 Oligomeric aromatic dispersing agents, method of making same, and dispersions made therefrom |
| OF THE PREFERRED EMBODIMENTS As stated above, the oligomeric aromatic dispersant is a reaction ... |
|
| Softening non-swelling polyurethane |
| While this invention is satisfied by embodiments in many different forms, there will herein be ... |
|
| Coating composition of an acrylic polymer, polyol and polyisocyanate crosslinking agent |
| We claim: 1. A clear coating composition which cures at ambient temperatures having a film forming ... |
|
| Coating composition of hydroxy functional acrylic polymer, polyol and polyisocyanate crosslinking agent |
| We claim: 1. A clear coating composition having a film forming binder solids content of about 30-70%... |
|
| Polypropylene resin composition |
| What is claimed is: 1. A polypropylene resin composition consisting essentially of 50 to 90% by ... |
|
| Coating composition having low volatile organic content |
| OF THE INVENTION The coating composition includes, in an organic phase, a polymer, preferably an ... |
|
| Molded product of a polypropylene resin |
| Under these circumstances, it is an object of this invention to provide a molded product of a ... |
|
| Corrosion resistant coating for an iron-based part and method for applying same |
| OF THE PREFERRED EMBODIMENTS The preferred embodiments of this invention will now be described. T... |
|
| Polyurethane composition |
| 1. A polyurethane composition comprising a polyurethane having compounded therein: (a) a hindered ... |
|
| Book binding process |
| OF THE INVENTION The Binding Process Modern book binding involves a series of collating, gluing ... |
|
|
Polymer powders, pressure sensitive adhesives and methods of making the same
| Details |
Inventors: Holguin, Daniel L.; Barker, H. Paul; Lin, Kenneth S.;
Assignee: Avery Dennison Corporation (Pasadena, CA)
Primary Examiner: Lipman; Bernard
Assistant Examiner:
Attorney, Agent or Firm: Curatolo Sidoti Co., LPA, Curatolo; Joseph G., Sidoti; Salvatore A.
A method for making hydrophilic homopolymers and copolymers of poly 2-hydroxyethyl methacrylate. Also disclosed are coatings, films, hydrogels, cosmetic compositions, dermatological compositions, pressure sensitive adhesives containing the hydrophilic homopolymers or copolymers of poly 2-hydroxyethylmethacrylate. Further disclosed are methods of coating substrates with the hydrophilic homopolymers and copolymers of poly 2-hydroxyethyl methacrylate and hydrophilic pressure sensitive adhesives. |
|
DETAILED DESCRIPTION A method is provided for the preparation of gel-free poly 2-hydroxyethyl methacrylate substantially in the absence of a chain transfer agent, comprising introducing monomeric 2-hydroxyethyl methacrylate containing ethylene glycol dimethacrylate impurities in the range of no more than about 0.
05-0.
1% by weight of the monomer, into alcohol, polymerizing the 2-hydroxyethyl methacrylate to form a polymerization mixture, and optionally removing the alcohol.
The alcohol is preferably selected from one of methanol and ethanol.
Hydrophilic pressure sensitive adhesives are provided by adding polyethylene glycol to the polymerization mixture prior to removing the alcohol.
Flexible hydrophilic coatings also are provided by adding glycerin to the polymerization mixture prior to removing the alcohol by drying.
In another embodiment, the monomeric 2-hydroxyethyl methacrylate contains alkylene glycol methacrylate impurities in the range of no more than about 3% by weight, wherein the alkylene glycol methacrylate impurities are selected from the group consisting of ethylene glycol dimethacrylate, diethylene glycol monomethacrylate, methacrylic acid and mixtures thereof.
A method is also provided for the preparation of a gel free, hydrophilic, water soluble polymer substantially in the absence of a chain transfer agent comprising a copolymer of 2-hydroxyethyl methacrylate and acrylic acid or methacrylic acid, including introducing monomeric 2-hydroxyethyl methacrylate into water solution with one of acrylic acid and methacrylic acid, adjusting the pH of the solution to a pH in the range of greater than about pH 3 to less than about pH 9, and copolymerizing the monomeric 2-hydroxyethyl methacrylate and acrylic or methacrylic acid.
In one embodiment, the monomeric 2-hydroxyethyl methacrylate contains at least 0.
05% by weight, based on the monomer, of ethylene glycol dimethacrylate.
In another embodiment, hydrogels are prepared with copolymer concentrations greater than about 35% by weight
|
|
Adhesives and Rubbers 
