Low MFT and high Tg , internally plasticizing, and low voc latex compositions
US6203720A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 24, 1996 |
| Grant date | Mar 20, 2001 |
| Priority date | — |
| Expiry date | Dec 24, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D135/06
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Novel latex or emulsion compositions containing internally plasticizing and crosslinkable monomers derived from traditional semi-drying or non-drying oils are disclosed and claimed. The monomers are ethylenically unsaturated esters of long-chain olefinic compounds. Preferred embodiments include latex formed from acrylate or methacrylate esters of hydroxy fatty acid esters derived from castor oil or lesquerella oil. A process for the synthesis of the latex composition is also disclosed, which involves (a) an esterification reaction of ethylenically unsaturated carboxylic acid or its derivatives with a substituted hydroxy long-chain olefinic compound; (b) subsequent polymerization of the so formed ethylenically unsaturated ester of a long-chain olefinic compound in an aqueous phase with at least one other copolymerizable monomer; and (c) blending so formed polymer with at least one drier and a surfactant to form the novel latex or emulsion compositions. These compositions form films at low minimum film forming temperatures (MFT) ranging from -5 to 10.degree. C. and cure to above ambient glass transition (T.sub.g) polymers without the use of traditional organic cosolvents which contri…
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