Untitled

Ichikawa

1990

Colloid & Polymer Sci

Absti'act: Two kinds of anionic polymer emulsions, of which particle sizes were greatly different, were blended and then cast on a release-paper at 30 ~ One was poly(butyl acrylate) emulsion, 0.46/an in diameter, produced by emulsifier-free emulsion polymerization, and the other was ethyl acrylate-methyl methacrylate (1/1, mole ratio) copolymer emulsion, 0.02 pm in diameter, produced by emulsifier-containing emulsion polymerization. The film produced had asymmetric surface properties: the air-side surface was nontacky and the bottom-side surface was tacky. The forming mechanism is discussed.

Section: Resultsmentioning

confidence: 60%

“…In a previous article [1], we prepared a two-layer composite cast on a glass plate from the blend of emulsifier-free polyethylacrylate (PEA) and poly(methyl methacrylate) (PMMA) emulsions. The upper layer at the air side was transparent and continuous, consisting mainly of PEA.…”

Section: Introductionmentioning

confidence: 99%

Preparation of asymmetric polymer film by emulsion blend technique

Ichikawa

1990

Colloid & Polymer Sci

“…In the P(EHA–MEA–AA) emulsion, the clear layer did not appear within 8 days, whereas in the P(EA–MMA) emulsion, the clear layer attributed to the sedimentation of the particles appeared at the top end. According to a previous study,13 this result suggests that there is a possibility of preparing a two‐layer film by casting a blend emulsion (1/1, w/w) of the P(EHA–MEA–AA) and P(EA–MMA) particles.…”

Section: Resultsmentioning

confidence: 52%

“…Two kinds of emulsions were blended for the purpose of improvement of properties such as film‐forming ability and mechanical properties 9–12. In our previous study,13 it was found that two‐layer emulsion films could be prepared from blend emulsions, in which two kinds of polymer particles having different colloidal stabilities were dispersed. In previous studies,14, 15 the influences of the particle sizes and amounts of surfactant on the formation of the two‐layer structure were examined in detail.…”

Section: Introductionmentioning

confidence: 99%

Preparation of two‐layer film having porous structure by emulsion blend technique

J of Applied Polymer Sci

Terada

Kagawa

2003

A two-layer film consisting of a tacky layer (air side) and a porous nontacky layer (release-paper side) was prepared by casting blend emulsion on a release paper, in which 150-nm 2-ethylhexyl acrylate-2-methoxyethyl acrylate-acrylic acid terpolymer particles having high storage stability and 542-nm ethyl acrylate-methyl methacrylate copolymer particles having low storage stability were dispersed. Both emulsion particles were produced by emulsifier-free emulsion copolymerizations. The difference of tackiness between both surfaces increased with increases in the film-formation time and the concentration of electrolytes in the blend emulsion, and resulted in the two-layer film. The film had a high water vapor permeability, which is also needed for medical adhesive tape.

Preparation of asymmetric film by blending two kinds of polymer emulsions having greatly different storage stabilities

J of Applied Polymer Sci

1991

SYNOPSISTwo kinds of anionic polymer emulsions with different particle sizes were blended and cast on a release-paper at 30°C. One was poly (butyl acrylate) emulsion, and the other was ethyl acrylate-methyl methacrylate ( 1 : 1, weight ratio) copolymer emulsion. They were produced by emulsifier-free emulsion polymerization. The blend films prepared in an appropriate range of the blend ratio had a great difference in tackiness between both surfaces: The airside surface exhibited tackiness and the release-paper side showed nontackiness. The forming mechanism is discussed.