Epoxy silanes in reactive polymer emulsions

被引：33

作者：

Chen, MJ ^{[1
]}

Osterholtz, FD ^{[1
]}

Chaves, A ^{[1
]}

Ramdatt, PE ^{[1
]}

Waldman, BA ^{[1
]}

机构：

[1] Witco Corp, OrganoSilicones Grp, Tarrytown, NY 10591 USA

来源：

JOURNAL OF COATINGS TECHNOLOGY | 1997年 / 69卷 / 875期

关键词：

Additives - Adhesion - Crosslinking - Emulsions - Epoxy resins - Latexes - Molecular structure - pH effects - Solubility - Solvents;

D O I：

10.1007/BF02720170

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Epoxy silanes are effective additives for the crosslinking of carboxy and amino latexes and polyurethane dispersions. A series of epoxy silane additives have been evaluated in both one-pack and two-pack systems. It is found that the structure and water solubility of the epoxy silane as well as the pH of the latex determine silane stability. New water insoluble epoxy silanes achieve longterm shelf stability in emulsions yet crosslink upon application of the coating. Formulating principles, performance improvements, and catalytic cure profiles are reported. Carboxyl-modified waterborne polymer dispersions with post-added epoxy silanes provide curable coatings, in which properties such as mar, chemical and solvent resistance, adhesion, and durability are dramatically improved. In many applications, this approach is a potential candidate for crosslinkable waterborne systems free of aziridines and formaldehyde.

引用

页码：49 / 55

页数：7

共 8 条

[1]

BERG, 1993, Patent No. 29093606

[2] Silanes in high-solids and waterborne coatings [J].

Chen, MJ ;

Osterholtz, FD ;

Pohl, ER ;

Ramdatt, PE ;

Chaves, A ;

Bennett, V .

JOURNAL OF COATINGS TECHNOLOGY, 1997, 69 (870) :43-51

[3]

CHEN MJ, 1996, SURFACE COAT INT, V12, P539

[4]

CHEN MJ, 1996, P 23 WAT HIGH SOL PO, P222

[5]

CHEN MJ, 1996, P EUR 96 C SEPT

[6]

HAHN, 1990, Patent No. 401496

[7]

LONG, 1977, Patent No. 4049869

[8]

PONS DA, 1992, Patent No. 5100955

← 1 →