| 摘要 |
The thickener comprises: (a) 25-45% of methacrylic acid, acrylic acid or a mixture thereof; (b) 25-65% of alkyl acrylate such as methyl acrylate, ethyl acrylate, butyl acrylate, alkyl methacrylate such as methyl methacrylate, ethyl methacrylate, butyl methacrylate, lauryl methacrylate or a mixture thereof; (c) 1-40% of an ester of composition; <IMAGE> in which R is a C12-C25 alkyl group, n=at least 10; m=at least 5 A=H, -(CH2CH2O)n-R, C1-C20 alkyl,-(CH2CH2O)m-H or -(CH2CH2O)m-CH3 (d) 0-1% of a polyethylenically unsaturated monomer effective for chain branching or crosslinking such as diallyl maleate, diallyl phthalate, divinyl benzene, allyl methacrylate, ethylene glycol dimethacrylate, or trimethylol propane triacrylate, (e) optionally, but preferably, up to 10% of an ethylenically unsaturated hydrophylic monomer.
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