions may contain one or more fill materials in their organic phases.
Claims14
A method of making microcapsules having generally continuous polymeric walls comprising the following steps:
- (a) preparing a first organic-in-aqueous emulsion comprising a first organic solution having a first oil soluble reactive material dissolved therein and a first aqueous emulsification solution, said first oil soluble reactive material being a polyisocyanate;
- (b) preparing a second organic-in-aqueous emulsion comprising a second organic solution having a second oil soluble reactive material dissolved therein and a second aqueous emulsification solution, said second oil soluble reactive material being an amine;
- and
- (c) mixing said organic-in-aqueous emulsions such that said oil soluble reactive materials react to form said microcapsules, said microcapsules encapsulating said first oil soluble reactive material.
1 more element
Microcapsules having generally continuous polymeric walls prepared by a method comprising the following steps:
- (a) preparing a first organic-in-aqueous emulsion comprising a first organic solution having a first oil soluble reactive material dissolved therein and a first aqueous emulsification solution, said first oil soluble reactive material being a polyisocyanate;
- (b) preparing a second organic-in-aqueous emulsion comprising a second organic solution having a second oil soluble reactive material dissolved therein and a second aqueous emulsification solution, said second oil soluble reactive material being an amine;
- and
- (c) mixing said organic-in-aqueous emulsions such that said oil soluble reactive materials react to form said microcapsules, said microcapsules encapsulating said first oil soluble reactive material.
1 more element
Dependencies are inferred from the claim text.